forked from lix-project/lix
100 lines
2.4 KiB
C++
100 lines
2.4 KiB
C++
#include "binary-cache-store.hh"
|
||
#include "globals.hh"
|
||
|
||
namespace nix {
|
||
|
||
class LocalBinaryCacheStore : public BinaryCacheStore
|
||
{
|
||
private:
|
||
|
||
Path binaryCacheDir;
|
||
|
||
public:
|
||
|
||
LocalBinaryCacheStore(std::shared_ptr<Store> localStore,
|
||
const StoreParams & params, const Path & binaryCacheDir)
|
||
: BinaryCacheStore(localStore, params)
|
||
, binaryCacheDir(binaryCacheDir)
|
||
{
|
||
}
|
||
|
||
void init() override;
|
||
|
||
std::string getUri() override
|
||
{
|
||
return "file://" + binaryCacheDir;
|
||
}
|
||
|
||
protected:
|
||
|
||
bool fileExists(const std::string & path) override;
|
||
|
||
void upsertFile(const std::string & path, const std::string & data) override;
|
||
|
||
std::shared_ptr<std::string> getFile(const std::string & path) override;
|
||
|
||
PathSet queryAllValidPaths() override
|
||
{
|
||
PathSet paths;
|
||
|
||
for (auto & entry : readDirectory(binaryCacheDir)) {
|
||
if (entry.name.size() != 40 ||
|
||
!hasSuffix(entry.name, ".narinfo"))
|
||
continue;
|
||
paths.insert(settings.nixStore + "/" + entry.name.substr(0, entry.name.size() - 8));
|
||
}
|
||
|
||
return paths;
|
||
}
|
||
|
||
};
|
||
|
||
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::shared_ptr<std::string> LocalBinaryCacheStore::getFile(const std::string & path)
|
||
{
|
||
try {
|
||
return std::make_shared<std::string>(readFile(binaryCacheDir + "/" + path));
|
||
} catch (SysError & e) {
|
||
if (e.errNo == ENOENT) return 0;
|
||
throw;
|
||
}
|
||
}
|
||
|
||
static RegisterStoreImplementation regStore([](
|
||
const std::string & uri, const StoreParams & params)
|
||
-> std::shared_ptr<Store>
|
||
{
|
||
if (std::string(uri, 0, 7) != "file://") return 0;
|
||
auto store = std::make_shared<LocalBinaryCacheStore>(
|
||
std::shared_ptr<Store>(0), params, std::string(uri, 7));
|
||
store->init();
|
||
return store;
|
||
});
|
||
|
||
}
|