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bpo-45231: update_file.py preserves end of line (GH-28411)

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The update_file.py tool now preserves the end of line of the updated
file. Fix the "make regen-frozen" command: it no longer changes the
end of line of PCbuild/ files on Unix. Git changes the end of line
depending on the platform.
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Victor Stinner 2021-09-17 20:12:25 +02:00 committed by GitHub
parent 778b07565e
commit c5a677da9e
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1 changed files with 13 additions and 1 deletions
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14
Tools/scripts/update_file.py
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@ -28,7 +28,19 @@ def updating_file_with_tmpfile(filename, tmpfile=None):
elif os.path.isdir(tmpfile):
tmpfile = os.path.join(tmpfile, filename + '.tmp')
with open(tmpfile, 'w') as outfile:
with open(filename, 'rb') as infile:
line = infile.readline()
if line.endswith(b'\r\n'):
newline = "\r\n"
elif line.endswith(b'\r'):
newline = "\r"
elif line.endswith(b'\n'):
newline = "\n"
else:
raise ValueError(f"unknown end of line: {filename}: {line!a}")
with open(tmpfile, 'w', newline=newline) as outfile:
with open(filename) as infile:
yield infile, outfile
update_file_with_tmpfile(filename, tmpfile)