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#include "archive.hh"
#include "fs-accessor.hh"
#include "store-api.hh"
#include "local-fs-store.hh"
#include "globals.hh"
#include "compression.hh"
#include "derivations.hh"
namespace nix {
LocalFSStore::LocalFSStore(const Params & params)
: Store(params)
{
}
struct LocalStoreAccessor : public FSAccessor
{
ref<LocalFSStore> store;
LocalStoreAccessor(ref<LocalFSStore> store) : store(store) { }
Path toRealPath(const Path & path, bool requireValidPath = true)
{
auto storePath = store->toStorePath(path).first;
if (requireValidPath && !store->isValidPath(storePath))
throw InvalidPath("path '%1%' does not exist in the store", store->printStorePath(storePath));
return store->getRealStoreDir() + std::string(path, store->storeDir.size());
}
FSAccessor::Stat stat(const Path & path) override
{
auto realPath = toRealPath(path);
struct stat st;
if (lstat(realPath.c_str(), &st)) {
if (errno == ENOENT || errno == ENOTDIR) return {Type::tMissing, 0, false};
throw SysError("getting status of '%1%'", path);
}
if (!S_ISREG(st.st_mode) && !S_ISDIR(st.st_mode) && !S_ISLNK(st.st_mode))
throw Error("file '%1%' has unsupported type", path);
return {
S_ISREG(st.st_mode) ? Type::tRegular :
S_ISLNK(st.st_mode) ? Type::tSymlink :
Type::tDirectory,
S_ISREG(st.st_mode) ? (uint64_t) st.st_size : 0,
S_ISREG(st.st_mode) && st.st_mode & S_IXUSR};
}
StringSet readDirectory(const Path & path) override
{
auto realPath = toRealPath(path);
auto entries = nix::readDirectory(realPath);
StringSet res;
for (auto & entry : entries)
res.insert(entry.name);
return res;
}
std::string readFile(const Path & path, bool requireValidPath = true) override
{
return nix::readFile(toRealPath(path, requireValidPath));
}
std::string readLink(const Path & path) override
{
return nix::readLink(toRealPath(path));
}
};
ref<FSAccessor> LocalFSStore::getFSAccessor()
{
return make_ref<LocalStoreAccessor>(ref<LocalFSStore>(
std::dynamic_pointer_cast<LocalFSStore>(shared_from_this())));
}
void LocalFSStore::narFromPath(const StorePath & path, Sink & sink)
{
if (!isValidPath(path))
throw Error("path '%s' does not exist in store", printStorePath(path));
dumpPath(getRealStoreDir() + std::string(printStorePath(path), storeDir.size()), sink);
}
const std::string LocalFSStore::drvsLogDir = "drvs";
std::optional<std::string> LocalFSStore::getBuildLogExact(const StorePath & path)
{
auto baseName = path.to_string();
for (int j = 0; j < 2; j++) {
Path logPath =
j == 0
? fmt("%s/%s/%s/%s", logDir, drvsLogDir, baseName.substr(0, 2), baseName.substr(2))
: fmt("%s/%s/%s", logDir, drvsLogDir, baseName);
Path logBz2Path = logPath + ".bz2";
if (pathExists(logPath))
return readFile(logPath);
else if (pathExists(logBz2Path)) {
try {
return decompress("bzip2", readFile(logBz2Path));
} catch (Error &) { }
}
}
return std::nullopt;
}
}
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