feat(config): save __build_info in compiled config

src/rime/config/build_info_plugin.cc

@@ -0,0 +1,39 @@
+//
+// Copyright RIME Developers
+// Distributed under the BSD License
+//
+#include <boost/filesystem.hpp>
+#include <rime/service.h>
+#include <rime/config/config_compiler.h>
+#include <rime/config/config_types.h>
+#include <rime/config/plugins.h>
+
+namespace rime {
+
+bool BuildInfoPlugin::ReviewCompileOutput(
+    ConfigCompiler* compiler, an<ConfigResource> resource) {
+  return true;
+}
+
+bool BuildInfoPlugin::ReviewLinkOutput(
+    ConfigCompiler* compiler, an<ConfigResource> resource) {
+  auto build_info = (*resource)["__build_info"];
+  build_info["rime_version"] = RIME_VERSION;
+  auto timestamps = build_info["timestamps"];
+  compiler->EnumerateResources([&](an<ConfigResource> resource) {
+    if (!resource->loaded) {
+      LOG(WARNING) << "resource '" << resource->resource_id << "' not loaded.";
+      return;
+    }
+    auto file_name = resource->data->file_name();
+    if (file_name.empty()) {
+      return;
+    }
+    // TODO: store as 64-bit number to avoid the year 2038 problem
+    timestamps[resource->resource_id] =
+        (int) boost::filesystem::last_write_time(file_name);
+  });
+  return true;
+}
+
+}  // namespace rime

src/rime/config/config_compiler.cc

@@ -295,6 +295,13 @@ void ConfigCompiler::Pop() {
   graph_->Pop();
 }
 
+void ConfigCompiler::EnumerateResources(
+    function<void (an<ConfigResource> resource)> process_resource) {
+  for (const auto& r : graph_->resources) {
+    process_resource(r.second);
+  }
+}
+
 an<ConfigResource> ConfigCompiler::GetCompiledResource(
     const string& resource_id) const {
   return graph_->resources[resource_id];

src/rime/config/config_compiler.h

@@ -64,6 +64,8 @@ class ConfigCompiler {
   bool Parse(const string& key, const an<ConfigItem>& item);
   void Pop();
 
+  void EnumerateResources(
+      function<void (an<ConfigResource> resource)> process_resource);
   an<ConfigResource> GetCompiledResource(const string& resource_id) const;
   an<ConfigResource> Compile(const string& file_name);
   bool Link(an<ConfigResource> target);

src/rime/config/plugins.h

@@ -45,6 +45,12 @@ class LegacyDictionaryConfigPlugin : public ConfigCompilerPlugin {
   Review ReviewLinkOutput;
 };
 
+class BuildInfoPlugin : public ConfigCompilerPlugin {
+ public:
+  Review ReviewCompileOutput;
+  Review ReviewLinkOutput;
+};
+
 }  // namespace rime
 
 #endif  // RIME_CONFIG_PLUGINS_H_

src/rime/core_module.cc

@@ -25,6 +25,7 @@ static void rime_core_initialize() {
   config->InstallPlugin(new DefaultConfigPlugin);
   config->InstallPlugin(new LegacyPresetConfigPlugin);
   config->InstallPlugin(new LegacyDictionaryConfigPlugin);
+  config->InstallPlugin(new BuildInfoPlugin);
   r.Register("config", config);
   r.Register("schema", new SchemaComponent(config));
 }