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// Copyright 2024 Google Inc. All rights reserved.
//
// 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.
package release_config_lib
import (
"encoding/json"
"fmt"
"io/fs"
"os"
"os/exec"
"path/filepath"
"regexp"
"strings"
"google.golang.org/protobuf/encoding/prototext"
"google.golang.org/protobuf/proto"
)
var (
disableWarnings bool
containerRegexp, _ = regexp.Compile("^[a-z][a-z0-9]*([._][a-z][a-z0-9]*)*$")
)
type StringList []string
func (l *StringList) Set(v string) error {
*l = append(*l, v)
return nil
}
func (l *StringList) String() string {
return fmt.Sprintf("%v", *l)
}
// Write a marshalled message to a file.
//
// Marshal the message based on the extension of the path we are writing it to.
//
// Args:
//
// path string: the path of the file to write to. Directories are not created.
// Supported extensions are: ".json", ".pb", and ".textproto".
// message proto.Message: the message to write.
//
// Returns:
//
// error: any error encountered.
func WriteMessage(path string, message proto.Message) (err error) {
var data []byte
switch filepath.Ext(path) {
case ".json":
data, err = json.MarshalIndent(message, "", " ")
case ".pb":
data, err = proto.Marshal(message)
case ".textproto":
data, err = prototext.MarshalOptions{Multiline: true}.Marshal(message)
default:
return fmt.Errorf("Unknown message format for %s", path)
}
if err != nil {
return err
}
return os.WriteFile(path, data, 0644)
}
// Read a message from a file.
//
// The message is unmarshalled based on the extension of the file read.
//
// Args:
//
// path string: the path of the file to read.
// message proto.Message: the message to unmarshal the message into.
//
// Returns:
//
// error: any error encountered.
func LoadMessage(path string, message proto.Message) error {
data, err := os.ReadFile(path)
if err != nil {
return err
}
switch filepath.Ext(path) {
case ".json":
return json.Unmarshal(data, message)
case ".pb":
return proto.Unmarshal(data, message)
case ".textproto":
return prototext.Unmarshal(data, message)
}
return fmt.Errorf("Unknown message format for %s", path)
}
// Call Func for any textproto files found in {root}/{subdir}.
func WalkTextprotoFiles(root string, subdir string, Func fs.WalkDirFunc) error {
path := filepath.Join(root, subdir)
if _, err := os.Stat(path); err != nil {
// Missing subdirs are not an error.
return nil
}
return filepath.WalkDir(path, func(path string, d fs.DirEntry, err error) error {
if err != nil {
return err
}
if strings.HasSuffix(d.Name(), ".textproto") && d.Type().IsRegular() {
return Func(path, d, err)
}
return nil
})
}
// Turn off all warning output
func DisableWarnings() {
disableWarnings = true
}
func warnf(format string, args ...any) (n int, err error) {
if !disableWarnings {
return fmt.Fprintf(os.Stderr, format, args...)
}
return 0, nil
}
func validContainer(container string) bool {
return containerRegexp.MatchString(container)
}
// Returns the default value for release config artifacts.
func GetDefaultOutDir() string {
outEnv := os.Getenv("OUT_DIR")
if outEnv == "" {
outEnv = "out"
}
return filepath.Join(outEnv, "soong", "release-config")
}
// Find the top of the workspace.
//
// This mirrors the logic in build/envsetup.sh's gettop().
func GetTopDir() (topDir string, err error) {
workingDir, err := os.Getwd()
if err != nil {
return
}
topFile := "build/make/core/envsetup.mk"
for topDir = workingDir; topDir != "/"; topDir = filepath.Dir(topDir) {
if _, err = os.Stat(filepath.Join(topDir, topFile)); err == nil {
return filepath.Rel(workingDir, topDir)
}
}
return "", fmt.Errorf("Unable to locate top of workspace")
}
// Return the default list of map files to use.
func GetDefaultMapPaths(queryMaps bool) (defaultMapPaths StringList, err error) {
var defaultLocations StringList
workingDir, err := os.Getwd()
if err != nil {
return
}
defer func() {
os.Chdir(workingDir)
}()
topDir, err := GetTopDir()
os.Chdir(topDir)
defaultLocations = StringList{
"build/release/release_config_map.textproto",
"vendor/google_shared/build/release/release_config_map.textproto",
"vendor/google/release/release_config_map.textproto",
}
for _, path := range defaultLocations {
if _, err = os.Stat(path); err == nil {
defaultMapPaths = append(defaultMapPaths, path)
}
}
var prodMaps string
if queryMaps {
getBuildVar := exec.Command("build/soong/soong_ui.bash", "--dumpvar-mode", "PRODUCT_RELEASE_CONFIG_MAPS")
var stdout strings.Builder
getBuildVar.Stdin = strings.NewReader("")
getBuildVar.Stdout = &stdout
err = getBuildVar.Run()
if err != nil {
return
}
prodMaps = stdout.String()
} else {
prodMaps = os.Getenv("PRODUCT_RELEASE_CONFIG_MAPS")
}
prodMaps = strings.TrimSpace(prodMaps)
if len(prodMaps) > 0 {
defaultMapPaths = append(defaultMapPaths, strings.Split(prodMaps, " ")...)
}
return
}
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