cmd/dist: replace dist/release.sh

This is much more robust than a shell script.

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

.gitignore

@@ -1,27 +1,7 @@
-# Binaries for programs and plugins
-*.exe
-*.exe~
-*.dll
-*.so
-*.dylib
-*.pkg
-/hakurei
-
-# Test binary, built with `go test -c`
+# produced by tools and text editors
+*.qcow2
 *.test
-
-# Output of the go coverage tool, specifically when used with LiteIDE
 *.out
-
-# Dependency directories (remove the comment below to include it)
-# vendor/
-
-# Go workspace file
-go.work
-go.work.sum
-
-# env file
-.env
 .idea
 .vscode
 
@@ -30,8 +10,5 @@ go.work.sum
 /internal/pkg/testdata/testtool
 /internal/rosa/hakurei_current.tar.gz
 
-# release
-/dist/hakurei-*
-
-# interactive nixos vm
-nixos.qcow2
+# cmd/dist default destination
+/dist

all.sh

@@ -0,0 +1,6 @@
+#!/bin/sh -e
+
+TOOLCHAIN_VERSION="$(go version)"
+cd "$(dirname -- "$0")/"
+echo "# Building cmd/dist using ${TOOLCHAIN_VERSION}."
+go run -v --tags=dist ./cmd/dist

cmd/dist/main.go

@@ -0,0 +1,228 @@
+//go:build dist
+
+package main
+
+import (
+	"archive/tar"
+	"compress/gzip"
+	"context"
+	"crypto/sha512"
+	_ "embed"
+	"encoding/hex"
+	"fmt"
+	"io"
+	"io/fs"
+	"log"
+	"os"
+	"os/exec"
+	"os/signal"
+	"path/filepath"
+	"runtime"
+)
+
+// getenv looks up an environment variable, and returns fallback if it is unset.
+func getenv(key, fallback string) string {
+	if v, ok := os.LookupEnv(key); ok {
+		return v
+	}
+	return fallback
+}
+
+// mustRun runs a command with the current process's environment and panics
+// on error or non-zero exit code.
+func mustRun(ctx context.Context, name string, arg ...string) {
+	cmd := exec.CommandContext(ctx, name, arg...)
+	cmd.Stdin, cmd.Stdout, cmd.Stderr = os.Stdin, os.Stdout, os.Stderr
+	if err := cmd.Run(); err != nil {
+		panic(err)
+	}
+}
+
+//go:embed comp/_hakurei
+var comp []byte
+
+func main() {
+	fmt.Println()
+	log.SetFlags(0)
+	log.SetPrefix("# ")
+
+	version := getenv("HAKUREI_VERSION", "untagged")
+	prefix := getenv("PREFIX", "/usr")
+	destdir := getenv("DESTDIR", "dist")
+
+	if err := os.MkdirAll(destdir, 0755); err != nil {
+		log.Fatal(err)
+	}
+	s, err := os.MkdirTemp(destdir, ".dist.*")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer func() {
+		var code int
+
+		if err = os.RemoveAll(s); err != nil {
+			code = 1
+			log.Println(err)
+		}
+
+		if r := recover(); r != nil {
+			code = 1
+			log.Println(r)
+		}
+
+		os.Exit(code)
+	}()
+
+	ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt)
+	defer cancel()
+
+	log.Println("Building hakurei.")
+	mustRun(ctx, "go", "generate", "./...")
+	mustRun(
+		ctx, "go", "build",
+		"-trimpath",
+		"-v", "-o", s,
+		"-ldflags=-s -w "+
+			"-buildid= -linkmode external -extldflags=-static "+
+			"-X hakurei.app/internal/info.buildVersion="+version+" "+
+			"-X hakurei.app/internal/info.hakureiPath="+prefix+"/bin/hakurei "+
+			"-X hakurei.app/internal/info.hsuPath="+prefix+"/bin/hsu "+
+			"-X main.hakureiPath="+prefix+"/bin/hakurei",
+		"./...",
+	)
+	fmt.Println()
+
+	log.Println("Testing Hakurei.")
+	mustRun(
+		ctx, "go", "test",
+		"-ldflags=-buildid= -linkmode external -extldflags=-static",
+		"./...",
+	)
+	fmt.Println()
+
+	log.Println("Creating distribution.")
+	const suffix = ".tar.gz"
+	distName := "hakurei-" + version + "-" + runtime.GOARCH
+	var f *os.File
+	if f, err = os.OpenFile(
+		filepath.Join(s, distName+suffix),
+		os.O_CREATE|os.O_EXCL|os.O_WRONLY,
+		0644,
+	); err != nil {
+		panic(err)
+	}
+	defer func() {
+		if f == nil {
+			return
+		}
+		if err = f.Close(); err != nil {
+			log.Println(err)
+		}
+	}()
+
+	h := sha512.New()
+	gw := gzip.NewWriter(io.MultiWriter(f, h))
+	tw := tar.NewWriter(gw)
+
+	mustWriteHeader := func(name string, size int64, mode os.FileMode) {
+		if err = tw.WriteHeader(&tar.Header{
+			Name:  filepath.Join(distName, name),
+			Size:  size,
+			Mode:  int64(mode),
+			Uname: "root",
+			Gname: "root",
+		}); err != nil {
+			panic(err)
+		}
+
+		if mode&os.ModeDir != 0 {
+			fmt.Printf("%s %s\n", mode, name)
+		} else {
+			fmt.Printf("%s %s (%d bytes)\n", mode, name, size)
+		}
+	}
+
+	mustWriteFile := func(name string, data []byte, mode os.FileMode) {
+		mustWriteHeader(name, int64(len(data)), mode)
+		if mode&os.ModeDir != 0 {
+			return
+		}
+		if _, err = tw.Write(data); err != nil {
+			panic(err)
+		}
+	}
+
+	mustWriteFromPath := func(dst, src string) {
+		var r *os.File
+		if r, err = os.Open(src); err != nil {
+			panic(err)
+		}
+
+		var fi os.FileInfo
+		if fi, err = r.Stat(); err != nil {
+			_ = r.Close()
+			panic(err)
+		}
+
+		mustWriteHeader(dst, fi.Size(), fi.Mode())
+		if _, err = io.Copy(tw, r); err != nil {
+			_ = r.Close()
+			panic(err)
+		} else if err = r.Close(); err != nil {
+			panic(err)
+		}
+	}
+
+	mustWriteFile(".", nil, fs.ModeDir|0755)
+	mustWriteFile("comp/", nil, os.ModeDir|0755)
+	mustWriteFile("comp/_hakurei", comp, 0644)
+	mustWriteFile("install.sh", []byte(`#!/bin/sh -e
+cd "$(dirname -- "$0")" || exit 1
+
+install -vDm0755 "bin/hakurei" "${DESTDIR}`+prefix+`/bin/hakurei"
+install -vDm0755 "bin/sharefs" "${DESTDIR}`+prefix+`/bin/sharefs"
+
+install -vDm4511 "bin/hsu" "${DESTDIR}`+prefix+`/bin/hsu"
+if [ ! -f "${DESTDIR}/etc/hsurc" ]; then
+    install -vDm0400 "hsurc.default" "${DESTDIR}/etc/hsurc"
+fi
+
+install -vDm0644 "comp/_hakurei" "${DESTDIR}`+prefix+`/share/zsh/site-functions/_hakurei"
+`), 0755)
+
+	mustWriteFromPath("README.md", "README.md")
+	mustWriteFile("hsurc.default", []byte("1000 0"), 0400)
+	for _, name := range []string{
+		"hsu",
+		"hakurei",
+		"sharefs",
+	} {
+		mustWriteFromPath(
+			filepath.Join("bin", name),
+			filepath.Join(s, name),
+		)
+	}
+
+	if err = tw.Close(); err != nil {
+		panic(err)
+	} else if err = gw.Close(); err != nil {
+		panic(err)
+	} else if err = f.Close(); err != nil {
+		panic(err)
+	}
+	f = nil
+
+	if err = os.WriteFile(
+		filepath.Join(destdir, distName+suffix+".sha512"),
+		append(hex.AppendEncode(nil, h.Sum(nil)), "  "+distName+suffix+"\n"...),
+		0644,
+	); err != nil {
+		panic(err)
+	}
+	if err = os.Rename(
+		filepath.Join(s, distName+suffix),
+		filepath.Join(destdir, distName+suffix),
+	); err != nil {
+		panic(err)
+	}
+}

dist/hsurc.default

@@ -1 +0,0 @@
-1000 0

dist/install.sh

@@ -1,12 +0,0 @@
-#!/bin/sh
-cd "$(dirname -- "$0")" || exit 1
-
-install -vDm0755 "bin/hakurei" "${DESTDIR}/usr/bin/hakurei"
-install -vDm0755 "bin/sharefs" "${DESTDIR}/usr/bin/sharefs"
-
-install -vDm4511 "bin/hsu" "${DESTDIR}/usr/bin/hsu"
-if [ ! -f "${DESTDIR}/etc/hsurc" ]; then
-    install -vDm0400 "hsurc.default" "${DESTDIR}/etc/hsurc"
-fi
-
-install -vDm0644 "comp/_hakurei" "${DESTDIR}/usr/share/zsh/site-functions/_hakurei"

dist/release.sh

@@ -1,36 +0,0 @@
-#!/bin/sh -e
-cd "$(dirname -- "$0")/.."
-VERSION="${HAKUREI_VERSION:-untagged}"
-prefix="${PREFIX:-/usr}"
-pname="hakurei-${VERSION}-$(go env GOARCH)"
-out="${DESTDIR:-dist}/${pname}"
-
-destroy_workdir() {
-  rm -rf "${out}"
-}
-trap destroy_workdir EXIT
-
-echo '# Preparing distribution files.'
-mkdir -p "${out}"
-cp -v "README.md" "dist/hsurc.default" "dist/install.sh" "${out}"
-cp -rv "dist/comp" "${out}"
-echo
-
-echo '# Building hakurei.'
-go generate ./...
-go build -trimpath -v -o "${out}/bin/" -ldflags "-s -w
-  -buildid= -linkmode external -extldflags=-static
-  -X hakurei.app/internal/info.buildVersion=${VERSION}
-  -X hakurei.app/internal/info.hakureiPath=${prefix}/bin/hakurei
-  -X hakurei.app/internal/info.hsuPath=${prefix}/bin/hsu
-  -X main.hakureiPath=${prefix}/bin/hakurei" ./...
-echo
-
-echo '# Testing hakurei.'
-go test -ldflags='-buildid= -linkmode external -extldflags=-static' ./...
-echo
-
-echo '# Creating distribution.'
-rm -f "${out}.tar.gz" && tar -C "${out}/.." -vczf "${out}.tar.gz" "${pname}"
-(cd "${out}/.." && sha512sum "${pname}.tar.gz" > "${pname}.tar.gz.sha512")
-echo

flake.nix

@@ -141,7 +141,7 @@
                 PATH="${pkgs.pkgsStatic.musl.bin}/bin:$PATH" \
                 DESTDIR="$out" \
                 HAKUREI_VERSION="v${hakurei.version}" \
-                  ./dist/release.sh
+                  ./all.sh
               '';
         }
       );

package.nix

@@ -116,7 +116,7 @@ buildGo126Module rec {
       ];
     in
     ''
-      install -D --target-directory=$out/share/zsh/site-functions dist/comp/*
+      install -D --target-directory=$out/share/zsh/site-functions cmd/dist/comp/*
 
       mkdir "$out/libexec"
       mv "$out"/bin/* "$out/libexec/"