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LocalStoreAccessor: Reuse PosixSourceAccessor

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This commit is contained in:
Eelco Dolstra 2023-11-01 17:22:25 +01:00
parent 1a902f5fa7
commit 2f5c1a27dc
2 changed files with 15 additions and 36 deletions
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48
src/libstore/local-fs-store.cc
View file

@ -1,5 +1,5 @@
#include "archive.hh"
#include "source-accessor.hh"
#include "posix-source-accessor.hh"
#include "store-api.hh"
#include "local-fs-store.hh"
#include "globals.hh"
@ -13,7 +13,7 @@ LocalFSStore::LocalFSStore(const Params & params)
{
}
struct LocalStoreAccessor : public SourceAccessor
struct LocalStoreAccessor : PosixSourceAccessor
{
ref<LocalFSStore> store;
bool requireValidPath;
@ -23,57 +23,35 @@ struct LocalStoreAccessor : public SourceAccessor
, requireValidPath(requireValidPath)
{ }
Path toRealPath(const CanonPath & path)
CanonPath toRealPath(const CanonPath & path)
{
auto storePath = store->toStorePath(path.abs()).first;
auto [storePath, rest] = store->toStorePath(path.abs());
if (requireValidPath && !store->isValidPath(storePath))
throw InvalidPath("path '%1%' is not a valid store path", store->printStorePath(storePath));
return store->getRealStoreDir() + path.abs().substr(store->storeDir.size());
return CanonPath(store->getRealStoreDir()) + storePath.to_string() + CanonPath(rest);
}
std::optional<Stat> maybeLstat(const CanonPath & path) override
{
auto realPath = toRealPath(path);
// FIXME: use PosixSourceAccessor.
struct stat st;
if (::lstat(realPath.c_str(), &st)) {
if (errno == ENOENT || errno == ENOTDIR) return std::nullopt;
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}};
return PosixSourceAccessor::maybeLstat(toRealPath(path));
}
DirEntries readDirectory(const CanonPath & path) override
{
auto realPath = toRealPath(path);
auto entries = nix::readDirectory(realPath);
DirEntries res;
for (auto & entry : entries)
res.insert_or_assign(entry.name, std::nullopt);
return res;
return PosixSourceAccessor::readDirectory(toRealPath(path));
}
std::string readFile(const CanonPath & path) override
void readFile(
const CanonPath & path,
Sink & sink,
std::function<void(uint64_t)> sizeCallback) override
{
return nix::readFile(toRealPath(path));
return PosixSourceAccessor::readFile(toRealPath(path), sink, sizeCallback);
}
std::string readLink(const CanonPath & path) override
{
return nix::readLink(toRealPath(path));
return PosixSourceAccessor::readLink(toRealPath(path));
}
};

3
src/libutil/posix-source-accessor.cc
View file

@ -58,7 +58,8 @@ std::optional<SourceAccessor::Stat> PosixSourceAccessor::maybeLstat(const CanonP
S_ISDIR(st.st_mode) ? tDirectory :
S_ISLNK(st.st_mode) ? tSymlink :
tMisc,
.isExecutable = S_ISREG(st.st_mode) && st.st_mode & S_IXUSR
.fileSize = S_ISREG(st.st_mode) ? std::optional<uint64_t>(st.st_size) : std::nullopt,
.isExecutable = S_ISREG(st.st_mode) && st.st_mode & S_IXUSR,
};
}