From b983917a6ef8c054347029c9f215f93ff8bd6214 Mon Sep 17 00:00:00 2001
From: Ophestra <cat@gensokyo.uk>
Date: Fri, 20 Feb 2026 18:45:31 +0900
Subject: [PATCH] internal/rosa: expose kernel source

This also removes the unused kernel helper.

Signed-off-by: Ophestra <cat@gensokyo.uk>
---
 internal/rosa/all.go    |  2 ++
 internal/rosa/kernel.go | 58 ++++++++++++++++++-----------------------
 2 files changed, 28 insertions(+), 32 deletions(-)

diff --git a/internal/rosa/all.go b/internal/rosa/all.go
index 81f7272..2198994 100644
--- a/internal/rosa/all.go
+++ b/internal/rosa/all.go
@@ -39,6 +39,7 @@ const (
 	HakureiDist
 	IniConfig
 	KernelHeaders
+	KernelSource
 	Kmod
 	LibXau
 	Libexpat
@@ -153,6 +154,7 @@ func ResolveName(name string) (p PArtifact, ok bool) {
 		"hakurei-dist":      HakureiDist,
 		"iniconfig":         IniConfig,
 		"kernel-headers":    KernelHeaders,
+		"kernel-source":     KernelSource,
 		"kmod":              Kmod,
 		"libXau":            LibXau,
 		"libexpat":          Libexpat,
diff --git a/internal/rosa/kernel.go b/internal/rosa/kernel.go
index 06c1d03..5aef20e 100644
--- a/internal/rosa/kernel.go
+++ b/internal/rosa/kernel.go
@@ -1,44 +1,38 @@
 package rosa
 
-import (
-	"slices"
+import "hakurei.app/internal/pkg"
 
-	"hakurei.app/internal/pkg"
-)
+const kernelVersion = "6.12.73"
 
-// newKernel is a helper for interacting with Kbuild.
-func (t Toolchain) newKernel(
-	flag int,
-	patches [][2]string,
-	script string,
-	extra ...pkg.Artifact,
-) pkg.Artifact {
-	const (
-		version  = "6.12.73"
-		checksum = "29oUBJKF1ULIv1-XQLpEUUc3LgjUSmyvOSskG37MYUcBlBjMk7RcbCTLrD7UfSM6"
-	)
-	return t.New("kernel-"+version, flag, slices.Concat([]pkg.Artifact{
-		t.Load(Make),
-	}, extra), nil, nil, `
-export LLVM=1
-export HOSTLDFLAGS="${LDFLAGS}"
-cd /usr/src/linux
-`+script, pkg.Path(AbsUsrSrc.Append("linux"), true, t.NewPatchedSource(
-		"kernel", version, pkg.NewHTTPGetTar(
-			nil,
-			"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/"+
-				"snapshot/linux-"+version+".tar.gz",
-			mustDecode(checksum),
-			pkg.TarGzip,
-		), false, patches...,
+func (t Toolchain) newKernelSource() pkg.Artifact {
+	const checksum = "29oUBJKF1ULIv1-XQLpEUUc3LgjUSmyvOSskG37MYUcBlBjMk7RcbCTLrD7UfSM6"
+	return t.New("kernel-"+kernelVersion+"-src", 0, nil, nil, nil, `
+mkdir -p /work/usr/src/
+cp -r /usr/src/linux /work/usr/src/
+chmod -R +w /work/usr/src/linux/
+`, pkg.Path(AbsUsrSrc.Append("linux"), false, pkg.NewHTTPGetTar(
+		nil, "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/"+
+			"snapshot/linux-"+kernelVersion+".tar.gz",
+		mustDecode(checksum),
+		pkg.TarGzip,
 	)))
 }
+func init() { artifactsF[KernelSource] = Toolchain.newKernelSource }
 
 func (t Toolchain) newKernelHeaders() pkg.Artifact {
-	return t.newKernel(TEarly, nil, `
-make "-j$(nproc)" \
+	return t.New("kernel-headers-"+kernelVersion, TEarly, []pkg.Artifact{
+		t.Load(Make),
+		t.Load(Rsync),
+
+		t.Load(KernelSource),
+	}, nil, nil, `
+cd /usr/src/linux
+make \
+	"-j$(nproc)" \
+	LLVM=1 \
+	HOSTLDFLAGS="${LDFLAGS}" \
 	INSTALL_HDR_PATH=/work/system \
 	headers_install
-`, t.Load(Rsync))
+`)
 }
 func init() { artifactsF[KernelHeaders] = Toolchain.newKernelHeaders }