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annotate mercurial/ignore.py @ 7305:c21d236ca897

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hgweb: descend empty directories in web view When a manifest has a series of directories with nothing in them but a single directory, displaying the entire chain of empty directories allows for navigation down to the first non-empty directory with a single click. Because Java links package hierarchy to directory hierarchy, and because Java conventions include at least three empty directories at the top of this hierarchy, descending down empty directories is very common in Java web tools.
author Ry4an Brase <ry4an-hg@ry4an.org>
date Mon, 03 Nov 2008 10:20:28 +0100
parents 04c76f296ad6
children 4dd7b28003d2
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
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6 # of the GNU General Public License, incorporated herein by reference.
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7
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8 from i18n import _
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9 import util, re
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10
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11 _commentre = None
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12
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13 def _parselines(fp):
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14 for line in fp:
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15 if "#" in line:
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16 global _commentre
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17 if not _commentre:
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18 _commentre = re.compile(r'((^|[^\\])(\\\\)*)#.*')
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19 # remove comments prefixed by an even number of escapes
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20 line = _commentre.sub(r'\1', line)
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21 # fixup properly escaped comments that survived the above
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22 line = line.replace("\\#", "#")
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23 line = line.rstrip()
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24 if line:
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25 yield line
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26
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27 def ignore(root, files, warn):
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28 '''return the contents of .hgignore files as a list of patterns.
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29
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30 the files parsed for patterns include:
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31 .hgignore in the repository root
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32 any additional files specified in the [ui] section of ~/.hgrc
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33
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34 trailing white space is dropped.
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35 the escape character is backslash.
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36 comments start with #.
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37 empty lines are skipped.
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38
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39 lines can be of the following formats:
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40
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41 syntax: regexp # defaults following lines to non-rooted regexps
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42 syntax: glob # defaults following lines to non-rooted globs
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43 re:pattern # non-rooted regular expression
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44 glob:pattern # non-rooted glob
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45 pattern # pattern of the current default type'''
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46
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47 syntaxes = {'re': 'relre:', 'regexp': 'relre:', 'glob': 'relglob:'}
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48 pats = {}
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49 for f in files:
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50 try:
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51 pats[f] = []
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52 fp = open(f)
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53 syntax = 'relre:'
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54 for line in _parselines(fp):
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55 if line.startswith('syntax:'):
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56 s = line[7:].strip()
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57 try:
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58 syntax = syntaxes[s]
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59 except KeyError:
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60 warn(_("%s: ignoring invalid syntax '%s'\n") % (f, s))
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61 continue
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62 pat = syntax + line
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63 for s, rels in syntaxes.items():
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64 if line.startswith(rels):
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65 pat = line
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66 break
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67 elif line.startswith(s+':'):
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68 pat = rels + line[len(s)+1:]
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69 break
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70 pats[f].append(pat)
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71 except IOError, inst:
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72 if f != files[0]:
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73 warn(_("skipping unreadable ignore file '%s': %s\n") %
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74 (f, inst.strerror))
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75
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76 allpats = []
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77 [allpats.extend(patlist) for patlist in pats.values()]
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78 if not allpats:
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79 return util.never
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80
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81 try:
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82 files, ignorefunc, anypats = (
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83 util.matcher(root, inc=allpats, src='.hgignore'))
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84 except util.Abort:
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85 # Re-raise an exception where the src is the right file
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86 for f, patlist in pats.items():
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87 files, ignorefunc, anypats = (
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88 util.matcher(root, inc=patlist, src=f))
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89
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90 return ignorefunc