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https://github.com/NixOS/nix.git
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f3e1c47f47
The short answer for why we need to do this is so we can consistently do `#include "nix/..."`. Without this change, there are ways to still make that work, but they are hacky, and they have downsides such as making it harder to make sure headers from the wrong Nix library (e..g. `libnixexpr` headers in `libnixutil`) aren't being used. The C API alraedy used `nix_api_*`, so its headers are *not* put in subdirectories accordingly. Progress on #7876 We resisted doing this for a while because it would be annoying to not have the header source file pairs close by / easy to change file path/name from one to the other. But I am ameliorating that with symlinks in the next commit.
132 lines
3.4 KiB
C++
132 lines
3.4 KiB
C++
#include "nix/local-binary-cache-store.hh"
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#include "nix/globals.hh"
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#include "nix/nar-info-disk-cache.hh"
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#include "nix/signals.hh"
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#include <atomic>
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namespace nix {
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LocalBinaryCacheStoreConfig::LocalBinaryCacheStoreConfig(
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std::string_view scheme,
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PathView binaryCacheDir,
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const Params & params)
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: StoreConfig(params)
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, BinaryCacheStoreConfig(params)
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, binaryCacheDir(binaryCacheDir)
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{
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}
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std::string LocalBinaryCacheStoreConfig::doc()
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{
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return
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#include "local-binary-cache-store.md"
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;
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}
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struct LocalBinaryCacheStore : virtual LocalBinaryCacheStoreConfig, virtual BinaryCacheStore
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{
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/**
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* @param binaryCacheDir `file://` is a short-hand for `file:///`
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* for now.
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*/
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LocalBinaryCacheStore(
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std::string_view scheme,
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PathView binaryCacheDir,
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const Params & params)
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: StoreConfig(params)
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, BinaryCacheStoreConfig(params)
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, LocalBinaryCacheStoreConfig(scheme, binaryCacheDir, params)
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, Store(params)
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, BinaryCacheStore(params)
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{
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}
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void init() override;
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std::string getUri() override
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{
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return "file://" + binaryCacheDir;
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}
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protected:
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bool fileExists(const std::string & path) override;
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void upsertFile(const std::string & path,
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std::shared_ptr<std::basic_iostream<char>> istream,
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const std::string & mimeType) override
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{
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auto path2 = binaryCacheDir + "/" + path;
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static std::atomic<int> counter{0};
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Path tmp = fmt("%s.tmp.%d.%d", path2, getpid(), ++counter);
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AutoDelete del(tmp, false);
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StreamToSourceAdapter source(istream);
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writeFile(tmp, source);
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std::filesystem::rename(tmp, path2);
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del.cancel();
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}
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void getFile(const std::string & path, Sink & sink) override
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{
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try {
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readFile(binaryCacheDir + "/" + path, sink);
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} catch (SysError & e) {
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if (e.errNo == ENOENT)
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throw NoSuchBinaryCacheFile("file '%s' does not exist in binary cache", path);
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throw;
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}
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}
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StorePathSet queryAllValidPaths() override
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{
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StorePathSet paths;
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for (auto & entry : std::filesystem::directory_iterator{binaryCacheDir}) {
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checkInterrupt();
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auto name = entry.path().filename().string();
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if (name.size() != 40 ||
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!hasSuffix(name, ".narinfo"))
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continue;
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paths.insert(parseStorePath(
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storeDir + "/" + name.substr(0, name.size() - 8)
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+ "-" + MissingName));
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}
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return paths;
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}
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std::optional<TrustedFlag> isTrustedClient() override
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{
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return Trusted;
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}
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};
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void LocalBinaryCacheStore::init()
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{
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createDirs(binaryCacheDir + "/nar");
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createDirs(binaryCacheDir + "/" + realisationsPrefix);
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if (writeDebugInfo)
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createDirs(binaryCacheDir + "/debuginfo");
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createDirs(binaryCacheDir + "/log");
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BinaryCacheStore::init();
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}
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bool LocalBinaryCacheStore::fileExists(const std::string & path)
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{
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return pathExists(binaryCacheDir + "/" + path);
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}
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std::set<std::string> LocalBinaryCacheStoreConfig::uriSchemes()
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{
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if (getEnv("_NIX_FORCE_HTTP") == "1")
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return {};
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else
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return {"file"};
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}
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static RegisterStoreImplementation<LocalBinaryCacheStore, LocalBinaryCacheStoreConfig> regLocalBinaryCacheStore;
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}
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