Add 'third_party/nix/' from commit 'be66c7a6b24e3c3c6157fd37b86c7203d14acf10' r/724

git-subtree-dir: third_party/nix
git-subtree-mainline: cf8cd640c1adf74a3706efbcb0ea4625da106fb2
git-subtree-split: be66c7a6b24e3c3c6157fd37b86c7203d14acf10

1 files changed, 115 insertions, 0 deletions

diff --git a/third_party/nix/src/libstore/binary-cache-store.hh b/third_party/nix/src/libstore/binary-cache-store.hh
new file mode 100644
index 000000000000..af108880cba8
--- /dev/null
+++ b/third_party/nix/src/libstore/binary-cache-store.hh
@@ -0,0 +1,115 @@
+#pragma once
+
+#include "crypto.hh"
+#include "store-api.hh"
+
+#include "pool.hh"
+
+#include <atomic>
+
+namespace nix {
+
+struct NarInfo;
+
+class BinaryCacheStore : public Store
+{
+public:
+
+    const Setting<std::string> compression{this, "xz", "compression", "NAR compression method ('xz', 'bzip2', or 'none')"};
+    const Setting<bool> writeNARListing{this, false, "write-nar-listing", "whether to write a JSON file listing the files in each NAR"};
+    const Setting<Path> secretKeyFile{this, "", "secret-key", "path to secret key used to sign the binary cache"};
+    const Setting<Path> localNarCache{this, "", "local-nar-cache", "path to a local cache of NARs"};
+    const Setting<bool> parallelCompression{this, false, "parallel-compression",
+        "enable multi-threading compression, available for xz only currently"};
+
+private:
+
+    std::unique_ptr<SecretKey> secretKey;
+
+protected:
+
+    BinaryCacheStore(const Params & params);
+
+public:
+
+    virtual bool fileExists(const std::string & path) = 0;
+
+    virtual void upsertFile(const std::string & path,
+        const std::string & data,
+        const std::string & mimeType) = 0;
+
+    /* Note: subclasses must implement at least one of the two
+       following getFile() methods. */
+
+    /* Dump the contents of the specified file to a sink. */
+    virtual void getFile(const std::string & path, Sink & sink);
+
+    /* Fetch the specified file and call the specified callback with
+       the result. A subclass may implement this asynchronously. */
+    virtual void getFile(const std::string & path,
+        Callback<std::shared_ptr<std::string>> callback) noexcept;
+
+    std::shared_ptr<std::string> getFile(const std::string & path);
+
+protected:
+
+    bool wantMassQuery_ = false;
+    int priority = 50;
+
+public:
+
+    virtual void init();
+
+private:
+
+    std::string narMagic;
+
+    std::string narInfoFileFor(const Path & storePath);
+
+    void writeNarInfo(ref<NarInfo> narInfo);
+
+public:
+
+    bool isValidPathUncached(const Path & path) override;
+
+    void queryPathInfoUncached(const Path & path,
+        Callback<std::shared_ptr<ValidPathInfo>> callback) noexcept override;
+
+    Path queryPathFromHashPart(const string & hashPart) override
+    { unsupported("queryPathFromHashPart"); }
+
+    bool wantMassQuery() override { return wantMassQuery_; }
+
+    void addToStore(const ValidPathInfo & info, const ref<std::string> & nar,
+        RepairFlag repair, CheckSigsFlag checkSigs,
+        std::shared_ptr<FSAccessor> accessor) override;
+
+    Path addToStore(const string & name, const Path & srcPath,
+        bool recursive, HashType hashAlgo,
+        PathFilter & filter, RepairFlag repair) override;
+
+    Path addTextToStore(const string & name, const string & s,
+        const PathSet & references, RepairFlag repair) override;
+
+    void narFromPath(const Path & path, Sink & sink) override;
+
+    BuildResult buildDerivation(const Path & drvPath, const BasicDerivation & drv,
+        BuildMode buildMode) override
+    { unsupported("buildDerivation"); }
+
+    void ensurePath(const Path & path) override
+    { unsupported("ensurePath"); }
+
+    ref<FSAccessor> getFSAccessor() override;
+
+    void addSignatures(const Path & storePath, const StringSet & sigs) override;
+
+    std::shared_ptr<std::string> getBuildLog(const Path & path) override;
+
+    int getPriority() override { return priority; }
+
+};
+
+MakeError(NoSuchBinaryCacheFile, Error);
+
+}