internal/rosa: git artifact

This is required by the clang unit and regression tests.

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

cmd/mbf/main.go

@@ -149,6 +149,8 @@ func main() {
 				a = rosa.Std.NewBusybox()
 			case "musl":
 				a = rosa.Std.NewMusl(nil)
+			case "git":
+				a = rosa.Std.NewGit()
 			case "go":
 				a = rosa.Std.NewGo()
 			case "rsync":

internal/rosa/git.go

@@ -0,0 +1,27 @@
+package rosa
+
+import (
+	"hakurei.app/internal/pkg"
+)
+
+// NewGit returns a [pkg.Artifact] containing an installation of git.
+func (t Toolchain) NewGit() pkg.Artifact {
+	const (
+		version  = "2.52.0"
+		checksum = "uH3J1HAN_c6PfGNJd2OBwW4zo36n71wmkdvityYnrh8Ak0D1IifiAvEWz9Vi9DmS"
+	)
+	return t.New("git-"+version, []pkg.Artifact{
+		t.NewMake(),
+	}, nil, nil, `
+chmod -R +w /usr/src/git && cd /usr/src/git
+make configure
+./configure --prefix=/system
+make "-j$(nproc)" all
+make DESTDIR=/work install
+`, pkg.Path(AbsUsrSrc.Append("git"), true, pkg.NewHTTPGetTar(
+		nil, "https://www.kernel.org/pub/software/scm/git/"+
+			"git-"+version+".tar.gz",
+		mustDecode(checksum),
+		pkg.TarGzip,
+	)))
+}