Implement API dumper
sysprop_api_dump reads .sysprop files and produces a single .txt file
containing all of the signatures. It is written in TextFormat, and its
fields are sorted in lexicographical order to make the output
normalized.
Bug: 131637873
Test: mma && manually run the binary
Change-Id: Icf5e86bac89609afcaca8c29926beef8fa412d85
diff --git a/Android.bp b/Android.bp
index 5fa7fd9..e91a8d4 100644
--- a/Android.bp
+++ b/Android.bp
@@ -43,6 +43,12 @@
srcs: ["ApiChecker.cpp", "ApiCheckerMain.cpp"],
}
+cc_binary_host {
+ name: "sysprop_api_dump",
+ defaults: ["sysprop-defaults"],
+ srcs: ["ApiDumpMain.cpp"],
+}
+
cc_test_host {
name: "sysprop_test",
defaults: ["sysprop-defaults"],
diff --git a/ApiDumpMain.cpp b/ApiDumpMain.cpp
new file mode 100644
index 0000000..e607196
--- /dev/null
+++ b/ApiDumpMain.cpp
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#define LOG_TAG "sysprop_api_dump_main"
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <google/protobuf/text_format.h>
+
+#include <algorithm>
+#include <cstdio>
+#include <cstdlib>
+#include <map>
+#include <string>
+
+#include "Common.h"
+
+namespace {
+
+[[noreturn]] void PrintUsage(const char* exe_name) {
+ std::printf("Usage: %s output_file sysprop_files...\n", exe_name);
+ std::exit(EXIT_FAILURE);
+}
+
+} // namespace
+
+int main(int argc, char* argv[]) {
+ if (argc < 3) {
+ std::fprintf(stderr, "%s needs at least 2 arguments\n", argv[0]);
+ PrintUsage(argv[0]);
+ }
+
+ sysprop::SyspropLibraryApis api;
+ std::map<std::string, sysprop::Properties> modules;
+
+ for (int i = 2; i < argc; ++i) {
+ if (auto res = ParseProps(argv[i]); res) {
+ if (!modules.emplace(res->module(), *res).second) {
+ LOG(FATAL) << "duplicated module name " << res->module();
+ }
+ } else {
+ LOG(FATAL) << "parsing sysprop file " << argv[i]
+ << " failed: " << res.error();
+ }
+ }
+
+ for (auto& [name, props] : modules) {
+ // Sort properties to normalize
+ std::sort(props.mutable_prop()->begin(), props.mutable_prop()->end(),
+ [](auto& a, auto& b) { return a.api_name() < b.api_name(); });
+ *api.add_props() = std::move(props);
+ }
+
+ std::string res;
+ if (!google::protobuf::TextFormat::PrintToString(api, &res)) {
+ LOG(FATAL) << "dumping API failed";
+ }
+
+ if (!android::base::WriteStringToFile(res, argv[1])) {
+ PLOG(FATAL) << "writing API file to " << argv[1] << " failed";
+ }
+}
