848e00edc0
If SOONG_DELVE_PATH=<path> is set, Soong will use that as the path to dlv. Otherwise, it will use the one on $PATH as usual. Test: Manual. Change-Id: Id4334f05d077a911750f601865bd3096d852d69c
127 lines
3.7 KiB
Go
127 lines
3.7 KiB
Go
// Copyright 2015 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package android
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import (
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"fmt"
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"os"
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"os/exec"
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"strings"
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"syscall"
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"android/soong/env"
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)
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// This file supports dependencies on environment variables. During build manifest generation,
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// any dependency on an environment variable is added to a list. During the singleton phase
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// a JSON file is written containing the current value of all used environment variables.
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// The next time the top-level build script is run, it uses the soong_env executable to
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// compare the contents of the environment variables, rewriting the file if necessary to cause
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// a manifest regeneration.
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var originalEnv map[string]string
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var soongDelveListen string
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var soongDelvePath string
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var soongDelveEnv []string
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func init() {
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// Delve support needs to read this environment variable very early, before NewConfig has created a way to
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// access originalEnv with dependencies. Store the value where soong_build can find it, it will manually
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// ensure the dependencies are created.
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soongDelveListen = os.Getenv("SOONG_DELVE")
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soongDelvePath = os.Getenv("SOONG_DELVE_PATH")
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if soongDelvePath == "" {
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soongDelvePath, _ = exec.LookPath("dlv")
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}
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originalEnv = make(map[string]string)
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soongDelveEnv = []string{}
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for _, env := range os.Environ() {
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idx := strings.IndexRune(env, '=')
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if idx != -1 {
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originalEnv[env[:idx]] = env[idx+1:]
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if env[:idx] != "SOONG_DELVE" && env[:idx] != "SOONG_DELVE_PATH" {
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soongDelveEnv = append(soongDelveEnv, env)
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}
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}
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}
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// Clear the environment to prevent use of os.Getenv(), which would not provide dependencies on environment
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// variable values. The environment is available through ctx.Config().Getenv, ctx.Config().IsEnvTrue, etc.
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os.Clearenv()
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}
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func ReexecWithDelveMaybe() {
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if soongDelveListen == "" {
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return
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}
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if soongDelvePath == "" {
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fmt.Fprintln(os.Stderr, "SOONG_DELVE is set but failed to find dlv")
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os.Exit(1)
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}
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dlvArgv := []string{
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soongDelvePath,
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"--listen=:" + soongDelveListen,
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"--headless=true",
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"--api-version=2",
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"exec",
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os.Args[0],
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"--",
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}
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dlvArgv = append(dlvArgv, os.Args[1:]...)
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os.Chdir(absSrcDir)
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syscall.Exec(soongDelvePath, dlvArgv, soongDelveEnv)
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fmt.Fprintln(os.Stderr, "exec() failed while trying to reexec with Delve")
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os.Exit(1)
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}
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// getenv checks either os.Getenv or originalEnv so that it works before or after the init()
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// function above. It doesn't add any dependencies on the environment variable, so it should
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// only be used for values that won't change. For values that might change use ctx.Config().Getenv.
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func getenv(key string) string {
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if originalEnv == nil {
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return os.Getenv(key)
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} else {
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return originalEnv[key]
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}
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}
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func EnvSingleton() Singleton {
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return &envSingleton{}
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}
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type envSingleton struct{}
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func (c *envSingleton) GenerateBuildActions(ctx SingletonContext) {
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envDeps := ctx.Config().EnvDeps()
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envFile := PathForOutput(ctx, ".soong.environment")
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if ctx.Failed() {
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return
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}
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data, err := env.EnvFileContents(envDeps)
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if err != nil {
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ctx.Errorf(err.Error())
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}
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err = WriteFileToOutputDir(envFile, data, 0666)
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if err != nil {
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ctx.Errorf(err.Error())
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}
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ctx.AddNinjaFileDeps(envFile.String())
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}
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