internal/rosa/package: migrate gnutls

This is the first nontrivial package to be migrated to azalea. Validated to generate identical IR.

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

internal/rosa/state.go

@@ -8,6 +8,7 @@ import (
 	"io/fs"
 	"net/http"
 	"path/filepath"
+	"reflect"
 	"runtime"
 	"slices"
 	"strconv"
@@ -373,6 +374,13 @@ func (s *S) Collect() (handles P) {
 	return
 }
 
+// deferredGit is a call to Toolchain.newTagRemote from azalea.
+type deferredGit struct {
+	url      string
+	tag      string
+	checksum string
+}
+
 // getS must be called before accessing s. This value is not currently safe for
 // concurrent use, but the underlying frame is immutable.
 func (s *S) getS() []azalea.Frame {
@@ -381,6 +389,12 @@ func (s *S) getS() []azalea.Frame {
 		k := func(name string) unique.Handle[azalea.Ident] {
 			return unique.Make(azalea.Ident(name))
 		}
+
+		var (
+			identDefault = k("default")
+			identArch    = k(s.arch)
+		)
+
 		s.s = make([]azalea.Frame, 1, 1<<4)
 		s.s[0].Val = map[unique.Handle[azalea.Ident]]any{
 			k("jobsE"):      jobsE,
@@ -428,9 +442,45 @@ func (s *S) getS() []azalea.Frame {
 				return
 			}},
 
+			// state helpers
+
+			k("arch"): {F: func(
+				args azalea.FArgs,
+			) (v any, set bool, err error) {
+				var fallback any
+				for _, arg := range args {
+					switch arg.K {
+					case identDefault:
+						fallback = arg.V
+						continue
+
+					case identArch:
+						return arg.V, true, nil
+					}
+				}
+
+				return fallback, fallback != nil, nil
+			}},
+
 			// convenience functions
 
-			unique.Make(azalea.Ident("remoteGitLab")): {F: func(
+			k("remoteGit"): {F: func(
+				args azalea.FArgs,
+			) (v any, set bool, err error) {
+				var a deferredGit
+				if err = args.Apply(map[unique.Handle[azalea.Ident]]any{
+					k("url"):      &a.url,
+					k("tag"):      &a.tag,
+					k("checksum"): &a.checksum,
+				}); err != nil {
+					return
+				}
+				v = a
+				set = true
+				return
+			}},
+
+			k("remoteGitLab"): {F: func(
 				args azalea.FArgs,
 			) (v any, set bool, err error) {
 				var domain, suffix, ref, checksum string
@@ -526,7 +576,7 @@ func (ctx *evalContext) f(
 
 		anitya  int64
 		version string
-		source  pkg.Artifact
+		sourceA any
 		helper  Helper
 
 		inputs, runtimes azalea.Array
@@ -537,7 +587,7 @@ func (ctx *evalContext) f(
 		k("anitya"):      &anitya,
 
 		k("version"): &version,
-		k("source"):  &source,
+		k("source"):  &sourceA,
 
 		k("writable"):    &attr.Writable,
 		k("chmod"):       &attr.Chmod,
@@ -581,6 +631,21 @@ func (ctx *evalContext) f(
 
 	meta.ID = int(anitya)
 	meta.f = func(t Toolchain) (pkg.Artifact, string) {
+		var source pkg.Artifact
+		switch p := sourceA.(type) {
+		case pkg.Artifact:
+			source = p
+
+		case deferredGit:
+			source = t.newTagRemote(p.url, p.tag, p.checksum)
+
+		default:
+			panic(azalea.TypeError{
+				Concrete: reflect.TypeOf(sourceA),
+				Asserted: reflect.TypeFor[pkg.Artifact](),
+			})
+		}
+
 		return t.NewPackage(
 			meta.Name,
 			version,