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