1 /*
2  * Copyright (C) 2019 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #define LOG_TAG "sysprop_api_dump_main"
18 
19 #include <android-base/file.h>
20 #include <android-base/logging.h>
21 #include <google/protobuf/text_format.h>
22 
23 #include <algorithm>
24 #include <cstdio>
25 #include <cstdlib>
26 #include <map>
27 #include <string>
28 
29 #include "Common.h"
30 
31 namespace {
32 
33 [[noreturn]] void PrintUsage(const char* exe_name) {
34   std::printf("Usage: %s output_file sysprop_files...\n", exe_name);
35   std::exit(EXIT_FAILURE);
36 }
37 
38 }  // namespace
39 
40 int main(int argc, char* argv[]) {
41   if (argc < 3) {
42     std::fprintf(stderr, "%s needs at least 2 arguments\n", argv[0]);
43     PrintUsage(argv[0]);
44   }
45 
46   sysprop::SyspropLibraryApis api;
47   std::map<std::string, sysprop::Properties> modules;
48 
49   for (int i = 2; i < argc; ++i) {
50     if (auto res = ParseProps(argv[i]); res.ok()) {
51       if (!modules.emplace(res->module(), *res).second) {
52         LOG(FATAL) << "duplicated module name " << res->module();
53       }
54     } else {
55       LOG(FATAL) << "parsing sysprop file " << argv[i]
56                  << " failed: " << res.error();
57     }
58   }
59 
60   for (auto& [name, props] : modules) {
61     auto& prop_list = *props.mutable_prop();
62 
63     // remove internals
64     auto is_internal = [](auto& prop) {
65       return prop.scope() == sysprop::Internal;
66     };
67     prop_list.erase(
68         std::remove_if(prop_list.begin(), prop_list.end(), is_internal),
69         prop_list.end());
70 
71     if (prop_list.empty()) continue;
72 
73     // ... and then sort to normalize
74     std::sort(prop_list.begin(), prop_list.end(),
75               [](auto& a, auto& b) { return a.api_name() < b.api_name(); });
76     *api.add_props() = std::move(props);
77   }
78 
79   std::string res;
80   if (!google::protobuf::TextFormat::PrintToString(api, &res)) {
81     LOG(FATAL) << "dumping API failed";
82   }
83 
84   if (!android::base::WriteStringToFile(res, argv[1])) {
85     PLOG(FATAL) << "writing API file to " << argv[1] << " failed";
86   }
87 }
88