Mercurial > hg > check_whitespace

annotate check_whitespace.py @ 11:ff07accd0692

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Don't use print; complain when used as program instead of python hook.
author Sjoerd Mullender <sjoerd@acm.org>
date Fri, 20 Mar 2015 15:26:10 +0100 (2015-03-20)
parents bd1ca3d502d6
children 915cf73f6afa
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #!/usr/bin/env python
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2 #
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3 # Mercurial hook to check for inappropriate whitespace. Currently it
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4 # only checks Python files.
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5 #
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6 # This script is based on the code in the Mercurial book
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7 # <http://hgbook.red-bean.com/read/handling-repository-events-with-hooks.html#id403945>
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8
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9 '''hook to refuse commits that introduce some bad inputs.
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10 Inputs that are refused are conflict markers (rows of < or >
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11 characters), and tabs and trailing white space in Python sources.
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12
561cb4f73b83 Turn into proper hook function (with backward compatibility).
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13 Usage: in your ~/.hgrc file add:
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14 [hooks]
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15 pretxncommit.whitespace = python:/path/to/check_whitespace.py:hook
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16 pretxnchangegroup.whitespace = python:/path/to/check_whitespace.py:hook
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17 '''
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18
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19 import re
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20 import os
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21
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22 binary_suffixes = (
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23 '.bam',
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24 '.bmp',
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25 '.bz2',
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26 '.chm',
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27 '.cpl',
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28 '.dia',
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29 '.dll',
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30 '.gz',
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31 '.ico',
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32 '.pdf',
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33 '.png',
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34 '.rtf',
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35 '.zip',
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36 )
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37
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38 def trailing_whitespace(difflines):
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39 linenum = 0
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40 header = False
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41 filename = ''
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42 fnre = re.compile(r'(?:---|\+\+\+) (?P<filename>[^\t\r\n]+)')
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43 lnre = re.compile(r'@@ -\d+,\d+ \+(?P<lineno>\d+),')
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44 wsre = re.compile(r'\+.*[ \t]$')
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45 tbre = re.compile(r'\+.*\t')
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46 resre = re.compile(r'\+(<<<<<<<|>>>>>>>)')
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47 adding = False
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48 islink = False # symlinks can have no newline at end
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49
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50 for chunk in difflines:
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51 for line in chunk.split('\n'):
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52 if header:
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53 if line.startswith('new file mode'):
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54 islink = '120000' in line
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55 # remember the name of the file that this diff affects
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56 m = fnre.match(line)
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57 if m is not None and m.group('filename') != '/dev/null':
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58 filename = m.group('filename').split('/', 1)[-1]
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59 if line.startswith('+++ '):
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60 header = False
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61 continue
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62 if line.startswith('diff '):
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63 header = True
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64 adding = False
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65 islink = False
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66 continue
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67 # hunk header - save the line number
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68 m = lnre.match(line)
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69 if m is not None:
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70 linenum = int(m.group('lineno'))
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71 continue
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72 if header or not filename:
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73 continue
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74 if line[:1] == '+':
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75 adding = True
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76 elif line[:1] in (' ', '-'):
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77 adding = False
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78 elif adding \
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79 and not islink \
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80 and line.startswith(r'\ No newline at end of file') \
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81 and not filename.endswith('vertoo.data') \
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82 and not os.path.splitext(filename)[1] in binary_suffixes:
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83 adding = False
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84 yield filename, linenum, 'no newline at end of file'
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85 # hunk body - check for an added line with bad whitespace
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86 if filename[-3:] == '.py' or filename[-5:] == '.py.in':
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87 m = tbre.match(line)
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88 if m is not None:
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89 yield filename, linenum, 'TABs'
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90 # trailing whitespace, for now only in Python source
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91 m = wsre.match(line)
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92 if m is not None:
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93 if filename[-3:] == '.py' or filename[-5:] == '.py.in':
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94 yield filename, linenum, 'trailing whitespace'
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95 # conflict markers
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96 m = resre.match(line)
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97 if m is not None:
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98 yield filename, linenum, 'conflict marker'
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99 if line and line[0] in ' +':
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100 linenum += 1
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101
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102 def hook(ui, repo, hooktype, node=None, source=None, **kwargs):
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103 import os, sys, subprocess
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104 if hooktype not in ['pretxnchangegroup', 'pretxncommit']:
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105 ui.write('Hook should be pretxncommit/pretxnchangegroup not "%s".' % hooktype)
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106 return 1
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107 added = False
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108 branches = {}
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109 for rev in xrange(repo[node], len(repo)):
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110 branch = repo[rev].branch()
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111 if not branches.has_key(branch):
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112 # first time we see this branch, remember parents to diff against
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113 branches[branch] = repo[rev].parents()
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114 desc = 0
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115 for d in repo[rev].descendants():
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116 break
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117 else:
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118 # no descendants for this revision, check diff with saved parents
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119 for p in branches[branch]:
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120 for filename, linenum, msg in trailing_whitespace(repo[rev].diff(p)):
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121 ui.write('%s, line %d: %s added\n' % (filename, linenum, msg))
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122 added = True
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123 if added:
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124 # save the commit message so we don't need to retype it
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125 if source != 'serve':
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126 cmtsv = os.path.join('.hg','commit.save')
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127 subprocess.call(['hg', 'tip', '--template', '{desc}'],
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128 stdout=open(cmtsv, 'w'))
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129 ui.write('commit message saved to %s\n' % cmtsv)
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130 return 1
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131
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132 if __name__ == '__main__':
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133 import sys
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134 sys.stderr.write('call this hook using the Python interface.\n'
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135 'In your .hgrc file you shoud have:\n'
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136 'pretxncommit.whitespace = python:<path-to-check_whitespace-directory>/check_whitespace.py:hook\n')
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137
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138 sys.exit(1)