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comparison mercurial/util.py @ 18775:5b05ceb24a8d

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util: add flag support to compilere
author Bryan O'Sullivan <bryano@fb.com>
date Mon, 11 Mar 2013 12:06:13 -0700
parents 9baf4330d88f
children cafa447a7d3b
comparison
equal deleted inserted replaced
18766:64b5562550e2 18775:5b05ceb24a8d
660 import re2 660 import re2
661 _re2 = None 661 _re2 = None
662 except ImportError: 662 except ImportError:
663 _re2 = False 663 _re2 = False
664 664
665 def compilere(pat): 665 def compilere(pat, flags=0):
666 '''Compile a regular expression, using re2 if possible 666 '''Compile a regular expression, using re2 if possible
667 667
668 For best performance, use only re2-compatible regexp features.''' 668 For best performance, use only re2-compatible regexp features. The
669 only flags from the re module that are re2-compatible are
670 IGNORECASE and MULTILINE.'''
669 global _re2 671 global _re2
670 if _re2 is None: 672 if _re2 is None:
671 try: 673 try:
672 re2.compile 674 re2.compile
673 _re2 = True 675 _re2 = True
674 except ImportError: 676 except ImportError:
675 _re2 = False 677 _re2 = False
676 if _re2: 678 if _re2 and (flags & ~(re.IGNORECASE | re.MULTILINE)) == 0:
679 if flags & re.IGNORECASE:
680 pat = '(?i)' + pat
681 if flags & re.MULTILINE:
682 pat = '(?m)' + pat
677 try: 683 try:
678 return re2.compile(pat) 684 return re2.compile(pat)
679 except re2.error: 685 except re2.error:
680 pass 686 pass
681 return re.compile(pat) 687 return re.compile(pat, flags)
682 688
683 _fspathcache = {} 689 _fspathcache = {}
684 def fspath(name, root): 690 def fspath(name, root):
685 '''Get name in the case stored in the filesystem 691 '''Get name in the case stored in the filesystem
686 692