internal/rosa/libxml2: 2.15.2 to 2.15.3

Signed-off-by: Ophestra <cat@gensokyo.uk>

cmd/mbf/cache.go

@@ -0,0 +1,94 @@
+package main
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"hakurei.app/check"
+	"hakurei.app/internal/pkg"
+	"hakurei.app/message"
+)
+
+// cache refers to an instance of [pkg.Cache] that might be open.
+type cache struct {
+	ctx context.Context
+	msg message.Msg
+
+	// Should generally not be used directly.
+	c *pkg.Cache
+
+	cures, jobs        int
+	hostAbstract, idle bool
+
+	base string
+}
+
+// open opens the underlying [pkg.Cache].
+func (cache *cache) open() (err error) {
+	if cache.c != nil {
+		return os.ErrInvalid
+	}
+
+	if cache.base == "" {
+		cache.base = "cache"
+	}
+	var base *check.Absolute
+	if cache.base, err = filepath.Abs(cache.base); err != nil {
+		return
+	} else if base, err = check.NewAbs(cache.base); err != nil {
+		return
+	}
+
+	var flags int
+	if cache.idle {
+		flags |= pkg.CSchedIdle
+	}
+	if cache.hostAbstract {
+		flags |= pkg.CHostAbstract
+	}
+
+	done := make(chan struct{})
+	defer close(done)
+	go func() {
+		select {
+		case <-cache.ctx.Done():
+			if testing.Testing() {
+				return
+			}
+			os.Exit(2)
+
+		case <-done:
+			return
+		}
+	}()
+
+	cache.msg.Verbosef("opening cache at %s", base)
+	cache.c, err = pkg.Open(
+		cache.ctx,
+		cache.msg,
+		flags,
+		cache.cures,
+		cache.jobs,
+		base,
+	)
+	return
+}
+
+// Close closes the underlying [pkg.Cache] if it is open.
+func (cache *cache) Close() {
+	if cache.c != nil {
+		cache.c.Close()
+	}
+}
+
+// Do calls f on the underlying cache and returns its error value.
+func (cache *cache) Do(f func(cache *pkg.Cache) error) error {
+	if cache.c == nil {
+		if err := cache.open(); err != nil {
+			return err
+		}
+	}
+	return f(cache.c)
+}

cmd/mbf/cache_test.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"log"
+	"os"
+	"testing"
+
+	"hakurei.app/internal/pkg"
+	"hakurei.app/message"
+)
+
+func TestCache(t *testing.T) {
+	t.Parallel()
+
+	cm := cache{
+		ctx:  t.Context(),
+		msg:  message.New(log.New(os.Stderr, "check: ", 0)),
+		base: t.TempDir(),
+
+		hostAbstract: true, idle: true,
+	}
+	defer cm.Close()
+	cm.Close()
+
+	if err := cm.open(); err != nil {
+		t.Fatalf("open: error = %v", err)
+	}
+	if err := cm.open(); err != os.ErrInvalid {
+		t.Errorf("(duplicate) open: error = %v", err)
+	}
+
+	if err := cm.Do(func(cache *pkg.Cache) error {
+		return cache.Scrub(0)
+	}); err != nil {
+		t.Errorf("Scrub: error = %v", err)
+	}
+}

cmd/mbf/daemon.go

@@ -0,0 +1,343 @@
+package main
+
+import (
+	"context"
+	"encoding/binary"
+	"errors"
+	"io"
+	"log"
+	"math"
+	"net"
+	"os"
+	"sync"
+	"syscall"
+	"testing"
+	"time"
+	"unique"
+
+	"hakurei.app/check"
+	"hakurei.app/internal/pkg"
+)
+
+// daemonTimeout is the maximum amount of time cureFromIR will wait on I/O.
+const daemonTimeout = 30 * time.Second
+
+// daemonDeadline returns the deadline corresponding to daemonTimeout, or the
+// zero value when running in a test.
+func daemonDeadline() time.Time {
+	if testing.Testing() {
+		return time.Time{}
+	}
+	return time.Now().Add(daemonTimeout)
+}
+
+const (
+	// remoteNoReply notifies that the client will not receive a cure reply.
+	remoteNoReply = 1 << iota
+)
+
+// cureFromIR services an IR curing request.
+func cureFromIR(
+	cache *pkg.Cache,
+	conn net.Conn,
+	flags uint64,
+) (pkg.Artifact, error) {
+	a, decodeErr := cache.NewDecoder(conn).Decode()
+	if decodeErr != nil {
+		_, err := conn.Write([]byte("\x00" + decodeErr.Error()))
+		return nil, errors.Join(decodeErr, err, conn.Close())
+	}
+
+	pathname, _, cureErr := cache.Cure(a)
+	if flags&remoteNoReply != 0 {
+		return a, errors.Join(cureErr, conn.Close())
+	}
+	if err := conn.SetWriteDeadline(daemonDeadline()); err != nil {
+		return a, errors.Join(cureErr, err, conn.Close())
+	}
+	if cureErr != nil {
+		_, err := conn.Write([]byte("\x00" + cureErr.Error()))
+		return a, errors.Join(cureErr, err, conn.Close())
+	}
+	_, err := conn.Write([]byte(pathname.String()))
+	if testing.Testing() && errors.Is(err, io.ErrClosedPipe) {
+		return a, nil
+	}
+	return a, errors.Join(err, conn.Close())
+}
+
+const (
+	// specialCancel is a message consisting of a single identifier referring
+	// to a curing artifact to be cancelled.
+	specialCancel = iota
+	// specialAbort requests for all pending cures to be aborted. It has no
+	// message body.
+	specialAbort
+
+	// remoteSpecial denotes a special message with custom layout.
+	remoteSpecial = math.MaxUint64
+)
+
+// writeSpecialHeader writes the header of a remoteSpecial message.
+func writeSpecialHeader(conn net.Conn, kind uint64) error {
+	var sh [16]byte
+	binary.LittleEndian.PutUint64(sh[:], remoteSpecial)
+	binary.LittleEndian.PutUint64(sh[8:], kind)
+	if n, err := conn.Write(sh[:]); err != nil {
+		return err
+	} else if n != len(sh) {
+		return io.ErrShortWrite
+	}
+	return nil
+}
+
+// cancelIdent reads an identifier from conn and cancels the corresponding cure.
+func cancelIdent(
+	cache *pkg.Cache,
+	conn net.Conn,
+) (*pkg.ID, bool, error) {
+	var ident pkg.ID
+	if _, err := io.ReadFull(conn, ident[:]); err != nil {
+		return nil, false, errors.Join(err, conn.Close())
+	} else if err = conn.Close(); err != nil {
+		return nil, false, err
+	}
+	return &ident, cache.Cancel(unique.Make(ident)), nil
+}
+
+// serve services connections from a [net.UnixListener].
+func serve(
+	ctx context.Context,
+	log *log.Logger,
+	cm *cache,
+	ul *net.UnixListener,
+) error {
+	ul.SetUnlinkOnClose(true)
+	if cm.c == nil {
+		if err := cm.open(); err != nil {
+			return errors.Join(err, ul.Close())
+		}
+	}
+
+	var wg sync.WaitGroup
+	defer wg.Wait()
+
+	wg.Go(func() {
+		for {
+			if ctx.Err() != nil {
+				break
+			}
+
+			conn, err := ul.AcceptUnix()
+			if err != nil {
+				if !errors.Is(err, os.ErrDeadlineExceeded) {
+					log.Println(err)
+				}
+				continue
+			}
+			wg.Go(func() {
+				done := make(chan struct{})
+				defer close(done)
+				go func() {
+					select {
+					case <-ctx.Done():
+						_ = conn.SetDeadline(time.Now())
+
+					case <-done:
+						return
+					}
+				}()
+
+				if _err := conn.SetReadDeadline(daemonDeadline()); _err != nil {
+					log.Println(_err)
+					if _err = conn.Close(); _err != nil {
+						log.Println(_err)
+					}
+					return
+				}
+
+				var word [8]byte
+				if _, _err := io.ReadFull(conn, word[:]); _err != nil {
+					log.Println(_err)
+					if _err = conn.Close(); _err != nil {
+						log.Println(_err)
+					}
+					return
+				}
+				flags := binary.LittleEndian.Uint64(word[:])
+
+				if flags == remoteSpecial {
+					if _, _err := io.ReadFull(conn, word[:]); _err != nil {
+						log.Println(_err)
+						if _err = conn.Close(); _err != nil {
+							log.Println(_err)
+						}
+						return
+					}
+					switch special := binary.LittleEndian.Uint64(word[:]); special {
+					default:
+						log.Printf("invalid special %d", special)
+
+					case specialCancel:
+						if id, ok, _err := cancelIdent(cm.c, conn); _err != nil {
+							log.Println(_err)
+						} else if !ok {
+							log.Println(
+								"attempting to cancel invalid artifact",
+								pkg.Encode(*id),
+							)
+						} else {
+							log.Println(
+								"cancelled artifact",
+								pkg.Encode(*id),
+							)
+						}
+
+					case specialAbort:
+						if _err := conn.Close(); _err != nil {
+							log.Println(_err)
+						}
+						log.Println("aborting all pending cures")
+						cm.c.Abort()
+					}
+
+					return
+				}
+
+				if a, _err := cureFromIR(cm.c, conn, flags); _err != nil {
+					log.Println(_err)
+				} else {
+					log.Printf(
+						"fulfilled artifact %s",
+						pkg.Encode(cm.c.Ident(a).Value()),
+					)
+				}
+			})
+		}
+	})
+
+	<-ctx.Done()
+	if err := ul.SetDeadline(time.Now()); err != nil {
+		return errors.Join(err, ul.Close())
+	}
+	wg.Wait()
+	return ul.Close()
+}
+
+// dial wraps [net.DialUnix] with a context.
+func dial(ctx context.Context, addr *net.UnixAddr) (
+	done chan<- struct{},
+	conn *net.UnixConn,
+	err error,
+) {
+	conn, err = net.DialUnix("unix", nil, addr)
+	if err != nil {
+		return
+	}
+
+	d := make(chan struct{})
+	done = d
+	go func() {
+		select {
+		case <-ctx.Done():
+			_ = conn.SetDeadline(time.Now())
+
+		case <-d:
+			return
+		}
+	}()
+	return
+}
+
+// cureRemote cures a [pkg.Artifact] on a daemon.
+func cureRemote(
+	ctx context.Context,
+	addr *net.UnixAddr,
+	a pkg.Artifact,
+	flags uint64,
+) (*check.Absolute, error) {
+	if flags == remoteSpecial {
+		return nil, syscall.EINVAL
+	}
+
+	done, conn, err := dial(ctx, addr)
+	if err != nil {
+		return nil, err
+	}
+	defer close(done)
+
+	if n, flagErr := conn.Write(binary.LittleEndian.AppendUint64(nil, flags)); flagErr != nil {
+		return nil, errors.Join(flagErr, conn.Close())
+	} else if n != 8 {
+		return nil, errors.Join(io.ErrShortWrite, conn.Close())
+	}
+
+	if err = pkg.NewIR().EncodeAll(conn, a); err != nil {
+		return nil, errors.Join(err, conn.Close())
+	} else if err = conn.CloseWrite(); err != nil {
+		return nil, errors.Join(err, conn.Close())
+	}
+
+	if flags&remoteNoReply != 0 {
+		return nil, conn.Close()
+	}
+
+	payload, recvErr := io.ReadAll(conn)
+	if err = errors.Join(recvErr, conn.Close()); err != nil {
+		if errors.Is(err, os.ErrDeadlineExceeded) {
+			if cancelErr := ctx.Err(); cancelErr != nil {
+				err = cancelErr
+			}
+		}
+		return nil, err
+	}
+
+	if len(payload) > 0 && payload[0] == 0 {
+		return nil, errors.New(string(payload[1:]))
+	}
+
+	var p *check.Absolute
+	p, err = check.NewAbs(string(payload))
+	return p, err
+}
+
+// cancelRemote cancels a [pkg.Artifact] curing on a daemon.
+func cancelRemote(
+	ctx context.Context,
+	addr *net.UnixAddr,
+	a pkg.Artifact,
+) error {
+	done, conn, err := dial(ctx, addr)
+	if err != nil {
+		return err
+	}
+	defer close(done)
+
+	if err = writeSpecialHeader(conn, specialCancel); err != nil {
+		return errors.Join(err, conn.Close())
+	}
+
+	var n int
+	id := pkg.NewIR().Ident(a).Value()
+	if n, err = conn.Write(id[:]); err != nil {
+		return errors.Join(err, conn.Close())
+	} else if n != len(id) {
+		return errors.Join(io.ErrShortWrite, conn.Close())
+	}
+	return conn.Close()
+}
+
+// abortRemote aborts all [pkg.Artifact] curing on a daemon.
+func abortRemote(
+	ctx context.Context,
+	addr *net.UnixAddr,
+) error {
+	done, conn, err := dial(ctx, addr)
+	if err != nil {
+		return err
+	}
+	defer close(done)
+
+	err = writeSpecialHeader(conn, specialAbort)
+	return errors.Join(err, conn.Close())
+}

cmd/mbf/daemon_test.go

@@ -0,0 +1,146 @@
+package main
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	"io"
+	"log"
+	"net"
+	"os"
+	"path/filepath"
+	"slices"
+	"strings"
+	"testing"
+	"time"
+
+	"hakurei.app/check"
+	"hakurei.app/internal/pkg"
+	"hakurei.app/message"
+)
+
+func TestNoReply(t *testing.T) {
+	t.Parallel()
+	if !daemonDeadline().IsZero() {
+		t.Fatal("daemonDeadline did not return the zero value")
+	}
+
+	c, err := pkg.Open(
+		t.Context(),
+		message.New(log.New(os.Stderr, "cir: ", 0)),
+		0, 0, 0,
+		check.MustAbs(t.TempDir()),
+	)
+	if err != nil {
+		t.Fatalf("Open: error = %v", err)
+	}
+	defer c.Close()
+
+	client, server := net.Pipe()
+	done := make(chan struct{})
+	go func() {
+		defer close(done)
+		go func() {
+			<-t.Context().Done()
+			if _err := client.SetDeadline(time.Now()); _err != nil && !errors.Is(_err, io.ErrClosedPipe) {
+				panic(_err)
+			}
+		}()
+
+		if _err := c.EncodeAll(
+			client,
+			pkg.NewFile("check", []byte{0}),
+		); _err != nil {
+			panic(_err)
+		} else if _err = client.Close(); _err != nil {
+			panic(_err)
+		}
+	}()
+
+	a, cureErr := cureFromIR(c, server, remoteNoReply)
+	if cureErr != nil {
+		t.Fatalf("cureFromIR: error = %v", cureErr)
+	}
+
+	<-done
+	wantIdent := pkg.MustDecode("fiZf-ZY_Yq6qxJNrHbMiIPYCsGkUiKCRsZrcSELXTqZWtCnESlHmzV5ThhWWGGYG")
+	if gotIdent := c.Ident(a).Value(); gotIdent != wantIdent {
+		t.Errorf(
+			"cureFromIR: %s, want %s",
+			pkg.Encode(gotIdent), pkg.Encode(wantIdent),
+		)
+	}
+}
+
+func TestDaemon(t *testing.T) {
+	t.Parallel()
+
+	var buf bytes.Buffer
+	logger := log.New(&buf, "daemon: ", 0)
+
+	addr := net.UnixAddr{
+		Name: filepath.Join(t.TempDir(), "daemon"),
+		Net:  "unix",
+	}
+
+	ctx, cancel := context.WithCancel(t.Context())
+	defer cancel()
+
+	cm := cache{
+		ctx:  ctx,
+		msg:  message.New(logger),
+		base: t.TempDir(),
+	}
+	defer cm.Close()
+
+	ul, err := net.ListenUnix("unix", &addr)
+	if err != nil {
+		t.Fatalf("ListenUnix: error = %v", err)
+	}
+
+	done := make(chan struct{})
+	go func() {
+		defer close(done)
+		if _err := serve(ctx, logger, &cm, ul); _err != nil {
+			panic(_err)
+		}
+	}()
+
+	if err = cancelRemote(ctx, &addr, pkg.NewFile("nonexistent", nil)); err != nil {
+		t.Fatalf("cancelRemote: error = %v", err)
+	}
+
+	if err = abortRemote(ctx, &addr); err != nil {
+		t.Fatalf("abortRemote: error = %v", err)
+	}
+
+	// keep this last for synchronisation
+	var p *check.Absolute
+	p, err = cureRemote(ctx, &addr, pkg.NewFile("check", []byte{0}), 0)
+	if err != nil {
+		t.Fatalf("cureRemote: error = %v", err)
+	}
+
+	cancel()
+	<-done
+
+	const want = "fiZf-ZY_Yq6qxJNrHbMiIPYCsGkUiKCRsZrcSELXTqZWtCnESlHmzV5ThhWWGGYG"
+	if got := filepath.Base(p.String()); got != want {
+		t.Errorf("cureRemote: %s, want %s", got, want)
+	}
+
+	wantLog := []string{
+		"",
+		"daemon: aborting all pending cures",
+		"daemon: attempting to cancel invalid artifact kQm9fmnCmXST1-MMmxzcau2oKZCXXrlZydo4PkeV5hO_2PKfeC8t98hrbV_ZZx_j",
+		"daemon: fulfilled artifact fiZf-ZY_Yq6qxJNrHbMiIPYCsGkUiKCRsZrcSELXTqZWtCnESlHmzV5ThhWWGGYG",
+	}
+	gotLog := strings.Split(buf.String(), "\n")
+	slices.Sort(gotLog)
+	if !slices.Equal(gotLog, wantLog) {
+		t.Errorf(
+			"serve: logged\n%s\nwant\n%s",
+			strings.Join(gotLog, "\n"), strings.Join(wantLog, "\n"),
+		)
+	}
+}

cmd/mbf/info.go

@@ -0,0 +1,127 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"strings"
+
+	"hakurei.app/internal/pkg"
+	"hakurei.app/internal/rosa"
+)
+
+// commandInfo implements the info subcommand.
+func commandInfo(
+	cm *cache,
+	args []string,
+	w io.Writer,
+	writeStatus bool,
+	reportPath string,
+) (err error) {
+	if len(args) == 0 {
+		return errors.New("info requires at least 1 argument")
+	}
+
+	var r *rosa.Report
+	if reportPath != "" {
+		if r, err = rosa.OpenReport(reportPath); err != nil {
+			return err
+		}
+		defer func() {
+			if closeErr := r.Close(); err == nil {
+				err = closeErr
+			}
+		}()
+		defer r.HandleAccess(&err)()
+	}
+
+	// recovered by HandleAccess
+	mustPrintln := func(a ...any) {
+		if _, _err := fmt.Fprintln(w, a...); _err != nil {
+			panic(_err)
+		}
+	}
+	mustPrint := func(a ...any) {
+		if _, _err := fmt.Fprint(w, a...); _err != nil {
+			panic(_err)
+		}
+	}
+
+	for i, name := range args {
+		if p, ok := rosa.ResolveName(name); !ok {
+			return fmt.Errorf("unknown artifact %q", name)
+		} else {
+			var suffix string
+			if version := rosa.Std.Version(p); version != rosa.Unversioned {
+				suffix += "-" + version
+			}
+			mustPrintln("name        : " + name + suffix)
+
+			meta := rosa.GetMetadata(p)
+			mustPrintln("description : " + meta.Description)
+			if meta.Website != "" {
+				mustPrintln("website     : " +
+					strings.TrimSuffix(meta.Website, "/"))
+			}
+			if len(meta.Dependencies) > 0 {
+				mustPrint("depends on  :")
+				for _, d := range meta.Dependencies {
+					s := rosa.GetMetadata(d).Name
+					if version := rosa.Std.Version(d); version != rosa.Unversioned {
+						s += "-" + version
+					}
+					mustPrint(" " + s)
+				}
+				mustPrintln()
+			}
+
+			const statusPrefix = "status      : "
+			if writeStatus {
+				if r == nil {
+					var f io.ReadSeekCloser
+					err = cm.Do(func(cache *pkg.Cache) (err error) {
+						f, err = cache.OpenStatus(rosa.Std.Load(p))
+						return
+					})
+					if err != nil {
+						if errors.Is(err, os.ErrNotExist) {
+							mustPrintln(
+								statusPrefix + "not yet cured",
+							)
+						} else {
+							return
+						}
+					} else {
+						mustPrint(statusPrefix)
+						_, err = io.Copy(w, f)
+						if err = errors.Join(err, f.Close()); err != nil {
+							return
+						}
+					}
+				} else if err = cm.Do(func(cache *pkg.Cache) (err error) {
+					status, n := r.ArtifactOf(cache.Ident(rosa.Std.Load(p)))
+					if status == nil {
+						mustPrintln(
+							statusPrefix + "not in report",
+						)
+					} else {
+						mustPrintln("size        :", n)
+						mustPrint(statusPrefix)
+						if _, err = w.Write(status); err != nil {
+							return
+						}
+					}
+					return
+				}); err != nil {
+					return
+				}
+			}
+
+			if i != len(args)-1 {
+				mustPrintln()
+			}
+		}
+	}
+	return nil
+}

cmd/mbf/info_test.go

@@ -0,0 +1,170 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"reflect"
+	"strings"
+	"syscall"
+	"testing"
+	"unsafe"
+
+	"hakurei.app/internal/pkg"
+	"hakurei.app/internal/rosa"
+	"hakurei.app/message"
+)
+
+func TestInfo(t *testing.T) {
+	t.Parallel()
+
+	testCases := []struct {
+		name    string
+		args    []string
+		status  map[string]string
+		report  string
+		want    string
+		wantErr any
+	}{
+		{"qemu", []string{"qemu"}, nil, "", `
+name        : qemu-` + rosa.Std.Version(rosa.QEMU) + `
+description : a generic and open source machine emulator and virtualizer
+website     : https://www.qemu.org
+depends on  : glib-` + rosa.Std.Version(rosa.GLib) + ` zstd-` + rosa.Std.Version(rosa.Zstd) + `
+`, nil},
+
+		{"multi", []string{"hakurei", "hakurei-dist"}, nil, "", `
+name        : hakurei-` + rosa.Std.Version(rosa.Hakurei) + `
+description : low-level userspace tooling for Rosa OS
+website     : https://hakurei.app
+
+name        : hakurei-dist-` + rosa.Std.Version(rosa.HakureiDist) + `
+description : low-level userspace tooling for Rosa OS (distribution tarball)
+website     : https://hakurei.app
+`, nil},
+
+		{"nonexistent", []string{"zlib", "\x00"}, nil, "", `
+name        : zlib-` + rosa.Std.Version(rosa.Zlib) + `
+description : lossless data-compression library
+website     : https://zlib.net
+
+`, fmt.Errorf("unknown artifact %q", "\x00")},
+
+		{"status cache", []string{"zlib", "zstd"}, map[string]string{
+			"zstd":    "internal/pkg (amd64) on satori\n",
+			"hakurei": "internal/pkg (amd64) on satori\n\n",
+		}, "", `
+name        : zlib-` + rosa.Std.Version(rosa.Zlib) + `
+description : lossless data-compression library
+website     : https://zlib.net
+status      : not yet cured
+
+name        : zstd-` + rosa.Std.Version(rosa.Zstd) + `
+description : a fast compression algorithm
+website     : https://facebook.github.io/zstd
+status      : internal/pkg (amd64) on satori
+`, nil},
+
+		{"status cache perm", []string{"zlib"}, map[string]string{
+			"zlib": "\x00",
+		}, "", `
+name        : zlib-` + rosa.Std.Version(rosa.Zlib) + `
+description : lossless data-compression library
+website     : https://zlib.net
+`, func(cm *cache) error {
+			return &os.PathError{
+				Op:   "open",
+				Path: filepath.Join(cm.base, "status", pkg.Encode(cm.c.Ident(rosa.Std.Load(rosa.Zlib)).Value())),
+				Err:  syscall.EACCES,
+			}
+		}},
+
+		{"status report", []string{"zlib"}, nil, strings.Repeat("\x00", len(pkg.Checksum{})+8), `
+name        : zlib-` + rosa.Std.Version(rosa.Zlib) + `
+description : lossless data-compression library
+website     : https://zlib.net
+status      : not in report
+`, nil},
+	}
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+
+			var (
+				cm  *cache
+				buf strings.Builder
+				rp  string
+			)
+
+			if tc.status != nil || tc.report != "" {
+				cm = &cache{
+					ctx:  context.Background(),
+					msg:  message.New(log.New(os.Stderr, "info: ", 0)),
+					base: t.TempDir(),
+				}
+				defer cm.Close()
+			}
+
+			if tc.report != "" {
+				rp = filepath.Join(t.TempDir(), "report")
+				if err := os.WriteFile(
+					rp,
+					unsafe.Slice(unsafe.StringData(tc.report), len(tc.report)),
+					0400,
+				); err != nil {
+					t.Fatal(err)
+				}
+			}
+
+			if tc.status != nil {
+				for name, status := range tc.status {
+					p, ok := rosa.ResolveName(name)
+					if !ok {
+						t.Fatalf("invalid name %q", name)
+					}
+					perm := os.FileMode(0400)
+					if status == "\x00" {
+						perm = 0
+					}
+					if err := cm.Do(func(cache *pkg.Cache) error {
+						return os.WriteFile(filepath.Join(
+							cm.base,
+							"status",
+							pkg.Encode(cache.Ident(rosa.Std.Load(p)).Value()),
+						), unsafe.Slice(unsafe.StringData(status), len(status)), perm)
+					}); err != nil {
+						t.Fatalf("Do: error = %v", err)
+					}
+				}
+			}
+
+			var wantErr error
+			switch c := tc.wantErr.(type) {
+			case error:
+				wantErr = c
+			case func(cm *cache) error:
+				wantErr = c(cm)
+			default:
+				if tc.wantErr != nil {
+					t.Fatalf("invalid wantErr %#v", tc.wantErr)
+				}
+			}
+
+			if err := commandInfo(
+				cm,
+				tc.args,
+				&buf,
+				cm != nil,
+				rp,
+			); !reflect.DeepEqual(err, wantErr) {
+				t.Fatalf("commandInfo: error = %v, want %v", err, wantErr)
+			}
+
+			if got := buf.String(); got != strings.TrimPrefix(tc.want, "\n") {
+				t.Errorf("commandInfo:\n%s\nwant\n%s", got, tc.want)
+			}
+		})
+	}
+}

cmd/mbf/main.go

@@ -14,16 +14,17 @@ package main
 
 import (
 	"context"
+	"crypto/sha512"
 	"errors"
 	"fmt"
 	"io"
 	"log"
+	"net"
 	"os"
 	"os/signal"
 	"path/filepath"
 	"runtime"
 	"strconv"
-	"strings"
 	"sync"
 	"sync/atomic"
 	"syscall"
@@ -53,14 +54,13 @@ func main() {
 		log.Fatal("this program must not run as root")
 	}
 
-	var cache *pkg.Cache
 	ctx, stop := signal.NotifyContext(context.Background(),
 		syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)
 	defer stop()
+
+	var cm cache
 	defer func() {
-		if cache != nil {
+		cm.Close()
-			cache.Close()
-		}
 
 		if r := recover(); r != nil {
 			fmt.Println(r)
@@ -70,60 +70,65 @@ func main() {
 
 	var (
 		flagQuiet bool
-		flagCures int
-		flagBase  string
-		flagIdle  bool
 
-		flagHostAbstract bool
+		addr net.UnixAddr
 	)
-	c := command.New(os.Stderr, log.Printf, "mbf", func([]string) (err error) {
+	c := command.New(os.Stderr, log.Printf, "mbf", func([]string) error {
 		msg.SwapVerbose(!flagQuiet)
+		cm.ctx, cm.msg = ctx, msg
+		cm.base = os.ExpandEnv(cm.base)
 
-		flagBase = os.ExpandEnv(flagBase)
+		addr.Net = "unix"
-		if flagBase == "" {
+		addr.Name = os.ExpandEnv(addr.Name)
-			flagBase = "cache"
+		if addr.Name == "" {
+			addr.Name = "daemon"
 		}
 
-		var base *check.Absolute
+		return nil
-		if flagBase, err = filepath.Abs(flagBase); err != nil {
-			return
-		} else if base, err = check.NewAbs(flagBase); err != nil {
-			return
-		}
-
-		var flags int
-		if flagIdle {
-			flags |= pkg.CSchedIdle
-		}
-		if flagHostAbstract {
-			flags |= pkg.CHostAbstract
-		}
-		cache, err = pkg.Open(ctx, msg, flags, flagCures, base)
-
-		return
 	}).Flag(
 		&flagQuiet,
 		"q", command.BoolFlag(false),
 		"Do not print cure messages",
 	).Flag(
-		&flagCures,
+		&cm.cures,
 		"cures", command.IntFlag(0),
 		"Maximum number of dependencies to cure at any given time",
 	).Flag(
-		&flagBase,
+		&cm.jobs,
+		"jobs", command.IntFlag(0),
+		"Preferred number of jobs to run, when applicable",
+	).Flag(
+		&cm.base,
 		"d", command.StringFlag("$MBF_CACHE_DIR"),
 		"Directory to store cured artifacts",
 	).Flag(
-		&flagIdle,
+		&cm.idle,
 		"sched-idle", command.BoolFlag(false),
 		"Set SCHED_IDLE scheduling policy",
 	).Flag(
-		&flagHostAbstract,
+		&cm.hostAbstract,
 		"host-abstract", command.BoolFlag(
 			os.Getenv("MBF_HOST_ABSTRACT") != "",
 		),
 		"Do not restrict networked cure containers from connecting to host "+
 			"abstract UNIX sockets",
+	).Flag(
+		&addr.Name,
+		"socket", command.StringFlag("$MBF_DAEMON_SOCKET"),
+		"Pathname of socket to bind to",
+	)
+
+	c.NewCommand(
+		"checksum", "Compute checksum of data read from standard input",
+		func([]string) error {
+			go func() { <-ctx.Done(); os.Exit(1) }()
+			h := sha512.New384()
+			if _, err := io.Copy(h, os.Stdin); err != nil {
+				return err
+			}
+			log.Println(pkg.Encode(pkg.Checksum(h.Sum(nil))))
+			return nil
+		},
 	)
 
 	{
@@ -137,7 +142,9 @@ func main() {
 				if flagShifts < 0 || flagShifts > 31 {
 					flagShifts = 12
 				}
-				return cache.Scrub(runtime.NumCPU() << flagShifts)
+				return cm.Do(func(cache *pkg.Cache) error {
+					return cache.Scrub(runtime.NumCPU() << flagShifts)
+				})
 			},
 		).Flag(
 			&flagShifts,
@@ -155,105 +162,17 @@ func main() {
 			"info",
 			"Display out-of-band metadata of an artifact",
 			func(args []string) (err error) {
-				if len(args) == 0 {
+				return commandInfo(&cm, args, os.Stdout, flagStatus, flagReport)
-					return errors.New("info requires at least 1 argument")
-				}
-
-				var r *rosa.Report
-				if flagReport != "" {
-					if r, err = rosa.OpenReport(flagReport); err != nil {
-						return err
-					}
-					defer func() {
-						if closeErr := r.Close(); err == nil {
-							err = closeErr
-						}
-					}()
-					defer r.HandleAccess(&err)()
-				}
-
-				for i, name := range args {
-					if p, ok := rosa.ResolveName(name); !ok {
-						return fmt.Errorf("unknown artifact %q", name)
-					} else {
-						var suffix string
-						if version := rosa.Std.Version(p); version != rosa.Unversioned {
-							suffix += "-" + version
-						}
-						fmt.Println("name        : " + name + suffix)
-
-						meta := rosa.GetMetadata(p)
-						fmt.Println("description : " + meta.Description)
-						if meta.Website != "" {
-							fmt.Println("website     : " +
-								strings.TrimSuffix(meta.Website, "/"))
-						}
-						if len(meta.Dependencies) > 0 {
-							fmt.Print("depends on  :")
-							for _, d := range meta.Dependencies {
-								s := rosa.GetMetadata(d).Name
-								if version := rosa.Std.Version(d); version != rosa.Unversioned {
-									s += "-" + version
-								}
-								fmt.Print(" " + s)
-							}
-							fmt.Println()
-						}
-
-						const statusPrefix = "status      : "
-						if flagStatus {
-							if r == nil {
-								var f io.ReadSeekCloser
-								f, err = cache.OpenStatus(rosa.Std.Load(p))
-								if err != nil {
-									if errors.Is(err, os.ErrNotExist) {
-										fmt.Println(
-											statusPrefix + "not yet cured",
-										)
-									} else {
-										return
-									}
-								} else {
-									fmt.Print(statusPrefix)
-									_, err = io.Copy(os.Stdout, f)
-									if err = errors.Join(err, f.Close()); err != nil {
-										return
-									}
-								}
-							} else {
-								status, n := r.ArtifactOf(cache.Ident(rosa.Std.Load(p)))
-								if status == nil {
-									fmt.Println(
-										statusPrefix + "not in report",
-									)
-								} else {
-									fmt.Println("size        :", n)
-									fmt.Print(statusPrefix)
-									if _, err = os.Stdout.Write(status); err != nil {
-										return
-									}
-								}
-							}
-						}
-
-						if i != len(args)-1 {
-							fmt.Println()
-						}
-					}
-				}
-				return nil
 			},
-		).
+		).Flag(
-			Flag(
+			&flagStatus,
-				&flagStatus,
+			"status", command.BoolFlag(false),
-				"status", command.BoolFlag(false),
+			"Display cure status if available",
-				"Display cure status if available",
+		).Flag(
-			).
+			&flagReport,
-			Flag(
+			"report", command.StringFlag(""),
-				&flagReport,
+			"Load cure status from this report file instead of cache",
-				"report", command.StringFlag(""),
+		)
-				"Load cure status from this report file instead of cache",
-			)
 	}
 
 	c.NewCommand(
@@ -287,7 +206,9 @@ func main() {
 			if ext.Isatty(int(w.Fd())) {
 				return errors.New("output appears to be a terminal")
 			}
-			return rosa.WriteReport(msg, w, cache)
+			return cm.Do(func(cache *pkg.Cache) error {
+				return rosa.WriteReport(msg, w, cache)
+			})
 		},
 	)
 
@@ -350,14 +271,26 @@ func main() {
 					" package(s) are out of date"))
 			}
 			return errors.Join(errs...)
-		}).
+		}).Flag(
-			Flag(
+			&flagJobs,
-				&flagJobs,
+			"j", command.IntFlag(32),
-				"j", command.IntFlag(32),
+			"Maximum number of simultaneous connections",
-				"Maximum number of simultaneous connections",
+		)
-			)
 	}
 
+	c.NewCommand(
+		"daemon",
+		"Service artifact IR with Rosa OS extensions",
+		func(args []string) error {
+			ul, err := net.ListenUnix("unix", &addr)
+			if err != nil {
+				return err
+			}
+			log.Printf("listening on pathname socket at %s", addr.Name)
+			return serve(ctx, log.Default(), &cm, ul)
+		},
+	)
+
 	{
 		var (
 			flagGentoo   string
@@ -382,25 +315,37 @@ func main() {
 					rosa.SetGentooStage3(flagGentoo, checksum)
 				}
 
-				_, _, _, stage1 := (t - 2).NewLLVM()
-				_, _, _, stage2 := (t - 1).NewLLVM()
-				_, _, _, stage3 := t.NewLLVM()
 				var (
 					pathname *check.Absolute
 					checksum [2]unique.Handle[pkg.Checksum]
 				)
 
-				if pathname, _, err = cache.Cure(stage1); err != nil {
+				if err = cm.Do(func(cache *pkg.Cache) (err error) {
-					return err
+					pathname, _, err = cache.Cure(
+						(t - 2).Load(rosa.Clang),
+					)
+					return
+				}); err != nil {
+					return
 				}
 				log.Println("stage1:", pathname)
 
-				if pathname, checksum[0], err = cache.Cure(stage2); err != nil {
+				if err = cm.Do(func(cache *pkg.Cache) (err error) {
-					return err
+					pathname, checksum[0], err = cache.Cure(
+						(t - 1).Load(rosa.Clang),
+					)
+					return
+				}); err != nil {
+					return
 				}
 				log.Println("stage2:", pathname)
-				if pathname, checksum[1], err = cache.Cure(stage3); err != nil {
+				if err = cm.Do(func(cache *pkg.Cache) (err error) {
-					return err
+					pathname, checksum[1], err = cache.Cure(
+						t.Load(rosa.Clang),
+					)
+					return
+				}); err != nil {
+					return
 				}
 				log.Println("stage3:", pathname)
 
@@ -417,39 +362,41 @@ func main() {
 				}
 
 				if flagStage0 {
-					if pathname, _, err = cache.Cure(
+					if err = cm.Do(func(cache *pkg.Cache) (err error) {
-						t.Load(rosa.Stage0),
+						pathname, _, err = cache.Cure(
-					); err != nil {
+							t.Load(rosa.Stage0),
-						return err
+						)
+						return
+					}); err != nil {
+						return
 					}
 					log.Println(pathname)
 				}
 
 				return
 			},
-		).
+		).Flag(
-			Flag(
+			&flagGentoo,
-				&flagGentoo,
+			"gentoo", command.StringFlag(""),
-				"gentoo", command.StringFlag(""),
+			"Bootstrap from a Gentoo stage3 tarball",
-				"Bootstrap from a Gentoo stage3 tarball",
+		).Flag(
-			).
+			&flagChecksum,
-			Flag(
+			"checksum", command.StringFlag(""),
-				&flagChecksum,
+			"Checksum of Gentoo stage3 tarball",
-				"checksum", command.StringFlag(""),
+		).Flag(
-				"Checksum of Gentoo stage3 tarball",
+			&flagStage0,
-			).
+			"stage0", command.BoolFlag(false),
-			Flag(
+			"Create bootstrap stage0 tarball",
-				&flagStage0,
+		)
-				"stage0", command.BoolFlag(false),
-				"Create bootstrap stage0 tarball",
-			)
 	}
 
 	{
 		var (
-			flagDump   string
+			flagDump    string
-			flagEnter  bool
+			flagEnter   bool
-			flagExport string
+			flagExport  string
+			flagRemote  bool
+			flagNoReply bool
 		)
 		c.NewCommand(
 			"cure",
@@ -465,7 +412,11 @@ func main() {
 
 				switch {
 				default:
-					pathname, _, err := cache.Cure(rosa.Std.Load(p))
+					var pathname *check.Absolute
+					err := cm.Do(func(cache *pkg.Cache) (err error) {
+						pathname, _, err = cache.Cure(rosa.Std.Load(p))
+						return
+					})
 					if err != nil {
 						return err
 					}
@@ -505,7 +456,7 @@ func main() {
 						return err
 					}
 
-					if err = cache.EncodeAll(f, rosa.Std.Load(p)); err != nil {
+					if err = pkg.NewIR().EncodeAll(f, rosa.Std.Load(p)); err != nil {
 						_ = f.Close()
 						return err
 					}
@@ -513,33 +464,68 @@ func main() {
 					return f.Close()
 
 				case flagEnter:
-					return cache.EnterExec(
+					return cm.Do(func(cache *pkg.Cache) error {
-						ctx,
+						return cache.EnterExec(
-						rosa.Std.Load(p),
+							ctx,
-						true, os.Stdin, os.Stdout, os.Stderr,
+							rosa.Std.Load(p),
-						rosa.AbsSystem.Append("bin", "mksh"),
+							true, os.Stdin, os.Stdout, os.Stderr,
-						"sh",
+							rosa.AbsSystem.Append("bin", "mksh"),
-					)
+							"sh",
+						)
+					})
+
+				case flagRemote:
+					var flags uint64
+					if flagNoReply {
+						flags |= remoteNoReply
+					}
+					a := rosa.Std.Load(p)
+					pathname, err := cureRemote(ctx, &addr, a, flags)
+					if !flagNoReply && err == nil {
+						log.Println(pathname)
+					}
+
+					if errors.Is(err, context.Canceled) {
+						cc, cancel := context.WithDeadline(context.Background(), daemonDeadline())
+						defer cancel()
+
+						if _err := cancelRemote(cc, &addr, a); _err != nil {
+							log.Println(err)
+						}
+					}
+
+					return err
 				}
 			},
-		).
+		).Flag(
-			Flag(
+			&flagDump,
-				&flagDump,
+			"dump", command.StringFlag(""),
-				"dump", command.StringFlag(""),
+			"Write IR to specified pathname and terminate",
-				"Write IR to specified pathname and terminate",
+		).Flag(
-			).
+			&flagExport,
-			Flag(
+			"export", command.StringFlag(""),
-				&flagExport,
+			"Export cured artifact to specified pathname",
-				"export", command.StringFlag(""),
+		).Flag(
-				"Export cured artifact to specified pathname",
+			&flagEnter,
-			).
+			"enter", command.BoolFlag(false),
-			Flag(
+			"Enter cure container with an interactive shell",
-				&flagEnter,
+		).Flag(
-				"enter", command.BoolFlag(false),
+			&flagRemote,
-				"Enter cure container with an interactive shell",
+			"daemon", command.BoolFlag(false),
-			)
+			"Cure artifact on the daemon",
+		).Flag(
+			&flagNoReply,
+			"no-reply", command.BoolFlag(false),
+			"Do not receive a reply from the daemon",
+		)
 	}
 
+	c.NewCommand(
+		"abort",
+		"Abort all pending cures on the daemon",
+		func([]string) error { return abortRemote(ctx, &addr) },
+	)
+
 	{
 		var (
 			flagNet     bool
@@ -551,7 +537,7 @@ func main() {
 			"shell",
 			"Interactive shell in the specified Rosa OS environment",
 			func(args []string) error {
-				presets := make([]rosa.PArtifact, len(args))
+				presets := make([]rosa.PArtifact, len(args)+3)
 				for i, arg := range args {
 					p, ok := rosa.ResolveName(arg)
 					if !ok {
@@ -559,21 +545,24 @@ func main() {
 					}
 					presets[i] = p
 				}
+
+				base := rosa.Clang
+				if !flagWithToolchain {
+					base = rosa.Musl
+				}
+				presets = append(presets,
+					base,
+					rosa.Mksh,
+					rosa.Toybox,
+				)
+
 				root := make(pkg.Collect, 0, 6+len(args))
 				root = rosa.Std.AppendPresets(root, presets...)
 
-				if flagWithToolchain {
+				if err := cm.Do(func(cache *pkg.Cache) error {
-					musl, compilerRT, runtimes, clang := (rosa.Std - 1).NewLLVM()
+					_, _, err := cache.Cure(&root)
-					root = append(root, musl, compilerRT, runtimes, clang)
+					return err
-				} else {
+				}); err == nil {
-					root = append(root, rosa.Std.Load(rosa.Musl))
-				}
-				root = append(root,
-					rosa.Std.Load(rosa.Mksh),
-					rosa.Std.Load(rosa.Toybox),
-				)
-
-				if _, _, err := cache.Cure(&root); err == nil {
 					return errors.New("unreachable")
 				} else if !pkg.IsCollected(err) {
 					return err
@@ -585,11 +574,22 @@ func main() {
 				}
 				cured := make(map[pkg.Artifact]cureRes)
 				for _, a := range root {
-					pathname, checksum, err := cache.Cure(a)
+					if err := cm.Do(func(cache *pkg.Cache) error {
-					if err != nil {
+						pathname, checksum, err := cache.Cure(a)
+						if err == nil {
+							cured[a] = cureRes{pathname, checksum}
+						}
+						return err
+					}); err != nil {
+						return err
+					}
+				}
+
+				// explicitly open for direct error-free use from this point
+				if cm.c == nil {
+					if err := cm.open(); err != nil {
 						return err
 					}
-					cured[a] = cureRes{pathname, checksum}
 				}
 
 				layers := pkg.PromoteLayers(root, func(a pkg.Artifact) (
@@ -599,7 +599,7 @@ func main() {
 					res := cured[a]
 					return res.pathname, res.checksum
 				}, func(i int, d pkg.Artifact) {
-					r := pkg.Encode(cache.Ident(d).Value())
+					r := pkg.Encode(cm.c.Ident(d).Value())
 					if s, ok := d.(fmt.Stringer); ok {
 						if name := s.String(); name != "" {
 							r += "-" + name
@@ -663,22 +663,19 @@ func main() {
 				}
 				return z.Wait()
 			},
-		).
+		).Flag(
-			Flag(
+			&flagNet,
-				&flagNet,
+			"net", command.BoolFlag(false),
-				"net", command.BoolFlag(false),
+			"Share host net namespace",
-				"Share host net namespace",
+		).Flag(
-			).
+			&flagSession,
-			Flag(
+			"session", command.BoolFlag(true),
-				&flagSession,
+			"Retain session",
-				"session", command.BoolFlag(true),
+		).Flag(
-				"Retain session",
+			&flagWithToolchain,
-			).
+			"with-toolchain", command.BoolFlag(false),
-			Flag(
+			"Include the stage2 LLVM toolchain",
-				&flagWithToolchain,
+		)
-				"with-toolchain", command.BoolFlag(false),
-				"Include the stage2 LLVM toolchain",
-			)
 
 	}
 
@@ -689,9 +686,7 @@ func main() {
 	)
 
 	c.MustParse(os.Args[1:], func(err error) {
-		if cache != nil {
+		cm.Close()
-			cache.Close()
-		}
 		if w, ok := err.(interface{ Unwrap() []error }); !ok {
 			log.Fatal(err)
 		} else {

internal/pkg/exec.go

@@ -27,6 +27,11 @@ import (
 // AbsWork is the container pathname [TContext.GetWorkDir] is mounted on.
 var AbsWork = fhs.AbsRoot.Append("work/")
 
+// EnvJobs is the name of the environment variable holding a decimal
+// representation of the preferred job count. Its value must not affect cure
+// outcome.
+const EnvJobs = "CURE_JOBS"
+
 // ExecPath is a slice of [Artifact] and the [check.Absolute] pathname to make
 // it available at under in the container.
 type ExecPath struct {
@@ -397,7 +402,7 @@ const SeccompPresets = std.PresetStrict &
 func (a *execArtifact) makeContainer(
 	ctx context.Context,
 	msg message.Msg,
-	flags int,
+	flags, jobs int,
 	hostNet bool,
 	temp, work *check.Absolute,
 	getArtifact GetArtifactFunc,
@@ -432,8 +437,8 @@ func (a *execArtifact) makeContainer(
 		z.Hostname = "cure-net"
 	}
 	z.Uid, z.Gid = (1<<10)-1, (1<<10)-1
-
+	z.Dir, z.Path, z.Args = a.dir, a.path, a.args
-	z.Dir, z.Env, z.Path, z.Args = a.dir, a.env, a.path, a.args
+	z.Env = slices.Concat(a.env, []string{EnvJobs + "=" + strconv.Itoa(jobs)})
 	z.Grow(len(a.paths) + 4)
 
 	for i, b := range a.paths {
@@ -563,6 +568,7 @@ func (c *Cache) EnterExec(
 	z, err = e.makeContainer(
 		ctx, c.msg,
 		c.flags,
+		c.jobs,
 		hostNet,
 		temp, work,
 		func(a Artifact) (*check.Absolute, unique.Handle[Checksum]) {
@@ -602,7 +608,7 @@ func (a *execArtifact) cure(f *FContext, hostNet bool) (err error) {
 	msg := f.GetMessage()
 	var z *container.Container
 	if z, err = a.makeContainer(
-		ctx, msg, f.cache.flags, hostNet,
+		ctx, msg, f.cache.flags, f.GetJobs(), hostNet,
 		f.GetTempDir(), f.GetWorkDir(),
 		f.GetArtifact,
 		f.cache.Ident,

internal/pkg/ir.go

@@ -3,7 +3,6 @@ package pkg
 import (
 	"bufio"
 	"bytes"
-	"context"
 	"crypto/sha512"
 	"encoding/binary"
 	"errors"
@@ -11,6 +10,7 @@ import (
 	"io"
 	"slices"
 	"strconv"
+	"sync"
 	"syscall"
 	"unique"
 	"unsafe"
@@ -39,22 +39,45 @@ func panicToError(errP *error) {
 	}
 }
 
+// irCache implements [IRCache].
+type irCache struct {
+	// Artifact to [unique.Handle] of identifier cache.
+	artifact sync.Map
+	// Identifier free list, must not be accessed directly.
+	identPool sync.Pool
+}
+
+// zeroIRCache returns the initialised value of irCache.
+func zeroIRCache() irCache {
+	return irCache{
+		identPool: sync.Pool{New: func() any { return new(extIdent) }},
+	}
+}
+
+// IRCache provides memory management and caching primitives for IR and
+// identifier operations against [Artifact] implementations.
+//
+// The zero value is not safe for use.
+type IRCache struct{ irCache }
+
+// NewIR returns the address of a new [IRCache].
+func NewIR() *IRCache {
+	return &IRCache{zeroIRCache()}
+}
+
 // IContext is passed to [Artifact.Params] and provides methods for writing
 // values to the IR writer. It does not expose the underlying [io.Writer].
 //
 // IContext is valid until [Artifact.Params] returns.
 type IContext struct {
-	// Address of underlying [Cache], should be zeroed or made unusable after
+	// Address of underlying irCache, should be zeroed or made unusable after
 	// [Artifact.Params] returns and must not be exposed directly.
-	cache *Cache
+	ic *irCache
 	// Written to by various methods, should be zeroed after [Artifact.Params]
 	// returns and must not be exposed directly.
 	w io.Writer
 }
 
-// Unwrap returns the underlying [context.Context].
-func (i *IContext) Unwrap() context.Context { return i.cache.ctx }
-
 // irZero is a zero IR word.
 var irZero [wordSize]byte
 
@@ -136,11 +159,11 @@ func (i *IContext) mustWrite(p []byte) {
 // WriteIdent is not defined for an [Artifact] not part of the slice returned by
 // [Artifact.Dependencies].
 func (i *IContext) WriteIdent(a Artifact) {
-	buf := i.cache.getIdentBuf()
+	buf := i.ic.getIdentBuf()
-	defer i.cache.putIdentBuf(buf)
+	defer i.ic.putIdentBuf(buf)
 
 	IRKindIdent.encodeHeader(0).put(buf[:])
-	*(*ID)(buf[wordSize:]) = i.cache.Ident(a).Value()
+	*(*ID)(buf[wordSize:]) = i.ic.Ident(a).Value()
 	i.mustWrite(buf[:])
 }
 
@@ -183,19 +206,19 @@ func (i *IContext) WriteString(s string) {
 
 // Encode writes a deterministic, efficient representation of a to w and returns
 // the first non-nil error encountered while writing to w.
-func (c *Cache) Encode(w io.Writer, a Artifact) (err error) {
+func (ic *irCache) Encode(w io.Writer, a Artifact) (err error) {
 	deps := a.Dependencies()
 	idents := make([]*extIdent, len(deps))
 	for i, d := range deps {
-		dbuf, did := c.unsafeIdent(d, true)
+		dbuf, did := ic.unsafeIdent(d, true)
 		if dbuf == nil {
-			dbuf = c.getIdentBuf()
+			dbuf = ic.getIdentBuf()
 			binary.LittleEndian.PutUint64(dbuf[:], uint64(d.Kind()))
 			*(*ID)(dbuf[wordSize:]) = did.Value()
 		} else {
-			c.storeIdent(d, dbuf)
+			ic.storeIdent(d, dbuf)
 		}
-		defer c.putIdentBuf(dbuf)
+		defer ic.putIdentBuf(dbuf)
 		idents[i] = dbuf
 	}
 	slices.SortFunc(idents, func(a, b *extIdent) int {
@@ -221,10 +244,10 @@ func (c *Cache) Encode(w io.Writer, a Artifact) (err error) {
 	}
 
 	func() {
-		i := IContext{c, w}
+		i := IContext{ic, w}
 
 		defer panicToError(&err)
-		defer func() { i.cache, i.w = nil, nil }()
+		defer func() { i.ic, i.w = nil, nil }()
 
 		a.Params(&i)
 	}()
@@ -233,7 +256,7 @@ func (c *Cache) Encode(w io.Writer, a Artifact) (err error) {
 	}
 
 	var f IREndFlag
-	kcBuf := c.getIdentBuf()
+	kcBuf := ic.getIdentBuf()
 	sz := wordSize
 	if kc, ok := a.(KnownChecksum); ok {
 		f |= IREndKnownChecksum
@@ -243,13 +266,13 @@ func (c *Cache) Encode(w io.Writer, a Artifact) (err error) {
 	IRKindEnd.encodeHeader(uint32(f)).put(kcBuf[:])
 
 	_, err = w.Write(kcBuf[:sz])
-	c.putIdentBuf(kcBuf)
+	ic.putIdentBuf(kcBuf)
 	return
 }
 
 // encodeAll implements EncodeAll by recursively encoding dependencies and
 // performs deduplication by value via the encoded map.
-func (c *Cache) encodeAll(
+func (ic *irCache) encodeAll(
 	w io.Writer,
 	a Artifact,
 	encoded map[Artifact]struct{},
@@ -259,13 +282,13 @@ func (c *Cache) encodeAll(
 	}
 
 	for _, d := range a.Dependencies() {
-		if err = c.encodeAll(w, d, encoded); err != nil {
+		if err = ic.encodeAll(w, d, encoded); err != nil {
 			return
 		}
 	}
 
 	encoded[a] = struct{}{}
-	return c.Encode(w, a)
+	return ic.Encode(w, a)
 }
 
 // EncodeAll writes a self-describing IR stream of a to w and returns the first
@@ -283,8 +306,8 @@ func (c *Cache) encodeAll(
 // the ident cache, nor does it contribute identifiers it computes back to the
 // ident cache. Because of this, multiple invocations of EncodeAll will have
 // similar cost and does not amortise when combined with a call to Cure.
-func (c *Cache) EncodeAll(w io.Writer, a Artifact) error {
+func (ic *irCache) EncodeAll(w io.Writer, a Artifact) error {
-	return c.encodeAll(w, a, make(map[Artifact]struct{}))
+	return ic.encodeAll(w, a, make(map[Artifact]struct{}))
 }
 
 // ErrRemainingIR is returned for a [IRReadFunc] that failed to call

internal/pkg/net_test.go

@@ -8,7 +8,6 @@ import (
 	"testing"
 	"testing/fstest"
 	"unique"
-	"unsafe"
 
 	"hakurei.app/check"
 	"hakurei.app/internal/pkg"
@@ -33,20 +32,14 @@ func TestHTTPGet(t *testing.T) {
 
 	checkWithCache(t, []cacheTestCase{
 		{"direct", pkg.CValidateKnown, nil, func(t *testing.T, base *check.Absolute, c *pkg.Cache) {
-			var r pkg.RContext
+			r := newRContext(t, c)
-			rCacheVal := reflect.ValueOf(&r).Elem().FieldByName("cache")
-			reflect.NewAt(
-				rCacheVal.Type(),
-				unsafe.Pointer(rCacheVal.UnsafeAddr()),
-			).Elem().Set(reflect.ValueOf(c))
-
 			f := pkg.NewHTTPGet(
 				&client,
 				"file:///testdata",
 				testdataChecksum.Value(),
 			)
 			var got []byte
-			if rc, err := f.Cure(&r); err != nil {
+			if rc, err := f.Cure(r); err != nil {
 				t.Fatalf("Cure: error = %v", err)
 			} else if got, err = io.ReadAll(rc); err != nil {
 				t.Fatalf("ReadAll: error = %v", err)
@@ -65,7 +58,7 @@ func TestHTTPGet(t *testing.T) {
 			wantErrMismatch := &pkg.ChecksumMismatchError{
 				Got: testdataChecksum.Value(),
 			}
-			if rc, err := f.Cure(&r); err != nil {
+			if rc, err := f.Cure(r); err != nil {
 				t.Fatalf("Cure: error = %v", err)
 			} else if got, err = io.ReadAll(rc); err != nil {
 				t.Fatalf("ReadAll: error = %v", err)
@@ -76,7 +69,7 @@ func TestHTTPGet(t *testing.T) {
 			}
 
 			// check fallback validation
-			if rc, err := f.Cure(&r); err != nil {
+			if rc, err := f.Cure(r); err != nil {
 				t.Fatalf("Cure: error = %v", err)
 			} else if err = rc.Close(); !reflect.DeepEqual(err, wantErrMismatch) {
 				t.Fatalf("Close: error = %#v, want %#v", err, wantErrMismatch)
@@ -89,18 +82,13 @@ func TestHTTPGet(t *testing.T) {
 				pkg.Checksum{},
 			)
 			wantErrNotFound := pkg.ResponseStatusError(http.StatusNotFound)
-			if _, err := f.Cure(&r); !reflect.DeepEqual(err, wantErrNotFound) {
+			if _, err := f.Cure(r); !reflect.DeepEqual(err, wantErrNotFound) {
 				t.Fatalf("Cure: error = %#v, want %#v", err, wantErrNotFound)
 			}
 		}, pkg.MustDecode("E4vEZKhCcL2gPZ2Tt59FS3lDng-d_2SKa2i5G_RbDfwGn6EemptFaGLPUDiOa94C")},
 
 		{"cure", pkg.CValidateKnown, nil, func(t *testing.T, base *check.Absolute, c *pkg.Cache) {
-			var r pkg.RContext
+			r := newRContext(t, c)
-			rCacheVal := reflect.ValueOf(&r).Elem().FieldByName("cache")
-			reflect.NewAt(
-				rCacheVal.Type(),
-				unsafe.Pointer(rCacheVal.UnsafeAddr()),
-			).Elem().Set(reflect.ValueOf(c))
 
 			f := pkg.NewHTTPGet(
 				&client,
@@ -120,7 +108,7 @@ func TestHTTPGet(t *testing.T) {
 			}
 
 			var got []byte
-			if rc, err := f.Cure(&r); err != nil {
+			if rc, err := f.Cure(r); err != nil {
 				t.Fatalf("Cure: error = %v", err)
 			} else if got, err = io.ReadAll(rc); err != nil {
 				t.Fatalf("ReadAll: error = %v", err)
@@ -136,7 +124,7 @@ func TestHTTPGet(t *testing.T) {
 				"file:///testdata",
 				testdataChecksum.Value(),
 			)
-			if rc, err := f.Cure(&r); err != nil {
+			if rc, err := f.Cure(r); err != nil {
 				t.Fatalf("Cure: error = %v", err)
 			} else if got, err = io.ReadAll(rc); err != nil {
 				t.Fatalf("ReadAll: error = %v", err)

internal/pkg/pkg.go

@@ -72,6 +72,10 @@ func MustDecode(s string) (checksum Checksum) {
 
 // common holds elements and receives methods shared between different contexts.
 type common struct {
+	// Context specific to this [Artifact]. The toplevel context in [Cache] must
+	// not be exposed directly.
+	ctx context.Context
+
 	// Address of underlying [Cache], should be zeroed or made unusable after
 	// Cure returns and must not be exposed directly.
 	cache *Cache
@@ -183,11 +187,15 @@ func (t *TContext) destroy(errP *error) {
 }
 
 // Unwrap returns the underlying [context.Context].
-func (c *common) Unwrap() context.Context { return c.cache.ctx }
+func (c *common) Unwrap() context.Context { return c.ctx }
 
 // GetMessage returns [message.Msg] held by the underlying [Cache].
 func (c *common) GetMessage() message.Msg { return c.cache.msg }
 
+// GetJobs returns the preferred number of jobs to run, when applicable. Its
+// value must not affect cure outcome.
+func (c *common) GetJobs() int { return c.cache.jobs }
+
 // GetWorkDir returns a pathname to a directory which [Artifact] is expected to
 // write its output to. This is not the final resting place of the [Artifact]
 // and this pathname should not be directly referred to in the final contents.
@@ -207,11 +215,11 @@ func (t *TContext) GetTempDir() *check.Absolute { return t.temp }
 // [ChecksumMismatchError], or the underlying implementation may block on Close.
 func (c *common) Open(a Artifact) (r io.ReadCloser, err error) {
 	if f, ok := a.(FileArtifact); ok {
-		return c.cache.openFile(f)
+		return c.cache.openFile(c.ctx, f)
 	}
 
 	var pathname *check.Absolute
-	if pathname, _, err = c.cache.Cure(a); err != nil {
+	if pathname, _, err = c.cache.cure(a, true); err != nil {
 		return
 	}
 
@@ -372,6 +380,9 @@ type KnownChecksum interface {
 }
 
 // FileArtifact refers to an [Artifact] backed by a single file.
+//
+// FileArtifact does not support fine-grained cancellation. Its context is
+// inherited from the first [TrivialArtifact] or [FloodArtifact] that opens it.
 type FileArtifact interface {
 	// Cure returns [io.ReadCloser] of the full contents of [FileArtifact]. If
 	// [FileArtifact] implements [KnownChecksum], Cure is responsible for
@@ -531,6 +542,30 @@ const (
 	CHostAbstract
 )
 
+// toplevel holds [context.WithCancel] over caller-supplied context, where all
+// [Artifact] context are derived from.
+type toplevel struct {
+	ctx    context.Context
+	cancel context.CancelFunc
+}
+
+// newToplevel returns the address of a new toplevel via ctx.
+func newToplevel(ctx context.Context) *toplevel {
+	var t toplevel
+	t.ctx, t.cancel = context.WithCancel(ctx)
+	return &t
+}
+
+// pendingCure provides synchronisation and cancellation for pending cures.
+type pendingCure struct {
+	// Closed on cure completion.
+	done <-chan struct{}
+	// Error outcome, safe to access after done is closed.
+	err error
+	// Cancels the corresponding cure.
+	cancel context.CancelFunc
+}
+
 // Cache is a support layer that implementations of [Artifact] can use to store
 // cured [Artifact] data in a content addressed fashion.
 type Cache struct {
@@ -538,11 +573,10 @@ type Cache struct {
 	// implementation and receives an equal amount of elements after.
 	cures chan struct{}
 
-	// [context.WithCancel] over caller-supplied context, used by [Artifact] and
+	// Parent context which toplevel was derived from.
-	// all dependency curing goroutines.
+	parent context.Context
-	ctx context.Context
+	// For deriving curing context, must not be accessed directly.
-	// Cancels ctx.
+	toplevel atomic.Pointer[toplevel]
-	cancel context.CancelFunc
 	// For waiting on dependency curing goroutines.
 	wg sync.WaitGroup
 	// Reports new cures and passed to [Artifact].
@@ -552,11 +586,11 @@ type Cache struct {
 	base *check.Absolute
 	// Immutable cure options set by [Open].
 	flags int
+	// Immutable job count, when applicable.
+	jobs int
 
-	// Artifact to [unique.Handle] of identifier cache.
+	// Must not be exposed directly.
-	artifact sync.Map
+	irCache
-	// Identifier free list, must not be accessed directly.
-	identPool sync.Pool
 
 	// Synchronises access to dirChecksum.
 	checksumMu sync.RWMutex
@@ -566,9 +600,11 @@ type Cache struct {
 	// Identifier to error pair for unrecoverably faulted [Artifact].
 	identErr map[unique.Handle[ID]]error
 	// Pending identifiers, accessed through Cure for entries not in ident.
-	identPending map[unique.Handle[ID]]<-chan struct{}
+	identPending map[unique.Handle[ID]]*pendingCure
 	// Synchronises access to ident and corresponding filesystem entries.
 	identMu sync.RWMutex
+	// Synchronises entry into Abort and Cure.
+	abortMu sync.RWMutex
 
 	// Synchronises entry into exclusive artifacts for the cure method.
 	exclMu sync.Mutex
@@ -577,8 +613,10 @@ type Cache struct {
 
 	// Unlocks the on-filesystem cache. Must only be called from Close.
 	unlock func()
-	// Synchronises calls to Close.
+	// Whether [Cache] is considered closed.
-	closeOnce sync.Once
+	closed bool
+	// Synchronises calls to Abort and Close.
+	closeMu sync.Mutex
 
 	// Whether EnterExec has not yet returned.
 	inExec atomic.Bool
@@ -588,24 +626,24 @@ type Cache struct {
 type extIdent [wordSize + len(ID{})]byte
 
 // getIdentBuf returns the address of an extIdent for Ident.
-func (c *Cache) getIdentBuf() *extIdent { return c.identPool.Get().(*extIdent) }
+func (ic *irCache) getIdentBuf() *extIdent { return ic.identPool.Get().(*extIdent) }
 
 // putIdentBuf adds buf to identPool.
-func (c *Cache) putIdentBuf(buf *extIdent) { c.identPool.Put(buf) }
+func (ic *irCache) putIdentBuf(buf *extIdent) { ic.identPool.Put(buf) }
 
 // storeIdent adds an [Artifact] to the artifact cache.
-func (c *Cache) storeIdent(a Artifact, buf *extIdent) unique.Handle[ID] {
+func (ic *irCache) storeIdent(a Artifact, buf *extIdent) unique.Handle[ID] {
 	idu := unique.Make(ID(buf[wordSize:]))
-	c.artifact.Store(a, idu)
+	ic.artifact.Store(a, idu)
 	return idu
 }
 
 // Ident returns the identifier of an [Artifact].
-func (c *Cache) Ident(a Artifact) unique.Handle[ID] {
+func (ic *irCache) Ident(a Artifact) unique.Handle[ID] {
-	buf, idu := c.unsafeIdent(a, false)
+	buf, idu := ic.unsafeIdent(a, false)
 	if buf != nil {
-		idu = c.storeIdent(a, buf)
+		idu = ic.storeIdent(a, buf)
-		c.putIdentBuf(buf)
+		ic.putIdentBuf(buf)
 	}
 	return idu
 }
@@ -613,17 +651,17 @@ func (c *Cache) Ident(a Artifact) unique.Handle[ID] {
 // unsafeIdent implements Ident but returns the underlying buffer for a newly
 // computed identifier. Callers must return this buffer to identPool. encodeKind
 // is only a hint, kind may still be encoded in the buffer.
-func (c *Cache) unsafeIdent(a Artifact, encodeKind bool) (
+func (ic *irCache) unsafeIdent(a Artifact, encodeKind bool) (
 	buf *extIdent,
 	idu unique.Handle[ID],
 ) {
-	if id, ok := c.artifact.Load(a); ok {
+	if id, ok := ic.artifact.Load(a); ok {
 		idu = id.(unique.Handle[ID])
 		return
 	}
 
 	if ki, ok := a.(KnownIdent); ok {
-		buf = c.getIdentBuf()
+		buf = ic.getIdentBuf()
 		if encodeKind {
 			binary.LittleEndian.PutUint64(buf[:], uint64(a.Kind()))
 		}
@@ -631,9 +669,9 @@ func (c *Cache) unsafeIdent(a Artifact, encodeKind bool) (
 		return
 	}
 
-	buf = c.getIdentBuf()
+	buf = ic.getIdentBuf()
 	h := sha512.New384()
-	if err := c.Encode(h, a); err != nil {
+	if err := ic.Encode(h, a); err != nil {
 		// unreachable
 		panic(err)
 	}
@@ -1002,7 +1040,11 @@ func (c *Cache) Scrub(checks int) error {
 // loadOrStoreIdent attempts to load a cached [Artifact] by its identifier or
 // wait for a pending [Artifact] to cure. If neither is possible, the current
 // identifier is stored in identPending and a non-nil channel is returned.
+//
+// Since identErr is treated as grow-only, loadOrStoreIdent must not be entered
+// without holding a read lock on abortMu.
 func (c *Cache) loadOrStoreIdent(id unique.Handle[ID]) (
+	ctx context.Context,
 	done chan<- struct{},
 	checksum unique.Handle[Checksum],
 	err error,
@@ -1019,20 +1061,23 @@ func (c *Cache) loadOrStoreIdent(id unique.Handle[ID]) (
 		return
 	}
 
-	var notify <-chan struct{}
+	var pending *pendingCure
-	if notify, ok = c.identPending[id]; ok {
+	if pending, ok = c.identPending[id]; ok {
 		c.identMu.Unlock()
-		<-notify
+		<-pending.done
 		c.identMu.RLock()
 		if checksum, ok = c.ident[id]; !ok {
-			err = c.identErr[id]
+			err = pending.err
 		}
 		c.identMu.RUnlock()
 		return
 	}
 
 	d := make(chan struct{})
-	c.identPending[id] = d
+	pending = &pendingCure{done: d}
+	ctx, pending.cancel = context.WithCancel(c.toplevel.Load().ctx)
+	c.wg.Add(1)
+	c.identPending[id] = pending
 	c.identMu.Unlock()
 	done = d
 	return
@@ -1048,21 +1093,62 @@ func (c *Cache) finaliseIdent(
 ) {
 	c.identMu.Lock()
 	if err != nil {
+		c.identPending[id].err = err
 		c.identErr[id] = err
 	} else {
 		c.ident[id] = checksum
 	}
 	delete(c.identPending, id)
 	c.identMu.Unlock()
+	c.wg.Done()
 
 	close(done)
 }
 
+// Done returns a channel that is closed when the ongoing cure of an [Artifact]
+// referred to by the specified identifier completes. Done may return nil if
+// no ongoing cure of the specified identifier exists.
+func (c *Cache) Done(id unique.Handle[ID]) <-chan struct{} {
+	c.identMu.RLock()
+	pending, ok := c.identPending[id]
+	c.identMu.RUnlock()
+	if !ok || pending == nil {
+		return nil
+	}
+	return pending.done
+}
+
+// Cancel cancels the ongoing cure of an [Artifact] referred to by the specified
+// identifier. Cancel returns whether the [context.CancelFunc] has been killed.
+// Cancel returns after the cure is complete.
+func (c *Cache) Cancel(id unique.Handle[ID]) bool {
+	c.identMu.RLock()
+	pending, ok := c.identPending[id]
+	c.identMu.RUnlock()
+	if !ok || pending == nil || pending.cancel == nil {
+		return false
+	}
+	pending.cancel()
+	<-pending.done
+
+	c.abortMu.Lock()
+	c.identMu.Lock()
+	delete(c.identErr, id)
+	c.identMu.Unlock()
+	c.abortMu.Unlock()
+	return true
+}
+
 // openFile tries to load [FileArtifact] from [Cache], and if that fails,
 // obtains it via [FileArtifact.Cure] instead. Notably, it does not cure
 // [FileArtifact] to the filesystem. If err is nil, the caller is responsible
 // for closing the resulting [io.ReadCloser].
-func (c *Cache) openFile(f FileArtifact) (r io.ReadCloser, err error) {
+//
+// The context must originate from loadOrStoreIdent to enable cancellation.
+func (c *Cache) openFile(
+	ctx context.Context,
+	f FileArtifact,
+) (r io.ReadCloser, err error) {
 	if kc, ok := f.(KnownChecksum); c.flags&CAssumeChecksum != 0 && ok {
 		c.checksumMu.RLock()
 		r, err = os.Open(c.base.Append(
@@ -1093,7 +1179,7 @@ func (c *Cache) openFile(f FileArtifact) (r io.ReadCloser, err error) {
 				}
 			}()
 		}
-		return f.Cure(&RContext{common{c}})
+		return f.Cure(&RContext{common{ctx, c}})
 	}
 	return
 }
@@ -1241,12 +1327,11 @@ func (c *Cache) Cure(a Artifact) (
 	checksum unique.Handle[Checksum],
 	err error,
 ) {
-	select {
+	c.abortMu.RLock()
-	case <-c.ctx.Done():
+	defer c.abortMu.RUnlock()
-		err = c.ctx.Err()
-		return
 
-	default:
+	if err = c.toplevel.Load().ctx.Err(); err != nil {
+		return
 	}
 
 	return c.cure(a, true)
@@ -1332,15 +1417,16 @@ func (c *Cache) enterCure(a Artifact, curesExempt bool) error {
 		return nil
 	}
 
+	ctx := c.toplevel.Load().ctx
 	select {
 	case c.cures <- struct{}{}:
 		return nil
 
-	case <-c.ctx.Done():
+	case <-ctx.Done():
 		if a.IsExclusive() {
 			c.exclMu.Unlock()
 		}
-		return c.ctx.Err()
+		return ctx.Err()
 	}
 }
 
@@ -1438,7 +1524,8 @@ func (r *RContext) NewMeasuredReader(
 	return r.cache.newMeasuredReader(rc, checksum)
 }
 
-// cure implements Cure without checking the full dependency graph.
+// cure implements Cure without acquiring a read lock on abortMu. cure must not
+// be entered during Abort.
 func (c *Cache) cure(a Artifact, curesExempt bool) (
 	pathname *check.Absolute,
 	checksum unique.Handle[Checksum],
@@ -1457,8 +1544,11 @@ func (c *Cache) cure(a Artifact, curesExempt bool) (
 		}
 	}()
 
-	var done chan<- struct{}
+	var (
-	done, checksum, err = c.loadOrStoreIdent(id)
+		ctx  context.Context
+		done chan<- struct{}
+	)
+	ctx, done, checksum, err = c.loadOrStoreIdent(id)
 	if done == nil {
 		return
 	} else {
@@ -1571,7 +1661,7 @@ func (c *Cache) cure(a Artifact, curesExempt bool) (
 		if err = c.enterCure(a, curesExempt); err != nil {
 			return
 		}
-		r, err = f.Cure(&RContext{common{c}})
+		r, err = f.Cure(&RContext{common{ctx, c}})
 		if err == nil {
 			if checksumPathname == nil || c.flags&CValidateKnown != 0 {
 				h := sha512.New384()
@@ -1651,7 +1741,7 @@ func (c *Cache) cure(a Artifact, curesExempt bool) (
 		c.base.Append(dirWork, ids),
 		c.base.Append(dirTemp, ids),
 		ids, nil, nil, nil,
-		common{c},
+		common{ctx, c},
 	}
 	switch ca := a.(type) {
 	case TrivialArtifact:
@@ -1802,14 +1892,42 @@ func (c *Cache) OpenStatus(a Artifact) (r io.ReadSeekCloser, err error) {
 	return
 }
 
+// Abort cancels all pending cures and waits for them to clean up, but does not
+// close the cache.
+func (c *Cache) Abort() {
+	c.closeMu.Lock()
+	defer c.closeMu.Unlock()
+
+	if c.closed {
+		return
+	}
+
+	c.toplevel.Load().cancel()
+	c.abortMu.Lock()
+	defer c.abortMu.Unlock()
+
+	// holding abortMu, identPending stays empty
+	c.wg.Wait()
+	c.identMu.Lock()
+	c.toplevel.Store(newToplevel(c.parent))
+	clear(c.identErr)
+	c.identMu.Unlock()
+}
+
 // Close cancels all pending cures and waits for them to clean up.
 func (c *Cache) Close() {
-	c.closeOnce.Do(func() {
+	c.closeMu.Lock()
-		c.cancel()
+	defer c.closeMu.Unlock()
-		c.wg.Wait()
+
-		close(c.cures)
+	if c.closed {
-		c.unlock()
+		return
-	})
+	}
+
+	c.closed = true
+	c.toplevel.Load().cancel()
+	c.wg.Wait()
+	close(c.cures)
+	c.unlock()
 }
 
 // Open returns the address of a newly opened instance of [Cache].
@@ -1818,7 +1936,7 @@ func (c *Cache) Close() {
 // caller-supplied value, however direct calls to [Cache.Cure] is not subject
 // to this limitation.
 //
-// A cures value of 0 or lower is equivalent to the value returned by
+// A cures or jobs value of 0 or lower is equivalent to the value returned by
 // [runtime.NumCPU].
 //
 // A successful call to Open guarantees exclusive access to the on-filesystem
@@ -1828,10 +1946,10 @@ func (c *Cache) Close() {
 func Open(
 	ctx context.Context,
 	msg message.Msg,
-	flags, cures int,
+	flags, cures, jobs int,
 	base *check.Absolute,
 ) (*Cache, error) {
-	return open(ctx, msg, flags, cures, base, true)
+	return open(ctx, msg, flags, cures, jobs, base, true)
 }
 
 // open implements Open but allows omitting the [lockedfile] lock when called
@@ -1839,13 +1957,16 @@ func Open(
 func open(
 	ctx context.Context,
 	msg message.Msg,
-	flags, cures int,
+	flags, cures, jobs int,
 	base *check.Absolute,
 	lock bool,
 ) (*Cache, error) {
 	if cures < 1 {
 		cures = runtime.NumCPU()
 	}
+	if jobs < 1 {
+		jobs = runtime.NumCPU()
+	}
 
 	for _, name := range []string{
 		dirIdentifier,
@@ -1860,22 +1981,25 @@ func open(
 	}
 
 	c := Cache{
+		parent: ctx,
+
 		cures: make(chan struct{}, cures),
 		flags: flags,
+		jobs:  jobs,
 
 		msg:  msg,
 		base: base,
 
-		identPool: sync.Pool{New: func() any { return new(extIdent) }},
+		irCache: zeroIRCache(),
 
 		ident:        make(map[unique.Handle[ID]]unique.Handle[Checksum]),
 		identErr:     make(map[unique.Handle[ID]]error),
-		identPending: make(map[unique.Handle[ID]]<-chan struct{}),
+		identPending: make(map[unique.Handle[ID]]*pendingCure),
 
 		brPool: sync.Pool{New: func() any { return new(bufio.Reader) }},
 		bwPool: sync.Pool{New: func() any { return new(bufio.Writer) }},
 	}
-	c.ctx, c.cancel = context.WithCancel(ctx)
+	c.toplevel.Store(newToplevel(ctx))
 
 	if lock || !testing.Testing() {
 		if unlock, err := lockedfile.MutexAt(

internal/pkg/pkg_test.go

@@ -16,6 +16,7 @@ import (
 	"path/filepath"
 	"reflect"
 	"strconv"
+	"sync"
 	"syscall"
 	"testing"
 	"unique"
@@ -35,11 +36,28 @@ import (
 func unsafeOpen(
 	ctx context.Context,
 	msg message.Msg,
-	flags, cures int,
+	flags, cures, jobs int,
 	base *check.Absolute,
 	lock bool,
 ) (*pkg.Cache, error)
 
+// newRContext returns the address of a new [pkg.RContext] unsafely created for
+// the specified [testing.TB].
+func newRContext(tb testing.TB, c *pkg.Cache) *pkg.RContext {
+	var r pkg.RContext
+	rContextVal := reflect.ValueOf(&r).Elem().FieldByName("ctx")
+	reflect.NewAt(
+		rContextVal.Type(),
+		unsafe.Pointer(rContextVal.UnsafeAddr()),
+	).Elem().Set(reflect.ValueOf(tb.Context()))
+	rCacheVal := reflect.ValueOf(&r).Elem().FieldByName("cache")
+	reflect.NewAt(
+		rCacheVal.Type(),
+		unsafe.Pointer(rCacheVal.UnsafeAddr()),
+	).Elem().Set(reflect.ValueOf(c))
+	return &r
+}
+
 func TestMain(m *testing.M) { container.TryArgv0(nil); os.Exit(m.Run()) }
 
 // overrideIdent overrides the ID method of [Artifact].
@@ -230,7 +248,7 @@ func TestIdent(t *testing.T) {
 	var cache *pkg.Cache
 	if a, err := check.NewAbs(t.TempDir()); err != nil {
 		t.Fatal(err)
-	} else if cache, err = pkg.Open(t.Context(), msg, 0, 0, a); err != nil {
+	} else if cache, err = pkg.Open(t.Context(), msg, 0, 0, 0, a); err != nil {
 		t.Fatal(err)
 	}
 	t.Cleanup(cache.Close)
@@ -304,7 +322,7 @@ func checkWithCache(t *testing.T, testCases []cacheTestCase) {
 			}
 
 			var scrubFunc func() error // scrub after hashing
-			if c, err := pkg.Open(t.Context(), msg, flags, 1<<4, base); err != nil {
+			if c, err := pkg.Open(t.Context(), msg, flags, 1<<4, 0, base); err != nil {
 				t.Fatalf("Open: error = %v", err)
 			} else {
 				t.Cleanup(c.Close)
@@ -606,7 +624,7 @@ func TestCache(t *testing.T) {
 			if c0, err := unsafeOpen(
 				t.Context(),
 				message.New(nil),
-				0, 0, base, false,
+				0, 0, 0, base, false,
 			); err != nil {
 				t.Fatalf("open: error = %v", err)
 			} else {
@@ -876,17 +894,69 @@ func TestCache(t *testing.T) {
 				t.Fatalf("Scrub: error = %#v, want %#v", err, wantErrScrub)
 			}
 
-			identPendingVal := reflect.ValueOf(c).Elem().FieldByName("identPending")
+			notify := c.Done(unique.Make(pkg.ID{0xff}))
-			identPending := reflect.NewAt(
-				identPendingVal.Type(),
-				unsafe.Pointer(identPendingVal.UnsafeAddr()),
-			).Elem().Interface().(map[unique.Handle[pkg.ID]]<-chan struct{})
-			notify := identPending[unique.Make(pkg.ID{0xff})]
 			go close(n)
-			<-notify
+			if notify != nil {
+				<-notify
+			}
+			for c.Done(unique.Make(pkg.ID{0xff})) != nil {
+			}
 			<-wCureDone
 		}, pkg.MustDecode("E4vEZKhCcL2gPZ2Tt59FS3lDng-d_2SKa2i5G_RbDfwGn6EemptFaGLPUDiOa94C")},
 
+		{"cancel abort block", pkg.CValidateKnown, nil, func(t *testing.T, base *check.Absolute, c *pkg.Cache) {
+			var wg sync.WaitGroup
+			defer wg.Wait()
+
+			var started sync.WaitGroup
+			defer started.Wait()
+
+			blockCures := func(d byte, e stub.UniqueError, n int) {
+				started.Add(n)
+				for i := range n {
+					wg.Go(func() {
+						if _, _, err := c.Cure(overrideIdent{pkg.ID{d, byte(i)}, &stubArtifact{
+							kind: pkg.KindTar,
+							cure: func(t *pkg.TContext) error {
+								started.Done()
+								<-t.Unwrap().Done()
+								return e + stub.UniqueError(i)
+							},
+						}}); !reflect.DeepEqual(err, e+stub.UniqueError(i)) {
+							panic(err)
+						}
+					})
+				}
+				started.Wait()
+			}
+
+			blockCures(0xfd, 0xbad, 16)
+			c.Abort()
+			wg.Wait()
+
+			blockCures(0xfd, 0xcafe, 16)
+			c.Abort()
+			wg.Wait()
+
+			blockCures(0xff, 0xbad, 1)
+			if !c.Cancel(unique.Make(pkg.ID{0xff})) {
+				t.Fatal("missed cancellation")
+			}
+			wg.Wait()
+
+			blockCures(0xff, 0xcafe, 1)
+			if !c.Cancel(unique.Make(pkg.ID{0xff})) {
+				t.Fatal("missed cancellation")
+			}
+			wg.Wait()
+
+			for c.Cancel(unique.Make(pkg.ID{0xff})) {
+			}
+
+			c.Close()
+			c.Abort()
+		}, pkg.MustDecode("E4vEZKhCcL2gPZ2Tt59FS3lDng-d_2SKa2i5G_RbDfwGn6EemptFaGLPUDiOa94C")},
+
 		{"no assume checksum", 0, nil, func(t *testing.T, base *check.Absolute, c *pkg.Cache) {
 			makeGarbage := func(work *check.Absolute, wantErr error) error {
 				if err := os.Mkdir(work.String(), 0700); err != nil {
@@ -1263,7 +1333,7 @@ func TestNew(t *testing.T) {
 		if _, err := pkg.Open(
 			t.Context(),
 			message.New(nil),
-			0, 0, check.MustAbs(container.Nonexistent),
+			0, 0, 0, check.MustAbs(container.Nonexistent),
 		); !reflect.DeepEqual(err, wantErr) {
 			t.Errorf("Open: error = %#v, want %#v", err, wantErr)
 		}
@@ -1291,7 +1361,7 @@ func TestNew(t *testing.T) {
 		if _, err := pkg.Open(
 			t.Context(),
 			message.New(nil),
-			0, 0, tempDir.Append("cache"),
+			0, 0, 0, tempDir.Append("cache"),
 		); !reflect.DeepEqual(err, wantErr) {
 			t.Errorf("Open: error = %#v, want %#v", err, wantErr)
 		}

internal/pkg/tar.go

@@ -43,8 +43,7 @@ var _ fmt.Stringer = new(tarArtifactNamed)
 func (a *tarArtifactNamed) String() string { return a.name + "-unpack" }
 
 // NewTar returns a new [Artifact] backed by the supplied [Artifact] and
-// compression method. The source [Artifact] must be compatible with
+// compression method. The source [Artifact] must be a [FileArtifact].
-// [TContext.Open].
 func NewTar(a Artifact, compression uint32) Artifact {
 	ta := tarArtifact{a, compression}
 	if s, ok := a.(fmt.Stringer); ok {

internal/pkg/testdata/main.go

@@ -9,7 +9,9 @@ import (
 	"os"
 	"path/filepath"
 	"reflect"
+	"runtime"
 	"slices"
+	"strconv"
 	"strings"
 
 	"hakurei.app/check"
@@ -21,6 +23,10 @@ func main() {
 	log.SetFlags(0)
 	log.SetPrefix("testtool: ")
 
+	environ := slices.DeleteFunc(slices.Clone(os.Environ()), func(s string) bool {
+		return s == "CURE_JOBS="+strconv.Itoa(runtime.NumCPU())
+	})
+
 	var hostNet, layers, promote bool
 	if len(os.Args) == 2 && os.Args[0] == "testtool" {
 		switch os.Args[1] {
@@ -48,15 +54,15 @@ func main() {
 
 	var overlayRoot bool
 	wantEnv := []string{"HAKUREI_TEST=1"}
-	if len(os.Environ()) == 2 {
+	if len(environ) == 2 {
 		overlayRoot = true
 		if !layers && !promote {
 			log.SetPrefix("testtool(overlay root): ")
 		}
 		wantEnv = []string{"HAKUREI_TEST=1", "HAKUREI_ROOT=1"}
 	}
-	if !slices.Equal(wantEnv, os.Environ()) {
+	if !slices.Equal(wantEnv, environ) {
-		log.Fatalf("Environ: %q, want %q", os.Environ(), wantEnv)
+		log.Fatalf("Environ: %q, want %q", environ, wantEnv)
 	}
 
 	var overlayWork bool

internal/rosa/acl.go

@@ -7,10 +7,10 @@ func (t Toolchain) newAttr() (pkg.Artifact, string) {
 		version  = "2.5.2"
 		checksum = "YWEphrz6vg1sUMmHHVr1CRo53pFXRhq_pjN-AlG8UgwZK1y6m7zuDhxqJhD0SV0l"
 	)
-	return t.NewPackage("attr", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("attr", version, newTar(
-		nil, "https://download.savannah.nongnu.org/releases/attr/"+
+		"https://download.savannah.nongnu.org/releases/attr/"+
 			"attr-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		Patches: []KV{
@@ -81,10 +81,10 @@ func (t Toolchain) newACL() (pkg.Artifact, string) {
 		version  = "2.3.2"
 		checksum = "-fY5nwH4K8ZHBCRXrzLdguPkqjKI6WIiGu4dBtrZ1o0t6AIU73w8wwJz_UyjIS0P"
 	)
-	return t.NewPackage("acl", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("acl", version, newTar(
-		nil, "https://download.savannah.nongnu.org/releases/acl/"+
+		"https://download.savannah.nongnu.org/releases/acl/"+
 			"acl-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, &MakeHelper{
 		// makes assumptions about uid_map/gid_map

internal/rosa/all.go

@@ -16,9 +16,9 @@ import (
 type PArtifact int
 
 const (
-	LLVMCompilerRT PArtifact = iota
+	CompilerRT PArtifact = iota
 	LLVMRuntimes
-	LLVMClang
+	Clang
 
 	// EarlyInit is the Rosa OS init program.
 	EarlyInit
@@ -64,6 +64,7 @@ const (
 	GenInitCPIO
 	Gettext
 	Git
+	Glslang
 	GnuTLS
 	Go
 	Gperf
@@ -76,13 +77,17 @@ const (
 	LibXau
 	Libbsd
 	Libcap
+	Libclc
+	Libdrm
 	Libev
 	Libexpat
 	Libffi
 	Libgd
+	Libglvnd
 	Libiconv
 	Libmd
 	Libmnl
+	Libpciaccess
 	Libnftnl
 	Libpsl
 	Libseccomp
@@ -119,15 +124,18 @@ const (
 	PerlTermReadKey
 	PerlTextCharWidth
 	PerlTextWrapI18N
-	PerlUnicodeGCString
+	PerlUnicodeLineBreak
 	PerlYAMLTiny
 	PkgConfig
 	Procps
 	Python
 	PythonIniConfig
+	PythonMako
+	PythonMarkupSafe
 	PythonPackaging
 	PythonPluggy
 	PythonPyTest
+	PythonPyYAML
 	PythonPygments
 	QEMU
 	Rdfind
@@ -135,6 +143,8 @@ const (
 	Rsync
 	Sed
 	Setuptools
+	SPIRVHeaders
+	SPIRVTools
 	SquashfsTools
 	Strace
 	TamaGo
@@ -148,15 +158,17 @@ const (
 	WaylandProtocols
 	XCB
 	XCBProto
-	Xproto
+	XDGDBusProxy
 	XZ
+	Xproto
 	Zlib
 	Zstd
 
 	// PresetUnexportedStart is the first unexported preset.
 	PresetUnexportedStart
 
-	buildcatrust = iota - 1
+	llvmSource = iota - 1
+	buildcatrust
 	utilMacros
 
 	// Musl is a standalone libc that does not depend on the toolchain.

internal/rosa/argp-standalone.go

@@ -7,10 +7,10 @@ func (t Toolchain) newArgpStandalone() (pkg.Artifact, string) {
 		version  = "1.3"
 		checksum = "vtW0VyO2pJ-hPyYmDI2zwSLS8QL0sPAUKC1t3zNYbwN2TmsaE-fADhaVtNd3eNFl"
 	)
-	return t.NewPackage("argp-standalone", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("argp-standalone", version, newTar(
-		nil, "http://www.lysator.liu.se/~nisse/misc/"+
+		"http://www.lysator.liu.se/~nisse/misc/"+
 			"argp-standalone-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		Env: []string{

internal/rosa/bzip2.go

@@ -7,9 +7,9 @@ func (t Toolchain) newBzip2() (pkg.Artifact, string) {
 		version  = "1.0.8"
 		checksum = "cTLykcco7boom-s05H1JVsQi1AtChYL84nXkg_92Dm1Xt94Ob_qlMg_-NSguIK-c"
 	)
-	return t.NewPackage("bzip2", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("bzip2", version, newTar(
-		nil, "https://sourceware.org/pub/bzip2/bzip2-"+version+".tar.gz",
+		"https://sourceware.org/pub/bzip2/bzip2-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		Writable:    true,

internal/rosa/cmake.go

@@ -13,10 +13,11 @@ func (t Toolchain) newCMake() (pkg.Artifact, string) {
 		version  = "4.3.1"
 		checksum = "RHpzZiM1kJ5bwLjo9CpXSeHJJg3hTtV9QxBYpQoYwKFtRh5YhGWpShrqZCSOzQN6"
 	)
-	return t.NewPackage("cmake", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("cmake", version, newFromGitHubRelease(
-		nil, "https://github.com/Kitware/CMake/releases/download/"+
+		"Kitware/CMake",
-			"v"+version+"/cmake-"+version+".tar.gz",
+		"v"+version,
-		mustDecode(checksum),
+		"cmake-"+version+".tar.gz",
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		// test suite expects writable source tree
@@ -90,7 +91,7 @@ index 2ead810437..f85cbb8b1c 100644
 		ConfigureName: "/usr/src/cmake/bootstrap",
 		Configure: []KV{
 			{"prefix", "/system"},
-			{"parallel", `"$(nproc)"`},
+			{"parallel", jobsE},
 			{"--"},
 			{"-DCMAKE_USE_OPENSSL", "OFF"},
 			{"-DCMake_TEST_NO_NETWORK", "ON"},
@@ -118,9 +119,6 @@ func init() {
 
 // CMakeHelper is the [CMake] build system helper.
 type CMakeHelper struct {
-	// Joined with name with a dash if non-empty.
-	Variant string
-
 	// Path elements joined with source.
 	Append []string
 
@@ -135,14 +133,6 @@ type CMakeHelper struct {
 
 var _ Helper = new(CMakeHelper)
 
-// name returns its arguments and an optional variant string joined with '-'.
-func (attr *CMakeHelper) name(name, version string) string {
-	if attr != nil && attr.Variant != "" {
-		name += "-" + attr.Variant
-	}
-	return name + "-" + version
-}
-
 // extra returns a hardcoded slice of [CMake] and [Ninja].
 func (attr *CMakeHelper) extra(int) P {
 	if attr != nil && attr.Make {
@@ -180,10 +170,8 @@ func (attr *CMakeHelper) script(name string) string {
 	}
 
 	generate := "Ninja"
-	jobs := ""
 	if attr.Make {
 		generate = "'Unix Makefiles'"
-		jobs += ` "--parallel=$(nproc)"`
 	}
 
 	return `
@@ -201,7 +189,7 @@ cmake -G ` + generate + ` \
 	}), " \\\n\t") + ` \
 	-DCMAKE_INSTALL_PREFIX=/system \
 	'/usr/src/` + name + `/` + filepath.Join(attr.Append...) + `'
-cmake --build .` + jobs + `
+cmake --build . --parallel=` + jobsE + `
 cmake --install . --prefix=/work/system
 ` + attr.Script
 }

internal/rosa/connman.go

@@ -7,10 +7,10 @@ func (t Toolchain) newConnman() (pkg.Artifact, string) {
 		version  = "2.0"
 		checksum = "MhVTdJOhndnZn2SWd8URKo_Pj7Zvc14tntEbrVOf9L3yVWJvpb3v3Q6104tWJgtW"
 	)
-	return t.NewPackage("connman", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("connman", version, newTar(
-		nil, "https://git.kernel.org/pub/scm/network/connman/connman.git/"+
+		"https://git.kernel.org/pub/scm/network/connman/connman.git/"+
 			"snapshot/connman-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		Patches: []KV{

internal/rosa/curl.go

@@ -7,15 +7,15 @@ func (t Toolchain) newCurl() (pkg.Artifact, string) {
 		version  = "8.19.0"
 		checksum = "YHuVLVVp8q_Y7-JWpID5ReNjq2Zk6t7ArHB6ngQXilp_R5l3cubdxu3UKo-xDByv"
 	)
-	return t.NewPackage("curl", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("curl", version, newTar(
-		nil, "https://curl.se/download/curl-"+version+".tar.bz2",
+		"https://curl.se/download/curl-"+version+".tar.bz2",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarBzip2,
 	), &PackageAttr{
 		// remove broken test
 		Writable: true,
 		ScriptEarly: `
-chmod +w tests/data && rm tests/data/test459
+chmod +w tests/data && rm -f tests/data/test459
 `,
 	}, &MakeHelper{
 		Configure: []KV{
@@ -25,7 +25,7 @@ chmod +w tests/data && rm tests/data/test459
 			{"disable-smb"},
 		},
 		Check: []string{
-			`TFLAGS="-j$(expr "$(nproc)" '*' 2)"`,
+			"TFLAGS=" + jobsLFlagE,
 			"test-nonflaky",
 		},
 	},

internal/rosa/dbus.go

@@ -7,11 +7,11 @@ func (t Toolchain) newDBus() (pkg.Artifact, string) {
 		version  = "1.16.2"
 		checksum = "INwOuNdrDG7XW5ilW_vn8JSxEa444rRNc5ho97i84I1CNF09OmcFcV-gzbF4uCyg"
 	)
-	return t.NewPackage("dbus", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("dbus", version, newFromGitLab(
-		nil, "https://gitlab.freedesktop.org/dbus/dbus/-/archive/"+
+		"gitlab.freedesktop.org",
-			"dbus-"+version+"/dbus-dbus-"+version+".tar.bz2",
+		"dbus/dbus",
-		mustDecode(checksum),
+		"dbus-"+version,
-		pkg.TarBzip2,
+		checksum,
 	), &PackageAttr{
 		// OSError: [Errno 30] Read-only file system: '/usr/src/dbus/subprojects/packagecache'
 		Writable: true,
@@ -44,3 +44,38 @@ func init() {
 		ID: 5356,
 	}
 }
+
+func (t Toolchain) newXDGDBusProxy() (pkg.Artifact, string) {
+	const (
+		version  = "0.1.7"
+		checksum = "UW5Pe-TP-XAaN-kTbxrkOQ7eYdmlAQlr2pdreLtPT0uwdAz-7rzDP8V_8PWuZBup"
+	)
+	return t.NewPackage("xdg-dbus-proxy", version, newFromGitHub(
+		"flatpak/xdg-dbus-proxy",
+		version,
+		checksum,
+	), nil, &MesonHelper{
+		Setup: []KV{
+			{"Dman", "disabled"},
+		},
+	},
+		DBus,
+
+		GLib,
+	), version
+}
+func init() {
+	artifactsM[XDGDBusProxy] = Metadata{
+		f: Toolchain.newXDGDBusProxy,
+
+		Name:        "xdg-dbus-proxy",
+		Description: "a filtering proxy for D-Bus connections",
+		Website:     "https://github.com/flatpak/xdg-dbus-proxy",
+
+		Dependencies: P{
+			GLib,
+		},
+
+		ID: 58434,
+	}
+}

internal/rosa/dtc.go

@@ -7,10 +7,10 @@ func (t Toolchain) newDTC() (pkg.Artifact, string) {
 		version  = "1.7.2"
 		checksum = "vUoiRynPyYRexTpS6USweT5p4SVHvvVJs8uqFkkVD-YnFjwf6v3elQ0-Etrh00Dt"
 	)
-	return t.NewPackage("dtc", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("dtc", version, newTar(
-		nil, "https://git.kernel.org/pub/scm/utils/dtc/dtc.git/snapshot/"+
+		"https://git.kernel.org/pub/scm/utils/dtc/dtc.git/snapshot/"+
 			"dtc-v"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		// works around buggy test:

internal/rosa/elfutils.go

@@ -4,13 +4,13 @@ import "hakurei.app/internal/pkg"
 
 func (t Toolchain) newElfutils() (pkg.Artifact, string) {
 	const (
-		version  = "0.194"
+		version  = "0.195"
-		checksum = "Q3XUygUPv9vR1TkWucwUsQ8Kb1_F6gzk-KMPELr3cC_4AcTrprhVPMvN0CKkiYRa"
+		checksum = "JrGnBD38w8Mj0ZxDw3fKlRBFcLvRKu8rcYnX35R9yTlUSYnzTazyLboG-a2CsJlu"
 	)
-	return t.NewPackage("elfutils", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("elfutils", version, newTar(
-		nil, "https://sourceware.org/elfutils/ftp/"+
+		"https://sourceware.org/elfutils/ftp/"+
 			version+"/elfutils-"+version+".tar.bz2",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarBzip2,
 	), &PackageAttr{
 		Env: []string{

internal/rosa/etc.go

@@ -135,10 +135,11 @@ func newIANAEtc() pkg.Artifact {
 		version  = "20251215"
 		checksum = "kvKz0gW_rGG5QaNK9ZWmWu1IEgYAdmhj_wR7DYrh3axDfIql_clGRHmelP7525NJ"
 	)
-	return pkg.NewHTTPGetTar(
+	return newFromGitHubRelease(
-		nil, "https://github.com/Mic92/iana-etc/releases/download/"+
+		"Mic92/iana-etc",
-			version+"/iana-etc-"+version+".tar.gz",
+		version,
-		mustDecode(checksum),
+		"iana-etc-"+version+".tar.gz",
+		checksum,
 		pkg.TarGzip,
 	)
 }

internal/rosa/fakeroot.go

@@ -7,11 +7,11 @@ func (t Toolchain) newFakeroot() (pkg.Artifact, string) {
 		version  = "1.37.2"
 		checksum = "4ve-eDqVspzQ6VWDhPS0NjW3aSenBJcPAJq_BFT7OOFgUdrQzoTBxZWipDAGWxF8"
 	)
-	return t.NewPackage("fakeroot", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("fakeroot", version, newFromGitLab(
-		nil, "https://salsa.debian.org/clint/fakeroot/-/archive/upstream/"+
+		"salsa.debian.org",
-			version+"/fakeroot-upstream-"+version+".tar.bz2",
+		"clint/fakeroot",
-		mustDecode(checksum),
+		"upstream/"+version,
-		pkg.TarBzip2,
+		checksum,
 	), &PackageAttr{
 		Patches: []KV{
 			{"remove-broken-docs", `diff --git a/doc/Makefile.am b/doc/Makefile.am

internal/rosa/flex.go

@@ -9,10 +9,11 @@ func (t Toolchain) newFlex() (pkg.Artifact, string) {
 		version  = "2.6.4"
 		checksum = "p9POjQU7VhgOf3x5iFro8fjhy0NOanvA7CTeuWS_veSNgCixIJshTrWVkc5XLZkB"
 	)
-	return t.NewPackage("flex", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("flex", version, newFromGitHubRelease(
-		nil, "https://github.com/westes/flex/releases/download/"+
+		"westes/flex",
-			"v"+version+"/flex-"+version+".tar.gz",
+		"v"+version,
-		mustDecode(checksum),
+		"flex-"+version+".tar.gz",
+		checksum,
 		pkg.TarGzip,
 	), nil, (*MakeHelper)(nil),
 		M4,

internal/rosa/fuse.go

@@ -7,10 +7,11 @@ func (t Toolchain) newFuse() (pkg.Artifact, string) {
 		version  = "3.18.2"
 		checksum = "iL-7b7eUtmlVSf5cSq0dzow3UiqSjBmzV3cI_ENPs1tXcHdktkG45j1V12h-4jZe"
 	)
-	return t.NewPackage("fuse", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("fuse", version, newFromGitHubRelease(
-		nil, "https://github.com/libfuse/libfuse/releases/download/"+
+		"libfuse/libfuse",
-			"fuse-"+version+"/fuse-"+version+".tar.gz",
+		"fuse-"+version,
-		mustDecode(checksum),
+		"fuse-"+version+".tar.gz",
+		checksum,
 		pkg.TarGzip,
 	), nil, &MesonHelper{
 		Setup: []KV{

internal/rosa/git.go

@@ -12,10 +12,10 @@ func (t Toolchain) newGit() (pkg.Artifact, string) {
 		version  = "2.53.0"
 		checksum = "rlqSTeNgSeVKJA7nvzGqddFH8q3eFEPB4qRZft-4zth8wTHnbTbm7J90kp_obHGm"
 	)
-	return t.NewPackage("git", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("git", version, newTar(
-		nil, "https://www.kernel.org/pub/software/scm/git/"+
+		"https://www.kernel.org/pub/software/scm/git/"+
 			"git-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		ScriptEarly: `
@@ -58,7 +58,7 @@ disable_test t2200-add-update
 			"prove",
 		},
 		Install: `make \
-	"-j$(nproc)" \
+	` + jobsFlagE + ` \
 	DESTDIR=/work \
 	NO_INSTALL_HARDLINKS=1 \
 	install`,
@@ -114,3 +114,8 @@ git \
 rm -rf /work/.git
 `, resolvconf())
 }
+
+// newTagRemote is a helper around NewViaGit for a tag on a git remote.
+func (t Toolchain) newTagRemote(url, tag, checksum string) pkg.Artifact {
+	return t.NewViaGit(url, "refs/tags/"+tag, mustDecode(checksum))
+}

internal/rosa/glslang.go

@@ -0,0 +1,130 @@
+package rosa
+
+import (
+	"slices"
+	"strings"
+
+	"hakurei.app/internal/pkg"
+)
+
+func (t Toolchain) newSPIRVHeaders() (pkg.Artifact, string) {
+	const (
+		version  = "1.4.341.0"
+		checksum = "0PL43-19Iaw4k7_D8J8BvoJ-iLgCVSYZ2ThgDPGfAJwIJFtre7l0cnQtLjcY-JvD"
+	)
+	return t.NewPackage("spirv-headers", version, newFromGitHub(
+		"KhronosGroup/SPIRV-Headers",
+		"vulkan-sdk-"+version,
+		checksum,
+	), nil, &CMakeHelper{
+		Cache: []KV{
+			{"CMAKE_BUILD_TYPE", "Release"},
+		},
+	}), version
+}
+func init() {
+	artifactsM[SPIRVHeaders] = Metadata{
+		f: Toolchain.newSPIRVHeaders,
+
+		Name:        "spirv-headers",
+		Description: "machine-readable files for the SPIR-V Registry",
+		Website:     "https://github.com/KhronosGroup/SPIRV-Headers",
+
+		ID: 230542,
+
+		// upstream changed version scheme, anitya incapable of filtering them
+		latest: func(v *Versions) string {
+			for _, s := range v.Stable {
+				fields := strings.SplitN(s, ".", 4)
+				if len(fields) != 4 {
+					continue
+				}
+				if slices.ContainsFunc(fields, func(f string) bool {
+					return slices.ContainsFunc([]byte(f), func(d byte) bool {
+						return d < '0' || d > '9'
+					})
+				}) {
+					continue
+				}
+				return s
+			}
+			return v.Latest
+		},
+	}
+}
+
+func (t Toolchain) newSPIRVTools() (pkg.Artifact, string) {
+	const (
+		version  = "2026.1"
+		checksum = "ZSQPQx8NltCDzQLk4qlaVxyWRWeI_JtsjEpeFt3kezTanl9DTHfLixSUCezMFBjv"
+	)
+	return t.NewPackage("spirv-tools", version, newFromGitHub(
+		"KhronosGroup/SPIRV-Tools",
+		"v"+version,
+		checksum,
+	), nil, &CMakeHelper{
+		Cache: []KV{
+			{"CMAKE_BUILD_TYPE", "Release"},
+			{"SPIRV-Headers_SOURCE_DIR", "/system"},
+		},
+	},
+		Python,
+
+		SPIRVHeaders,
+	), version
+}
+func init() {
+	artifactsM[SPIRVTools] = Metadata{
+		f: Toolchain.newSPIRVTools,
+
+		Name:        "spirv-tools",
+		Description: "an API and commands for processing SPIR-V modules",
+		Website:     "https://github.com/KhronosGroup/SPIRV-Tools",
+
+		Dependencies: P{
+			SPIRVHeaders,
+		},
+
+		ID: 14894,
+	}
+}
+
+func (t Toolchain) newGlslang() (pkg.Artifact, string) {
+	const (
+		version  = "16.2.0"
+		checksum = "6_UuF9reLRDaVkgO-9IfB3kMwme3lQZM8LL8YsJwPdUFkrjzxJtf2A9X3w9nFxj2"
+	)
+	return t.NewPackage("glslang", version, newFromGitHub(
+		"KhronosGroup/glslang",
+		version,
+		checksum,
+	), &PackageAttr{
+		// test suite writes to source
+		Writable: true,
+		Chmod:    true,
+	}, &CMakeHelper{
+		Cache: []KV{
+			{"CMAKE_BUILD_TYPE", "Release"},
+			{"BUILD_SHARED_LIBS", "ON"},
+			{"ALLOW_EXTERNAL_SPIRV_TOOLS", "ON"},
+		},
+		Script: "ctest",
+	},
+		Python,
+		Bash,
+		Diffutils,
+
+		SPIRVTools,
+	), version
+}
+func init() {
+	artifactsM[Glslang] = Metadata{
+		f: Toolchain.newGlslang,
+
+		Name:        "glslang",
+		Description: "reference front end for GLSL/ESSL",
+		Website:     "https://github.com/KhronosGroup/glslang",
+
+		ID: 205796,
+	}
+}

internal/rosa/gnu.go

@@ -11,9 +11,9 @@ func (t Toolchain) newM4() (pkg.Artifact, string) {
 		version  = "1.4.21"
 		checksum = "pPa6YOo722Jw80l1OsH1tnUaklnPFjFT-bxGw5iAVrZTm1P8FQaWao_NXop46-pm"
 	)
-	return t.NewPackage("m4", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("m4", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/m4/m4-"+version+".tar.bz2",
+		"https://ftpmirror.gnu.org/gnu/m4/m4-"+version+".tar.bz2",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarBzip2,
 	), &PackageAttr{
 		Writable: true,
@@ -43,9 +43,9 @@ func (t Toolchain) newBison() (pkg.Artifact, string) {
 		version  = "3.8.2"
 		checksum = "BhRM6K7URj1LNOkIDCFDctSErLS-Xo5d9ba9seg10o6ACrgC1uNhED7CQPgIY29Y"
 	)
-	return t.NewPackage("bison", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("bison", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/bison/bison-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/bison/bison-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, (*MakeHelper)(nil),
 		M4,
@@ -70,9 +70,9 @@ func (t Toolchain) newSed() (pkg.Artifact, string) {
 		version  = "4.9"
 		checksum = "pe7HWH4PHNYrazOTlUoE1fXmhn2GOPFN_xE62i0llOr3kYGrH1g2_orDz0UtZ9Nt"
 	)
-	return t.NewPackage("sed", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("sed", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/sed/sed-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/sed/sed-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, (*MakeHelper)(nil),
 		Diffutils,
@@ -95,15 +95,15 @@ func (t Toolchain) newAutoconf() (pkg.Artifact, string) {
 		version  = "2.73"
 		checksum = "yGabDTeOfaCUB0JX-h3REYLYzMzvpDwFmFFzHNR7QilChCUNE4hR6q7nma4viDYg"
 	)
-	return t.NewPackage("autoconf", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("autoconf", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/autoconf/autoconf-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/autoconf/autoconf-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		Flag: TExclusive,
 	}, &MakeHelper{
 		Check: []string{
-			`TESTSUITEFLAGS="-j$(nproc)"`,
+			"TESTSUITEFLAGS=" + jobsFlagE,
 			"check",
 		},
 	},
@@ -135,9 +135,9 @@ func (t Toolchain) newAutomake() (pkg.Artifact, string) {
 		version  = "1.18.1"
 		checksum = "FjvLG_GdQP7cThTZJLDMxYpRcKdpAVG-YDs1Fj1yaHlSdh_Kx6nRGN14E0r_BjcG"
 	)
-	return t.NewPackage("automake", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("automake", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/automake/automake-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/automake/automake-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		Writable: true,
@@ -179,13 +179,13 @@ func (t Toolchain) newLibtool() (pkg.Artifact, string) {
 		version  = "2.5.4"
 		checksum = "pa6LSrQggh8mSJHQfwGjysAApmZlGJt8wif2cCLzqAAa2jpsTY0jZ-6stS3BWZ2Q"
 	)
-	return t.NewPackage("libtool", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("libtool", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/libtool/libtool-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/libtool/libtool-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, &MakeHelper{
 		Check: []string{
-			`TESTSUITEFLAGS="-j$(nproc)"`,
+			"TESTSUITEFLAGS=" + jobsFlagE,
 			"check",
 		},
 	},
@@ -210,9 +210,9 @@ func (t Toolchain) newGzip() (pkg.Artifact, string) {
 		version  = "1.14"
 		checksum = "NWhjUavnNfTDFkZJyAUonL9aCOak8GVajWX2OMlzpFnuI0ErpBFyj88mz2xSjz0q"
 	)
-	return t.NewPackage("gzip", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("gzip", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/gzip/gzip-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/gzip/gzip-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, &MakeHelper{
 		// dependency loop
@@ -236,9 +236,9 @@ func (t Toolchain) newGettext() (pkg.Artifact, string) {
 		version  = "1.0"
 		checksum = "3MasKeEdPeFEgWgzsBKk7JqWqql1wEMbgPmzAfs-mluyokoW0N8oQVxPQoOnSdgC"
 	)
-	return t.NewPackage("gettext", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("gettext", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/gettext/gettext-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/gettext/gettext-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		Writable: true,
@@ -282,9 +282,9 @@ func (t Toolchain) newDiffutils() (pkg.Artifact, string) {
 		version  = "3.12"
 		checksum = "9J5VAq5oA7eqwzS1Yvw-l3G5o-TccUrNQR3PvyB_lgdryOFAfxtvQfKfhdpquE44"
 	)
-	return t.NewPackage("diffutils", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("diffutils", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/diffutils/diffutils-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/diffutils/diffutils-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		Writable: true,
@@ -315,9 +315,9 @@ func (t Toolchain) newPatch() (pkg.Artifact, string) {
 		version  = "2.8"
 		checksum = "MA0BQc662i8QYBD-DdGgyyfTwaeALZ1K0yusV9rAmNiIsQdX-69YC4t9JEGXZkeR"
 	)
-	return t.NewPackage("patch", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("patch", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/patch/patch-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/patch/patch-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		Writable: true,
@@ -347,9 +347,9 @@ func (t Toolchain) newBash() (pkg.Artifact, string) {
 		version  = "5.3"
 		checksum = "4LQ_GRoB_ko-Ih8QPf_xRKA02xAm_TOxQgcJLmFDT6udUPxTAWrsj-ZNeuTusyDq"
 	)
-	return t.NewPackage("bash", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("bash", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/bash/bash-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/bash/bash-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		Flag: TEarly,
@@ -377,9 +377,9 @@ func (t Toolchain) newCoreutils() (pkg.Artifact, string) {
 		version  = "9.10"
 		checksum = "o-B9wssRnZySzJUI1ZJAgw-bZtj1RC67R9po2AcM2OjjS8FQIl16IRHpC6IwO30i"
 	)
-	return t.NewPackage("coreutils", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("coreutils", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/coreutils/coreutils-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/coreutils/coreutils-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		Writable: true,
@@ -516,9 +516,9 @@ func (t Toolchain) newTexinfo() (pkg.Artifact, string) {
 		version  = "7.3"
 		checksum = "RRmC8Xwdof7JuZJeWGAQ_GeASIHAuJFQMbNONXBz5InooKIQGmqmWRjGNGEr5n4-"
 	)
-	return t.NewPackage("texinfo", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("texinfo", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/texinfo/texinfo-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/texinfo/texinfo-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, &MakeHelper{
 		// nonstandard glibc extension
@@ -549,9 +549,9 @@ func (t Toolchain) newGperf() (pkg.Artifact, string) {
 		version  = "3.3"
 		checksum = "RtIy9pPb_Bb8-31J2Nw-rRGso2JlS-lDlVhuNYhqR7Nt4xM_nObznxAlBMnarJv7"
 	)
-	return t.NewPackage("gperf", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("gperf", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gperf/gperf-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gperf/gperf-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, (*MakeHelper)(nil),
 		Diffutils,
@@ -574,9 +574,9 @@ func (t Toolchain) newGawk() (pkg.Artifact, string) {
 		version  = "5.4.0"
 		checksum = "m0RkIolC-PI7EY5q8pcx5Y-0twlIW0Yp3wXXmV-QaHorSdf8BhZ7kW9F8iWomz0C"
 	)
-	return t.NewPackage("gawk", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("gawk", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/gawk/gawk-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/gawk/gawk-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		Flag: TEarly,
@@ -602,9 +602,9 @@ func (t Toolchain) newGrep() (pkg.Artifact, string) {
 		version  = "3.12"
 		checksum = "qMB4RjaPNRRYsxix6YOrjE8gyAT1zVSTy4nW4wKW9fqa0CHYAuWgPwDTirENzm_1"
 	)
-	return t.NewPackage("grep", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("grep", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/grep/grep-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/grep/grep-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		Writable: true,
@@ -639,7 +639,6 @@ func (t Toolchain) newFindutils() (pkg.Artifact, string) {
 		nil, "https://ftpmirror.gnu.org/gnu/findutils/findutils-"+version+".tar.xz",
 		mustDecode(checksum),
 	), &PackageAttr{
-		SourceKind: SourceKindTarXZ,
 		ScriptEarly: `
 echo '#!/bin/sh' > gnulib-tests/test-c32ispunct.sh
 echo 'int main(){return 0;}' > tests/xargs/test-sigusr.c
@@ -667,9 +666,9 @@ func (t Toolchain) newBC() (pkg.Artifact, string) {
 		version  = "1.08.2"
 		checksum = "8h6f3hjV80XiFs6v9HOPF2KEyg1kuOgn5eeFdVspV05ODBVQss-ey5glc8AmneLy"
 	)
-	return t.NewPackage("bc", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("bc", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/bc/bc-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/bc/bc-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		// source expected to be writable
@@ -696,9 +695,9 @@ func (t Toolchain) newLibiconv() (pkg.Artifact, string) {
 		version  = "1.19"
 		checksum = "UibB6E23y4MksNqYmCCrA3zTFO6vJugD1DEDqqWYFZNuBsUWMVMcncb_5pPAr88x"
 	)
-	return t.NewPackage("libiconv", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("libiconv", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/libiconv/libiconv-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/libiconv/libiconv-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, (*MakeHelper)(nil)), version
 }
@@ -719,9 +718,9 @@ func (t Toolchain) newTar() (pkg.Artifact, string) {
 		version  = "1.35"
 		checksum = "zSaoSlVUDW0dSfm4sbL4FrXLFR8U40Fh3zY5DWhR5NCIJ6GjU6Kc4VZo2-ZqpBRA"
 	)
-	return t.NewPackage("tar", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("tar", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/tar/tar-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/tar/tar-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, &MakeHelper{
 		Configure: []KV{
@@ -733,7 +732,7 @@ func (t Toolchain) newTar() (pkg.Artifact, string) {
 			// very expensive
 			"TARTEST_SKIP_LARGE_FILES=1",
 
-			`TESTSUITEFLAGS="-j$(nproc)"`,
+			"TESTSUITEFLAGS=" + jobsFlagE,
 			"check",
 		},
 	},
@@ -761,9 +760,9 @@ func (t Toolchain) newParallel() (pkg.Artifact, string) {
 		version  = "20260322"
 		checksum = "gHoPmFkOO62ev4xW59HqyMlodhjp8LvTsBOwsVKHUUdfrt7KwB8koXmSVqQ4VOrB"
 	)
-	return t.NewPackage("parallel", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("parallel", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/parallel/parallel-"+version+".tar.bz2",
+		"https://ftpmirror.gnu.org/gnu/parallel/parallel-"+version+".tar.bz2",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarBzip2,
 	), nil, (*MakeHelper)(nil),
 		Perl,
@@ -790,9 +789,9 @@ func (t Toolchain) newLibunistring() (pkg.Artifact, string) {
 		version  = "1.4.2"
 		checksum = "iW9BbfLoVlXjWoLTZ4AekQSu4cFBnLcZ4W8OHWbv0AhJNgD3j65_zqaLMzFKylg2"
 	)
-	return t.NewPackage("libunistring", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("libunistring", version, newTar(
-		nil, "https://ftp.gnu.org/gnu/libunistring/libunistring-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/libunistring/libunistring-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		Writable: true,
@@ -823,9 +822,9 @@ func (t Toolchain) newLibtasn1() (pkg.Artifact, string) {
 		version  = "4.21.0"
 		checksum = "9DYI3UYbfYLy8JsKUcY6f0irskbfL0fHZA91Q-JEOA3kiUwpodyjemRsYRjUpjuq"
 	)
-	return t.NewPackage("libtasn1", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("libtasn1", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/libtasn1/libtasn1-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/libtasn1/libtasn1-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, (*MakeHelper)(nil)), version
 }
@@ -846,9 +845,9 @@ func (t Toolchain) newReadline() (pkg.Artifact, string) {
 		version  = "8.3"
 		checksum = "r-lcGRJq_MvvBpOq47Z2Y1OI2iqrmtcqhTLVXR0xWo37ZpC2uT_md7gKq5o_qTMV"
 	)
-	return t.NewPackage("readline", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("readline", version, newTar(
-		nil, "https://ftp.gnu.org/gnu/readline/readline-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/readline/readline-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, &MakeHelper{
 		Configure: []KV{
@@ -889,10 +888,9 @@ func (t Toolchain) newGnuTLS() (pkg.Artifact, string) {
 		}
 	}
 
-	return t.NewPackage("gnutls", version, t.NewViaGit(
+	return t.NewPackage("gnutls", version, t.newTagRemote(
 		"https://gitlab.com/gnutls/gnutls.git",
-		"refs/tags/"+version,
+		version, checksum,
-		mustDecode(checksum),
 	), &PackageAttr{
 		Patches: []KV{
 			{"bootstrap-remove-gtk-doc", `diff --git a/bootstrap.conf b/bootstrap.conf
@@ -1062,9 +1060,9 @@ func (t Toolchain) newBinutils() (pkg.Artifact, string) {
 		version  = "2.46.0"
 		checksum = "4kK1_EXQipxSqqyvwD4LbiMLFKCUApjq6PeG4XJP4dzxYGqDeqXfh8zLuTyOuOVR"
 	)
-	return t.NewPackage("binutils", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("binutils", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/binutils/binutils-"+version+".tar.bz2",
+		"https://ftpmirror.gnu.org/gnu/binutils/binutils-"+version+".tar.bz2",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarBzip2,
 	), nil, (*MakeHelper)(nil),
 		Bash,
@@ -1087,12 +1085,16 @@ func (t Toolchain) newGMP() (pkg.Artifact, string) {
 		version  = "6.3.0"
 		checksum = "yrgbgEDWKDdMWVHh7gPbVl56-sRtVVhfvv0M_LX7xMUUk_mvZ1QOJEAnt7g4i3k5"
 	)
-	return t.NewPackage("gmp", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("gmp", version, newTar(
-		nil, "https://gcc.gnu.org/pub/gcc/infrastructure/"+
+		"https://gcc.gnu.org/pub/gcc/infrastructure/"+
 			"gmp-"+version+".tar.bz2",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarBzip2,
-	), nil, (*MakeHelper)(nil),
+	), &PackageAttr{
+		Env: []string{
+			"CC=cc",
+		},
+	}, (*MakeHelper)(nil),
 		M4,
 	), version
 }
@@ -1113,10 +1115,10 @@ func (t Toolchain) newMPFR() (pkg.Artifact, string) {
 		version  = "4.2.2"
 		checksum = "wN3gx0zfIuCn9r3VAn_9bmfvAYILwrRfgBjYSD1IjLqyLrLojNN5vKyQuTE9kA-B"
 	)
-	return t.NewPackage("mpfr", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("mpfr", version, newTar(
-		nil, "https://gcc.gnu.org/pub/gcc/infrastructure/"+
+		"https://gcc.gnu.org/pub/gcc/infrastructure/"+
 			"mpfr-"+version+".tar.bz2",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarBzip2,
 	), nil, (*MakeHelper)(nil),
 		GMP,
@@ -1140,13 +1142,12 @@ func init() {
 
 func (t Toolchain) newMPC() (pkg.Artifact, string) {
 	const (
-		version  = "1.4.0"
+		version  = "1.4.1"
-		checksum = "TbrxLiE3ipQrHz_F3Xzz4zqBAnkMWyjhNwIK6wh9360RZ39xMt8rxfW3LxA9SnvU"
+		checksum = "wdXAhplnS89FjVp20m2nC2CmLFQeyQqLpQAfViTy4vPxFdv2WYOTtfBKeIk5_Rec"
 	)
-	return t.NewPackage("mpc", version, t.NewViaGit(
+	return t.NewPackage("mpc", version, t.newTagRemote(
 		"https://gitlab.inria.fr/mpc/mpc.git",
-		"refs/tags/"+version,
+		version, checksum,
-		mustDecode(checksum),
 	), &PackageAttr{
 		// does not find mpc-impl.h otherwise
 		EnterSource: true,
@@ -1182,10 +1183,17 @@ func (t Toolchain) newGCC() (pkg.Artifact, string) {
 		version  = "15.2.0"
 		checksum = "TXJ5WrbXlGLzy1swghQTr4qxgDCyIZFgJry51XEPTBZ8QYbVmFeB4lZbSMtPJ-a1"
 	)
-	return t.NewPackage("gcc", version, pkg.NewHTTPGetTar(
+
-		nil, "https://ftp.tsukuba.wide.ad.jp/software/gcc/releases/"+
+	var configureExtra []KV
+	switch runtime.GOARCH {
+	case "amd64", "arm64":
+		configureExtra = append(configureExtra, KV{"with-multilib-list", "''"})
+	}
+
+	return t.NewPackage("gcc", version, newTar(
+		"https://ftp.tsukuba.wide.ad.jp/software/gcc/releases/"+
 			"gcc-"+version+"/gcc-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		Patches: []KV{
@@ -1347,9 +1355,8 @@ ln -s system/lib /work/
 		// it also saturates the CPU for a consequential amount of time.
 		Flag: TExclusive,
 	}, &MakeHelper{
-		Configure: []KV{
+		Configure: append([]KV{
 			{"disable-multilib"},
-			{"with-multilib-list", `""`},
 			{"enable-default-pie"},
 			{"disable-nls"},
 			{"with-gnu-as"},
@@ -1357,7 +1364,7 @@ ln -s system/lib /work/
 			{"with-system-zlib"},
 			{"enable-languages", "c,c++,go"},
 			{"with-native-system-header-dir", "/system/include"},
-		},
+		}, configureExtra...),
 		Make: []string{
 			"BOOT_CFLAGS='-O2 -g'",
 			"bootstrap",

internal/rosa/go.go

@@ -21,9 +21,9 @@ cd /work/system/go/src
 chmod -R +w ..
 
 ./make.bash
-`, pkg.Path(AbsUsrSrc.Append("go"), false, pkg.NewHTTPGetTar(
+`, pkg.Path(AbsUsrSrc.Append("go"), false, newTar(
-		nil, "https://dl.google.com/go/go1.4-bootstrap-20171003.tar.gz",
+		"https://dl.google.com/go/go1.4-bootstrap-20171003.tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	)))
 }
@@ -55,9 +55,9 @@ ln -s \
 	../go/bin/go \
 	../go/bin/gofmt \
 	/work/system/bin
-`, pkg.Path(AbsUsrSrc.Append("go"), false, pkg.NewHTTPGetTar(
+`, pkg.Path(AbsUsrSrc.Append("go"), false, newTar(
-		nil, "https://go.dev/dl/go"+version+".src.tar.gz",
+		"https://go.dev/dl/go"+version+".src.tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	)))
 }

internal/rosa/gtk.go

@@ -10,10 +10,9 @@ func (t Toolchain) newGLib() (pkg.Artifact, string) {
 		version  = "2.88.0"
 		checksum = "T79Cg4z6j-sDZ2yIwvbY4ccRv2-fbwbqgcw59F5NQ6qJT6z4v261vbYp3dHO6Ma3"
 	)
-	return t.NewPackage("glib", version, t.NewViaGit(
+	return t.NewPackage("glib", version, t.newTagRemote(
 		"https://gitlab.gnome.org/GNOME/glib.git",
-		"refs/tags/"+version,
+		version, checksum,
-		mustDecode(checksum),
 	), &PackageAttr{
 		Paths: []pkg.ExecPath{
 			pkg.Path(fhs.AbsEtc.Append(

internal/rosa/hakurei.go

@@ -99,7 +99,7 @@ mkdir -p /work/system/bin/
 		f: func(t Toolchain) (pkg.Artifact, string) {
 			return t.newHakurei("-dist", `
 export HAKUREI_VERSION
-DESTDIR=/work /usr/src/hakurei/dist/release.sh
+DESTDIR=/work /usr/src/hakurei/all.sh
 `, true), hakureiVersion
 		},
 

internal/rosa/hakurei_release.go

@@ -4,13 +4,13 @@ package rosa
 
 import "hakurei.app/internal/pkg"
 
-const hakureiVersion = "0.3.7"
+const hakureiVersion = "0.4.0"
 
 // hakureiSource is the source code of a hakurei release.
-var hakureiSource = pkg.NewHTTPGetTar(
+var hakureiSource = newTar(
-	nil, "https://git.gensokyo.uk/rosa/hakurei/archive/"+
+	"https://git.gensokyo.uk/rosa/hakurei/archive/"+
 		"v"+hakureiVersion+".tar.gz",
-	mustDecode("Xh_sdITOATEAQN5_UuaOyrWsgboxorqRO9bml3dGm8GAxF8NFpB7MqhSZgjJxAl2"),
+	"wfQ9DqCW0Fw9o91wj-I55waoqzB-UqzzuC0_2h-P-1M78SgZ1WHSPCDJMth6EyC2",
 	pkg.TarGzip,
 )
 

internal/rosa/kernel.go

@@ -2,12 +2,12 @@ package rosa
 
 import "hakurei.app/internal/pkg"
 
-const kernelVersion = "6.12.80"
+const kernelVersion = "6.12.81"
 
-var kernelSource = pkg.NewHTTPGetTar(
+var kernelSource = newTar(
-	nil, "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/"+
+	"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/"+
 		"snapshot/linux-"+kernelVersion+".tar.gz",
-	mustDecode("_iJEAYoQISJxefuWZYfv0RPWUmHHIjHQw33Fapix-irXrEIREP5ruK37UJW4uMZO"),
+	"fBkNwf82DQXh74in6gaF2Jot7Vg-Vlcp9BUtCEipL9mvcM1EXLVFdV7FcrO20Eve",
 	pkg.TarGzip,
 )
 
@@ -1221,7 +1221,7 @@ install -Dm0500 \
 	/sbin/depmod
 
 make \
-	"-j$(nproc)" \
+	` + jobsFlagE + ` \
 	-f /usr/src/kernel/Makefile \
 	O=/tmp/kbuild \
 	LLVM=1 \
@@ -1282,14 +1282,14 @@ func init() {
 
 func (t Toolchain) newFirmware() (pkg.Artifact, string) {
 	const (
-		version  = "20260309"
+		version  = "20260410"
-		checksum = "M1az8BxSiOEH3LA11Trc5VAlakwAHhP7-_LKWg6k-SVIzU3xclMDO4Tiujw1gQrC"
+		checksum = "J8PdQlGqwrivpskPzbL6xacqR6mlKtXpe5RpzFfVzKPAgG81ZRXsc3qrxwdGJbil"
 	)
-	return t.NewPackage("firmware", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("firmware", version, newFromGitLab(
-		nil, "https://gitlab.com/kernel-firmware/linux-firmware/-/"+
+		"gitlab.com",
-			"archive/"+version+"/linux-firmware-"+version+".tar.bz2",
+		"kernel-firmware/linux-firmware",
-		mustDecode(checksum),
+		version,
-		pkg.TarBzip2,
+		checksum,
 	), &PackageAttr{
 		// dedup creates temporary file
 		Writable: true,
@@ -1309,7 +1309,7 @@ func (t Toolchain) newFirmware() (pkg.Artifact, string) {
 			"install-zst",
 		},
 		SkipCheck: true, // requires pre-commit
-		Install:   `make "-j$(nproc)" DESTDIR=/work/system dedup`,
+		Install:   "make " + jobsFlagE + " DESTDIR=/work/system dedup",
 	},
 		Parallel,
 		Rdfind,

internal/rosa/kmod.go

@@ -7,10 +7,10 @@ func (t Toolchain) newKmod() (pkg.Artifact, string) {
 		version  = "34.2"
 		checksum = "0K7POeTKxMhExsaTsnKAC6LUNsRSfe6sSZxWONPbOu-GI_pXOw3toU_BIoqfBhJV"
 	)
-	return t.NewPackage("kmod", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("kmod", version, newTar(
-		nil, "https://www.kernel.org/pub/linux/utils/kernel/"+
+		"https://www.kernel.org/pub/linux/utils/kernel/"+
 			"kmod/kmod-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, &MesonHelper{
 		Setup: []KV{

internal/rosa/libbsd.go

@@ -7,10 +7,9 @@ func (t Toolchain) newLibmd() (pkg.Artifact, string) {
 		version  = "1.1.0"
 		checksum = "9apYqPPZm0j5HQT8sCsVIhnVIqRD7XgN7kPIaTwTqnTuUq5waUAMq4M7ev8CODJ1"
 	)
-	return t.NewPackage("libmd", version, t.NewViaGit(
+	return t.NewPackage("libmd", version, t.newTagRemote(
 		"https://git.hadrons.org/git/libmd.git",
-		"refs/tags/"+version,
+		version, checksum,
-		mustDecode(checksum),
 	), nil, &MakeHelper{
 		Generate: "echo '" + version + "' > .dist-version && ./autogen",
 		ScriptMakeEarly: `
@@ -38,10 +37,9 @@ func (t Toolchain) newLibbsd() (pkg.Artifact, string) {
 		version  = "0.12.2"
 		checksum = "NVS0xFLTwSP8JiElEftsZ-e1_C-IgJhHrHE77RwKt5178M7r087waO-zYx2_dfGX"
 	)
-	return t.NewPackage("libbsd", version, t.NewViaGit(
+	return t.NewPackage("libbsd", version, t.newTagRemote(
 		"https://gitlab.freedesktop.org/libbsd/libbsd.git",
-		"refs/tags/"+version,
+		version, checksum,
-		mustDecode(checksum),
 	), nil, &MakeHelper{
 		Generate: "echo '" + version + "' > .dist-version && ./autogen",
 	},

internal/rosa/libcap.go

@@ -7,10 +7,10 @@ func (t Toolchain) newLibcap() (pkg.Artifact, string) {
 		version  = "2.78"
 		checksum = "wFdUkBhFMD9InPnrBZyegWrlPSAg_9JiTBC-eSFyWWlmbzL2qjh2mKxr9Kx2a8ut"
 	)
-	return t.NewPackage("libcap", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("libcap", version, newTar(
-		nil, "https://git.kernel.org/pub/scm/libs/libcap/libcap.git/"+
+		"https://git.kernel.org/pub/scm/libs/libcap/libcap.git/"+
 			"snapshot/libcap-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		// uses source tree as scratch space

internal/rosa/libev.go

@@ -7,9 +7,9 @@ func (t Toolchain) newLibev() (pkg.Artifact, string) {
 		version  = "4.33"
 		checksum = "774eSXV_4k8PySRprUDChbEwsw-kzjIFnJ3MpNOl5zDpamBRvC3BqPyRxvkwcL6_"
 	)
-	return t.NewPackage("libev", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("libev", version, newTar(
-		nil, "https://dist.schmorp.de/libev/Attic/libev-"+version+".tar.gz",
+		"https://dist.schmorp.de/libev/Attic/libev-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, (*MakeHelper)(nil)), version
 }

internal/rosa/libexpat.go

@@ -11,11 +11,11 @@ func (t Toolchain) newLibexpat() (pkg.Artifact, string) {
 		version  = "2.7.5"
 		checksum = "vTRUjjg-qbHSXUBYKXgzVHkUO7UNyuhrkSYrE7ikApQm0g-OvQ8tspw4w55M-1Tp"
 	)
-	return t.NewPackage("libexpat", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("libexpat", version, newFromGitHubRelease(
-		nil, "https://github.com/libexpat/libexpat/releases/download/"+
+		"libexpat/libexpat",
-			"R_"+strings.ReplaceAll(version, ".", "_")+"/"+
+		"R_"+strings.ReplaceAll(version, ".", "_"),
-			"expat-"+version+".tar.bz2",
+		"expat-"+version+".tar.bz2",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarBzip2,
 	), nil, (*MakeHelper)(nil),
 		Bash,

internal/rosa/libffi.go

@@ -7,10 +7,11 @@ func (t Toolchain) newLibffi() (pkg.Artifact, string) {
 		version  = "3.5.2"
 		checksum = "2_Q-ZNBBbVhltfL5zEr0wljxPegUimTK4VeMSiwJEGksls3n4gj3lV0Ly3vviSFH"
 	)
-	return t.NewPackage("libffi", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("libffi", version, newFromGitHubRelease(
-		nil, "https://github.com/libffi/libffi/releases/download/"+
+		"libffi/libffi",
-			"v"+version+"/libffi-"+version+".tar.gz",
+		"v"+version,
-		mustDecode(checksum),
+		"libffi-"+version+".tar.gz",
+		checksum,
 		pkg.TarGzip,
 	), nil, (*MakeHelper)(nil),
 		KernelHeaders,

internal/rosa/libgd.go

@@ -7,10 +7,10 @@ func (t Toolchain) newLibgd() (pkg.Artifact, string) {
 		version  = "2.3.3"
 		checksum = "8T-sh1_FJT9K9aajgxzh8ot6vWIF-xxjcKAHvTak9MgGUcsFfzP8cAvvv44u2r36"
 	)
-	return t.NewPackage("libgd", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("libgd", version, newFromGitHubRelease(
-		nil, "https://github.com/libgd/libgd/releases/download/"+
+		"libgd/libgd",
-			"gd-"+version+"/libgd-"+version+".tar.gz",
+		"gd-"+version,
-		mustDecode(checksum),
+		"libgd-"+version+".tar.gz", checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		Env: []string{

internal/rosa/libpsl.go

@@ -7,10 +7,11 @@ func (t Toolchain) newLibpsl() (pkg.Artifact, string) {
 		version  = "0.21.5"
 		checksum = "XjfxSzh7peG2Vg4vJlL8z4JZJLcXqbuP6pLWkrGCmRxlnYUFTKNBqWGHCxEOlCad"
 	)
-	return t.NewPackage("libpsl", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("libpsl", version, newFromGitHubRelease(
-		nil, "https://github.com/rockdaboot/libpsl/releases/download/"+
+		"rockdaboot/libpsl",
-			version+"/libpsl-"+version+".tar.gz",
+		version,
-		mustDecode(checksum),
+		"libpsl-"+version+".tar.gz",
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		Writable: true,

internal/rosa/libseccomp.go

@@ -7,10 +7,11 @@ func (t Toolchain) newLibseccomp() (pkg.Artifact, string) {
 		version  = "2.6.0"
 		checksum = "mMu-iR71guPjFbb31u-YexBaanKE_nYPjPux-vuBiPfS_0kbwJdfCGlkofaUm-EY"
 	)
-	return t.NewPackage("libseccomp", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("libseccomp", version, newFromGitHubRelease(
-		nil, "https://github.com/seccomp/libseccomp/releases/download/"+
+		"seccomp/libseccomp",
-			"v"+version+"/libseccomp-"+version+".tar.gz",
+		"v"+version,
-		mustDecode(checksum),
+		"libseccomp-"+version+".tar.gz",
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		ScriptEarly: `

internal/rosa/libucontext.go

@@ -7,11 +7,10 @@ func (t Toolchain) newLibucontext() (pkg.Artifact, string) {
 		version  = "1.5"
 		checksum = "Ggk7FMmDNBdCx1Z9PcNWWW6LSpjGYssn2vU0GK5BLXJYw7ZxZbA2m_eSgT9TFnIG"
 	)
-	return t.NewPackage("libucontext", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("libucontext", version, newFromGitHub(
-		nil, "https://github.com/kaniini/libucontext/archive/refs/tags/"+
+		"kaniini/libucontext",
-			"libucontext-"+version+".tar.gz",
+		"libucontext-"+version,
-		mustDecode(checksum),
+		checksum,
-		pkg.TarGzip,
 	), &PackageAttr{
 		// uses source tree as scratch space
 		Writable:    true,

internal/rosa/libxml2.go

@@ -4,13 +4,12 @@ import "hakurei.app/internal/pkg"
 
 func (t Toolchain) newLibxml2() (pkg.Artifact, string) {
 	const (
-		version  = "2.15.2"
+		version  = "2.15.3"
-		checksum = "zwQvCIBnjzUFY-inX5ckfNT3mIezsCRV55C_Iztde5OnRTB3u33lfO5h03g7DK_8"
+		checksum = "oWkNe53c3d4Lt4OzrXPHBcOLHJ3TWqpa0x7B7bh_DyZ-uIMiplpdZjQRgRWVal2h"
 	)
-	return t.NewPackage("libxml2", version, t.NewViaGit(
+	return t.NewPackage("libxml2", version, t.newTagRemote(
 		"https://gitlab.gnome.org/GNOME/libxml2.git",
-		"refs/tags/v"+version,
+		"v"+version, checksum,
-		mustDecode(checksum),
 	), &PackageAttr{
 		// can't create shell.out: Read-only file system
 		Writable: true,

internal/rosa/libxslt.go

@@ -7,10 +7,9 @@ func (t Toolchain) newLibxslt() (pkg.Artifact, string) {
 		version  = "1.1.45"
 		checksum = "MZc_dyUWpHChkWDKa5iycrECxBsRd4ZMbYfL4VojTbung593mlH2tHGmxYB6NFYT"
 	)
-	return t.NewPackage("libxslt", version, t.NewViaGit(
+	return t.NewPackage("libxslt", version, t.newTagRemote(
 		"https://gitlab.gnome.org/GNOME/libxslt.git",
-		"refs/tags/v"+version,
+		"v"+version, checksum,
-		mustDecode(checksum),
 	), nil, &MakeHelper{
 		Generate: "NOCONFIGURE=1 ./autogen.sh",
 

internal/rosa/llvm.go

@@ -1,247 +1,43 @@
 package rosa
 
-import (
+import "hakurei.app/internal/pkg"
-	"runtime"
-	"slices"
-	"strconv"
-	"strings"
-	"sync"
 
-	"hakurei.app/internal/pkg"
+func init() {
-)
+	artifactsM[llvmSource] = Metadata{
+		f: func(t Toolchain) (pkg.Artifact, string) {
+			return t.NewPatchedSource("llvm", llvmVersion, newFromGitHub(
+				"llvm/llvm-project",
+				"llvmorg-"+llvmVersion,
+				llvmChecksum,
+			), true, llvmPatches...), llvmVersion
+		},
 
-// llvmAttr holds the attributes that will be applied to a new [pkg.Artifact]
+		Name:        "llvm-project",
-// containing a LLVM variant.
+		Description: "LLVM monorepo with Rosa OS patches",
-type llvmAttr struct {
-	// Enabled projects and runtimes.
-	pr int
 
-	// Concatenated with default environment for PackageAttr.Env.
+		ID: 1830,
-	env []string
-	// Concatenated with generated entries for CMakeHelper.Cache.
-	cmake []KV
-	// Override CMakeHelper.Append.
-	append []string
-	// Passed through to PackageAttr.NonStage0.
-	nonStage0 []pkg.Artifact
-	// Concatenated with default fixup for CMakeHelper.Script.
-	script string
-
-	// Patch name and body pairs.
-	patches []KV
-}
-
-const (
-	llvmProjectClang = 1 << iota
-	llvmProjectLld
-
-	llvmProjectAll = 1<<iota - 1
-
-	llvmRuntimeCompilerRT = 1 << iota
-	llvmRuntimeLibunwind
-	llvmRuntimeLibc
-	llvmRuntimeLibcxx
-	llvmRuntimeLibcxxABI
-
-	llvmAll        = 1<<iota - 1
-	llvmRuntimeAll = llvmAll - (2 * llvmProjectAll) - 1
-)
-
-// llvmFlagName resolves a llvmAttr.flags project or runtime flag to its name.
-func llvmFlagName(flag int) string {
-	switch flag {
-	case llvmProjectClang:
-		return "clang"
-	case llvmProjectLld:
-		return "lld"
-
-	case llvmRuntimeCompilerRT:
-		return "compiler-rt"
-	case llvmRuntimeLibunwind:
-		return "libunwind"
-	case llvmRuntimeLibc:
-		return "libc"
-	case llvmRuntimeLibcxx:
-		return "libcxx"
-	case llvmRuntimeLibcxxABI:
-		return "libcxxabi"
-
-	default:
-		panic("invalid flag " + strconv.Itoa(flag))
 	}
 }
 
-// newLLVMVariant returns a [pkg.Artifact] containing a LLVM variant.
+func (t Toolchain) newCompilerRT() (pkg.Artifact, string) {
-func (t Toolchain) newLLVMVariant(variant string, attr *llvmAttr) pkg.Artifact {
+	muslHeaders, _ := t.newMusl(true)
-	if attr == nil {
+	return t.NewPackage("compiler-rt", llvmVersion, t.Load(llvmSource), &PackageAttr{
-		panic("LLVM attr must be non-nil")
+		NonStage0: []pkg.Artifact{
-	}
+			muslHeaders,
-
+		},
-	var projects, runtimes []string
+		Env: stage0ExclConcat(t, []string{},
-	for i := 1; i < llvmProjectAll; i <<= 1 {
-		if attr.pr&i != 0 {
-			projects = append(projects, llvmFlagName(i))
-		}
-	}
-	for i := (llvmProjectAll + 1) << 1; i < llvmRuntimeAll; i <<= 1 {
-		if attr.pr&i != 0 {
-			runtimes = append(runtimes, llvmFlagName(i))
-		}
-	}
-
-	var script string
-
-	cache := []KV{
-		{"CMAKE_BUILD_TYPE", "Release"},
-
-		{"LLVM_HOST_TRIPLE", `"${ROSA_TRIPLE}"`},
-		{"LLVM_DEFAULT_TARGET_TRIPLE", `"${ROSA_TRIPLE}"`},
-	}
-	if len(projects) > 0 {
-		cache = append(cache, []KV{
-			{"LLVM_ENABLE_PROJECTS", `"${ROSA_LLVM_PROJECTS}"`},
-		}...)
-	}
-	if len(runtimes) > 0 {
-		cache = append(cache, []KV{
-			{"LLVM_ENABLE_RUNTIMES", `"${ROSA_LLVM_RUNTIMES}"`},
-		}...)
-	}
-
-	cmakeAppend := []string{"llvm"}
-	if attr.append != nil {
-		cmakeAppend = attr.append
-	} else {
-		cache = append(cache, []KV{
-			{"LLVM_ENABLE_LIBCXX", "ON"},
-			{"LLVM_USE_LINKER", "lld"},
-
-			{"LLVM_INSTALL_BINUTILS_SYMLINKS", "ON"},
-			{"LLVM_INSTALL_CCTOOLS_SYMLINKS", "ON"},
-
-			{"LLVM_LIT_ARGS", "'--verbose'"},
-		}...)
-	}
-
-	if attr.pr&llvmProjectClang != 0 {
-		cache = append(cache, []KV{
-			{"CLANG_DEFAULT_LINKER", "lld"},
-			{"CLANG_DEFAULT_CXX_STDLIB", "libc++"},
-			{"CLANG_DEFAULT_RTLIB", "compiler-rt"},
-			{"CLANG_DEFAULT_UNWINDLIB", "libunwind"},
-		}...)
-	}
-	if attr.pr&llvmProjectLld != 0 {
-		script += `
-ln -s ld.lld /work/system/bin/ld
-`
-	}
-	if attr.pr&llvmRuntimeCompilerRT != 0 {
-		if attr.append == nil {
-			cache = append(cache, []KV{
-				{"COMPILER_RT_USE_LLVM_UNWINDER", "ON"},
-			}...)
-		}
-	}
-	if attr.pr&llvmRuntimeLibunwind != 0 {
-		cache = append(cache, []KV{
-			{"LIBUNWIND_USE_COMPILER_RT", "ON"},
-		}...)
-	}
-	if attr.pr&llvmRuntimeLibcxx != 0 {
-		cache = append(cache, []KV{
-			{"LIBCXX_HAS_MUSL_LIBC", "ON"},
-			{"LIBCXX_USE_COMPILER_RT", "ON"},
-		}...)
-	}
-	if attr.pr&llvmRuntimeLibcxxABI != 0 {
-		cache = append(cache, []KV{
-			{"LIBCXXABI_USE_COMPILER_RT", "ON"},
-			{"LIBCXXABI_USE_LLVM_UNWINDER", "ON"},
-		}...)
-	}
-
-	return t.NewPackage("llvm", llvmVersion, pkg.NewHTTPGetTar(
-		nil, "https://github.com/llvm/llvm-project/archive/refs/tags/"+
-			"llvmorg-"+llvmVersion+".tar.gz",
-		mustDecode(llvmChecksum),
-		pkg.TarGzip,
-	), &PackageAttr{
-		Patches: slices.Concat(attr.patches, []KV{
-			{"increase-stack-size-unconditional", `diff --git a/llvm/lib/Support/Threading.cpp b/llvm/lib/Support/Threading.cpp
-index 9da357a7ebb9..b2931510c1ae 100644
---- a/llvm/lib/Support/Threading.cpp
-+++ b/llvm/lib/Support/Threading.cpp
-@@ -80,7 +80,7 @@ unsigned llvm::ThreadPoolStrategy::compute_thread_count() const {
- // keyword.
- #include "llvm/Support/thread.h"
- 
--#if defined(__APPLE__)
-+#if defined(__APPLE__) || 1
-   // Darwin's default stack size for threads except the main one is only 512KB,
-   // which is not enough for some/many normal LLVM compilations. This implements
-   // the same interface as std::thread but requests the same stack size as the
-`},
-		}),
-		NonStage0: attr.nonStage0,
-
-		Env: slices.Concat([]string{
-			"ROSA_LLVM_PROJECTS=" + strings.Join(projects, ";"),
-			"ROSA_LLVM_RUNTIMES=" + strings.Join(runtimes, ";"),
-		}, attr.env),
-
-		Flag: TExclusive,
-	}, &CMakeHelper{
-		Variant: variant,
-
-		Cache:  slices.Concat(cache, attr.cmake),
-		Append: cmakeAppend,
-		Script: script + attr.script,
-	},
-		Python,
-		Perl,
-		Diffutils,
-		Bash,
-		Gawk,
-		Coreutils,
-		Findutils,
-
-		KernelHeaders,
-	)
-}
-
-// newLLVM returns LLVM toolchain across multiple [pkg.Artifact].
-func (t Toolchain) newLLVM() (musl, compilerRT, runtimes, clang pkg.Artifact) {
-	target := "'AArch64;RISCV;X86'"
-	if t.isStage0() {
-		switch runtime.GOARCH {
-		case "386", "amd64":
-			target = "X86"
-		case "arm64":
-			target = "AArch64"
-		case "riscv64":
-			target = "RISCV"
-
-		default:
-			panic("unsupported target " + runtime.GOARCH)
-		}
-	}
-
-	minimalDeps := []KV{
-		{"LLVM_ENABLE_ZLIB", "OFF"},
-		{"LLVM_ENABLE_ZSTD", "OFF"},
-		{"LLVM_ENABLE_LIBXML2", "OFF"},
-	}
-
-	muslHeaders, _ := t.newMusl(true, []string{
-		"CC=clang",
-	})
-
-	compilerRT = t.newLLVMVariant("compiler-rt", &llvmAttr{
-		env: stage0ExclConcat(t, []string{},
 			"LDFLAGS="+earlyLDFLAGS(false),
 		),
-		cmake: []KV{
+		Flag: TExclusive,
+	}, &CMakeHelper{
+		Append: []string{"compiler-rt"},
+
+		Cache: []KV{
+			{"CMAKE_BUILD_TYPE", "Release"},
+
+			{"LLVM_HOST_TRIPLE", `"${ROSA_TRIPLE}"`},
+			{"LLVM_DEFAULT_TARGET_TRIPLE", `"${ROSA_TRIPLE}"`},
+
 			// libc++ not yet available
 			{"CMAKE_CXX_COMPILER_TARGET", ""},
 
@@ -257,11 +53,7 @@ func (t Toolchain) newLLVM() (musl, compilerRT, runtimes, clang pkg.Artifact) {
 			{"COMPILER_RT_BUILD_PROFILE", "OFF"},
 			{"COMPILER_RT_BUILD_XRAY", "OFF"},
 		},
-		append: []string{"compiler-rt"},
+		Script: `
-		nonStage0: []pkg.Artifact{
-			muslHeaders,
-		},
-		script: `
 mkdir -p "/work/system/lib/clang/` + llvmVersionMajor + `/lib/"
 ln -s \
 	"../../../${ROSA_TRIPLE}" \
@@ -274,286 +66,179 @@ ln -s \
 	"clang_rt.crtend-` + linuxArch() + `.o" \
 	"/work/system/lib/${ROSA_TRIPLE}/crtendS.o"
 `,
-	})
-
-	musl, _ = t.newMusl(false, stage0ExclConcat(t, []string{
-		"CC=clang",
-		"LIBCC=/system/lib/clang/" + llvmVersionMajor + "/lib/" +
-			triplet() + "/libclang_rt.builtins.a",
-		"AR=ar",
-		"RANLIB=ranlib",
 	},
-		"LDFLAGS="+earlyLDFLAGS(false),
+		Python,
-	), compilerRT)
 
-	runtimes = t.newLLVMVariant("runtimes", &llvmAttr{
+		KernelHeaders,
-		env: stage0ExclConcat(t, []string{},
+	), llvmVersion
+}
+func init() {
+	artifactsM[CompilerRT] = Metadata{
+		f: Toolchain.newCompilerRT,
+
+		Name:        "compiler-rt",
+		Description: "LLVM runtime: compiler-rt",
+		Website:     "https://llvm.org/",
+
+		Dependencies: P{
+			Musl,
+		},
+	}
+}
+
+func (t Toolchain) newLLVMRuntimes() (pkg.Artifact, string) {
+	return t.NewPackage("llvm-runtimes", llvmVersion, t.Load(llvmSource), &PackageAttr{
+		NonStage0: t.AppendPresets(nil, CompilerRT),
+		Env: stage0ExclConcat(t, []string{},
 			"LDFLAGS="+earlyLDFLAGS(false),
 		),
-		pr: llvmRuntimeLibunwind | llvmRuntimeLibcxx | llvmRuntimeLibcxxABI,
+		Flag: TExclusive,
-		cmake: slices.Concat([]KV{
+	}, &CMakeHelper{
+		Append: []string{"runtimes"},
+
+		Cache: []KV{
+			{"CMAKE_BUILD_TYPE", "Release"},
+
+			{"LLVM_HOST_TRIPLE", `"${ROSA_TRIPLE}"`},
+			{"LLVM_DEFAULT_TARGET_TRIPLE", `"${ROSA_TRIPLE}"`},
+			{"LLVM_ENABLE_RUNTIMES", "'libunwind;libcxx;libcxxabi'"},
+
+			{"LIBUNWIND_USE_COMPILER_RT", "ON"},
+			{"LIBCXX_HAS_MUSL_LIBC", "ON"},
+			{"LIBCXX_USE_COMPILER_RT", "ON"},
+			{"LIBCXXABI_USE_COMPILER_RT", "ON"},
+			{"LIBCXXABI_USE_LLVM_UNWINDER", "ON"},
+
 			// libc++ not yet available
 			{"CMAKE_CXX_COMPILER_WORKS", "ON"},
 
 			{"LIBCXX_HAS_ATOMIC_LIB", "OFF"},
 			{"LIBCXXABI_HAS_CXA_THREAD_ATEXIT_IMPL", "OFF"},
-		}, minimalDeps),
+
-		append: []string{"runtimes"},
+			{"LLVM_ENABLE_ZLIB", "OFF"},
-		nonStage0: []pkg.Artifact{
+			{"LLVM_ENABLE_ZSTD", "OFF"},
-			compilerRT,
+			{"LLVM_ENABLE_LIBXML2", "OFF"},
-			musl,
 		},
-	})
+	},
+		Python,
 
-	clang = t.newLLVMVariant("clang", &llvmAttr{
+		KernelHeaders,
-		pr: llvmProjectClang | llvmProjectLld,
+	), llvmVersion
-		env: stage0ExclConcat(t, []string{},
-			"CFLAGS="+earlyCFLAGS,
-			"CXXFLAGS="+earlyCXXFLAGS(),
-			"LDFLAGS="+earlyLDFLAGS(false),
-		),
-		cmake: slices.Concat([]KV{
-			{"LLVM_TARGETS_TO_BUILD", target},
-			{"CMAKE_CROSSCOMPILING", "OFF"},
-			{"CXX_SUPPORTS_CUSTOM_LINKER", "ON"},
-		}, minimalDeps),
-		nonStage0: []pkg.Artifact{
-			musl,
-			compilerRT,
-			runtimes,
-		},
-		script: `
-ln -s clang /work/system/bin/cc
-ln -s clang++ /work/system/bin/c++
-
-ninja check-all
-`,
-
-		patches: []KV{
-			{"add-rosa-vendor", `diff --git a/llvm/include/llvm/TargetParser/Triple.h b/llvm/include/llvm/TargetParser/Triple.h
-index 9c83abeeb3b1..5acfe5836a23 100644
---- a/llvm/include/llvm/TargetParser/Triple.h
-+++ b/llvm/include/llvm/TargetParser/Triple.h
-@@ -190,6 +190,7 @@ public:
- 
-     Apple,
-     PC,
-+    Rosa,
-     SCEI,
-     Freescale,
-     IBM,
-diff --git a/llvm/lib/TargetParser/Triple.cpp b/llvm/lib/TargetParser/Triple.cpp
-index a4f9dd42c0fe..cb5a12387034 100644
---- a/llvm/lib/TargetParser/Triple.cpp
-+++ b/llvm/lib/TargetParser/Triple.cpp
-@@ -279,6 +279,7 @@ StringRef Triple::getVendorTypeName(VendorType Kind) {
-   case NVIDIA: return "nvidia";
-   case OpenEmbedded: return "oe";
-   case PC: return "pc";
-+  case Rosa: return "rosa";
-   case SCEI: return "scei";
-   case SUSE: return "suse";
-   case Meta:
-@@ -689,6 +690,7 @@ static Triple::VendorType parseVendor(StringRef VendorName) {
-   return StringSwitch<Triple::VendorType>(VendorName)
-       .Case("apple", Triple::Apple)
-       .Case("pc", Triple::PC)
-+      .Case("rosa", Triple::Rosa)
-       .Case("scei", Triple::SCEI)
-       .Case("sie", Triple::SCEI)
-       .Case("fsl", Triple::Freescale)
-`},
-
-			{"xfail-broken-tests", `diff --git a/clang/test/Modules/timestamps.c b/clang/test/Modules/timestamps.c
-index 50fdce630255..4b4465a75617 100644
---- a/clang/test/Modules/timestamps.c
-+++ b/clang/test/Modules/timestamps.c
-@@ -1,3 +1,5 @@
-+// XFAIL: target={{.*-rosa-linux-musl}}
-+
- /// Verify timestamps that gets embedded in the module
- #include <c-header.h>
- 
-`},
-
-			{"path-system-include", `diff --git a/clang/lib/Driver/ToolChains/Linux.cpp b/clang/lib/Driver/ToolChains/Linux.cpp
-index 8ac8d4eb9181..e46b04a898ca 100644
---- a/clang/lib/Driver/ToolChains/Linux.cpp
-+++ b/clang/lib/Driver/ToolChains/Linux.cpp
-@@ -671,6 +671,12 @@ void Linux::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
-     addExternCSystemInclude(
-         DriverArgs, CC1Args,
-         concat(SysRoot, "/usr/include", MultiarchIncludeDir));
-+  if (!MultiarchIncludeDir.empty() &&
-+      D.getVFS().exists(concat(SysRoot, "/system/include", MultiarchIncludeDir)))
-+    addExternCSystemInclude(
-+        DriverArgs, CC1Args,
-+        concat(SysRoot, "/system/include", MultiarchIncludeDir));
-+
- 
-   if (getTriple().getOS() == llvm::Triple::RTEMS)
-     return;
-@@ -681,6 +687,7 @@ void Linux::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
-   addExternCSystemInclude(DriverArgs, CC1Args, concat(SysRoot, "/include"));
- 
-   addExternCSystemInclude(DriverArgs, CC1Args, concat(SysRoot, "/usr/include"));
-+  addExternCSystemInclude(DriverArgs, CC1Args, concat(SysRoot, "/system/include"));
- 
-   if (!DriverArgs.hasArg(options::OPT_nobuiltininc) && getTriple().isMusl())
-     addSystemInclude(DriverArgs, CC1Args, ResourceDirInclude);
-`},
-
-			{"path-system-libraries", `diff --git a/clang/lib/Driver/ToolChains/Linux.cpp b/clang/lib/Driver/ToolChains/Linux.cpp
-index 8ac8d4eb9181..f4d1347ab64d 100644
---- a/clang/lib/Driver/ToolChains/Linux.cpp
-+++ b/clang/lib/Driver/ToolChains/Linux.cpp
-@@ -282,6 +282,7 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
-   const bool IsHexagon = Arch == llvm::Triple::hexagon;
-   const bool IsRISCV = Triple.isRISCV();
-   const bool IsCSKY = Triple.isCSKY();
-+  const bool IsRosa = Triple.getVendor() == llvm::Triple::Rosa;
- 
-   if (IsCSKY && !SelectedMultilibs.empty())
-     SysRoot = SysRoot + SelectedMultilibs.back().osSuffix();
-@@ -318,12 +319,23 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
-   const std::string OSLibDir = std::string(getOSLibDir(Triple, Args));
-   const std::string MultiarchTriple = getMultiarchTriple(D, Triple, SysRoot);
- 
-+  if (IsRosa) {
-+    ExtraOpts.push_back("-rpath");
-+    ExtraOpts.push_back("/system/lib");
-+    ExtraOpts.push_back("-rpath");
-+    ExtraOpts.push_back(concat("/system/lib", MultiarchTriple));
-+  }
-+
-   // mips32: Debian multilib, we use /libo32, while in other case, /lib is
-   // used. We need add both libo32 and /lib.
-   if (Arch == llvm::Triple::mips || Arch == llvm::Triple::mipsel) {
-     Generic_GCC::AddMultilibPaths(D, SysRoot, "libo32", MultiarchTriple, Paths);
--    addPathIfExists(D, concat(SysRoot, "/libo32"), Paths);
--    addPathIfExists(D, concat(SysRoot, "/usr/libo32"), Paths);
-+    if (!IsRosa) {
-+      addPathIfExists(D, concat(SysRoot, "/libo32"), Paths);
-+      addPathIfExists(D, concat(SysRoot, "/usr/libo32"), Paths);
-+    } else {
-+      addPathIfExists(D, concat(SysRoot, "/system/libo32"), Paths);
-+    }
-   }
-   Generic_GCC::AddMultilibPaths(D, SysRoot, OSLibDir, MultiarchTriple, Paths);
- 
-@@ -341,18 +353,30 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
-         Paths);
-   }
- 
--  addPathIfExists(D, concat(SysRoot, "/usr/lib", MultiarchTriple), Paths);
--  addPathIfExists(D, concat(SysRoot, "/usr", OSLibDir), Paths);
-+  if (!IsRosa) {
-+    addPathIfExists(D, concat(SysRoot, "/usr/lib", MultiarchTriple), Paths);
-+    addPathIfExists(D, concat(SysRoot, "/usr", OSLibDir), Paths);
-+  } else {
-+    addPathIfExists(D, concat(SysRoot, "/system/lib", MultiarchTriple), Paths);
-+    addPathIfExists(D, concat(SysRoot, "/system", OSLibDir), Paths);
-+  }
-   if (IsRISCV) {
-     StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple);
-     addPathIfExists(D, concat(SysRoot, "/", OSLibDir, ABIName), Paths);
--    addPathIfExists(D, concat(SysRoot, "/usr", OSLibDir, ABIName), Paths);
-+    if (!IsRosa)
-+      addPathIfExists(D, concat(SysRoot, "/usr", OSLibDir, ABIName), Paths);
-+    else
-+      addPathIfExists(D, concat(SysRoot, "/system", OSLibDir, ABIName), Paths);
-   }
- 
-   Generic_GCC::AddMultiarchPaths(D, SysRoot, OSLibDir, Paths);
- 
--  addPathIfExists(D, concat(SysRoot, "/lib"), Paths);
--  addPathIfExists(D, concat(SysRoot, "/usr/lib"), Paths);
-+  if (!IsRosa) {
-+    addPathIfExists(D, concat(SysRoot, "/lib"), Paths);
-+    addPathIfExists(D, concat(SysRoot, "/usr/lib"), Paths);
-+  } else {
-+    addPathIfExists(D, concat(SysRoot, "/system/lib"), Paths);
-+  }
- }
- 
- ToolChain::RuntimeLibType Linux::GetDefaultRuntimeLibType() const {
-@@ -457,6 +481,9 @@ std::string Linux::getDynamicLinker(const ArgList &Args) const {
-     return Triple.isArch64Bit() ? "/system/bin/linker64" : "/system/bin/linker";
-   }
-   if (Triple.isMusl()) {
-+    if (Triple.getVendor() == llvm::Triple::Rosa)
-+      return "/system/bin/linker";
-+
-     std::string ArchName;
-     bool IsArm = false;
- 
-diff --git a/clang/tools/clang-installapi/Options.cpp b/clang/tools/clang-installapi/Options.cpp
-index 64324a3f8b01..15ce70b68217 100644
---- a/clang/tools/clang-installapi/Options.cpp
-+++ b/clang/tools/clang-installapi/Options.cpp
-@@ -515,7 +515,7 @@ bool Options::processFrontendOptions(InputArgList &Args) {
-     FEOpts.FwkPaths = std::move(FrameworkPaths);
- 
-   // Add default framework/library paths.
--  PathSeq DefaultLibraryPaths = {"/usr/lib", "/usr/local/lib"};
-+  PathSeq DefaultLibraryPaths = {"/usr/lib", "/system/lib", "/usr/local/lib"};
-   PathSeq DefaultFrameworkPaths = {"/Library/Frameworks",
-                                    "/System/Library/Frameworks"};
- 
-`},
-		},
-	})
-
-	return
 }
 func init() {
-	artifactsM[LLVMCompilerRT] = Metadata{
-		f: func(t Toolchain) (pkg.Artifact, string) {
-			_, compilerRT, _, _ := t.newLLVM()
-			return compilerRT, llvmVersion
-		},
-
-		Name:        "llvm-compiler-rt",
-		Description: "LLVM runtime: compiler-rt",
-		Website:     "https://llvm.org/",
-	}
-
 	artifactsM[LLVMRuntimes] = Metadata{
-		f: func(t Toolchain) (pkg.Artifact, string) {
+		f: Toolchain.newLLVMRuntimes,
-			_, _, runtimes, _ := t.newLLVM()
-			return runtimes, llvmVersion
-		},
 
 		Name:        "llvm-runtimes",
 		Description: "LLVM runtimes: libunwind, libcxx, libcxxabi",
 		Website:     "https://llvm.org/",
+
+		Dependencies: P{
+			CompilerRT,
+		},
+	}
+}
+
+func (t Toolchain) newClang() (pkg.Artifact, string) {
+	target := "'AArch64;RISCV;X86'"
+	if t.isStage0() {
+		target = "Native"
 	}
 
-	artifactsM[LLVMClang] = Metadata{
+	return t.NewPackage("clang", llvmVersion, t.Load(llvmSource), &PackageAttr{
-		f: func(t Toolchain) (pkg.Artifact, string) {
+		NonStage0: t.AppendPresets(nil, LLVMRuntimes),
-			_, _, _, clang := t.newLLVM()
+		Env: stage0ExclConcat(t, []string{},
-			return clang, llvmVersion
+			"CFLAGS="+earlyCFLAGS,
+			"CXXFLAGS="+earlyCXXFLAGS(),
+			"LDFLAGS="+earlyLDFLAGS(false),
+		),
+		Flag: TExclusive,
+	}, &CMakeHelper{
+		Append: []string{"llvm"},
+
+		Cache: []KV{
+			{"CMAKE_BUILD_TYPE", "Release"},
+
+			{"LLVM_HOST_TRIPLE", `"${ROSA_TRIPLE}"`},
+			{"LLVM_DEFAULT_TARGET_TRIPLE", `"${ROSA_TRIPLE}"`},
+			{"LLVM_ENABLE_PROJECTS", "'clang;lld'"},
+
+			{"LLVM_ENABLE_LIBCXX", "ON"},
+			{"LLVM_USE_LINKER", "lld"},
+
+			{"LLVM_INSTALL_BINUTILS_SYMLINKS", "ON"},
+			{"LLVM_INSTALL_CCTOOLS_SYMLINKS", "ON"},
+
+			{"LLVM_LIT_ARGS", "'--verbose'"},
+
+			{"CLANG_DEFAULT_LINKER", "lld"},
+			{"CLANG_DEFAULT_CXX_STDLIB", "libc++"},
+			{"CLANG_DEFAULT_RTLIB", "compiler-rt"},
+			{"CLANG_DEFAULT_UNWINDLIB", "libunwind"},
+
+			{"LLVM_TARGETS_TO_BUILD", target},
+			{"CMAKE_CROSSCOMPILING", "OFF"},
+			{"CXX_SUPPORTS_CUSTOM_LINKER", "ON"},
+
+			{"LLVM_ENABLE_ZLIB", "OFF"},
+			{"LLVM_ENABLE_ZSTD", "OFF"},
+			{"LLVM_ENABLE_LIBXML2", "OFF"},
 		},
+		Script: `
+ln -s ld.lld /work/system/bin/ld
+
+ln -s clang /work/system/bin/cc
+ln -s clang++ /work/system/bin/c++
+
+ninja ` + jobsFlagE + ` check-all
+`,
+	},
+		Python,
+		Perl,
+		Diffutils,
+		Bash,
+		Gawk,
+		Coreutils,
+		Findutils,
+
+		KernelHeaders,
+	), llvmVersion
+}
+func init() {
+	artifactsM[Clang] = Metadata{
+		f: Toolchain.newClang,
 
 		Name:        "clang",
 		Description: `an "LLVM native" C/C++/Objective-C compiler`,
 		Website:     "https://llvm.org/",
 
-		ID: 1830,
+		Dependencies: P{
+			LLVMRuntimes,
+		},
 	}
 }
 
-var (
+func (t Toolchain) newLibclc() (pkg.Artifact, string) {
-	// llvm stores the result of Toolchain.newLLVM.
+	return t.NewPackage("libclc", llvmVersion, t.Load(llvmSource), nil, &CMakeHelper{
-	llvm [_toolchainEnd][4]pkg.Artifact
+		Append: []string{"libclc"},
-	// llvmOnce is for lazy initialisation of llvm.
-	llvmOnce [_toolchainEnd]sync.Once
-)
 
-// NewLLVM returns LLVM toolchain across multiple [pkg.Artifact].
+		Cache: []KV{
-func (t Toolchain) NewLLVM() (musl, compilerRT, runtimes, clang pkg.Artifact) {
+			{"CMAKE_BUILD_TYPE", "Release"},
-	llvmOnce[t].Do(func() {
+
-		llvm[t][0], llvm[t][1], llvm[t][2], llvm[t][3] = t.newLLVM()
+			{"LLVM_HOST_TRIPLE", `"${ROSA_TRIPLE}"`},
-	})
+			{"LLVM_DEFAULT_TARGET_TRIPLE", `"${ROSA_TRIPLE}"`},
-	return llvm[t][0], llvm[t][1], llvm[t][2], llvm[t][3]
+
+			{"LIBCLC_TARGETS_TO_BUILD", "all"},
+		},
+		Script: "ninja " + jobsFlagE + " test",
+	}), llvmVersion
+}
+func init() {
+	artifactsM[Libclc] = Metadata{
+		f: Toolchain.newLibclc,
+
+		Name:        "libclc",
+		Description: "an open source, BSD/MIT dual licensed implementation of the library requirements of the OpenCL C programming language",
+		Website:     "https://libclc.llvm.org/",
+	}
 }

internal/rosa/llvm_patches_latest.go

@@ -0,0 +1,191 @@
+package rosa
+
+// llvmPatches are centralised patches against latest LLVM monorepo.
+var llvmPatches = []KV{
+	{"increase-stack-size-unconditional", `diff --git a/llvm/lib/Support/Threading.cpp b/llvm/lib/Support/Threading.cpp
+index 9da357a7ebb9..b2931510c1ae 100644
+--- a/llvm/lib/Support/Threading.cpp
++++ b/llvm/lib/Support/Threading.cpp
+@@ -80,7 +80,7 @@ unsigned llvm::ThreadPoolStrategy::compute_thread_count() const {
+ // keyword.
+ #include "llvm/Support/thread.h"
+ 
+-#if defined(__APPLE__)
++#if defined(__APPLE__) || 1
+   // Darwin's default stack size for threads except the main one is only 512KB,
+   // which is not enough for some/many normal LLVM compilations. This implements
+   // the same interface as std::thread but requests the same stack size as the
+`},
+
+	{"add-rosa-vendor", `diff --git a/llvm/include/llvm/TargetParser/Triple.h b/llvm/include/llvm/TargetParser/Triple.h
+index 9c83abeeb3b1..5acfe5836a23 100644
+--- a/llvm/include/llvm/TargetParser/Triple.h
++++ b/llvm/include/llvm/TargetParser/Triple.h
+@@ -190,6 +190,7 @@ public:
+ 
+     Apple,
+     PC,
++    Rosa,
+     SCEI,
+     Freescale,
+     IBM,
+diff --git a/llvm/lib/TargetParser/Triple.cpp b/llvm/lib/TargetParser/Triple.cpp
+index a4f9dd42c0fe..cb5a12387034 100644
+--- a/llvm/lib/TargetParser/Triple.cpp
++++ b/llvm/lib/TargetParser/Triple.cpp
+@@ -279,6 +279,7 @@ StringRef Triple::getVendorTypeName(VendorType Kind) {
+   case NVIDIA: return "nvidia";
+   case OpenEmbedded: return "oe";
+   case PC: return "pc";
++  case Rosa: return "rosa";
+   case SCEI: return "scei";
+   case SUSE: return "suse";
+   case Meta:
+@@ -689,6 +690,7 @@ static Triple::VendorType parseVendor(StringRef VendorName) {
+   return StringSwitch<Triple::VendorType>(VendorName)
+       .Case("apple", Triple::Apple)
+       .Case("pc", Triple::PC)
++      .Case("rosa", Triple::Rosa)
+       .Case("scei", Triple::SCEI)
+       .Case("sie", Triple::SCEI)
+       .Case("fsl", Triple::Freescale)
+`},
+
+	{"xfail-broken-tests", `diff --git a/clang/test/Modules/timestamps.c b/clang/test/Modules/timestamps.c
+index 50fdce630255..4b4465a75617 100644
+--- a/clang/test/Modules/timestamps.c
++++ b/clang/test/Modules/timestamps.c
+@@ -1,3 +1,5 @@
++// XFAIL: target={{.*-rosa-linux-musl}}
++
+ /// Verify timestamps that gets embedded in the module
+ #include <c-header.h>
+ 
+`},
+
+	{"path-system-include", `diff --git a/clang/lib/Driver/ToolChains/Linux.cpp b/clang/lib/Driver/ToolChains/Linux.cpp
+index 8ac8d4eb9181..e46b04a898ca 100644
+--- a/clang/lib/Driver/ToolChains/Linux.cpp
++++ b/clang/lib/Driver/ToolChains/Linux.cpp
+@@ -671,6 +671,12 @@ void Linux::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
+     addExternCSystemInclude(
+         DriverArgs, CC1Args,
+         concat(SysRoot, "/usr/include", MultiarchIncludeDir));
++  if (!MultiarchIncludeDir.empty() &&
++      D.getVFS().exists(concat(SysRoot, "/system/include", MultiarchIncludeDir)))
++    addExternCSystemInclude(
++        DriverArgs, CC1Args,
++        concat(SysRoot, "/system/include", MultiarchIncludeDir));
++
+ 
+   if (getTriple().getOS() == llvm::Triple::RTEMS)
+     return;
+@@ -681,6 +687,7 @@ void Linux::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
+   addExternCSystemInclude(DriverArgs, CC1Args, concat(SysRoot, "/include"));
+ 
+   addExternCSystemInclude(DriverArgs, CC1Args, concat(SysRoot, "/usr/include"));
++  addExternCSystemInclude(DriverArgs, CC1Args, concat(SysRoot, "/system/include"));
+ 
+   if (!DriverArgs.hasArg(options::OPT_nobuiltininc) && getTriple().isMusl())
+     addSystemInclude(DriverArgs, CC1Args, ResourceDirInclude);
+`},
+
+	{"path-system-libraries", `diff --git a/clang/lib/Driver/ToolChains/Linux.cpp b/clang/lib/Driver/ToolChains/Linux.cpp
+index 8ac8d4eb9181..f4d1347ab64d 100644
+--- a/clang/lib/Driver/ToolChains/Linux.cpp
++++ b/clang/lib/Driver/ToolChains/Linux.cpp
+@@ -282,6 +282,7 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
+   const bool IsHexagon = Arch == llvm::Triple::hexagon;
+   const bool IsRISCV = Triple.isRISCV();
+   const bool IsCSKY = Triple.isCSKY();
++  const bool IsRosa = Triple.getVendor() == llvm::Triple::Rosa;
+ 
+   if (IsCSKY && !SelectedMultilibs.empty())
+     SysRoot = SysRoot + SelectedMultilibs.back().osSuffix();
+@@ -318,12 +319,23 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
+   const std::string OSLibDir = std::string(getOSLibDir(Triple, Args));
+   const std::string MultiarchTriple = getMultiarchTriple(D, Triple, SysRoot);
+ 
++  if (IsRosa) {
++    ExtraOpts.push_back("-rpath");
++    ExtraOpts.push_back("/system/lib");
++    ExtraOpts.push_back("-rpath");
++    ExtraOpts.push_back(concat("/system/lib", MultiarchTriple));
++  }
++
+   // mips32: Debian multilib, we use /libo32, while in other case, /lib is
+   // used. We need add both libo32 and /lib.
+   if (Arch == llvm::Triple::mips || Arch == llvm::Triple::mipsel) {
+     Generic_GCC::AddMultilibPaths(D, SysRoot, "libo32", MultiarchTriple, Paths);
+-    addPathIfExists(D, concat(SysRoot, "/libo32"), Paths);
+-    addPathIfExists(D, concat(SysRoot, "/usr/libo32"), Paths);
++    if (!IsRosa) {
++      addPathIfExists(D, concat(SysRoot, "/libo32"), Paths);
++      addPathIfExists(D, concat(SysRoot, "/usr/libo32"), Paths);
++    } else {
++      addPathIfExists(D, concat(SysRoot, "/system/libo32"), Paths);
++    }
+   }
+   Generic_GCC::AddMultilibPaths(D, SysRoot, OSLibDir, MultiarchTriple, Paths);
+ 
+@@ -341,18 +353,30 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
+         Paths);
+   }
+ 
+-  addPathIfExists(D, concat(SysRoot, "/usr/lib", MultiarchTriple), Paths);
+-  addPathIfExists(D, concat(SysRoot, "/usr", OSLibDir), Paths);
++  if (!IsRosa) {
++    addPathIfExists(D, concat(SysRoot, "/usr/lib", MultiarchTriple), Paths);
++    addPathIfExists(D, concat(SysRoot, "/usr", OSLibDir), Paths);
++  } else {
++    addPathIfExists(D, concat(SysRoot, "/system/lib", MultiarchTriple), Paths);
++    addPathIfExists(D, concat(SysRoot, "/system", OSLibDir), Paths);
++  }
+   if (IsRISCV) {
+     StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple);
+     addPathIfExists(D, concat(SysRoot, "/", OSLibDir, ABIName), Paths);
+-    addPathIfExists(D, concat(SysRoot, "/usr", OSLibDir, ABIName), Paths);
++    if (!IsRosa)
++      addPathIfExists(D, concat(SysRoot, "/usr", OSLibDir, ABIName), Paths);
++    else
++      addPathIfExists(D, concat(SysRoot, "/system", OSLibDir, ABIName), Paths);
+   }
+ 
+   Generic_GCC::AddMultiarchPaths(D, SysRoot, OSLibDir, Paths);
+ 
+-  addPathIfExists(D, concat(SysRoot, "/lib"), Paths);
+-  addPathIfExists(D, concat(SysRoot, "/usr/lib"), Paths);
++  if (!IsRosa) {
++    addPathIfExists(D, concat(SysRoot, "/lib"), Paths);
++    addPathIfExists(D, concat(SysRoot, "/usr/lib"), Paths);
++  } else {
++    addPathIfExists(D, concat(SysRoot, "/system/lib"), Paths);
++  }
+ }
+ 
+ ToolChain::RuntimeLibType Linux::GetDefaultRuntimeLibType() const {
+@@ -457,6 +481,9 @@ std::string Linux::getDynamicLinker(const ArgList &Args) const {
+     return Triple.isArch64Bit() ? "/system/bin/linker64" : "/system/bin/linker";
+   }
+   if (Triple.isMusl()) {
++    if (Triple.getVendor() == llvm::Triple::Rosa)
++      return "/system/bin/linker";
++
+     std::string ArchName;
+     bool IsArm = false;
+ 
+diff --git a/clang/tools/clang-installapi/Options.cpp b/clang/tools/clang-installapi/Options.cpp
+index 64324a3f8b01..15ce70b68217 100644
+--- a/clang/tools/clang-installapi/Options.cpp
++++ b/clang/tools/clang-installapi/Options.cpp
+@@ -515,7 +515,7 @@ bool Options::processFrontendOptions(InputArgList &Args) {
+     FEOpts.FwkPaths = std::move(FrameworkPaths);
+ 
+   // Add default framework/library paths.
+-  PathSeq DefaultLibraryPaths = {"/usr/lib", "/usr/local/lib"};
++  PathSeq DefaultLibraryPaths = {"/usr/lib", "/system/lib", "/usr/local/lib"};
+   PathSeq DefaultFrameworkPaths = {"/Library/Frameworks",
+                                    "/System/Library/Frameworks"};
+ 
+`},
+}

internal/rosa/make.go

@@ -20,9 +20,9 @@ cd "$(mktemp -d)"
 	--disable-dependency-tracking
 ./build.sh
 ./make DESTDIR=/work install check
-`, pkg.Path(AbsUsrSrc.Append("make"), false, pkg.NewHTTPGetTar(
+`, pkg.Path(AbsUsrSrc.Append("make"), false, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/make/make-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/make/make-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	))), version
 }
@@ -78,11 +78,6 @@ type MakeHelper struct {
 
 var _ Helper = new(MakeHelper)
 
-// name returns its arguments joined with '-'.
-func (*MakeHelper) name(name, version string) string {
-	return name + "-" + version
-}
-
 // extra returns make and other optional dependencies.
 func (attr *MakeHelper) extra(flag int) P {
 	extra := P{Make}
@@ -176,7 +171,10 @@ func (attr *MakeHelper) script(name string) string {
 							s = "-" + s
 						}
 						if v[1] != "" {
-							s += "=" + v[1]
+							if v[0] != "" {
+								s += "="
+							}
+							s += v[1]
 						}
 						if !yield(s) {
 							return
@@ -190,7 +188,7 @@ func (attr *MakeHelper) script(name string) string {
 
 	scriptMake := `
 make \
-	"-j$(nproc)"`
+	` + jobsFlagE
 	if len(attr.Make) > 0 {
 		scriptMake += " \\\n\t" + strings.Join(attr.Make, " \\\n\t")
 	}
@@ -198,7 +196,7 @@ make \
 
 	if !attr.SkipCheck {
 		scriptMake += attr.ScriptCheckEarly + `make \
-	"-j$(nproc)" \
+	` + jobsFlagE + ` \
 	`
 		if len(attr.Check) > 0 {
 			scriptMake += strings.Join(attr.Check, " \\\n\t")

internal/rosa/mesa.go

@@ -0,0 +1,66 @@
+package rosa
+
+import "hakurei.app/internal/pkg"
+
+func (t Toolchain) newLibglvnd() (pkg.Artifact, string) {
+	const (
+		version  = "1.7.0"
+		checksum = "eIQJK2sgFQDHdeFkQO87TrSUaZRFG4y2DrwA8Ut-sGboI59uw1OOiIVqq2AIwnGY"
+	)
+	return t.NewPackage("libglvnd", version, newFromGitLab(
+		"gitlab.freedesktop.org",
+		"glvnd/libglvnd",
+		"v"+version,
+		checksum,
+	), nil, (*MesonHelper)(nil),
+		Binutils, // symbols check fail with llvm nm
+	), version
+}
+func init() {
+	artifactsM[Libglvnd] = Metadata{
+		f: Toolchain.newLibglvnd,
+
+		Name:        "libglvnd",
+		Description: "The GL Vendor-Neutral Dispatch library",
+		Website:     "https://gitlab.freedesktop.org/glvnd/libglvnd",
+
+		ID: 12098,
+	}
+}
+
+func (t Toolchain) newLibdrm() (pkg.Artifact, string) {
+	const (
+		version  = "2.4.131"
+		checksum = "riHPSpvTnvCPbR-iT4jt7_X-z4rpwm6oNh9ZN2zP6RBFkFVxBRKmedG4eEXSADIh"
+	)
+	return t.NewPackage("libdrm", version, newFromGitLab(
+		"gitlab.freedesktop.org",
+		"mesa/libdrm",
+		"libdrm-"+version,
+		checksum,
+	), nil, &MesonHelper{
+		Setup: []KV{
+			{"Dintel", "enabled"},
+		},
+	},
+		Binutils, // symbols check fail with llvm nm
+
+		Libpciaccess,
+		KernelHeaders,
+	), version
+}
+func init() {
+	artifactsM[Libdrm] = Metadata{
+		f: Toolchain.newLibdrm,
+
+		Name:        "libdrm",
+		Description: "a userspace library for accessing the DRM",
+		Website:     "https://dri.freedesktop.org/",
+
+		Dependencies: P{
+			Libpciaccess,
+		},
+
+		ID: 1596,
+	}
+}

internal/rosa/meson.go

@@ -9,8 +9,8 @@ import (
 
 func (t Toolchain) newMeson() (pkg.Artifact, string) {
 	const (
-		version  = "1.10.2"
+		version  = "1.11.0"
-		checksum = "18VmKUVKuXCwtawkYCeYHseC3cKpi86OhnIPaV878wjY0rkXH8XnQwUyymnxFgcl"
+		checksum = "b7oo3U_cklhzsTfsyYsjPGyeEufiS-Pm06JPLzodseS125Ach62ZBly7R6dSDiAc"
 	)
 	return t.New("meson-"+version, 0, []pkg.Artifact{
 		t.Load(Zlib),
@@ -23,10 +23,11 @@ python3 setup.py \
 	install \
 	--prefix=/system \
 	--root=/work
-`, pkg.Path(AbsUsrSrc.Append("meson"), true, pkg.NewHTTPGetTar(
+`, pkg.Path(AbsUsrSrc.Append("meson"), true, newFromGitHubRelease(
-		nil, "https://github.com/mesonbuild/meson/releases/download/"+
+		"mesonbuild/meson",
-			version+"/meson-"+version+".tar.gz",
+		version,
-		mustDecode(checksum),
+		"meson-"+version+".tar.gz",
+		checksum,
 		pkg.TarGzip,
 	))), version
 }
@@ -66,11 +67,6 @@ type MesonHelper struct {
 
 var _ Helper = new(MesonHelper)
 
-// name returns its arguments joined with '-'.
-func (*MesonHelper) name(name, version string) string {
-	return name + "-" + version
-}
-
 // extra returns hardcoded meson runtime dependencies.
 func (*MesonHelper) extra(int) P { return P{Meson} }
 

internal/rosa/mksh.go

@@ -26,10 +26,9 @@ cp -v lksh /work/system/bin/sh
 
 mkdir -p /work/bin/
 ln -vs ../system/bin/sh /work/bin/
-`, pkg.Path(AbsUsrSrc.Append("mksh"), false, pkg.NewHTTPGetTar(
+`, pkg.Path(AbsUsrSrc.Append("mksh"), false, newTar(
-		nil,
 		"https://mbsd.evolvis.org/MirOS/dist/mir/mksh/mksh-R"+version+".tgz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	))), version
 }

internal/rosa/musl-fts.go

@@ -7,11 +7,10 @@ func (t Toolchain) newMuslFts() (pkg.Artifact, string) {
 		version  = "1.2.7"
 		checksum = "N_p_ZApX3eHt7xoDCw1hLf6XdJOw7ZSx7xPvpvAP0knG2zgU0zeN5w8tt5Pg60XJ"
 	)
-	return t.NewPackage("musl-fts", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("musl-fts", version, newFromGitHub(
-		nil, "https://github.com/void-linux/musl-fts/archive/refs/tags/"+
+		"void-linux/musl-fts",
-			"v"+version+".tar.gz",
+		"v"+version,
-		mustDecode(checksum),
+		checksum,
-		pkg.TarGzip,
 	), &PackageAttr{
 		Env: []string{
 			"CC=cc -fPIC",

internal/rosa/musl-obstack.go

@@ -7,11 +7,10 @@ func (t Toolchain) newMuslObstack() (pkg.Artifact, string) {
 		version  = "1.2.3"
 		checksum = "tVRY_KjIlkkMszcaRlkKdBVQHIXTT_T_TiMxbwErlILXrOBosocg8KklppZhNdCG"
 	)
-	return t.NewPackage("musl-obstack", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("musl-obstack", version, newFromGitHub(
-		nil, "https://github.com/void-linux/musl-obstack/archive/refs/tags/"+
+		"void-linux/musl-obstack",
-			"v"+version+".tar.gz",
+		"v"+version,
-		mustDecode(checksum),
+		checksum,
-		pkg.TarGzip,
 	), &PackageAttr{
 		Env: []string{
 			"CC=cc -fPIC",

internal/rosa/musl.go

@@ -4,7 +4,6 @@ import "hakurei.app/internal/pkg"
 
 func (t Toolchain) newMusl(
 	headers bool,
-	env []string,
 	extra ...pkg.Artifact,
 ) (pkg.Artifact, string) {
 	const (
@@ -37,9 +36,9 @@ rmdir -v /work/lib
 		helper.Script = ""
 	}
 
-	return t.NewPackage(name, version, pkg.NewHTTPGetTar(
+	return t.NewPackage(name, version, newTar(
-		nil, "https://musl.libc.org/releases/musl-"+version+".tar.gz",
+		"https://musl.libc.org/releases/musl-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		NonStage0: extra,
@@ -47,7 +46,15 @@ rmdir -v /work/lib
 		// expected to be writable in copies
 		Chmod: true,
 
-		Env: env,
+		Env: stage0ExclConcat(t, []string{
+			"CC=clang",
+			"LIBCC=/system/lib/clang/" + llvmVersionMajor + "/lib/" +
+				triplet() + "/libclang_rt.builtins.a",
+			"AR=ar",
+			"RANLIB=ranlib",
+		},
+			"LDFLAGS="+earlyLDFLAGS(false),
+		),
 	}, &helper,
 		Coreutils,
 	), version
@@ -55,7 +62,7 @@ rmdir -v /work/lib
 func init() {
 	artifactsM[Musl] = Metadata{
 		f: func(t Toolchain) (pkg.Artifact, string) {
-			return t.newMusl(false, nil)
+			return t.newMusl(false, t.Load(CompilerRT))
 		},
 
 		Name:        "musl",

internal/rosa/ncurses.go

@@ -7,9 +7,9 @@ func (t Toolchain) newNcurses() (pkg.Artifact, string) {
 		version  = "6.6"
 		checksum = "XvWp4xi6hR_hH8XUoGY26L_pqBSDapJYulhzZqPuR0KNklqypqNc1yNXU-nOjf5w"
 	)
-	return t.NewPackage("ncurses", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("ncurses", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/ncurses/ncurses-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/ncurses/ncurses-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, &MakeHelper{
 		// "tests" are actual demo programs, not a test suite.

internal/rosa/netfilter.go

@@ -7,10 +7,10 @@ func (t Toolchain) newLibmnl() (pkg.Artifact, string) {
 		version  = "1.0.5"
 		checksum = "DN-vbbvQDpxXJm0TJ6xlluILvfrB86avrCTX50XyE9SEFSAZ_o8nuKc5Gu0Am7-u"
 	)
-	return t.NewPackage("libmnl", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("libmnl", version, newTar(
-		nil, "https://www.netfilter.org/projects/libmnl/files/"+
+		"https://www.netfilter.org/projects/libmnl/files/"+
 			"libmnl-"+version+".tar.bz2",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarBzip2,
 	), &PackageAttr{
 		Patches: []KV{
@@ -55,10 +55,9 @@ func (t Toolchain) newLibnftnl() (pkg.Artifact, string) {
 		version  = "1.3.1"
 		checksum = "91ou66K-I17iX6DB6hiQkhhC_v4DFW5iDGzwjVRNbJNEmKqowLZBlh3FY-ZDO0r9"
 	)
-	return t.NewPackage("libnftnl", version, t.NewViaGit(
+	return t.NewPackage("libnftnl", version, t.newTagRemote(
 		"https://git.netfilter.org/libnftnl",
-		"refs/tags/libnftnl-"+version,
+		"libnftnl-"+version, checksum,
-		mustDecode(checksum),
 	), &PackageAttr{
 		Env: []string{
 			"CFLAGS=-D_GNU_SOURCE",
@@ -98,10 +97,9 @@ func (t Toolchain) newIPTables() (pkg.Artifact, string) {
 		version  = "1.8.13"
 		checksum = "TUA-cFIAsiMvtRR-XzQvXzoIhJUOc9J2gQDJCbBRjmgmVfGfPTCf58wL7e-cUKVQ"
 	)
-	return t.NewPackage("iptables", version, t.NewViaGit(
+	return t.NewPackage("iptables", version, t.newTagRemote(
 		"https://git.netfilter.org/iptables",
-		"refs/tags/v"+version,
+		"v"+version, checksum,
-		mustDecode(checksum),
 	), &PackageAttr{
 		ScriptEarly: `
 rm \

internal/rosa/nettle.go

@@ -7,9 +7,9 @@ func (t Toolchain) newNettle() (pkg.Artifact, string) {
 		version  = "4.0"
 		checksum = "6agC-vHzzoqAlaX3K9tX8yHgrm03HLqPZzVzq8jh_ePbuPMIvpxereu_uRJFmQK7"
 	)
-	return t.NewPackage("nettle", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("nettle", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/nettle/nettle-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/nettle/nettle-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, (*MakeHelper)(nil),
 		M4,

internal/rosa/nettle3.go

@@ -7,9 +7,9 @@ func (t Toolchain) newNettle3() (pkg.Artifact, string) {
 		version  = "3.10.2"
 		checksum = "07aXlj10X5llf67jIqRQAA1pgLSgb0w_JYggZVPuKNoc-B-_usb5Kr8FrfBe7g1S"
 	)
-	return t.NewPackage("nettle", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("nettle", version, newTar(
-		nil, "https://ftpmirror.gnu.org/gnu/nettle/nettle-"+version+".tar.gz",
+		"https://ftpmirror.gnu.org/gnu/nettle/nettle-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, (*MakeHelper)(nil),
 		M4,

internal/rosa/ninja.go

@@ -13,25 +13,26 @@ func (t Toolchain) newNinja() (pkg.Artifact, string) {
 	}, nil, nil, `
 cd "$(mktemp -d)"
 python3 /usr/src/ninja/configure.py \
+	--verbose \
 	--bootstrap \
 	--gtest-source-dir=/usr/src/googletest
-./ninja all
+./ninja `+jobsFlagE+` all
 ./ninja_test
 
 mkdir -p /work/system/bin/
 cp ninja /work/system/bin/
 `, pkg.Path(AbsUsrSrc.Append("googletest"), false,
-		pkg.NewHTTPGetTar(
+		newFromGitHubRelease(
-			nil, "https://github.com/google/googletest/releases/download/"+
+			"google/googletest",
-				"v1.16.0/googletest-1.16.0.tar.gz",
+			"v1.16.0",
-			mustDecode("NjLGvSbgPy_B-y-o1hdanlzEzaYeStFcvFGxpYV3KYlhrWWFRcugYhM3ZMzOA9B_"),
+			"googletest-1.16.0.tar.gz",
+			"NjLGvSbgPy_B-y-o1hdanlzEzaYeStFcvFGxpYV3KYlhrWWFRcugYhM3ZMzOA9B_",
 			pkg.TarGzip,
 		)), pkg.Path(AbsUsrSrc.Append("ninja"), true, t.NewPatchedSource(
-		"ninja", version, pkg.NewHTTPGetTar(
+		"ninja", version, newFromGitHub(
-			nil, "https://github.com/ninja-build/ninja/archive/refs/tags/"+
+			"ninja-build/ninja",
-				"v"+version+".tar.gz",
+			"v"+version,
-			mustDecode(checksum),
+			checksum,
-			pkg.TarGzip,
 		), false,
 	))), version
 }

internal/rosa/nss.go

@@ -8,17 +8,16 @@ import (
 
 func (t Toolchain) newNSS() (pkg.Artifact, string) {
 	const (
-		version  = "3.122"
+		version  = "3.123"
-		checksum = "QvC6TBO4BAUEh6wmgUrb1hwH5podQAN-QdcAaWL32cWEppmZs6oKkZpD9GvZf59S"
+		checksum = "pwBz0FO8jmhejPblfzNQLGsqBBGT0DwAw-z9yBJH3V3hVJBMKSc1l0R8GC0_BnzF"
 
 		version0  = "4_38_2"
 		checksum0 = "25x2uJeQnOHIiq_zj17b4sYqKgeoU8-IsySUptoPcdHZ52PohFZfGuIisBreWzx0"
 	)
-	return t.NewPackage("nss", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("nss", version, newFromGitHub(
-		nil, "https://github.com/nss-dev/nss/archive/refs/tags/"+
+		"nss-dev/nss",
-			"NSS_"+strings.Join(strings.SplitN(version, ".", 2), "_")+"_RTM.tar.gz",
+		"NSS_"+strings.Join(strings.SplitN(version, ".", 3), "_")+"_RTM",
-		mustDecode(checksum),
+		checksum,
-		pkg.TarGzip,
 	), &PackageAttr{
 		Paths: []pkg.ExecPath{
 			pkg.Path(AbsUsrSrc.Append("nspr.zip"), false, pkg.NewHTTPGet(
@@ -83,16 +82,30 @@ func init() {
 	}
 }
 
-func init() {
+func (t Toolchain) newBuildCATrust() (pkg.Artifact, string) {
-	const version = "0.4.0"
+	const (
-	artifactsM[buildcatrust] = newViaPip(
+		version  = "0.5.1"
-		"buildcatrust",
+		checksum = "g9AqIksz-hvCUceSR7ZKwfqf8Y_UsJU_3_zLUIdc4IkxFVkgdv9kKVvhFjE4s1-7"
-		"transform certificate stores between formats",
-		version, "py3", "none", "any",
-		"k_FGzkRCLjbTWBkuBLzQJ1S8FPAz19neJZlMHm0t10F2Y0hElmvVwdSBRc03Rjo1",
-		"https://github.com/nix-community/buildcatrust/"+
-			"releases/download/v"+version+"/",
 	)
+	return t.newViaPip("buildcatrust", version,
+		"https://github.com/nix-community/buildcatrust/releases/"+
+			"download/v"+version+"/buildcatrust-"+version+"-py3-none-any.whl",
+		checksum), version
+}
+func init() {
+	artifactsM[buildcatrust] = Metadata{
+		f: Toolchain.newBuildCATrust,
+
+		Name:        "buildcatrust",
+		Description: "transform certificate stores between formats",
+		Website:     "https://github.com/nix-community/buildcatrust",
+
+		Dependencies: P{
+			Python,
+		},
+
+		ID: 233988,
+	}
 }
 
 func (t Toolchain) newNSSCACert() (pkg.Artifact, string) {

internal/rosa/openssl.go

@@ -7,10 +7,11 @@ func (t Toolchain) newOpenSSL() (pkg.Artifact, string) {
 		version  = "3.6.2"
 		checksum = "jH004dXTiE01Hp0kyShkWXwrSHEksZi4i_3v47D9H9Uz9LQ1aMwF7mrl2Tb4t_XA"
 	)
-	return t.NewPackage("openssl", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("openssl", version, newFromGitHubRelease(
-		nil, "https://github.com/openssl/openssl/releases/download/"+
+		"openssl/openssl",
-			"openssl-"+version+"/openssl-"+version+".tar.gz",
+		"openssl-"+version,
-		mustDecode(checksum),
+		"openssl-"+version+".tar.gz",
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		Env: []string{
@@ -24,9 +25,10 @@ func (t Toolchain) newOpenSSL() (pkg.Artifact, string) {
 			{"prefix", "/system"},
 			{"libdir", "lib"},
 			{"openssldir", "etc/ssl"},
+			{"", "no-docs"},
 		},
 		Check: []string{
-			`HARNESS_JOBS="$(expr "$(nproc)" '*' 2)"`,
+			"HARNESS_JOBS=" + jobsE,
 			"test",
 		},
 	},

internal/rosa/p11.go

@@ -7,9 +7,9 @@ func (t Toolchain) newP11Kit() (pkg.Artifact, string) {
 		version  = "0.26.2"
 		checksum = "3ei-6DUVtYzrRVe-SubtNgRlweXd6H2qHmUu-_5qVyIn6gSTvZbGS2u79Y8IFb2N"
 	)
-	return t.NewPackage("p11-kit", version, t.NewViaGit(
+	return t.NewPackage("p11-kit", version, t.newTagRemote(
 		"https://github.com/p11-glue/p11-kit.git",
-		"refs/tags/"+version, mustDecode(checksum),
+		version, checksum,
 	), nil, &MesonHelper{
 		Setup: []KV{
 			{"Dsystemd", "disabled"},

internal/rosa/pcre2.go

@@ -9,10 +9,11 @@ func (t Toolchain) newPCRE2() (pkg.Artifact, string) {
 		version  = "10.47"
 		checksum = "IbC24vVayju6nB9EhrBPSDexk22wDecdpyrjgC3nCZXkwTnUjq4CD2q5sopqu6CW"
 	)
-	return t.NewPackage("pcre2", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("pcre2", version, newFromGitHubRelease(
-		nil, "https://github.com/PCRE2Project/pcre2/releases/download/"+
+		"PCRE2Project/pcre2",
-			"pcre2-"+version+"/pcre2-"+version+".tar.bz2",
+		"pcre2-"+version,
-		mustDecode(checksum),
+		"pcre2-"+version+".tar.bz2",
+		checksum,
 		pkg.TarBzip2,
 	), &PackageAttr{
 		ScriptEarly: `

internal/rosa/perl.go

@@ -2,6 +2,7 @@ package rosa
 
 import (
 	"slices"
+	"strings"
 
 	"hakurei.app/internal/pkg"
 )
@@ -11,9 +12,9 @@ func (t Toolchain) newPerl() (pkg.Artifact, string) {
 		version  = "5.42.2"
 		checksum = "Me_xFfgkRnVyG0sE6a74TktK2OUq9Z1LVJNEu_9RdZG3S2fbjfzNiuk2SJqHAgbm"
 	)
-	return t.NewPackage("perl", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("perl", version, newTar(
-		nil, "https://www.cpan.org/src/5.0/perl-"+version+".tar.gz",
+		"https://www.cpan.org/src/5.0/perl-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		// uses source tree as scratch space
@@ -42,7 +43,7 @@ rm -f /system/bin/ps # perl does not like toybox ps
 			{"Duseshrplib"},
 		},
 		Check: []string{
-			"TEST_JOBS=256",
+			"TEST_JOBS=" + jobsLE,
 			"test_harness",
 		},
 		Install: `LD_LIBRARY_PATH="$PWD" ./perl -Ilib -I. installperl --destdir=/work`,
@@ -91,10 +92,10 @@ func (t Toolchain) newPerlModuleBuild() (pkg.Artifact, string) {
 		version  = "0.4234"
 		checksum = "ZKxEFG4hE1rqZt52zBL2LRZBMkYzhjb5-cTBXcsyA52EbPeeYyVxU176yAea8-Di"
 	)
-	return t.newViaPerlModuleBuild("Module-Build", version, pkg.NewHTTPGetTar(
+	return t.newViaPerlModuleBuild("Module-Build", version, newTar(
-		nil, "https://cpan.metacpan.org/authors/id/L/LE/LEONT/"+
+		"https://cpan.metacpan.org/authors/id/L/LE/LEONT/"+
 			"Module-Build-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil), version
 }
@@ -145,11 +146,11 @@ func (t Toolchain) newPerlLocaleGettext() (pkg.Artifact, string) {
 		version  = "1.07"
 		checksum = "cFq4BKFD1MWSoa7lsrPjpdo9kzPqd0jlRcBFUyL1L1isw8m3D_Sge_ff0MAu_9J3"
 	)
-	return t.newViaPerlMakeMaker("Locale::gettext", version, pkg.NewHTTPGetTar(
+	return t.newViaPerlMakeMaker("Locale::gettext", version, newFromCPAN(
-		nil, "https://cpan.metacpan.org/authors/id/P/PV/PVANDRY/"+
+		"PVANDRY",
-			"Locale-gettext-"+version+".tar.gz",
+		"Locale-gettext",
-		mustDecode(checksum),
+		version,
-		pkg.TarGzip,
+		checksum,
 	), nil), version
 }
 func init() {
@@ -159,6 +160,8 @@ func init() {
 		Name:        "perl-Locale::gettext",
 		Description: "message handling functions",
 		Website:     "https://metacpan.org/release/Locale-gettext",
+
+		ID: 7523,
 	}
 }
 
@@ -167,11 +170,11 @@ func (t Toolchain) newPerlPodParser() (pkg.Artifact, string) {
 		version  = "1.67"
 		checksum = "RdURu9mOfExk_loCp6abxlcQV3FycSNbTqhRS9i6JUqnYfGGEgercK30g0gjYyqe"
 	)
-	return t.newViaPerlMakeMaker("Pod::Parser", version, pkg.NewHTTPGetTar(
+	return t.newViaPerlMakeMaker("Pod::Parser", version, newFromCPAN(
-		nil, "https://cpan.metacpan.org/authors/id/M/MA/MAREKR/"+
+		"MAREKR",
-			"Pod-Parser-"+version+".tar.gz",
+		"Pod-Parser",
-		mustDecode(checksum),
+		version,
-		pkg.TarGzip,
+		checksum,
 	), nil), version
 }
 func init() {
@@ -181,6 +184,8 @@ func init() {
 		Name:        "perl-Pod::Parser",
 		Description: "base class for creating POD filters and translators",
 		Website:     "https://metacpan.org/release/Pod-Parser",
+
+		ID: 3244,
 	}
 }
 
@@ -189,11 +194,11 @@ func (t Toolchain) newPerlSGMLS() (pkg.Artifact, string) {
 		version  = "1.1"
 		checksum = "aZijn4MUqD-wfyZgdcCruCwl4SgDdu25cNmJ4_UvdAk9a7uz4gzMQdoeB6DQ6QOy"
 	)
-	return t.newViaPerlMakeMaker("SGMLS", version, pkg.NewHTTPGetTar(
+	return t.newViaPerlMakeMaker("SGMLS", version, newFromCPAN(
-		nil, "https://cpan.metacpan.org/authors/id/R/RA/RAAB/"+
+		"RAAB",
-			"SGMLSpm-"+version+".tar.gz",
+		"SGMLSpm",
-		mustDecode(checksum),
+		version,
-		pkg.TarGzip,
+		checksum,
 	), nil), version
 }
 func init() {
@@ -203,6 +208,22 @@ func init() {
 		Name:        "perl-SGMLS",
 		Description: "class for postprocessing the output from the sgmls and nsgmls parsers",
 		Website:     "https://metacpan.org/release/RAAB/SGMLSpm-1.1",
+
+		ID: 389576,
+
+		latest: func(v *Versions) string {
+			for _, s := range v.Stable {
+				_, m, ok := strings.Cut(s, ".")
+				if !ok {
+					continue
+				}
+				if len(m) > 1 && m[0] == '0' {
+					continue
+				}
+				return s
+			}
+			return v.Latest
+		},
 	}
 }
 
@@ -211,11 +232,11 @@ func (t Toolchain) newPerlTermReadKey() (pkg.Artifact, string) {
 		version  = "2.38"
 		checksum = "qerL8Xo7kD0f42PZoiEbmE8Roc_S9pOa27LXelY4DN_0UNy_u5wLrGHI8utNlaiI"
 	)
-	return t.newViaPerlMakeMaker("Term::ReadKey", version, pkg.NewHTTPGetTar(
+	return t.newViaPerlMakeMaker("Term::ReadKey", version, newFromCPAN(
-		nil, "https://cpan.metacpan.org/authors/id/J/JS/JSTOWE/"+
+		"JSTOWE",
-			"TermReadKey-"+version+".tar.gz",
+		"TermReadKey",
-		mustDecode(checksum),
+		version,
-		pkg.TarGzip,
+		checksum,
 	), nil), version
 }
 func init() {
@@ -225,6 +246,8 @@ func init() {
 		Name:        "perl-Term::ReadKey",
 		Description: "a perl module for simple terminal control",
 		Website:     "https://metacpan.org/release/TermReadKey",
+
+		ID: 3372,
 	}
 }
 
@@ -233,11 +256,11 @@ func (t Toolchain) newPerlTextCharWidth() (pkg.Artifact, string) {
 		version  = "0.04"
 		checksum = "G2p5RHU4_HiZ23ZusBA_enTlVMxz0J4esUx4CGcOPhY6xYTbp-aXWRN6lYZpzBw2"
 	)
-	return t.newViaPerlMakeMaker("Text::CharWidth", version, pkg.NewHTTPGetTar(
+	return t.newViaPerlMakeMaker("Text::CharWidth", version, newFromCPAN(
-		nil, "https://cpan.metacpan.org/authors/id/K/KU/KUBOTA/"+
+		"KUBOTA",
-			"Text-CharWidth-"+version+".tar.gz",
+		"Text-CharWidth",
-		mustDecode(checksum),
+		version,
-		pkg.TarGzip,
+		checksum,
 	), nil), version
 }
 func init() {
@@ -247,6 +270,8 @@ func init() {
 		Name:        "perl-Text::CharWidth",
 		Description: "get number of occupied columns of a string on terminal",
 		Website:     "https://metacpan.org/release/Text-CharWidth",
+
+		ID: 14380,
 	}
 }
 
@@ -255,11 +280,11 @@ func (t Toolchain) newPerlTextWrapI18N() (pkg.Artifact, string) {
 		version  = "0.06"
 		checksum = "Vmo89qLgxUqyQ6QmWJVqu60aQAUjrNKRjFQSXGnvClxofzRjiCa6idzPgJ4VkixM"
 	)
-	return t.newViaPerlMakeMaker("Text::WrapI18N", version, pkg.NewHTTPGetTar(
+	return t.newViaPerlMakeMaker("Text::WrapI18N", version, newFromCPAN(
-		nil, "https://cpan.metacpan.org/authors/id/K/KU/KUBOTA/"+
+		"KUBOTA",
-			"Text-WrapI18N-"+version+".tar.gz",
+		"Text-WrapI18N",
-		mustDecode(checksum),
+		version,
-		pkg.TarGzip,
+		checksum,
 	), nil,
 		PerlTextCharWidth,
 	), version
@@ -275,6 +300,8 @@ func init() {
 		Dependencies: P{
 			PerlTextCharWidth,
 		},
+
+		ID: 14385,
 	}
 }
 
@@ -283,11 +310,11 @@ func (t Toolchain) newPerlMIMECharset() (pkg.Artifact, string) {
 		version  = "1.013.1"
 		checksum = "Ou_ukcrOa1cgtE3mptinb-os3bdL1SXzbRDFZQF3prrJj-drc3rp_huay7iDLJol"
 	)
-	return t.newViaPerlMakeMaker("MIME::Charset", version, pkg.NewHTTPGetTar(
+	return t.newViaPerlMakeMaker("MIME::Charset", version, newFromCPAN(
-		nil, "https://cpan.metacpan.org/authors/id/N/NE/NEZUMI/"+
+		"NEZUMI",
-			"MIME-Charset-"+version+".tar.gz",
+		"MIME-Charset",
-		mustDecode(checksum),
+		version,
-		pkg.TarGzip,
+		checksum,
 	), nil), version
 }
 func init() {
@@ -297,34 +324,38 @@ func init() {
 		Name:        "perl-MIME::Charset",
 		Description: "Charset Information for MIME",
 		Website:     "https://metacpan.org/release/MIME-Charset",
+
+		ID: 3070,
 	}
 }
 
-func (t Toolchain) newPerlUnicodeGCString() (pkg.Artifact, string) {
+func (t Toolchain) newPerlUnicodeLineBreak() (pkg.Artifact, string) {
 	const (
 		version  = "2019.001"
 		checksum = "ZHVkh7EDgAUHnTpvXsnPAuWpgNoBImtY_9_8TIbo2co_WgUwEb0MtXPhI8pAZ5OH"
 	)
-	return t.newViaPerlMakeMaker("Unicode::GCString", version, pkg.NewHTTPGetTar(
+	return t.newViaPerlMakeMaker("Unicode::LineBreak", version, newFromCPAN(
-		nil, "https://cpan.metacpan.org/authors/id/N/NE/NEZUMI/"+
+		"NEZUMI",
-			"Unicode-LineBreak-"+version+".tar.gz",
+		"Unicode-LineBreak",
-		mustDecode(checksum),
+		version,
-		pkg.TarGzip,
+		checksum,
 	), nil,
 		PerlMIMECharset,
 	), version
 }
 func init() {
-	artifactsM[PerlUnicodeGCString] = Metadata{
+	artifactsM[PerlUnicodeLineBreak] = Metadata{
-		f: Toolchain.newPerlUnicodeGCString,
+		f: Toolchain.newPerlUnicodeLineBreak,
 
-		Name:        "perl-Unicode::GCString",
+		Name:        "perl-Unicode::LineBreak",
 		Description: "String as Sequence of UAX #29 Grapheme Clusters",
 		Website:     "https://metacpan.org/release/Unicode-LineBreak",
 
 		Dependencies: P{
 			PerlMIMECharset,
 		},
+
+		ID: 6033,
 	}
 }
 
@@ -333,11 +364,11 @@ func (t Toolchain) newPerlYAMLTiny() (pkg.Artifact, string) {
 		version  = "1.76"
 		checksum = "V1MV4KPym1LxSw8CRXqPR3K-l1hGHbT5Ob4t-9xju6R9X_CWyw6hI8wsMaNdHdBY"
 	)
-	return t.newViaPerlMakeMaker("YAML::Tiny", version, pkg.NewHTTPGetTar(
+	return t.newViaPerlMakeMaker("YAML::Tiny", version, newFromCPAN(
-		nil, "https://cpan.metacpan.org/authors/id/E/ET/ETHER/"+
+		"ETHER",
-			"YAML-Tiny-"+version+".tar.gz",
+		"YAML-Tiny",
-		mustDecode(checksum),
+		version,
-		pkg.TarGzip,
+		checksum,
 	), nil), version
 }
 func init() {
@@ -347,5 +378,7 @@ func init() {
 		Name:        "perl-YAML::Tiny",
 		Description: "read/write YAML files with as little code as possible",
 		Website:     "https://metacpan.org/release/YAML-Tiny",
+
+		ID: 3549,
 	}
 }

internal/rosa/pkg-config.go

@@ -7,11 +7,11 @@ func (t Toolchain) newPkgConfig() (pkg.Artifact, string) {
 		version  = "0.29.2"
 		checksum = "6UsGqEMA8EER_5b9N0b32UCqiRy39B6_RnPfvuslWhtFV1qYD4DfS10crGZN_TP2"
 	)
-	return t.NewPackage("pkg-config", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("pkg-config", version, newFromGitLab(
-		nil, "https://gitlab.freedesktop.org/pkg-config/pkg-config/-/archive"+
+		"gitlab.freedesktop.org",
-			"/pkg-config-"+version+"/pkg-config-pkg-config-"+version+".tar.bz2",
+		"pkg-config/pkg-config",
-		mustDecode(checksum),
+		"pkg-config-"+version,
-		pkg.TarBzip2,
+		checksum,
 	), nil, &MakeHelper{
 		Generate: "./autogen.sh --no-configure",
 		Configure: []KV{

internal/rosa/procps.go

@@ -7,11 +7,11 @@ func (t Toolchain) newProcps() (pkg.Artifact, string) {
 		version  = "4.0.6"
 		checksum = "pl_fZLvDlv6iZTkm8l_tHFpzTDVFGCiSJEs3eu0zAX6u36AV36P_En8K7JPScRWM"
 	)
-	return t.NewPackage("procps", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("procps", version, newFromGitLab(
-		nil, "https://gitlab.com/procps-ng/procps/-/archive/"+
+		"gitlab.com",
-			"v"+version+"/procps-v"+version+".tar.bz2",
+		"procps-ng/procps",
-		mustDecode(checksum),
+		"v"+version,
-		pkg.TarBzip2,
+		checksum,
 	), nil, &MakeHelper{
 		Generate: "./autogen.sh",
 		Configure: []KV{

internal/rosa/python.go

@@ -1,6 +1,7 @@
 package rosa
 
 import (
+	"path"
 	"slices"
 	"strings"
 
@@ -12,10 +13,10 @@ func (t Toolchain) newPython() (pkg.Artifact, string) {
 		version  = "3.14.4"
 		checksum = "X0VRAAGOlCVldh4J9tRAE-YrJtDvqfQTJaqxKPXNX6YTPlwpR9GwA5WRIZDO-63s"
 	)
-	return t.NewPackage("python", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("python", version, newTar(
-		nil, "https://www.python.org/ftp/python/"+version+
+		"https://www.python.org/ftp/python/"+version+
 			"/Python-"+version+".tgz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		// test_synopsis_sourceless assumes this is writable and checks __pycache__
@@ -80,26 +81,42 @@ func init() {
 	}
 }
 
-// newViaPip is a helper for installing python dependencies via pip.
+// newViaPip installs a pip wheel from a url.
-func newViaPip(
+func (t Toolchain) newViaPip(
-	name, description, version, interpreter, abi, platform, checksum, prefix string,
+	name, version, url, checksum string,
 	extra ...PArtifact,
-) Metadata {
+) pkg.Artifact {
-	wname := name + "-" + version + "-" + interpreter + "-" + abi + "-" + platform + ".whl"
+	return t.New(name+"-"+version, 0, t.AppendPresets(nil,
-	return Metadata{
+		slices.Concat(P{Python}, extra)...,
-		f: func(t Toolchain) (pkg.Artifact, string) {
+	), nil, nil, `
-			return t.New(name+"-"+version, 0, t.AppendPresets(nil,
-				slices.Concat(P{Python}, extra)...,
-			), nil, nil, `
 pip3 install \
 	--no-index \
 	--prefix=/system \
 	--root=/work \
-	/usr/src/`+wname+`
+	'/usr/src/`+path.Base(url)+`'
-`, pkg.Path(AbsUsrSrc.Append(wname), false, pkg.NewHTTPGet(
+`, pkg.Path(AbsUsrSrc.Append(path.Base(url)), false, pkg.NewHTTPGet(
-				nil, prefix+wname,
+		nil, url,
-				mustDecode(checksum),
+		mustDecode(checksum),
-			))), version
+	)))
+}
+
+// newPypi creates [Metadata] for a [pypi] package.
+//
+// [pypi]: https://pypi.org/
+func newPypi(
+	name string, id int,
+	description, version, interpreter, abi, platform, checksum string,
+	extra ...PArtifact,
+) Metadata {
+	return Metadata{
+		f: func(t Toolchain) (pkg.Artifact, string) {
+			return t.newViaPip(name, version, "https://files.pythonhosted.org/"+path.Join(
+				"packages",
+				interpreter,
+				string(name[0]),
+				name,
+				name+"-"+version+"-"+interpreter+"-"+abi+"-"+platform+".whl",
+			), checksum, extra...), version
 		},
 
 		Name:        "python-" + name,
@@ -107,6 +124,8 @@ pip3 install \
 		Website:     "https://pypi.org/project/" + name + "/",
 
 		Dependencies: slices.Concat(P{Python}, extra),
+
+		ID: id,
 	}
 }
 
@@ -123,11 +142,9 @@ pip3 install \
 	--prefix=/system \
 	--root=/work \
 	/usr/src/setuptools
-`, pkg.Path(AbsUsrSrc.Append("setuptools"), true, pkg.NewHTTPGetTar(
+`, pkg.Path(AbsUsrSrc.Append("setuptools"), true, newFromGitHub(
-		nil, "https://github.com/pypa/setuptools/archive/refs/tags/"+
+		"pypa/setuptools",
-			"v"+version+".tar.gz",
+		"v"+version, checksum,
-		mustDecode(checksum),
-		pkg.TarGzip,
 	))), version
 }
 func init() {
@@ -147,52 +164,71 @@ func init() {
 }
 
 func init() {
-	artifactsM[PythonPygments] = newViaPip(
+	artifactsM[PythonPygments] = newPypi(
-		"pygments",
+		"pygments", 3986,
 		" a syntax highlighting package written in Python",
-		"2.19.2", "py3", "none", "any",
+		"2.20.0", "py3", "none", "any",
-		"ak_lwTalmSr7W4Mjy2XBZPG9I6a0gwSy2pS87N8x4QEuZYif0ie9z0OcfRfi9msd",
+		"qlyqX2YSXcV0Z8XgGaPttc_gkq-xsu_nYs6NFOcYnk-CX7qmcj45gG-h6DpwPIcO",
-		"https://files.pythonhosted.org/packages/"+
-			"c7/21/705964c7812476f378728bdf590ca4b771ec72385c533964653c68e86bdc/",
 	)
 
-	artifactsM[PythonPluggy] = newViaPip(
+	artifactsM[PythonPluggy] = newPypi(
-		"pluggy",
+		"pluggy", 7500,
 		"the core framework used by the pytest, tox, and devpi projects",
 		"1.6.0", "py3", "none", "any",
 		"2HWYBaEwM66-y1hSUcWI1MyE7dVVuNNRW24XD6iJBey4YaUdAK8WeXdtFMQGC-4J",
-		"https://files.pythonhosted.org/packages/"+
-			"54/20/4d324d65cc6d9205fabedc306948156824eb9f0ee1633355a8f7ec5c66bf/",
 	)
 
-	artifactsM[PythonPackaging] = newViaPip(
+	artifactsM[PythonPackaging] = newPypi(
-		"packaging",
+		"packaging", 60461,
 		"reusable core utilities for various Python Packaging interoperability specifications",
-		"26.0", "py3", "none", "any",
+		"26.1", "py3", "none", "any",
-		"iVVXcqdwHDskPKoCFUlh2x8J0Gyq-bhO4ns9DvUJ7oJjeOegRYtSIvLV33Bki-pP",
+		"6WZjBJeRb0eZZavxM8cLPcgD-ch-1FblsHoCFKC_9VUC5XAmd397LwliVhsnQcSN",
-		"https://files.pythonhosted.org/packages/"+
-			"b7/b9/c538f279a4e237a006a2c98387d081e9eb060d203d8ed34467cc0f0b9b53/",
 	)
 
-	artifactsM[PythonIniConfig] = newViaPip(
+	artifactsM[PythonIniConfig] = newPypi(
-		"iniconfig",
+		"iniconfig", 114778,
 		"a small and simple INI-file parser module",
 		"2.3.0", "py3", "none", "any",
 		"SDgs4S5bXi77aVOeKTPv2TUrS3M9rduiK4DpU0hCmDsSBWqnZcWInq9lsx6INxut",
-		"https://files.pythonhosted.org/packages/"+
-			"cb/b1/3846dd7f199d53cb17f49cba7e651e9ce294d8497c8c150530ed11865bb8/",
 	)
 
-	artifactsM[PythonPyTest] = newViaPip(
+	artifactsM[PythonPyTest] = newPypi(
-		"pytest",
+		"pytest", 3765,
 		"the pytest framework",
-		"9.0.2", "py3", "none", "any",
+		"9.0.3", "py3", "none", "any",
-		"IM2wDbLke1EtZhF92zvAjUl_Hms1uKDtM7U8Dt4acOaChMnDg1pW7ib8U0wYGDLH",
+		"57WLrIVOfyoRDjt5qD6LGOaDcDCtzQnKDSTUb7GzHyJDtry_nGHHs4-0tW0tiIJr",
-		"https://files.pythonhosted.org/packages/"+
-			"3b/ab/b3226f0bd7cdcf710fbede2b3548584366da3b19b5021e74f5bde2a8fa3f/",
 		PythonIniConfig,
 		PythonPackaging,
 		PythonPluggy,
 		PythonPygments,
 	)
+
+	artifactsM[PythonMarkupSafe] = newPypi(
+		"markupsafe", 3918,
+		"implements a text object that escapes characters so it is safe to use in HTML and XML",
+		"3.0.3", "cp314", "cp314", "musllinux_1_2_"+linuxArch(),
+		perArch[string]{
+			"amd64":   "E2mo9ig_FKgTpGon_8qqviSEULwhnmxTIqd9vfyNxNpK4yofVYM7eLW_VE-LKbtO",
+			"arm64":   "iG_hqsncOs8fA7bCaAg0x9XenXWlo9sqblyPcSG7yA9sfGLvM9KZznCpwWfOCwFC",
+			"riscv64": "7DI7U0M3jvr7U4uZml25GLw3m3EvMubCtNukZmss1gkVJ_DVkhV5DgX3Wt_sztbv",
+		}.unwrap(),
+	)
+
+	artifactsM[PythonMako] = newPypi(
+		"mako", 3915,
+		"a template library written in Python",
+		"1.3.11", "py3", "none", "any",
+		"WJ_hxYI-nNiuDiM6QhfAG84uO5U-M2aneB0JS9AQ2J2Oi6YXAbBxIdOeOEng6CoS",
+		PythonMarkupSafe,
+	)
+
+	artifactsM[PythonPyYAML] = newPypi(
+		"pyyaml", 4123,
+		"a YAML parser and emitter for Python",
+		"6.0.3", "cp314", "cp314", "musllinux_1_2_"+linuxArch(),
+		perArch[string]{
+			"amd64": "4_jhCFpUNtyrFp2HOMqUisR005u90MHId53eS7rkUbcGXkoaJ7JRsY21dREHEfGN",
+			"arm64": "sQ818ZYSmC7Vj9prIPx3sEYqSDhZlWvLbgHV9w4GjxsfQ63ZSzappctKM7Lb0Whw",
+		}.unwrap(),
+	)
 }

internal/rosa/qemu.go

@@ -7,9 +7,9 @@ func (t Toolchain) newQEMU() (pkg.Artifact, string) {
 		version  = "10.2.2"
 		checksum = "uNzRxlrVoLWe-EmZmBp75SezymgE512iE5XN90Bl7wi6CjE_oQGQB-9ocs7E16QG"
 	)
-	return t.NewPackage("qemu", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("qemu", version, newTar(
-		nil, "https://download.qemu.org/qemu-"+version+".tar.bz2",
+		"https://download.qemu.org/qemu-"+version+".tar.bz2",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarBzip2,
 	), &PackageAttr{
 		Patches: []KV{

internal/rosa/rdfind.go

@@ -7,9 +7,9 @@ func (t Toolchain) newRdfind() (pkg.Artifact, string) {
 		version  = "1.8.0"
 		checksum = "PoaeJ2WIG6yyfe5VAYZlOdAQiR3mb3WhAUMj2ziTCx_IIEal4640HMJUb4SzU9U3"
 	)
-	return t.NewPackage("rdfind", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("rdfind", version, newTar(
-		nil, "https://rdfind.pauldreik.se/rdfind-"+version+".tar.gz",
+		"https://rdfind.pauldreik.se/rdfind-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, &MakeHelper{
 		// test suite hard codes /bin/echo

internal/rosa/report_test.go

@@ -51,7 +51,8 @@ func TestReportSIGSEGV(t *testing.T) {
 			}
 		}()
 		defer r.HandleAccess(&err)()
-		r.ArtifactOf(unique.Make(pkg.ID{}))
+		for {
+			r.ArtifactOf(unique.Make(pkg.ID{}))
+		}
 	}
-
 }

internal/rosa/rosa.go

@@ -4,6 +4,7 @@ package rosa
 import (
 	"errors"
 	"log"
+	"path"
 	"runtime"
 	"slices"
 	"strconv"
@@ -69,6 +70,18 @@ func triplet() string {
 	return linuxArch() + "-rosa-linux-musl"
 }
 
+// perArch is a value that differs per architecture.
+type perArch[T any] map[string]T
+
+// unwrap returns the value for the current architecture.
+func (p perArch[T]) unwrap() T {
+	v, ok := p[runtime.GOARCH]
+	if !ok {
+		panic("unsupported target " + runtime.GOARCH)
+	}
+	return v
+}
+
 const (
 	// EnvTriplet holds the return value of triplet.
 	EnvTriplet = "ROSA_TRIPLE"
@@ -315,24 +328,23 @@ mkdir -vp /work/system/bin
 			name += "-std"
 		}
 
-		boot := t - 1
-		musl, compilerRT, runtimes, clang := boot.NewLLVM()
 		toybox := Toybox
 		if flag&TEarly != 0 {
 			toybox = toyboxEarly
 		}
-		std := []pkg.Artifact{cureEtc{newIANAEtc()}, musl}
-		toolchain := []pkg.Artifact{compilerRT, runtimes, clang}
-		utils := []pkg.Artifact{
-			boot.Load(Mksh),
-			boot.Load(toybox),
-		}
 
+		base := Clang
 		if flag&TNoToolchain != 0 {
-			toolchain = nil
+			base = Musl
 		}
 
-		support = slices.Concat(extra, std, toolchain, utils)
+		support = slices.Concat(extra, (t-1).AppendPresets([]pkg.Artifact{
+			cureEtc{newIANAEtc()},
+		},
+			base,
+			Mksh,
+			toybox,
+		))
 		env = fixupEnviron(env, []string{
 			EnvTriplet + "=" + triplet(),
 			lcMessages,
@@ -408,8 +420,6 @@ const helperInPlace = "\x00"
 
 // Helper is a build system helper for [Toolchain.NewPackage].
 type Helper interface {
-	// name returns the value passed to the name argument of [Toolchain.New].
-	name(name, version string) string
 	// extra returns helper-specific dependencies.
 	extra(flag int) P
 
@@ -431,11 +441,6 @@ type Helper interface {
 	script(name string) string
 }
 
-const (
-	// SourceKindTarXZ denotes a source tarball to be decompressed using [XZ].
-	SourceKindTarXZ = 1 + iota
-)
-
 // PackageAttr holds build-system-agnostic attributes.
 type PackageAttr struct {
 	// Mount the source tree writable.
@@ -452,8 +457,6 @@ type PackageAttr struct {
 
 	// Passed to [Toolchain.NewPatchedSource].
 	Patches []KV
-	// Kind of source artifact.
-	SourceKind int
 
 	// Dependencies not provided by stage0.
 	NonStage0 []pkg.Artifact
@@ -525,11 +528,6 @@ func (t Toolchain) NewPackage(
 		panic("source must be non-nil")
 	}
 	wantsChmod, wantsWrite := helper.wantsChmod(), helper.wantsWrite()
-	if attr.SourceKind > 0 &&
-		(attr.Writable || attr.Chmod || wantsChmod || wantsWrite || len(attr.Patches) > 0) {
-		panic("source processing requested on a non-unpacked kind")
-	}
-
 	dc := len(attr.NonStage0)
 	if !t.isStage0() {
 		dc += 1<<3 + len(extra)
@@ -548,17 +546,23 @@ func (t Toolchain) NewPackage(
 		paPut(pv)
 	}
 
-	var scriptEarly string
+	var (
+		scriptEarly  string
+		sourceSuffix string
+	)
+
+	if _, ok := source.(pkg.FileArtifact); ok {
+		if attr.Writable || attr.Chmod ||
+			wantsChmod || wantsWrite ||
+			len(attr.Patches) > 0 {
+			panic("source processing requested on a xz-compressed tarball")
+		}
 
-	var sourceSuffix string
-	switch attr.SourceKind {
-	case SourceKindTarXZ:
 		sourceSuffix = ".tar.xz"
 		scriptEarly += `
 tar -C /usr/src/ -xf '/usr/src/` + name + `.tar.xz'
 mv '/usr/src/` + name + `-` + version + `' '/usr/src/` + name + `'
 `
-		break
 	}
 
 	dir := helper.wantsDir()
@@ -582,7 +586,7 @@ cd '/usr/src/` + name + `/'
 	}
 
 	return t.New(
-		helper.name(name, version),
+		name+"-"+version,
 		attr.Flag,
 		extraRes,
 		nil,
@@ -597,3 +601,65 @@ cd '/usr/src/` + name + `/'
 		})...,
 	)
 }
+
+const (
+	// jobsE is expression for preferred job count set by [pkg].
+	jobsE = `"$` + pkg.EnvJobs + `"`
+	// jobsE is expression for flag with preferred job count.
+	jobsFlagE = `"-j$` + pkg.EnvJobs + `"`
+	// jobsLE is expression for twice of preferred job count set by [pkg].
+	jobsLE = `"$(expr ` + jobsE + ` '*' 2)"`
+	// jobsE is expression for flag with double of preferred job count.
+	jobsLFlagE = `"-j$(expr ` + jobsE + ` '*' 2)"`
+)
+
+// newTar wraps [pkg.NewHTTPGetTar] with a simpler function signature.
+func newTar(url, checksum string, compression uint32) pkg.Artifact {
+	return pkg.NewHTTPGetTar(nil, url, mustDecode(checksum), compression)
+}
+
+// newFromCPAN is a helper for downloading release from CPAN.
+func newFromCPAN(author, name, version, checksum string) pkg.Artifact {
+	return newTar(
+		"https://cpan.metacpan.org/authors/id/"+
+			author[:1]+"/"+author[:2]+"/"+author+"/"+
+			name+"-"+version+".tar.gz",
+		checksum,
+		pkg.TarGzip,
+	)
+}
+
+// newFromGitLab is a helper for downloading source from GitLab.
+func newFromGitLab(domain, suffix, ref, checksum string) pkg.Artifact {
+	return newTar(
+		"https://"+domain+"/"+suffix+"/-/archive/"+
+			ref+"/"+path.Base(suffix)+"-"+
+			strings.ReplaceAll(ref, "/", "-")+".tar.bz2",
+		checksum,
+		pkg.TarBzip2,
+	)
+}
+
+// newFromGitHub is a helper for downloading source from Microsoft Github.
+func newFromGitHub(suffix, tag, checksum string) pkg.Artifact {
+	return newTar(
+		"https://github.com/"+suffix+
+			"/archive/refs/tags/"+tag+".tar.gz",
+		checksum,
+		pkg.TarGzip,
+	)
+}
+
+// newFromGitHubRelease is a helper for downloading release tarball from
+// Microsoft Github.
+func newFromGitHubRelease(
+	suffix, tag, name, checksum string,
+	compression uint32,
+) pkg.Artifact {
+	return newTar(
+		"https://github.com/"+suffix+
+			"/releases/download/"+tag+"/"+name,
+		checksum,
+		compression,
+	)
+}

internal/rosa/rosa_test.go

@@ -60,7 +60,7 @@ func getCache(t *testing.T) *pkg.Cache {
 			msg := message.New(log.New(os.Stderr, "rosa: ", 0))
 			msg.SwapVerbose(true)
 
-			if buildTestCache, err = pkg.Open(ctx, msg, 0, 0, a); err != nil {
+			if buildTestCache, err = pkg.Open(ctx, msg, 0, 0, 0, a); err != nil {
 				t.Fatal(err)
 			}
 		}
@@ -94,7 +94,7 @@ func TestCureAll(t *testing.T) {
 
 func BenchmarkStage3(b *testing.B) {
 	for b.Loop() {
-		rosa.Std.Load(rosa.LLVMClang)
+		rosa.Std.Load(rosa.Clang)
 
 		b.StopTimer()
 		rosa.DropCaches()

internal/rosa/rsync.go

@@ -7,10 +7,10 @@ func (t Toolchain) newRsync() (pkg.Artifact, string) {
 		version  = "3.4.1"
 		checksum = "VBlTsBWd9z3r2-ex7GkWeWxkUc5OrlgDzikAC0pK7ufTjAJ0MbmC_N04oSVTGPiv"
 	)
-	return t.NewPackage("rsync", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("rsync", version, newTar(
-		nil, "https://download.samba.org/pub/rsync/src/"+
+		"https://download.samba.org/pub/rsync/src/"+
 			"rsync-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		Flag: TEarly,

internal/rosa/squashfs.go

@@ -7,10 +7,11 @@ func (t Toolchain) newSquashfsTools() (pkg.Artifact, string) {
 		version  = "4.7.5"
 		checksum = "rF52wLQP-jeAmcD-48wqJcck8ZWRFwkax3T-7snaRf5EBnCQQh0YypMY9lwcivLz"
 	)
-	return t.NewPackage("squashfs-tools", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("squashfs-tools", version, newFromGitHubRelease(
-		nil, "https://github.com/plougher/squashfs-tools/releases/"+
+		"plougher/squashfs-tools",
-			"download/"+version+"/squashfs-tools-"+version+".tar.gz",
+		version,
-		mustDecode(checksum),
+		"squashfs-tools-"+version+".tar.gz",
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		// uses source tree as scratch space

internal/rosa/stage0.go

@@ -1,19 +1,17 @@
 package rosa
 
 import (
-	"runtime"
 	"sync"
 
 	"hakurei.app/internal/pkg"
 )
 
 func (t Toolchain) newStage0() (pkg.Artifact, string) {
-	musl, compilerRT, runtimes, clang := t.NewLLVM()
 	return t.New("rosa-stage0", 0, []pkg.Artifact{
-		musl,
+		t.Load(Musl),
-		compilerRT,
+		t.Load(CompilerRT),
-		runtimes,
+		t.Load(LLVMRuntimes),
-		clang,
+		t.Load(Clang),
 
 		t.Load(Zlib),
 		t.Load(Bzip2),
@@ -61,23 +59,14 @@ var (
 // NewStage0 returns a stage0 distribution created from curing [Stage0].
 func NewStage0() pkg.Artifact {
 	stage0Once.Do(func() {
-		var seed string
+		stage0 = newTar(
-		switch runtime.GOARCH {
+			"https://hakurei.app/seed/20260210/"+
-		case "amd64":
-			seed = "tqM1Li15BJ-uFG8zU-XjgFxoN_kuzh1VxrSDVUVa0vGmo-NeWapSftH739sY8EAg"
-		case "arm64":
-			seed = "CJj3ZSnRyLmFHlWIQtTPQD9oikOZY4cD_mI3v_-LIYc2hhg-cq_CZFBLzQBAkFIn"
-		case "riscv64":
-			seed = "FcszJjcVWdKAnn-bt8qmUn5GUUTjv_xQjXOWkUpOplRkG3Ckob3StUoAi5KQ5-QF"
-
-		default:
-			panic("unsupported target " + runtime.GOARCH)
-		}
-
-		stage0 = pkg.NewHTTPGetTar(
-			nil, "https://hakurei.app/seed/20260210/"+
 				"stage0-"+triplet()+".tar.bz2",
-			mustDecode(seed),
+			perArch[string]{
+				"amd64":   "tqM1Li15BJ-uFG8zU-XjgFxoN_kuzh1VxrSDVUVa0vGmo-NeWapSftH739sY8EAg",
+				"arm64":   "CJj3ZSnRyLmFHlWIQtTPQD9oikOZY4cD_mI3v_-LIYc2hhg-cq_CZFBLzQBAkFIn",
+				"riscv64": "FcszJjcVWdKAnn-bt8qmUn5GUUTjv_xQjXOWkUpOplRkG3Ckob3StUoAi5KQ5-QF",
+			}.unwrap(),
 			pkg.TarBzip2,
 		)
 	})

internal/rosa/strace.go

@@ -11,8 +11,6 @@ func (t Toolchain) newStrace() (pkg.Artifact, string) {
 		nil, "https://strace.io/files/"+version+"/strace-"+version+".tar.xz",
 		mustDecode(checksum),
 	), &PackageAttr{
-		SourceKind: SourceKindTarXZ,
-
 		// patch not possible with nonzero SourceKind
 		ScriptEarly: `
 sed -i 's/off64_t/off_t/g' \

internal/rosa/tamago.go

@@ -31,11 +31,10 @@ rm \
 	os/root_unix_test.go
 
 ./all.bash
-`, pkg.Path(AbsUsrSrc.Append("tamago"), false, pkg.NewHTTPGetTar(
+`, pkg.Path(AbsUsrSrc.Append("tamago"), false, newFromGitHub(
-		nil, "https://github.com/usbarmory/tamago-go/archive/refs/tags/"+
+		"usbarmory/tamago-go",
-			"tamago-go"+version+".tar.gz",
+		"tamago-go"+version,
-		mustDecode(checksum),
+		checksum,
-		pkg.TarGzip,
 	))), version
 }
 func init() {

internal/rosa/toybox.go

@@ -7,9 +7,9 @@ func (t Toolchain) newToybox(suffix, script string) (pkg.Artifact, string) {
 		version  = "0.8.13"
 		checksum = "rZ1V1ATDte2WeQZanxLVoiRGdfPXhMlEo5-exX-e-ml8cGn9qOv0ABEUVZpX3wTI"
 	)
-	return t.NewPackage("toybox"+suffix, version, pkg.NewHTTPGetTar(
+	return t.NewPackage("toybox"+suffix, version, newTar(
-		nil, "https://landley.net/toybox/downloads/toybox-"+version+".tar.gz",
+		"https://landley.net/toybox/downloads/toybox-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		// uses source tree as scratch space

internal/rosa/unzip.go

@@ -22,11 +22,11 @@ make -f unix/Makefile generic1
 mkdir -p /work/system/bin/
 mv unzip /work/system/bin/
 `, pkg.Path(AbsUsrSrc.Append("unzip"), true, t.NewPatchedSource(
-		"unzip", version, pkg.NewHTTPGetTar(
+		"unzip", version, newTar(
-			nil, "https://downloads.sourceforge.net/project/infozip/"+
+			"https://downloads.sourceforge.net/project/infozip/"+
 				"UnZip%206.x%20%28latest%29/UnZip%20"+version+"/"+
 				"unzip"+strings.ReplaceAll(version, ".", "")+".tar.gz",
-			mustDecode(checksum),
+			checksum,
 			pkg.TarGzip,
 		), false,
 	))), version

internal/rosa/util-linux.go

@@ -11,11 +11,11 @@ func (t Toolchain) newUtilLinux() (pkg.Artifact, string) {
 		version  = "2.42"
 		checksum = "Uy8Nxg9DsW5YwDoeaZeZTyQJ2YmnaaL_fSsQXsLUiFFUd7wnZeD_3SEaVO7ClJlk"
 	)
-	return t.NewPackage("util-linux", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("util-linux", version, newTar(
-		nil, "https://www.kernel.org/pub/linux/utils/util-linux/"+
+		"https://www.kernel.org/pub/linux/utils/util-linux/"+
 			"v"+strings.Join(strings.SplitN(version, ".", 3)[:2], ".")+
 			"/util-linux-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), &PackageAttr{
 		ScriptEarly: `

internal/rosa/wayland.go

@@ -7,11 +7,11 @@ func (t Toolchain) newWayland() (pkg.Artifact, string) {
 		version  = "1.25.0"
 		checksum = "q-4dYXme46JPgLGtXAxyZGTy7udll9RfT0VXtcW2YRR1WWViUhvdZXZneXzLqpCg"
 	)
-	return t.NewPackage("wayland", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("wayland", version, newFromGitLab(
-		nil, "https://gitlab.freedesktop.org/wayland/wayland/"+
+		"gitlab.freedesktop.org",
-			"-/archive/"+version+"/wayland-"+version+".tar.bz2",
+		"wayland/wayland",
-		mustDecode(checksum),
+		version,
-		pkg.TarBzip2,
+		checksum,
 	), &PackageAttr{
 		Writable: true,
 		ScriptEarly: `
@@ -57,11 +57,11 @@ func (t Toolchain) newWaylandProtocols() (pkg.Artifact, string) {
 		version  = "1.48"
 		checksum = "xvfHCBIzXGwOqOu9b8dfhGw_U29Pd-g4JBwpYIaxee8SwEbxi6NaVU-Y1Q7wY4jK"
 	)
-	return t.NewPackage("wayland-protocols", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("wayland-protocols", version, newFromGitLab(
-		nil, "https://gitlab.freedesktop.org/wayland/wayland-protocols/"+
+		"gitlab.freedesktop.org",
-			"-/archive/"+version+"/wayland-protocols-"+version+".tar.bz2",
+		"wayland/wayland-protocols",
-		mustDecode(checksum),
+		version,
-		pkg.TarBzip2,
+		checksum,
 	), &PackageAttr{
 		Patches: []KV{
 			{"build-only", `From 8b4c76275fa1b6e0a99a53494151d9a2c907144d Mon Sep 17 00:00:00 2001

internal/rosa/x.go

@@ -7,10 +7,10 @@ func (t Toolchain) newUtilMacros() (pkg.Artifact, string) {
 		version  = "1.20.2"
 		checksum = "Ze8QH3Z3emC0pWFP-0nUYeMy7aBW3L_dxBBmVgcumIHNzEKc1iGTR-yUFR3JcM1G"
 	)
-	return t.NewPackage("util-macros", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("util-macros", version, newTar(
-		nil, "https://www.x.org/releases/individual/util/"+
+		"https://www.x.org/releases/individual/util/"+
 			"util-macros-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, (*MakeHelper)(nil)), version
 }
@@ -31,10 +31,10 @@ func (t Toolchain) newXproto() (pkg.Artifact, string) {
 		version  = "7.0.31"
 		checksum = "Cm69urWY5RctKpR78eGzuwrjDEfXGkvHRdodj6sjypOGy5FF4-lmnUttVHYV1ydg"
 	)
-	return t.NewPackage("xproto", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("xproto", version, newTar(
-		nil, "https://www.x.org/releases/individual/proto/"+
+		"https://www.x.org/releases/individual/proto/"+
 			"xproto-"+version+".tar.bz2",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarBzip2,
 	), nil, &MakeHelper{
 		// ancient configure script
@@ -63,10 +63,10 @@ func (t Toolchain) newLibXau() (pkg.Artifact, string) {
 		version  = "1.0.12"
 		checksum = "G9AjnU_C160q814MCdjFOVt_mQz_pIt4wf4GNOQmGJS3UuuyMw53sfPvJ7WOqwXN"
 	)
-	return t.NewPackage("libXau", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("libXau", version, newTar(
-		nil, "https://www.x.org/releases/individual/lib/"+
+		"https://www.x.org/releases/individual/lib/"+
 			"libXau-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, &MakeHelper{
 		// ancient configure script
@@ -95,3 +95,35 @@ func init() {
 		ID: 1765,
 	}
 }
+
+func (t Toolchain) newLibpciaccess() (pkg.Artifact, string) {
+	const (
+		version  = "0.19"
+		checksum = "84H0c_U_7fMqo81bpuwyXGXtk4XvvFH_YK00UiOriv3YGsuAhmbo2IkFhmJnvu2x"
+	)
+	return t.NewPackage("libpciaccess", version, newFromGitLab(
+		"gitlab.freedesktop.org",
+		"xorg/lib/libpciaccess",
+		"libpciaccess-"+version,
+		checksum,
+	), nil, &MesonHelper{
+		Setup: []KV{
+			{"Dzlib", "enabled"},
+		},
+	}), version
+}
+func init() {
+	artifactsM[Libpciaccess] = Metadata{
+		f: Toolchain.newLibpciaccess,
+
+		Name:        "libpciaccess",
+		Description: "generic PCI access library",
+		Website:     "https://gitlab.freedesktop.org/xorg/lib/libpciaccess",
+
+		Dependencies: P{
+			Zlib,
+		},
+
+		ID: 1703,
+	}
+}

internal/rosa/xcb.go

@@ -7,9 +7,9 @@ func (t Toolchain) newXCBProto() (pkg.Artifact, string) {
 		version  = "1.17.0"
 		checksum = "_NtbKaJ_iyT7XiJz25mXQ7y-niTzE8sHPvLXZPcqtNoV_-vTzqkezJ8Hp2U1enCv"
 	)
-	return t.NewPackage("xcb-proto", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("xcb-proto", version, newTar(
-		nil, "https://xcb.freedesktop.org/dist/xcb-proto-"+version+".tar.gz",
+		"https://xcb.freedesktop.org/dist/xcb-proto-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, (*MakeHelper)(nil),
 		Python,
@@ -32,9 +32,9 @@ func (t Toolchain) newXCB() (pkg.Artifact, string) {
 		version  = "1.17.0"
 		checksum = "hjjsc79LpWM_hZjNWbDDS6qRQUXREjjekS6UbUsDq-RR1_AjgNDxhRvZf-1_kzDd"
 	)
-	return t.NewPackage("xcb", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("xcb", version, newTar(
-		nil, "https://xcb.freedesktop.org/dist/libxcb-"+version+".tar.gz",
+		"https://xcb.freedesktop.org/dist/libxcb-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, (*MakeHelper)(nil),
 		Python,

internal/rosa/xz.go

@@ -7,10 +7,11 @@ func (t Toolchain) newXZ() (pkg.Artifact, string) {
 		version  = "5.8.3"
 		checksum = "nCdayphPGdIdVoAZ2hR4vYlhDG9LeVKho_i7ealTud4Vxy5o5dWe0VwFlN7utuUL"
 	)
-	return t.NewPackage("xz", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("xz", version, newFromGitHubRelease(
-		nil, "https://github.com/tukaani-project/xz/releases/download/"+
+		"tukaani-project/xz",
-			"v"+version+"/xz-"+version+".tar.bz2",
+		"v"+version,
-		mustDecode(checksum),
+		"xz-"+version+".tar.bz2",
+		checksum,
 		pkg.TarBzip2,
 	), nil, (*MakeHelper)(nil),
 		Diffutils,

internal/rosa/zlib.go

@@ -7,9 +7,9 @@ func (t Toolchain) newZlib() (pkg.Artifact, string) {
 		version  = "1.3.2"
 		checksum = "KHZrePe42vL2XvOUE3KlJkp1UgWhWkl0jjT_BOvFhuM4GzieEH9S7CioepOFVGYB"
 	)
-	return t.NewPackage("zlib", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("zlib", version, newTar(
-		nil, "https://www.zlib.net/fossils/zlib-"+version+".tar.gz",
+		"https://www.zlib.net/fossils/zlib-"+version+".tar.gz",
-		mustDecode(checksum),
+		checksum,
 		pkg.TarGzip,
 	), nil, &CMakeHelper{
 		Cache: []KV{

internal/rosa/zstd.go

@@ -7,10 +7,11 @@ func (t Toolchain) newZstd() (pkg.Artifact, string) {
 		version  = "1.5.7"
 		checksum = "4XhfR7DwVkwo1R-TmYDAJOcx9YXv9WSFhcFUe3hWEAMmdMLPhFaznCqYIA19_xxV"
 	)
-	return t.NewPackage("zstd", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("zstd", version, newFromGitHubRelease(
-		nil, "https://github.com/facebook/zstd/releases/download/"+
+		"facebook/zstd",
-			"v"+version+"/zstd-"+version+".tar.gz",
+		"v"+version,
-		mustDecode(checksum),
+		"zstd-"+version+".tar.gz",
+		checksum,
 		pkg.TarGzip,
 	), nil, &CMakeHelper{
 		Append: []string{"build", "cmake"},

nixos.nix

@@ -136,11 +136,12 @@ in
 
                   conf = {
                     inherit id;
-                    inherit (app) identity groups enablements;
+                    inherit (app) identity enablements;
                     inherit (dbusConfig) session_bus system_bus;
                     direct_wayland = app.insecureWayland;
                     sched_policy = app.schedPolicy;
                     sched_priority = app.schedPriority;
+                    groups = app.groups ++ optional (cfg.sharefs.source != null) cfg.sharefs.group;
 
                     container = {
                       inherit (app)
@@ -357,29 +358,30 @@ in
         users = mkMerge (
           foldlAttrs
             (
-              acc: _: fid:
+              acc: username: fid:
               acc
-              ++ foldlAttrs (
+              ++
-                acc': _: app:
+                foldlAttrs
-                acc' ++ [ { ${getsubname fid app.identity} = getuser fid app.identity; } ]
+                  (
-              ) [ { ${getsubname fid 0} = getuser fid 0; } ] cfg.apps
+                    acc': _: app:
-            )
+                    acc' ++ [ { ${getsubname fid app.identity} = getuser fid app.identity; } ]
-            (
+                  )
-              if (cfg.sharefs.source != null) then
+                  [
-                [
+                    {
-                  {
+                      ${getsubname fid 0} = getuser fid 0;
-                    ${cfg.sharefs.user} = {
+                      ${username}.extraGroups = [ cfg.sharefs.group ];
-                      uid = lib.mkDefault 1023;
+                    }
-                      inherit (cfg.sharefs) group;
+                  ]
-                      isSystemUser = true;
+                  cfg.apps
-                      home = cfg.sharefs.source;
-                    };
-
-                  }
-                ]
-              else
-                [ ]
             )
+            (optional (cfg.sharefs.source != null) {
+              ${cfg.sharefs.user} = {
+                uid = lib.mkDefault 1023;
+                inherit (cfg.sharefs) group;
+                isSystemUser = true;
+                home = cfg.sharefs.source;
+              };
+            })
             cfg.users
         );
 
@@ -393,18 +395,11 @@ in
                 acc' ++ [ { ${getsubname fid app.identity} = getgroup fid app.identity; } ]
               ) [ { ${getsubname fid 0} = getgroup fid 0; } ] cfg.apps
             )
-            (
+            (optional (cfg.sharefs.source != null) {
-              if (cfg.sharefs.source != null) then
+              ${cfg.sharefs.group} = {
-                [
+                gid = lib.mkDefault 1023;
-                  {
+              };
-                    ${cfg.sharefs.group} = {
+            })
-                      gid = lib.mkDefault 1023;
-                    };
-                  }
-                ]
-              else
-                [ ]
-            )
             cfg.users
         );
       };

test/interactive/configuration.nix

@@ -8,10 +8,7 @@
       description = "Alice Foobar";
       password = "foobar";
       uid = 1000;
-      extraGroups = [
+      extraGroups = [ "wheel" ];
-        "wheel"
-        "sharefs"
-      ];
     };
     untrusted = {
       isNormalUser = true;