From 56567307ec793ab96c665950f6c643965ada3ea9 Mon Sep 17 00:00:00 2001
From: Ophestra <cat@gensokyo.uk>
Date: Sat, 21 Feb 2026 18:09:51 +0900
Subject: [PATCH] internal/rosa: gnu tar artifact

Initially, libarchive was going to be used, but its test suite simply does not want to work under musl, not even with libiconv. The ticket last discussing this ceased any activity in 2020.

Signed-off-by: Ophestra <cat@gensokyo.uk>
---
 internal/rosa/all.go |  2 ++
 internal/rosa/gnu.go | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/internal/rosa/all.go b/internal/rosa/all.go
index f6ae034..aabc8a2 100644
--- a/internal/rosa/all.go
+++ b/internal/rosa/all.go
@@ -82,6 +82,7 @@ const (
 	Setuptools
 	SquashfsTools
 	TamaGo
+	Tar
 	Texinfo
 	Toybox
 	toyboxEarly
@@ -204,6 +205,7 @@ func ResolveName(name string) (p PArtifact, ok bool) {
 		"setuptools":        Setuptools,
 		"squashfs-tools":    SquashfsTools,
 		"tamago":            TamaGo,
+		"tar":               Tar,
 		"texinfo":           Texinfo,
 		"toybox":            Toybox,
 		"unzip":             Unzip,
diff --git a/internal/rosa/gnu.go b/internal/rosa/gnu.go
index 358d954..9e6951e 100644
--- a/internal/rosa/gnu.go
+++ b/internal/rosa/gnu.go
@@ -419,6 +419,38 @@ func (t Toolchain) newLibiconv() pkg.Artifact {
 }
 func init() { artifactsF[Libiconv] = Toolchain.newLibiconv }
 
+func (t Toolchain) newTar() pkg.Artifact {
+	const (
+		version  = "1.35"
+		checksum = "zSaoSlVUDW0dSfm4sbL4FrXLFR8U40Fh3zY5DWhR5NCIJ6GjU6Kc4VZo2-ZqpBRA"
+	)
+	return t.NewViaMake("tar", version, pkg.NewHTTPGetTar(
+		nil, "https://ftpmirror.gnu.org/gnu/tar/tar-"+version+".tar.gz",
+		mustDecode(checksum),
+		pkg.TarGzip,
+	), &MakeAttr{
+		Env: []string{
+			// very expensive
+			"TARTEST_SKIP_LARGE_FILES=1",
+		},
+		Configure: [][2]string{
+			{"disable-acl"},
+			{"without-posix-acls"},
+			{"without-xattrs"},
+		},
+		Make: []string{
+			`TESTSUITEFLAGS="-j$(nproc)"`,
+		},
+	},
+		t.Load(Diffutils),
+
+		t.Load(Gzip),
+		t.Load(Bzip2),
+		t.Load(Zstd),
+	)
+}
+func init() { artifactsF[Tar] = Toolchain.newTar }
+
 func (t Toolchain) newBinutils() pkg.Artifact {
 	const (
 		version  = "2.45"