internal/rosa/libxml2: fetch source via git

Eliminates the xz dependency. This also switches to meson to avoid pulling in autotools.

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

internal/rosa/libxml2.go

@@ -1,26 +1,22 @@
 package rosa
 
-import (
-	"strings"
-
-	"hakurei.app/internal/pkg"
-)
+import "hakurei.app/internal/pkg"
 
 func (t Toolchain) newLibxml2() (pkg.Artifact, string) {
 	const (
 		version  = "2.15.2"
-		checksum = "xba8VCofMsbWmQypA2__M9_RXNq9HDEuccjib6-tOni6OPngplRoAsYdY3NdYf8o"
+		checksum = "zwQvCIBnjzUFY-inX5ckfNT3mIezsCRV55C_Iztde5OnRTB3u33lfO5h03g7DK_8"
 	)
-	return t.NewPackage("libxml2", version, pkg.NewHTTPGet(
-		nil, "https://download.gnome.org/sources/libxml2/"+
-			strings.Join(strings.Split(version, ".")[:2], ".")+
-			"/libxml2-"+version+".tar.xz",
+	return t.NewPackage("libxml2", version, t.NewViaGit(
+		"https://gitlab.gnome.org/GNOME/libxml2.git",
+		"refs/tags/v"+version,
 		mustDecode(checksum),
 	), &PackageAttr{
-		SourceKind: SourceKindTarXZ,
-	}, (*MakeHelper)(nil),
+		// can't create shell.out: Read-only file system
+		Writable: true,
+	}, (*MesonHelper)(nil),
+		Git,
 		Diffutils,
-		XZ,
 	), version
 }
 func init() {