From 77ea27b0385eb5df851fad3a1582b1737145f449 Mon Sep 17 00:00:00 2001
From: Ophestra <cat@gensokyo.uk>
Date: Wed, 28 Jan 2026 22:51:03 +0900
Subject: [PATCH] internal/rosa: mksh artifact

This provides a shell, as part of the effort to replace busybox.

Signed-off-by: Ophestra <cat@gensokyo.uk>
---
 internal/rosa/all.go  |  2 ++
 internal/rosa/mksh.go | 30 ++++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 internal/rosa/mksh.go

diff --git a/internal/rosa/all.go b/internal/rosa/all.go
index 3b9ccb7..c76a15c 100644
--- a/internal/rosa/all.go
+++ b/internal/rosa/all.go
@@ -37,6 +37,7 @@ const (
 	M4
 	Make
 	Meson
+	Mksh
 	NSS
 	NSSCACert
 	Ninja
@@ -111,6 +112,7 @@ func (t Toolchain) ResolveName(name string) (p PArtifact, ok bool) {
 		"m4":                M4,
 		"make":              Make,
 		"meson":             Meson,
+		"mksh":              Mksh,
 		"nss":               NSS,
 		"nss-cacert":        NSSCACert,
 		"ninja":             Ninja,
diff --git a/internal/rosa/mksh.go b/internal/rosa/mksh.go
new file mode 100644
index 0000000..dd30f69
--- /dev/null
+++ b/internal/rosa/mksh.go
@@ -0,0 +1,30 @@
+package rosa
+
+import "hakurei.app/internal/pkg"
+
+func (t Toolchain) newMksh() pkg.Artifact {
+	const (
+		version  = "59c"
+		checksum = "0Zj-k4nXEu3IuJY4lvwD2OrC2t27GdZj8SPy4DoaeuBRH1padWb7oREpYgwY8JNq"
+	)
+	return t.New("mksh-"+version, false, stage3Concat(t, []pkg.Artifact{},
+		t.Load(Make),
+		t.Load(Perl),
+	), nil, []string{
+		"LDSTATIC=-static",
+	}, `
+cd "$(mktemp -d)"
+sh /usr/src/mksh/Build.sh
+./test.sh -C regress:no-ctty
+
+mkdir -p /work/{bin,system/bin}
+cp mksh /work/system/bin/sh
+ln -vs ../system/bin/sh /work/bin
+`, pkg.Path(AbsUsrSrc.Append("mksh"), false, pkg.NewHTTPGetTar(
+		nil,
+		"https://mbsd.evolvis.org/MirOS/dist/mir/mksh/mksh-R"+version+".tgz",
+		mustDecode(checksum),
+		pkg.TarGzip,
+	)))
+}
+func init() { artifactsF[Mksh] = Toolchain.newMksh }