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Factor out the cache logic for reuse
For the automatic cache management, rather than call `cvd cache` directly we will call `RunPrune` and bypass the `CommandHandler`. Test: cvd cache info Test: cvd cache prune Test: cvd cache empty
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,116 @@ | ||
| /* | ||
| * Copyright (C) 2025 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. | ||
| */ | ||
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| #include "host/commands/cvd/cache/cache.h" | ||
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| #include <algorithm> | ||
| #include <chrono> | ||
| #include <cstddef> | ||
| #include <string> | ||
| #include <string_view> | ||
| #include <utility> | ||
| #include <vector> | ||
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| #include <android-base/strings.h> | ||
| #include <fmt/format.h> | ||
| #include <json/json.h> | ||
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| #include "common/libs/utils/files.h" | ||
| #include "common/libs/utils/result.h" | ||
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| namespace cuttlefish { | ||
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| namespace { | ||
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| Result<std::vector<std::string>> CacheFilesDesc( | ||
| const std::string& cache_directory) { | ||
| std::vector<std::string> contents = CF_EXPECTF( | ||
| DirectoryContentsPaths(cache_directory), | ||
| "Failure retrieving contents of directory at \"{}\"", cache_directory); | ||
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| auto not_self_or_parent_directory = [](std::string_view filepath) { | ||
| return !android::base::EndsWith(filepath, ".") && | ||
| !android::base::EndsWith(filepath, ".."); | ||
| }; | ||
| std::vector<std::string> filtered; | ||
| std::copy_if(contents.begin(), contents.end(), std::back_inserter(filtered), | ||
| not_self_or_parent_directory); | ||
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| using ModTimePair = | ||
| std::pair<std::string, std::chrono::system_clock::time_point>; | ||
| std::vector<ModTimePair> to_sort; | ||
| for (const std::string& filename : filtered) { | ||
| to_sort.emplace_back( | ||
| std::pair(filename, CF_EXPECT(FileModificationTime(filename)))); | ||
| } | ||
| std::sort(to_sort.begin(), to_sort.end(), | ||
| [](const ModTimePair& a, const ModTimePair& b) { | ||
| return a.second > b.second; | ||
| }); | ||
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| std::vector<std::string> result; | ||
| for (const ModTimePair& pair : to_sort) { | ||
| result.emplace_back(pair.first); | ||
| } | ||
| return result; | ||
| } | ||
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| } // namespace | ||
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| Result<std::string> EmptyCache(const std::string& cache_directory) { | ||
| CF_EXPECT(EnsureDirectoryExists(cache_directory)); | ||
| CF_EXPECT(RecursivelyRemoveDirectory(cache_directory)); | ||
| CF_EXPECT(EnsureDirectoryExists(cache_directory)); | ||
| return fmt::format("Cache at \"{}\" has been emptied\n", cache_directory); | ||
| } | ||
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| Result<std::string> GetCacheInfo(const std::string& cache_directory, | ||
| const bool json_formatted) { | ||
| CF_EXPECT(EnsureDirectoryExists(cache_directory)); | ||
| std::size_t cache_size = CF_EXPECT(GetDiskUsageGigabytes(cache_directory)); | ||
| if (json_formatted) { | ||
| Json::Value json_output(Json::objectValue); | ||
| json_output["path"] = cache_directory; | ||
| json_output["size_in_GB"] = std::to_string(cache_size); | ||
| return json_output.toStyledString(); | ||
| } | ||
| return fmt::format("path:{}\nsize in GB:{}\n", cache_directory, cache_size); | ||
| } | ||
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| Result<std::string> PruneCache(const std::string& cache_directory, | ||
| const std::size_t allowed_size_GB) { | ||
| CF_EXPECT(EnsureDirectoryExists(cache_directory)); | ||
| std::size_t cache_size = CF_EXPECT(GetDiskUsageGigabytes(cache_directory)); | ||
| // Descending because elements are removed from the back | ||
| std::vector<std::string> cache_files = | ||
| CF_EXPECT(CacheFilesDesc(cache_directory)); | ||
| while (cache_size > allowed_size_GB) { | ||
| CHECK(!cache_files.empty()) << fmt::format( | ||
| "Cache size is {} of {}, but there are no more files for pruning.", | ||
| cache_size, allowed_size_GB); | ||
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| std::string next = cache_files.back(); | ||
| cache_files.pop_back(); | ||
| LOG(DEBUG) << fmt::format("Deleting \"{}\" for prune", next); | ||
| // handles removal of non-directory top-level files as well | ||
| CF_EXPECT(RecursivelyRemoveDirectory(next)); | ||
| cache_size = CF_EXPECT(GetDiskUsageGigabytes(cache_directory)); | ||
| } | ||
| return fmt::format("Cache at \"{}\": ~{}GB of {}GB max\n", cache_directory, | ||
| cache_size, allowed_size_GB); | ||
| } | ||
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| } // namespace cuttlefish |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| /* | ||
| * Copyright (C) 2025 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. | ||
| */ | ||
|
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| #include <cstddef> | ||
| #include <string> | ||
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| #include "common/libs/utils/result.h" | ||
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| namespace cuttlefish { | ||
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| Result<std::string> EmptyCache(const std::string& cache_directory); | ||
| Result<std::string> GetCacheInfo(const std::string& cache_directory, | ||
| bool json_formatted); | ||
| Result<std::string> PruneCache(const std::string& cache_directory, | ||
| std::size_t allowed_size_GB); | ||
|
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| } // namespace cuttlefish |
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