| // Copyright 2015 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. |
| |
| // soong_env determines if the given soong environment file (usually ".soong.environment") is stale |
| // by comparing its contents to the current corresponding environment variable values. |
| // It fails if the file cannot be opened or corrupted, or its contents differ from the current |
| // values. |
| |
| package main |
| |
| import ( |
| "flag" |
| "fmt" |
| "os" |
| |
| "android/soong/env" |
| ) |
| |
| func usage() { |
| fmt.Fprintf(os.Stderr, "usage: soong_env env_file\n") |
| fmt.Fprintf(os.Stderr, "exits with success if the environment varibles in env_file match\n") |
| fmt.Fprintf(os.Stderr, "the current environment\n") |
| flag.PrintDefaults() |
| os.Exit(2) |
| } |
| |
| // This is a simple executable packaging, and the real work happens in env.StaleEnvFile. |
| func main() { |
| flag.Parse() |
| |
| if flag.NArg() != 1 { |
| usage() |
| } |
| |
| stale, err := env.StaleEnvFile(flag.Arg(0)) |
| if err != nil { |
| fmt.Fprintf(os.Stderr, "error: %s\n", err.Error()) |
| os.Exit(1) |
| } |
| |
| if stale { |
| os.Exit(1) |
| } |
| |
| os.Exit(0) |
| } |