internal/rosa: bash artifact

Required by llvm unit and regression tests.

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

internal/rosa/gnu.go

@@ -139,3 +139,30 @@ make DESTDIR=/work install
 		pkg.TarGzip,
 	)))
 }
+
+// NewBash returns a [pkg.Artifact] containing an installation of GNU Bash.
+func (t Toolchain) NewBash() pkg.Artifact {
+	const (
+		version  = "5.3"
+		checksum = "4LQ_GRoB_ko-Ih8QPf_xRKA02xAm_TOxQgcJLmFDT6udUPxTAWrsj-ZNeuTusyDq"
+	)
+	return t.New("bash-"+version, []pkg.Artifact{
+		t.NewMake(),
+	}, nil, nil, `
+cd /usr/src/bash
+test_disable() { chmod +w "$2" && echo "$1" > "$2"; }
+
+cd "$(mktemp -d)"
+/usr/src/bash/configure \
+	--prefix=/system \
+	--build="${ROSA_TRIPLE}" \
+	--without-bash-malloc
+make "-j$(nproc)" check
+make DESTDIR=/work install
+`, pkg.Path(AbsUsrSrc.Append("bash"), true, pkg.NewHTTPGetTar(
+		nil,
+		"https://ftp.gnu.org/gnu/bash/bash-"+version+".tar.gz",
+		mustDecode(checksum),
+		pkg.TarGzip,
+	)))
+}