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Factor out nix::maybeLstat

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This function is nice for more than `PosixSourceAccessor`. We can make a
few things simpler with it.

Note that the error logic slightly changes in some of the call sites, in
that we also count `ENOTDIR` and not just `ENOENT` as not having the
file, but that should be fine.
This commit is contained in:
John Ericson 2024-03-29 15:21:10 -04:00
parent eeecbb9c36
commit 8be347afca
5 changed files with 36 additions and 37 deletions
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8
src/libutil/posix-source-accessor.cc
View file

@ -97,13 +97,7 @@ std::optional<struct stat> PosixSourceAccessor::cachedLstat(const CanonPath & pa
if (i != cache->end()) return i->second;
}
std::optional<struct stat> st{std::in_place};
if (::lstat(absPath.c_str(), &*st)) {
if (errno == ENOENT || errno == ENOTDIR)
st.reset();
else
throw SysError("getting status of '%s'", showPath(path));
}
auto st = nix::maybeLstat(absPath.c_str());
auto cache(_cache.lock());
if (cache->size() >= 16384) cache->clear();