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# ignore.py - ignored file handling for mercurial
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#
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# Copyright 2007 Matt Mackall <mpm@selenic.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from i18n import _
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import util, match
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import re
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_commentre = None
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def ignorepats(lines):
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'''parse lines (iterable) of .hgignore text, returning a tuple of
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(patterns, parse errors). These patterns should be given to compile()
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to be validated and converted into a match function.'''
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syntaxes = {'re': 'relre:', 'regexp': 'relre:', 'glob': 'relglob:'}
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syntax = 'relre:'
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patterns = []
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warnings = []
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for line in lines:
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if "#" in line:
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global _commentre
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if not _commentre:
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_commentre = re.compile(r'((^|[^\\])(\\\\)*)#.*')
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# remove comments prefixed by an even number of escapes
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line = _commentre.sub(r'\1', line)
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# fixup properly escaped comments that survived the above
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line = line.replace("\\#", "#")
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line = line.rstrip()
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if not line:
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continue
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if line.startswith('syntax:'):
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s = line[7:].strip()
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try:
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syntax = syntaxes[s]
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except KeyError:
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warnings.append(_("ignoring invalid syntax '%s'") % s)
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continue
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pat = syntax + line
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for s, rels in syntaxes.iteritems():
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if line.startswith(rels):
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pat = line
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break
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elif line.startswith(s+':'):
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pat = rels + line[len(s)+1:]
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break
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patterns.append(pat)
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return patterns, warnings
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def ignore(root, files, warn):
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'''return matcher covering patterns in 'files'.
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the files parsed for patterns include:
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.hgignore in the repository root
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any additional files specified in the [ui] section of ~/.hgrc
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trailing white space is dropped.
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the escape character is backslash.
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comments start with #.
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empty lines are skipped.
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lines can be of the following formats:
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syntax: regexp # defaults following lines to non-rooted regexps
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syntax: glob # defaults following lines to non-rooted globs
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re:pattern # non-rooted regular expression
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glob:pattern # non-rooted glob
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pattern # pattern of the current default type'''
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pats = {}
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for f in files:
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try:
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pats[f] = []
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fp = open(f)
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pats[f], warnings = ignorepats(fp)
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fp.close()
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for warning in warnings:
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warn("%s: %s\n" % (f, warning))
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except IOError, inst:
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if f != files[0]:
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warn(_("skipping unreadable ignore file '%s': %s\n") %
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(f, inst.strerror))
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allpats = []
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for patlist in pats.values():
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allpats.extend(patlist)
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if not allpats:
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return util.never
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try:
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ignorefunc = match.match(root, '', [], allpats)
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except util.Abort:
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# Re-raise an exception where the src is the right file
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for f, patlist in pats.iteritems():
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try:
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match.match(root, '', [], patlist)
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except util.Abort, inst:
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raise util.Abort('%s: %s' % (f, inst[0]))
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return ignorefunc
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