mirror of
https://github.com/pre-commit/pre-commit-hooks.git
synced 2025-08-14 09:27:21 +08:00
83 lines
2.9 KiB
Python
83 lines
2.9 KiB
Python
from __future__ import print_function
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import argparse
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import os
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import sys
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import tempfile
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from pre_commit_hooks.util import cmd_output
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def _fix_file(filename, markdown=False):
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with tempfile.NamedTemporaryFile(delete=False) as tmp_file:
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with open(filename, 'rb') as original_file:
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for line in original_file.readlines():
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# preserve trailing two-space for non-blank lines in markdown files
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if markdown and (not line.isspace()) and line.endswith(b' \n'):
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line = line.rstrip(b' \n') # restricted stripping: e.g. \t are not stripped
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# only preserve if there are no trailing tabs or unusual whitespace
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if not line[-1:].isspace():
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tmp_file.write(line + b' \n')
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else:
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tmp_file.write(line.rstrip() + b'\n')
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else:
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tmp_file.write(line.rstrip() + b'\n')
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os.remove(filename)
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os.rename(tmp_file.name, filename)
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def fix_trailing_whitespace(argv=None):
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parser = argparse.ArgumentParser()
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parser.add_argument(
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'--no-markdown-linebreak-ext',
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action='store_const',
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const=[],
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default=argparse.SUPPRESS,
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dest='markdown_linebreak_ext',
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help='Do not preserve linebreak spaces in Markdown'
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)
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parser.add_argument(
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'--markdown-linebreak-ext',
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action='append',
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const='',
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default=['md,markdown'],
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metavar='*|EXT[,EXT,...]',
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nargs='?',
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help='Markdown extensions (or *) for linebreak spaces'
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)
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parser.add_argument('filenames', nargs='*', help='Filenames to fix')
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args = parser.parse_args(argv)
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bad_whitespace_files = cmd_output(
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'grep', '-l', '[[:space:]]$', *args.filenames, retcode=None
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).strip().splitlines()
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md_args = args.markdown_linebreak_ext
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if '' in md_args:
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parser.error('--markdown-linebreak-ext requires a non-empty argument')
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all_markdown = '*' in md_args
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# normalize all extensions; split at ',', lowercase, and force 1 leading '.'
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md_exts = ['.' + x.lower().lstrip('.')
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for x in ','.join(md_args).split(',')]
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# reject probable "eaten" filename as extension (skip leading '.' with [1:])
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for ext in md_exts:
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if any(c in ext[1:] for c in r'./\:'):
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parser.error(
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"bad --markdown-linebreak-ext extension '{0}' (has . / \\ :)\n"
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" (probably filename; use '--markdown-linebreak-ext=EXT')"
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.format(ext)
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)
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return_code = 0
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for bad_whitespace_file in bad_whitespace_files:
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print('Fixing {0}'.format(bad_whitespace_file))
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_, extension = os.path.splitext(bad_whitespace_file.lower())
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_fix_file(bad_whitespace_file, all_markdown or extension in md_exts)
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return_code = 1
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return return_code
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if __name__ == '__main__':
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sys.exit(fix_trailing_whitespace())
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