treewide: move build helper to more fitting places
Change-Id: I3d0cfe9283222d403ae369ec9db09201ad511e15
Reviewed-on: https://review.monogon.dev/c/monogon/+/3327
Reviewed-by: Serge Bazanski <serge@monogon.tech>
Tested-by: Jenkins CI
diff --git a/osbase/build/genosrelease/BUILD.bazel b/osbase/build/genosrelease/BUILD.bazel
new file mode 100644
index 0000000..f845cae
--- /dev/null
+++ b/osbase/build/genosrelease/BUILD.bazel
@@ -0,0 +1,18 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
+
+go_library(
+ name = "genosrelease_lib",
+ srcs = ["main.go"],
+ importpath = "source.monogon.dev/osbase/build/genosrelease",
+ visibility = ["//visibility:private"],
+ deps = ["@com_github_joho_godotenv//:godotenv"],
+)
+
+go_binary(
+ name = "genosrelease",
+ embed = [":genosrelease_lib"],
+ visibility = [
+ "//metropolis/installer:__subpackages__",
+ "//metropolis/node:__subpackages__",
+ ],
+)
diff --git a/osbase/build/genosrelease/defs.bzl b/osbase/build/genosrelease/defs.bzl
new file mode 100644
index 0000000..6fed483
--- /dev/null
+++ b/osbase/build/genosrelease/defs.bzl
@@ -0,0 +1,54 @@
+# Copyright 2020 The Monogon Project Authors.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+def _os_release_impl(ctx):
+ ctx.actions.run(
+ mnemonic = "GenOSRelease",
+ progress_message = "Generating os-release",
+ inputs = [ctx.info_file],
+ outputs = [ctx.outputs.out],
+ executable = ctx.executable._genosrelease,
+ arguments = [
+ "-status_file",
+ ctx.info_file.path,
+ "-out_file",
+ ctx.outputs.out.path,
+ "-stamp_var",
+ ctx.attr.stamp_var,
+ "-name",
+ ctx.attr.os_name,
+ "-id",
+ ctx.attr.os_id,
+ ],
+ )
+
+os_release = rule(
+ implementation = _os_release_impl,
+ attrs = {
+ "os_name": attr.string(mandatory = True),
+ "os_id": attr.string(mandatory = True),
+ "stamp_var": attr.string(mandatory = True),
+ "_genosrelease": attr.label(
+ default = Label("//osbase/build/genosrelease"),
+ cfg = "host",
+ executable = True,
+ allow_files = True,
+ ),
+ },
+ outputs = {
+ "out": "os-release",
+ },
+)
diff --git a/osbase/build/genosrelease/main.go b/osbase/build/genosrelease/main.go
new file mode 100644
index 0000000..adb8202
--- /dev/null
+++ b/osbase/build/genosrelease/main.go
@@ -0,0 +1,79 @@
+// Copyright 2020 The Monogon Project Authors.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// genosrelease provides rudimentary support to generate os-release files
+// following the freedesktop spec from arguments and stamping
+//
+// https://www.freedesktop.org/software/systemd/man/os-release.html
+package main
+
+import (
+ "flag"
+ "fmt"
+ "os"
+ "strings"
+
+ "github.com/joho/godotenv"
+)
+
+var (
+ flagStatusFile = flag.String("status_file", "", "path to bazel workspace status file")
+ flagOutFile = flag.String("out_file", "os-release", "path to os-release output file")
+ flagStampVar = flag.String("stamp_var", "", "variable to use as version from the workspace status file")
+ flagName = flag.String("name", "", "name parameter (see freedesktop spec)")
+ flagID = flag.String("id", "", "id parameter (see freedesktop spec)")
+)
+
+func main() {
+ flag.Parse()
+ statusFileContent, err := os.ReadFile(*flagStatusFile)
+ if err != nil {
+ fmt.Printf("Failed to open bazel workspace status file: %v\n", err)
+ os.Exit(1)
+ }
+ statusVars := make(map[string]string)
+ for _, line := range strings.Split(string(statusFileContent), "\n") {
+ line = strings.TrimSpace(line)
+ parts := strings.Fields(line)
+ if len(parts) != 2 {
+ continue
+ }
+ statusVars[parts[0]] = parts[1]
+ }
+
+ version, ok := statusVars[*flagStampVar]
+ if !ok {
+ fmt.Printf("%v key not set in bazel workspace status file\n", *flagStampVar)
+ os.Exit(1)
+ }
+ // As specified by https://www.freedesktop.org/software/systemd/man/os-release.html
+ osReleaseVars := map[string]string{
+ "NAME": *flagName,
+ "ID": *flagID,
+ "VERSION": version,
+ "VERSION_ID": version,
+ "PRETTY_NAME": *flagName + " " + version,
+ }
+ osReleaseContent, err := godotenv.Marshal(osReleaseVars)
+ if err != nil {
+ fmt.Printf("Failed to encode os-release file: %v\n", err)
+ os.Exit(1)
+ }
+ if err := os.WriteFile(*flagOutFile, []byte(osReleaseContent), 0644); err != nil {
+ fmt.Printf("Failed to write os-release file: %v\n", err)
+ os.Exit(1)
+ }
+}