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1// Copyright 2018 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
15package java
16
17import (
18	"encoding/json"
19	"fmt"
20	"os"
21
22	"android/soong/android"
23)
24
25// This singleton generates android java dependency into to a json file. It does so for each
26// blueprint Android.bp resulting in a java.Module when either make, mm, mma, mmm or mmma is
27// called. Dependency info file is generated in $OUT/module_bp_java_depend.json.
28
29func init() {
30	android.RegisterSingletonType("jdeps_generator", jDepsGeneratorSingleton)
31}
32
33func jDepsGeneratorSingleton() android.Singleton {
34	return &jdepsGeneratorSingleton{}
35}
36
37type jdepsGeneratorSingleton struct {
38}
39
40const (
41	// Environment variables used to modify behavior of this singleton.
42	envVariableCollectJavaDeps = "SOONG_COLLECT_JAVA_DEPS"
43	jdepsJsonFileName          = "module_bp_java_deps.json"
44)
45
46func (j *jdepsGeneratorSingleton) GenerateBuildActions(ctx android.SingletonContext) {
47	if !ctx.Config().IsEnvTrue(envVariableCollectJavaDeps) {
48		return
49	}
50
51	moduleInfos := make(map[string]android.IdeInfo)
52
53	ctx.VisitAllModules(func(module android.Module) {
54		if !module.Enabled() {
55			return
56		}
57
58		ideInfoProvider, ok := module.(android.IDEInfo)
59		if !ok {
60			return
61		}
62		name := ideInfoProvider.BaseModuleName()
63		ideModuleNameProvider, ok := module.(android.IDECustomizedModuleName)
64		if ok {
65			name = ideModuleNameProvider.IDECustomizedModuleName()
66		}
67
68		dpInfo := moduleInfos[name]
69		ideInfoProvider.IDEInfo(&dpInfo)
70		dpInfo.Deps = android.FirstUniqueStrings(dpInfo.Deps)
71		dpInfo.Srcs = android.FirstUniqueStrings(dpInfo.Srcs)
72		dpInfo.Aidl_include_dirs = android.FirstUniqueStrings(dpInfo.Aidl_include_dirs)
73		dpInfo.Jarjar_rules = android.FirstUniqueStrings(dpInfo.Jarjar_rules)
74		dpInfo.Jars = android.FirstUniqueStrings(dpInfo.Jars)
75		moduleInfos[name] = dpInfo
76
77		mkProvider, ok := module.(android.AndroidMkDataProvider)
78		if !ok {
79			return
80		}
81		data := mkProvider.AndroidMk()
82		if data.Class != "" {
83			dpInfo.Classes = append(dpInfo.Classes, data.Class)
84		}
85
86		if dep, ok := module.(Dependency); ok {
87			dpInfo.Installed_paths = append(dpInfo.Installed_paths, dep.ImplementationJars().Strings()...)
88		}
89		dpInfo.Classes = android.FirstUniqueStrings(dpInfo.Classes)
90		dpInfo.Installed_paths = android.FirstUniqueStrings(dpInfo.Installed_paths)
91		moduleInfos[name] = dpInfo
92	})
93
94	jfpath := android.PathForOutput(ctx, jdepsJsonFileName).String()
95	err := createJsonFile(moduleInfos, jfpath)
96	if err != nil {
97		ctx.Errorf(err.Error())
98	}
99}
100
101func createJsonFile(moduleInfos map[string]android.IdeInfo, jfpath string) error {
102	file, err := os.Create(jfpath)
103	if err != nil {
104		return fmt.Errorf("Failed to create file: %s, relative: %v", jdepsJsonFileName, err)
105	}
106	defer file.Close()
107	buf, err := json.MarshalIndent(moduleInfos, "", "\t")
108	if err != nil {
109		return fmt.Errorf("Write file failed: %s, relative: %v", jdepsJsonFileName, err)
110	}
111	fmt.Fprintf(file, string(buf))
112	return nil
113}
114