wrap-commit-msg.py (2233B)
1 #!/usr/bin/env python3 2 ## 3 ## Copyright (c) 2016, Alliance for Open Media. All rights reserved. 4 ## 5 ## This source code is subject to the terms of the BSD 2 Clause License and 6 ## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License 7 ## was not distributed with this source code in the LICENSE file, you can 8 ## obtain it at www.aomedia.org/license/software. If the Alliance for Open 9 ## Media Patent License 1.0 was not distributed with this source code in the 10 ## PATENTS file, you can obtain it at www.aomedia.org/license/patent. 11 ## 12 """Wraps paragraphs of text, preserving manual formatting 13 14 This is like fold(1), but has the special convention of not modifying lines 15 that start with whitespace. This allows you to intersperse blocks with 16 special formatting, like code blocks, with written prose. The prose will 17 be wordwrapped, and the manual formatting will be preserved. 18 19 * This won't handle the case of a bulleted (or ordered) list specially, so 20 manual wrapping must be done. 21 22 Occasionally it's useful to put something with explicit formatting that 23 doesn't look at all like a block of text inline. 24 25 indicator = has_leading_whitespace(line); 26 if (indicator) 27 preserve_formatting(line); 28 29 The intent is that this docstring would make it through the transform 30 and still be legible and presented as it is in the source. If additional 31 cases are handled, update this doc to describe the effect. 32 """ 33 34 __author__ = "jkoleszar@google.com" 35 import textwrap 36 import sys 37 38 def wrap(text): 39 if text: 40 return textwrap.fill(text, break_long_words=False) + '\n' 41 return "" 42 43 44 def main(fileobj): 45 text = "" 46 output = "" 47 while True: 48 line = fileobj.readline() 49 if not line: 50 break 51 52 if line.lstrip() == line: 53 text += line 54 else: 55 output += wrap(text) 56 text="" 57 output += line 58 output += wrap(text) 59 60 # Replace the file or write to stdout. 61 if fileobj == sys.stdin: 62 fileobj = sys.stdout 63 else: 64 fileobj.seek(0) 65 fileobj.truncate(0) 66 fileobj.write(output) 67 68 if __name__ == "__main__": 69 if len(sys.argv) > 1: 70 main(open(sys.argv[1], "r+")) 71 else: 72 main(sys.stdin)