[Python-checkins] gh-64595: Fix write file logic in Argument Clinic (#104507)
erlend-aasland
webhook-mailer at python.org
Tue May 16 06:26:03 EDT 2023
https://github.com/python/cpython/commit/cca90b690679ed62a689b7867e83776b15c8a5e8
commit: cca90b690679ed62a689b7867e83776b15c8a5e8
branch: main
author: Erlend E. Aasland <erlend.aasland at protonmail.com>
committer: erlend-aasland <erlend.aasland at protonmail.com>
date: 2023-05-16T12:25:43+02:00
summary:
gh-64595: Fix write file logic in Argument Clinic (#104507)
Check if any clinic output actually changes any of the output files
before deciding if we should touch the source file.
files:
M Tools/clinic/clinic.py
diff --git a/Tools/clinic/clinic.py b/Tools/clinic/clinic.py
index 4270fb3cc566..13fd66b0406f 100755
--- a/Tools/clinic/clinic.py
+++ b/Tools/clinic/clinic.py
@@ -1965,17 +1965,17 @@ def dump(self):
return_converters = {}
-def write_file(filename, new_contents, force=False):
+def file_changed(filename: str, new_contents: str) -> bool:
+ """Return true if file contents changed (meaning we must update it)"""
try:
with open(filename, 'r', encoding="utf-8") as fp:
old_contents = fp.read()
-
- if old_contents == new_contents and not force:
- # no change: avoid modifying the file modification time
- return
+ return old_contents != new_contents
except FileNotFoundError:
- pass
+ return True
+
+def write_file(filename: str, new_contents: str):
# Atomic write using a temporary file and os.replace()
filename_new = f"{filename}.new"
with open(filename_new, "w", encoding="utf-8") as fp:
@@ -2237,11 +2237,12 @@ def parse_file(filename, *, verify=True, output=None):
clinic = Clinic(language, verify=verify, filename=filename)
src_out, clinic_out = clinic.parse(raw)
- # If clinic output changed, force updating the source file as well.
- force = bool(clinic_out)
- write_file(output, src_out, force=force)
- for fn, data in clinic_out:
- write_file(fn, data)
+ changes = [(fn, data) for fn, data in clinic_out if file_changed(fn, data)]
+ if changes:
+ # Always (re)write the source file.
+ write_file(output, src_out)
+ for fn, data in clinic_out:
+ write_file(fn, data)
def compute_checksum(input, length=None):
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