aa812d122c
Allow running Soong in a headless delve debugger by passing SOONG_DELVE=<listen addr> in the environment. Bug: 80165685 Test: SOONG_DELVE=:1234 m nothing Change-Id: Icfc893c8a8354a9bbc99112d9c83259cb41906d1
75 lines
2.4 KiB
Go
75 lines
2.4 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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"os"
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"os/exec"
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"strings"
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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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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, _ = exec.LookPath("dlv")
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originalEnv = make(map[string]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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}
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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 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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err := env.WriteEnvFile(envFile.String(), envDeps)
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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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