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comparison mercurial/util.py @ 812:b65af904d6d7

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Reduce the amount of stat traffic generated by a walk. When we switched to the new walk code for commands, we no longer passed a list of specific files to the repo or dirstate walk or changes methods. This meant that we always walked and attempted to match everything, which was not efficient. Now, if we are given any patterns to match, or nothing at all, we still walk everything. But if we are given only file names that contain no glob characters, we only walk those.
author Bryan O'Sullivan <bos@serpentine.com>
date Fri, 29 Jul 2005 12:30:12 -0800
parents cdb9e95b2fab
children 0902ffece4b4
comparison
equal deleted inserted replaced
811:fa9aaf3bbdd7 812:b65af904d6d7
64 res += '|' 64 res += '|'
65 else: 65 else:
66 res += re.escape(c) 66 res += re.escape(c)
67 return head + res + tail 67 return head + res + tail
68 68
69 def matcher(cwd, pats, inc, exc, head = ''): 69 _globchars = {'[': 1, '{': 1, '*': 1, '?': 1}
70
71 def matcher(cwd, names, inc, exc, head = ''):
72 def patlike(name):
73 for prefix in 're:', 'glob:', 'path:':
74 if name.startswith(prefix): return True
75 for c in name:
76 if c in _globchars: return True
77
70 def regex(name, tail): 78 def regex(name, tail):
71 '''convert a pattern into a regular expression''' 79 '''convert a pattern into a regular expression'''
72 if name.startswith('re:'): 80 if name.startswith('re:'):
73 return name[3:] 81 return name[3:]
74 elif name.startswith('path:'): 82 elif name.startswith('path:'):
75 return '^' + re.escape(name[5:]) + '$' 83 return '^' + re.escape(name[5:]) + '$'
76 elif name.startswith('glob:'): 84 elif name.startswith('glob:'):
77 return head + globre(name[5:], '', tail) 85 return head + globre(name[5:], '', tail)
78 return head + globre(name, '', tail) 86 return head + globre(name, '', tail)
79 87
88 cwdsep = cwd + os.sep
89
80 def under(fn): 90 def under(fn):
81 """check if fn is under our cwd""" 91 """check if fn is under our cwd"""
82 return not cwd or fn.startswith(cwdsep) 92 return not cwd or fn.startswith(cwdsep)
83 93
84 def matchfn(pats, tail): 94 def matchfn(pats, tail):
85 """build a matching function from a set of patterns""" 95 """build a matching function from a set of patterns"""
86 if pats: 96 if pats:
87 pat = '(?:%s)' % '|'.join([regex(p, tail) for p in pats]) 97 pat = '(?:%s)' % '|'.join([regex(p, tail) for p in pats])
88 if cwd: 98 if cwd:
89 pat = re.escape(cwd + os.sep) + pat 99 pat = re.escape(cwdsep) + pat
90 return re.compile(pat).match 100 return re.compile(pat).match
91 101
92 cwdsep = cwd + os.sep 102 pats = filter(patlike, names)
93 patmatch = matchfn(pats, '$') or (lambda fn: True) 103 files = [n for n in names if not patlike(n)]
104 if pats: plain = []
105 elif cwd: plain = [cwdsep + f for f in files]
106 else: plain = files
107
108 patmatch = matchfn(pats, '$')
109 filematch = matchfn(files, '(?:/|$)')
94 incmatch = matchfn(inc, '(?:/|$)') or under 110 incmatch = matchfn(inc, '(?:/|$)') or under
95 excmatch = matchfn(exc, '(?:/|$)') or (lambda fn: False) 111 excmatch = matchfn(exc, '(?:/|$)') or (lambda fn: False)
96 112
97 return lambda fn: (incmatch(fn) and not excmatch(fn) and 113 return plain, lambda fn: (incmatch(fn) and not excmatch(fn) and
98 (fn.endswith('/') or patmatch(fn))) 114 (fn.endswith('/') or
115 (not pats and not files) or
116 (pats and patmatch(fn)) or
117 (files and filematch(fn))))
99 118
100 def system(cmd, errprefix=None): 119 def system(cmd, errprefix=None):
101 """execute a shell command that must succeed""" 120 """execute a shell command that must succeed"""
102 rc = os.system(cmd) 121 rc = os.system(cmd)
103 if rc: 122 if rc: