05c25ccb4a
Store the current working directory and then change to the root directory so that all file accesses must go through helpers in the android package that properly track dependencies. Fixes: 146437378 Test: m checkbuild Change-Id: I12a0f907753fefd1997ab8b4ea2ac331234093cf
91 lines
2.9 KiB
Go
91 lines
2.9 KiB
Go
// 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 (
|
|
"os"
|
|
"os/exec"
|
|
"strings"
|
|
|
|
"android/soong/env"
|
|
)
|
|
|
|
// 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
|
|
|
|
func init() {
|
|
// Delve support needs to read this environment variable very early, before NewConfig has created a way to
|
|
// access originalEnv with dependencies. Store the value where soong_build can find it, it will manually
|
|
// ensure the dependencies are created.
|
|
SoongDelveListen = os.Getenv("SOONG_DELVE")
|
|
SoongDelvePath, _ = exec.LookPath("dlv")
|
|
|
|
originalEnv = make(map[string]string)
|
|
for _, env := range os.Environ() {
|
|
idx := strings.IndexRune(env, '=')
|
|
if idx != -1 {
|
|
originalEnv[env[:idx]] = env[idx+1:]
|
|
}
|
|
}
|
|
// Clear the environment to prevent use of os.Getenv(), which would not provide dependencies on environment
|
|
// variable values. The environment is available through ctx.Config().Getenv, ctx.Config().IsEnvTrue, etc.
|
|
os.Clearenv()
|
|
}
|
|
|
|
// getenv checks either os.Getenv or originalEnv so that it works before or after the init()
|
|
// function above. It doesn't add any dependencies on the environment variable, so it should
|
|
// only be used for values that won't change. For values that might change use ctx.Config().Getenv.
|
|
func getenv(key string) string {
|
|
if originalEnv == nil {
|
|
return os.Getenv(key)
|
|
} else {
|
|
return originalEnv[key]
|
|
}
|
|
}
|
|
|
|
func EnvSingleton() Singleton {
|
|
return &envSingleton{}
|
|
}
|
|
|
|
type envSingleton struct{}
|
|
|
|
func (c *envSingleton) GenerateBuildActions(ctx SingletonContext) {
|
|
envDeps := ctx.Config().EnvDeps()
|
|
|
|
envFile := PathForOutput(ctx, ".soong.environment")
|
|
if ctx.Failed() {
|
|
return
|
|
}
|
|
|
|
data, err := env.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())
|
|
}
|