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#include "fs-accessor.hh"
#include "store-api.hh"
namespace nix {
struct LocalStoreAccessor : public FSAccessor
{
ref<Store> store;
LocalStoreAccessor(ref<Store> store) : store(store) { }
void assertStore(const Path & path)
{
Path storePath = toStorePath(path);
if (!store->isValidPath(storePath))
throw Error(format("path ‘%1%’ is not a valid store path") % storePath);
}
FSAccessor::Stat stat(const Path & path) override
{
assertStore(path);
struct stat st;
if (lstat(path.c_str(), &st)) {
if (errno == ENOENT) return {Type::tMissing, 0, false};
throw SysError(format("getting status of ‘%1%’") % path);
}
if (!S_ISREG(st.st_mode) && !S_ISDIR(st.st_mode) && !S_ISLNK(st.st_mode))
throw Error(format("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
{
assertStore(path);
auto entries = nix::readDirectory(path);
StringSet res;
for (auto & entry : entries)
res.insert(entry.name);
return res;
}
std::string readFile(const Path & path) override
{
assertStore(path);
return nix::readFile(path);
}
std::string readLink(const Path & path) override
{
assertStore(path);
return nix::readLink(path);
}
};
ref<FSAccessor> LocalFSStore::getFSAccessor()
{
return make_ref<LocalStoreAccessor>(ref<Store>(shared_from_this()));
}
}
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