ccls/src/cache.cc
2017-09-22 00:39:59 -07:00

72 lines
2.0 KiB
C++

#include "cache.h"
#include "indexer.h"
#include "language_server_api.h"
#include "platform.h"
#include <loguru/loguru.hpp>
#include <algorithm>
namespace {
std::string GetCachedBaseFileName(const std::string& cache_directory,
std::string source_file) {
assert(!cache_directory.empty());
std::replace(source_file.begin(), source_file.end(), '\\', '_');
std::replace(source_file.begin(), source_file.end(), '/', '_');
std::replace(source_file.begin(), source_file.end(), ':', '_');
return cache_directory + source_file;
}
} // namespace
std::unique_ptr<IndexFile> LoadCachedIndex(Config* config,
const std::string& filename) {
if (!config->enableCacheRead)
return nullptr;
optional<std::string> file_content = ReadContent(
GetCachedBaseFileName(config->cacheDirectory, filename) + ".json");
if (!file_content)
return nullptr;
return Deserialize(filename, *file_content, IndexFile::kCurrentVersion);
}
optional<std::string> LoadCachedFileContents(Config* config,
const std::string& filename) {
if (!config->enableCacheRead)
return nullopt;
return ReadContent(GetCachedBaseFileName(config->cacheDirectory, filename));
}
void WriteToCache(Config* config, IndexFile& file) {
if (!config->enableCacheWrite)
return;
std::string cache_basename =
GetCachedBaseFileName(config->cacheDirectory, file.path);
if (file.file_contents_.empty()) {
LOG_S(ERROR) << "No cached file contents; performing potentially stale "
<< "file-copy for " << file.path;
CopyFileTo(cache_basename, file.path);
} else {
std::ofstream cache_content;
cache_content.open(cache_basename);
assert(cache_content.good());
cache_content << file.file_contents_;
cache_content.close();
}
std::string indexed_content = Serialize(file);
std::ofstream cache;
cache.open(cache_basename + ".json");
assert(cache.good());
cache << indexed_content;
cache.close();
}