forked from lix-project/lix
80 lines
2 KiB
C++
80 lines
2 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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namespace nix {
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struct LocalStoreAccessor : public FSAccessor
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{
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ref<Store> store;
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LocalStoreAccessor(ref<Store> store) : store(store) { }
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void assertStore(const Path & path)
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{
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Path storePath = toStorePath(path);
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if (!store->isValidPath(storePath))
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throw Error(format("path ‘%1%’ is not a valid store path") % storePath);
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}
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FSAccessor::Stat stat(const Path & path) override
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{
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assertStore(path);
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struct stat st;
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if (lstat(path.c_str(), &st)) {
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if (errno == ENOENT || errno == ENOTDIR) return {Type::tMissing, 0, false};
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throw SysError(format("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(format("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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assertStore(path);
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auto entries = nix::readDirectory(path);
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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) override
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{
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assertStore(path);
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return nix::readFile(path);
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}
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std::string readLink(const Path & path) override
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{
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assertStore(path);
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return nix::readLink(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<Store>(shared_from_this()));
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}
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void LocalFSStore::narFromPath(const Path & path, Sink & sink)
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{
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if (!isValidPath(path))
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throw Error(format("path ‘%s’ is not valid") % path);
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dumpPath(path, sink);
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}
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}
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