internal/rosa: cmake artifact

This is required for compiling the toolchain and many other programs.

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

internal/rosa/cmake.go

@@ -0,0 +1,31 @@
+package rosa
+
+import "hakurei.app/internal/pkg"
+
+// NewCMake returns a [pkg.Artifact] containing an installation of CMake.
+func (t Toolchain) NewCMake() pkg.Artifact {
+	const (
+		version  = "4.2.1"
+		checksum = "Y3OdbMsob6Xk2y1DCME6z4Fryb5_TkFD7knRT8dTNIRtSqbiCJyyDN9AxggN_I75"
+	)
+	return t.New("cmake-"+version, []pkg.Artifact{
+		t.NewMake(),
+		t.NewKernelHeaders(),
+	}, nil, nil, `
+# expected to be writable in the copy made during bootstrap
+chmod -R +w /usr/src/cmake/Tests
+
+cd "$(mktemp -d)"
+/usr/src/cmake/bootstrap \
+	--prefix=/system -- \
+	-DCMAKE_USE_OPENSSL=OFF
+make "-j$(nproc)"
+make DESTDIR=/work install
+`, pkg.Path(AbsUsrSrc.Append("cmake"), true,
+		pkg.NewHTTPGetTar(
+			nil, "https://github.com/Kitware/CMake/releases/download/"+
+				"v"+version+"/cmake-"+version+".tar.gz",
+			mustDecode(checksum),
+			pkg.TarGzip,
+		)))
+}