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authorEelco Dolstra <eelco.dolstra@logicblox.com>2016-02-24T13·48+0100
committerEelco Dolstra <eelco.dolstra@logicblox.com>2016-02-24T13·48+0100
commit263187a2ec0a2ddd16cfd8c54c55e3455c9cd987 (patch)
tree1b39bcf8979f35fa9fb4b4dde6440219c9451b82 /src/libstore/local-binary-cache-store.cc
parentb584a0e7dea6fd903f8a285ee3a997ba535b44a7 (diff)
Move BinaryCacheStore / LocalBinaryCacheStore from Hydra
So you can now do:

  $ NIX_REMOTE=file:///tmp/binary-cache nix-store -qR /nix/store/...
Diffstat (limited to 'src/libstore/local-binary-cache-store.cc')
-rw-r--r--src/libstore/local-binary-cache-store.cc44
1 files changed, 44 insertions, 0 deletions
diff --git a/src/libstore/local-binary-cache-store.cc b/src/libstore/local-binary-cache-store.cc
new file mode 100644
index 000000000000..5714688e02df
--- /dev/null
+++ b/src/libstore/local-binary-cache-store.cc
@@ -0,0 +1,44 @@
+#include "local-binary-cache-store.hh"
+
+namespace nix {
+
+LocalBinaryCacheStore::LocalBinaryCacheStore(std::shared_ptr<Store> localStore,
+    const Path & secretKeyFile, const Path & publicKeyFile,
+    const Path & binaryCacheDir)
+    : BinaryCacheStore(localStore, secretKeyFile, publicKeyFile)
+    , binaryCacheDir(binaryCacheDir)
+{
+}
+
+void LocalBinaryCacheStore::init()
+{
+    createDirs(binaryCacheDir + "/nar");
+    BinaryCacheStore::init();
+}
+
+static void atomicWrite(const Path & path, const std::string & s)
+{
+    Path tmp = path + ".tmp." + std::to_string(getpid());
+    AutoDelete del(tmp, false);
+    writeFile(tmp, s);
+    if (rename(tmp.c_str(), path.c_str()))
+        throw SysError(format("renaming ‘%1%’ to ‘%2%’") % tmp % path);
+    del.cancel();
+}
+
+bool LocalBinaryCacheStore::fileExists(const std::string & path)
+{
+    return pathExists(binaryCacheDir + "/" + path);
+}
+
+void LocalBinaryCacheStore::upsertFile(const std::string & path, const std::string & data)
+{
+    atomicWrite(binaryCacheDir + "/" + path, data);
+}
+
+std::string LocalBinaryCacheStore::getFile(const std::string & path)
+{
+    return readFile(binaryCacheDir + "/" + path);
+}
+
+}