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1// Copyright 2020 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 cc
16
17import (
18	"sort"
19	"strings"
20
21	"android/soong/android"
22)
23
24func init() {
25	// Use singleton type to gather all generated soong modules.
26	android.RegisterParallelSingletonType("stublibraries", stubLibrariesSingleton)
27}
28
29func stubLibrariesSingleton() android.Singleton {
30	return &stubLibraries{}
31}
32
33type stubLibraries struct {
34	stubLibraries       []string
35	vendorStubLibraries []string
36
37	apiListCoverageXmlPaths []string
38}
39
40// Check if the module defines stub, or itself is stub
41func IsStubTarget(info *LinkableInfo) bool {
42	return info != nil && (info.IsStubs || info.HasStubsVariants)
43}
44
45// Get target file name to be installed from this module
46func getInstalledFileName(ctx android.SingletonContext, m android.ModuleProxy) string {
47	for _, ps := range android.OtherModuleProviderOrDefault(
48		ctx, m, android.InstallFilesProvider).PackagingSpecs {
49		if name := ps.FileName(); name != "" {
50			return name
51		}
52	}
53	return ""
54}
55
56func (s *stubLibraries) GenerateBuildActions(ctx android.SingletonContext) {
57	// Visit all generated soong modules and store stub library file names.
58	stubLibraryMap := make(map[string]bool)
59	vendorStubLibraryMap := make(map[string]bool)
60	ctx.VisitAllModuleProxies(func(module android.ModuleProxy) {
61		if linkableInfo, ok := android.OtherModuleProvider(ctx, module, LinkableInfoProvider); ok {
62			if IsStubTarget(linkableInfo) {
63				if name := getInstalledFileName(ctx, module); name != "" {
64					stubLibraryMap[name] = true
65					if linkableInfo.InVendor {
66						vendorStubLibraryMap[name] = true
67					}
68				}
69			}
70			if linkableInfo.CcLibraryInterface && android.IsModulePreferredProxy(ctx, module) {
71				if p := linkableInfo.APIListCoverageXMLPath.String(); p != "" {
72					s.apiListCoverageXmlPaths = append(s.apiListCoverageXmlPaths, p)
73				}
74			}
75		}
76	})
77	s.stubLibraries = android.SortedKeys(stubLibraryMap)
78	s.vendorStubLibraries = android.SortedKeys(vendorStubLibraryMap)
79
80	android.WriteFileRule(ctx, StubLibrariesFile(ctx), strings.Join(s.stubLibraries, " "))
81}
82
83func StubLibrariesFile(ctx android.PathContext) android.WritablePath {
84	return android.PathForIntermediates(ctx, "stub_libraries.txt")
85}
86
87func (s *stubLibraries) MakeVars(ctx android.MakeVarsContext) {
88	// Convert stub library file names into Makefile variable.
89	ctx.Strict("STUB_LIBRARIES", strings.Join(s.stubLibraries, " "))
90	ctx.Strict("SOONG_STUB_VENDOR_LIBRARIES", strings.Join(s.vendorStubLibraries, " "))
91
92	// Export the list of API XML files to Make.
93	sort.Strings(s.apiListCoverageXmlPaths)
94	ctx.Strict("SOONG_CC_API_XML", strings.Join(s.apiListCoverageXmlPaths, " "))
95}
96