internal/rosa/gnu: grep artifact

Some GNU software do not like the grep in toybox.

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

internal/rosa/all.go

@@ -24,6 +24,7 @@ const (
 	Git
 	Go
 	Gperf
+	Grep
 	Gzip
 	Hakurei
 	HakureiDist
@@ -104,6 +105,7 @@ func ResolveName(name string) (p PArtifact, ok bool) {
 		"git":               Git,
 		"go":                Go,
 		"gperf":             Gperf,
+		"grep":              Grep,
 		"gzip":              Gzip,
 		"hakurei":           Hakurei,
 		"hakurei-dist":      HakureiDist,

internal/rosa/gnu.go

@@ -49,8 +49,7 @@ func (t Toolchain) newAutoconf() pkg.Artifact {
 		checksum = "-c5blYkC-xLDer3TWEqJTyh1RLbOd1c5dnRLKsDnIrg_wWNOLBpaqMY8FvmUFJ33"
 	)
 	return t.NewViaMake("autoconf", version, pkg.NewHTTPGetTar(
-		nil,
+		nil, "https://ftpmirror.gnu.org/gnu/autoconf/autoconf-"+version+".tar.gz",
-		"https://ftpmirror.gnu.org/gnu/autoconf/autoconf-"+version+".tar.gz",
 		mustDecode(checksum),
 		pkg.TarGzip,
 	), &MakeAttr{
@@ -250,6 +249,31 @@ func (t Toolchain) newGawk() pkg.Artifact {
 }
 func init() { artifactsF[Gawk] = Toolchain.newGawk }
 
+func (t Toolchain) newGrep() pkg.Artifact {
+	const (
+		version  = "3.12"
+		checksum = "qMB4RjaPNRRYsxix6YOrjE8gyAT1zVSTy4nW4wKW9fqa0CHYAuWgPwDTirENzm_1"
+	)
+	return t.NewViaMake("grep", version, pkg.NewHTTPGetTar(
+		nil, "https://ftpmirror.gnu.org/gnu/grep/grep-"+version+".tar.gz",
+		mustDecode(checksum),
+		pkg.TarGzip,
+	), &MakeAttr{
+		Writable: true,
+		ScriptEarly: `
+cd /usr/src/grep
+
+test_disable() { chmod +w "$2" && echo "$1" > "$2"; }
+
+test_disable '#!/bin/sh' gnulib-tests/test-c32ispunct.sh
+test_disable 'int main(){return 0;}' gnulib-tests/test-c32ispunct.c
+`,
+	},
+		t.Load(Diffutils),
+	)
+}
+func init() { artifactsF[Grep] = Toolchain.newGrep }
+
 func (t Toolchain) newFindutils() pkg.Artifact {
 	const (
 		version  = "4.10.0"