Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Cope with OSError when checking cache stat.mtime #11718

Merged
merged 1 commit into from
Dec 12, 2021
Merged

Cope with OSError when checking cache stat.mtime #11718

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
15 changes: 10 additions & 5 deletions mypy/build.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1311,8 +1311,11 @@ def validate_meta(meta: Optional[CacheMeta], id: str, path: Optional[str],
assert path is not None, "Internal error: meta was provided without a path"
if not manager.options.skip_cache_mtime_checks:
# Check data_json; assume if its mtime matches it's good.
# TODO: stat() errors
data_mtime = manager.getmtime(meta.data_json)
try:
data_mtime = manager.getmtime(meta.data_json)
except OSError:
manager.log('Metadata abandoned for {}: failed to stat data_json'.format(id))
return None
if data_mtime != meta.data_mtime:
manager.log('Metadata abandoned for {}: data cache is modified'.format(id))
return None
Expand Down Expand Up @@ -1508,9 +1511,6 @@ def write_cache(id: str, path: str, tree: MypyFile,
# Write data cache file, if applicable
# Note that for Bazel we don't record the data file's mtime.
if old_interface_hash == interface_hash:
# If the interface is unchanged, the cached data is guaranteed
# to be equivalent, and we only need to update the metadata.
data_mtime = manager.getmtime(data_json)
manager.trace("Interface for {} is unchanged".format(id))
else:
manager.trace("Interface for {} has changed".format(id))
Expand All @@ -1527,7 +1527,12 @@ def write_cache(id: str, path: str, tree: MypyFile,
# Both have the effect of slowing down the next run a
# little bit due to an out-of-date cache file.
return interface_hash, None

try:
data_mtime = manager.getmtime(data_json)
except OSError:
manager.log("Error in os.stat({!r}), skipping cache write".format(data_json))
return interface_hash, None

mtime = 0 if bazel else int(st.st_mtime)
size = st.st_size
Expand Down