| // 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. |
| |
| package android |
| |
| import ( |
| "fmt" |
| "os" |
| "strings" |
| "syscall" |
| |
| "android/soong/shared" |
| ) |
| |
| // This file supports dependencies on environment variables. During build manifest generation, |
| // any dependency on an environment variable is added to a list. During the singleton phase |
| // a JSON file is written containing the current value of all used environment variables. |
| // The next time the top-level build script is run, it uses the soong_env executable to |
| // compare the contents of the environment variables, rewriting the file if necessary to cause |
| // a manifest regeneration. |
| |
| var originalEnv map[string]string |
| var soongDelveListen string |
| var soongDelvePath string |
| var isDebugging bool |
| |
| func InitEnvironment(envFile string) { |
| var err error |
| originalEnv, err = shared.EnvFromFile(envFile) |
| if err != nil { |
| panic(err) |
| } |
| |
| soongDelveListen = originalEnv["SOONG_DELVE"] |
| soongDelvePath = originalEnv["SOONG_DELVE_PATH"] |
| } |
| |
| // Returns whether the current process is running under Delve due to |
| // ReexecWithDelveMaybe(). |
| func IsDebugging() bool { |
| return isDebugging |
| } |
| func ReexecWithDelveMaybe() { |
| isDebugging = os.Getenv("SOONG_DELVE_REEXECUTED") == "true" |
| if isDebugging || soongDelveListen == "" { |
| return |
| } |
| |
| if soongDelvePath == "" { |
| fmt.Fprintln(os.Stderr, "SOONG_DELVE is set but failed to find dlv") |
| os.Exit(1) |
| } |
| |
| soongDelveEnv := []string{} |
| for _, env := range os.Environ() { |
| idx := strings.IndexRune(env, '=') |
| if idx != -1 { |
| soongDelveEnv = append(soongDelveEnv, env) |
| } |
| } |
| |
| soongDelveEnv = append(soongDelveEnv, "SOONG_DELVE_REEXECUTED=true") |
| |
| dlvArgv := []string{ |
| soongDelvePath, |
| "--listen=:" + soongDelveListen, |
| "--headless=true", |
| "--api-version=2", |
| "exec", |
| os.Args[0], |
| "--", |
| } |
| dlvArgv = append(dlvArgv, os.Args[1:]...) |
| os.Chdir(absSrcDir) |
| syscall.Exec(soongDelvePath, dlvArgv, soongDelveEnv) |
| fmt.Fprintln(os.Stderr, "exec() failed while trying to reexec with Delve") |
| os.Exit(1) |
| } |
| |
| func EnvSingleton() Singleton { |
| return &envSingleton{} |
| } |
| |
| type envSingleton struct{} |
| |
| func (c *envSingleton) GenerateBuildActions(ctx SingletonContext) { |
| envDeps := ctx.Config().EnvDeps() |
| |
| envFile := PathForOutput(ctx, "soong.environment.used") |
| if ctx.Failed() { |
| return |
| } |
| |
| data, err := shared.EnvFileContents(envDeps) |
| if err != nil { |
| ctx.Errorf(err.Error()) |
| } |
| |
| err = WriteFileToOutputDir(envFile, data, 0666) |
| if err != nil { |
| ctx.Errorf(err.Error()) |
| } |
| |
| ctx.AddNinjaFileDeps(envFile.String()) |
| } |