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Colin Cross68f55102015-03-25 14:43:57 -07001// Copyright 2015 Google Inc. All rights reserved.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
Colin Cross635c3b02016-05-18 15:37:25 -070015package android
Colin Cross68f55102015-03-25 14:43:57 -070016
17import (
Lukacs T. Berkia5e0f712020-05-18 09:50:18 +020018 "fmt"
Dan Willemsen66068722017-05-08 21:15:59 +000019 "os"
20 "strings"
Lukacs T. Berkia5e0f712020-05-18 09:50:18 +020021 "syscall"
Dan Willemsen66068722017-05-08 21:15:59 +000022
Lukacs T. Berki3243aa52021-02-25 14:44:14 +010023 "android/soong/shared"
Colin Cross68f55102015-03-25 14:43:57 -070024)
25
26// This file supports dependencies on environment variables. During build manifest generation,
27// any dependency on an environment variable is added to a list. During the singleton phase
28// a JSON file is written containing the current value of all used environment variables.
29// The next time the top-level build script is run, it uses the soong_env executable to
30// compare the contents of the environment variables, rewriting the file if necessary to cause
31// a manifest regeneration.
32
Dan Willemsen66068722017-05-08 21:15:59 +000033var originalEnv map[string]string
Lukacs T. Berkia5e0f712020-05-18 09:50:18 +020034var soongDelveListen string
35var soongDelvePath string
Lukacs T. Berki7690c092021-02-26 14:27:36 +010036var isDebugging bool
Dan Willemsen66068722017-05-08 21:15:59 +000037
Lukacs T. Berki7690c092021-02-26 14:27:36 +010038func InitEnvironment(envFile string) {
39 var err error
40 originalEnv, err = shared.EnvFromFile(envFile)
41 if err != nil {
42 panic(err)
Lukacs T. Berki848e00e2020-11-06 10:42:50 +010043 }
Colin Crossaa812d12019-06-19 13:33:24 -070044
Lukacs T. Berki7690c092021-02-26 14:27:36 +010045 soongDelveListen = originalEnv["SOONG_DELVE"]
46 soongDelvePath = originalEnv["SOONG_DELVE_PATH"]
Dan Willemsen66068722017-05-08 21:15:59 +000047}
48
Lukacs T. Berki7690c092021-02-26 14:27:36 +010049// Returns whether the current process is running under Delve due to
50// ReexecWithDelveMaybe().
51func IsDebugging() bool {
52 return isDebugging
53}
Lukacs T. Berkia5e0f712020-05-18 09:50:18 +020054func ReexecWithDelveMaybe() {
Lukacs T. Berki7690c092021-02-26 14:27:36 +010055 isDebugging = os.Getenv("SOONG_DELVE_REEXECUTED") == "true"
56 if isDebugging || soongDelveListen == "" {
Lukacs T. Berkia5e0f712020-05-18 09:50:18 +020057 return
58 }
59
60 if soongDelvePath == "" {
61 fmt.Fprintln(os.Stderr, "SOONG_DELVE is set but failed to find dlv")
62 os.Exit(1)
63 }
Lukacs T. Berki7690c092021-02-26 14:27:36 +010064
65 soongDelveEnv := []string{}
66 for _, env := range os.Environ() {
67 idx := strings.IndexRune(env, '=')
68 if idx != -1 {
69 soongDelveEnv = append(soongDelveEnv, env)
70 }
71 }
72
73 soongDelveEnv = append(soongDelveEnv, "SOONG_DELVE_REEXECUTED=true")
74
Lukacs T. Berkia5e0f712020-05-18 09:50:18 +020075 dlvArgv := []string{
76 soongDelvePath,
77 "--listen=:" + soongDelveListen,
78 "--headless=true",
79 "--api-version=2",
80 "exec",
81 os.Args[0],
82 "--",
83 }
84 dlvArgv = append(dlvArgv, os.Args[1:]...)
85 os.Chdir(absSrcDir)
86 syscall.Exec(soongDelvePath, dlvArgv, soongDelveEnv)
87 fmt.Fprintln(os.Stderr, "exec() failed while trying to reexec with Delve")
88 os.Exit(1)
89}
90
Colin Cross54855dd2017-11-28 23:55:23 -080091func EnvSingleton() Singleton {
Colin Cross68f55102015-03-25 14:43:57 -070092 return &envSingleton{}
93}
94
95type envSingleton struct{}
96
Colin Cross54855dd2017-11-28 23:55:23 -080097func (c *envSingleton) GenerateBuildActions(ctx SingletonContext) {
Colin Crossaabf6792017-11-29 00:27:14 -080098 envDeps := ctx.Config().EnvDeps()
Colin Cross68f55102015-03-25 14:43:57 -070099
Lukacs T. Berki7690c092021-02-26 14:27:36 +0100100 envFile := PathForOutput(ctx, "soong.environment.used")
Dan Willemsen34cc69e2015-09-23 15:26:20 -0700101 if ctx.Failed() {
102 return
103 }
Colin Cross68f55102015-03-25 14:43:57 -0700104
Lukacs T. Berki3243aa52021-02-25 14:44:14 +0100105 data, err := shared.EnvFileContents(envDeps)
Colin Cross988414c2020-01-11 01:11:46 +0000106 if err != nil {
107 ctx.Errorf(err.Error())
108 }
109
110 err = WriteFileToOutputDir(envFile, data, 0666)
Colin Cross68f55102015-03-25 14:43:57 -0700111 if err != nil {
112 ctx.Errorf(err.Error())
113 }
114
Dan Willemsen34cc69e2015-09-23 15:26:20 -0700115 ctx.AddNinjaFileDeps(envFile.String())
Colin Cross68f55102015-03-25 14:43:57 -0700116}