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annotate mercurial/ignore.py @ 25166:7f53f305d4a6

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ignore: rename readignorefile to readpatternfile A future commit will move the readignorefile logic into match.py so it can be used from general match rules. Let's rename the function to represent this new behavior.
author Durham Goode <durham@fb.com>
date Sat, 16 May 2015 15:45:46 -0700
parents 581e2066d802
children 6f7048cc2419
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # ignore.py - ignored file handling for mercurial
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2 #
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3 # Copyright 2007 Matt Mackall <mpm@selenic.com>
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 from i18n import _
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9 import util, match
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10 import re
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11
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12 _commentre = None
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13
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14 def readpatternfile(filepath, warn):
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15 '''parse a pattern file, returning a list of
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16 patterns. These patterns should be given to compile()
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17 to be validated and converted into a match function.'''
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18 syntaxes = {'re': 'relre:', 'regexp': 'relre:', 'glob': 'relglob:'}
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19 syntax = 'relre:'
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20 patterns = []
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21
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22 fp = open(filepath)
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23 for line in fp:
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24 if "#" in line:
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25 global _commentre
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26 if not _commentre:
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27 _commentre = re.compile(r'((^|[^\\])(\\\\)*)#.*')
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28 # remove comments prefixed by an even number of escapes
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29 line = _commentre.sub(r'\1', line)
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30 # fixup properly escaped comments that survived the above
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31 line = line.replace("\\#", "#")
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32 line = line.rstrip()
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33 if not line:
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34 continue
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35
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36 if line.startswith('syntax:'):
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37 s = line[7:].strip()
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38 try:
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39 syntax = syntaxes[s]
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40 except KeyError:
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41 warn(_("%s: ignoring invalid syntax '%s'\n") % (filepath, s))
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42 continue
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43
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44 linesyntax = syntax
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45 for s, rels in syntaxes.iteritems():
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46 if line.startswith(rels):
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47 linesyntax = rels
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48 line = line[len(rels):]
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49 break
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50 elif line.startswith(s+':'):
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51 linesyntax = rels
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52 line = line[len(s) + 1:]
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53 break
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54 patterns.append(linesyntax + line)
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55
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56 fp.close()
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57 return patterns
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58
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59 def readpats(root, files, warn):
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60 '''return a dict mapping ignore-file-name to list-of-patterns'''
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61
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62 pats = {}
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63 for f in files:
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64 if f in pats:
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65 continue
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66 try:
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67 pats[f] = readpatternfile(f, warn)
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68 except IOError, inst:
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69 warn(_("skipping unreadable ignore file '%s': %s\n") %
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70 (f, inst.strerror))
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71
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72 return [(f, pats[f]) for f in files if f in pats]
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73
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74 def ignore(root, files, warn):
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75 '''return matcher covering patterns in 'files'.
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76
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77 the files parsed for patterns include:
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78 .hgignore in the repository root
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79 any additional files specified in the [ui] section of ~/.hgrc
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80
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81 trailing white space is dropped.
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82 the escape character is backslash.
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83 comments start with #.
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84 empty lines are skipped.
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85
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86 lines can be of the following formats:
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87
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88 syntax: regexp # defaults following lines to non-rooted regexps
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89 syntax: glob # defaults following lines to non-rooted globs
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90 re:pattern # non-rooted regular expression
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91 glob:pattern # non-rooted glob
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92 pattern # pattern of the current default type'''
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93
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94 pats = readpats(root, files, warn)
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95
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96 allpats = []
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97 for f, patlist in pats:
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98 allpats.extend(patlist)
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99 if not allpats:
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100 return util.never
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101
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102 try:
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103 ignorefunc = match.match(root, '', [], allpats)
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104 except util.Abort:
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105 # Re-raise an exception where the src is the right file
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106 for f, patlist in pats:
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107 try:
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108 match.match(root, '', [], patlist)
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109 except util.Abort, inst:
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110 raise util.Abort('%s: %s' % (f, inst[0]))
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111
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112 return ignorefunc