Mercurial > hg > mercurial-crew-with-dirclash

annotate mercurial/util.py @ 885:6594ba2a0f51

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Merge latest round of walk fixes.
author Bryan O'Sullivan <bos@serpentine.com>
date Fri, 12 Aug 2005 11:18:41 -0800
parents 781266a78fe1 087771ebe2e6
children 882756761433
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1 # util.py - utility functions and platform specfic implementations
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2 #
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3 # Copyright 2005 K. Thananchayan <thananck@yahoo.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
704
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8 import os, errno
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9 from demandload import *
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10 demandload(globals(), "re")
419
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11
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12 def unique(g):
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13 seen = {}
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14 for f in g:
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15 if f not in seen:
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16 seen[f] = 1
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17 yield f
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18
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19 class Abort(Exception):
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20 """Raised if a command needs to print an error and exit."""
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21
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22 def always(fn): return True
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23 def never(fn): return False
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24
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25 def globre(pat, head = '^', tail = '$'):
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26 "convert a glob pattern into a regexp"
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27 i, n = 0, len(pat)
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28 res = ''
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29 group = False
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30 def peek(): return i < n and pat[i]
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31 while i < n:
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32 c = pat[i]
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33 i = i+1
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34 if c == '*':
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35 if peek() == '*':
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36 i += 1
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37 res += '.*'
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38 else:
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39 res += '[^/]*'
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40 elif c == '?':
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41 res += '.'
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42 elif c == '[':
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43 j = i
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44 if j < n and pat[j] in '!]':
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45 j += 1
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46 while j < n and pat[j] != ']':
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47 j += 1
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48 if j >= n:
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49 res += '\\['
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50 else:
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51 stuff = pat[i:j].replace('\\','\\\\')
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52 i = j + 1
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53 if stuff[0] == '!':
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54 stuff = '^' + stuff[1:]
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55 elif stuff[0] == '^':
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56 stuff = '\\' + stuff
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57 res = '%s[%s]' % (res, stuff)
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58 elif c == '{':
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59 group = True
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60 res += '(?:'
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61 elif c == '}' and group:
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62 res += ')'
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63 group = False
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64 elif c == ',' and group:
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65 res += '|'
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66 else:
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67 res += re.escape(c)
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68 return head + res + tail
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69
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70 _globchars = {'[': 1, '{': 1, '*': 1, '?': 1}
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71
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72 def pathto(n1, n2):
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73 '''return the relative path from one place to another'''
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74 if not n1: return n2
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75 a, b = n1.split(os.sep), n2.split(os.sep)
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76 a.reverse(), b.reverse()
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77 while a and b and a[-1] == b[-1]:
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78 a.pop(), b.pop()
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79 b.reverse()
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80 return os.sep.join((['..'] * len(a)) + b)
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81
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82 def canonpath(repo, cwd, myname):
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83 rootsep = repo.root + os.sep
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84 name = myname
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85 if not name.startswith(os.sep):
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86 name = os.path.join(repo.root, cwd, name)
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87 name = os.path.normpath(name)
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88 if name.startswith(rootsep):
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89 return name[len(rootsep):]
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90 elif name == repo.root:
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91 return ''
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92 else:
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93 raise Abort('%s not under repository root' % myname)
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94
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95 def matcher(repo, cwd, names, inc, exc, head = ''):
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96 def patkind(name):
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97 for prefix in 're:', 'glob:', 'path:':
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98 if name.startswith(prefix): return name.split(':', 1)
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99 for c in name:
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100 if c in _globchars: return 'glob', name
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101 return 'relpath', name
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102
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103 def regex(name, tail):
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104 '''convert a pattern into a regular expression'''
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105 kind, name = patkind(name)
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106 if kind == 're':
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107 return name
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108 elif kind == 'path':
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109 return '^' + re.escape(name) + '$'
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110 return head + globre(name, '', tail)
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111
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112 def matchfn(pats, tail):
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113 """build a matching function from a set of patterns"""
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114 if pats:
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115 pat = '(?:%s)' % '|'.join([regex(p, tail) for p in pats])
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116 return re.compile(pat).match
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117
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118 def globprefix(pat):
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119 '''return the non-glob prefix of a path, e.g. foo/* -> foo'''
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120 root = []
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121 for p in pat.split(os.sep):
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122 if patkind(p)[0] == 'glob': break
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123 root.append(p)
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124 return os.sep.join(root)
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125
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126 pats = []
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127 files = []
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128 roots = []
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129 for kind, name in map(patkind, names):
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130 if kind in ('glob', 'relpath'):
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131 name = canonpath(repo, cwd, name)
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132 if name == '':
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133 kind, name = 'glob', '**'
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134 if kind in ('glob', 're'):
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135 pats.append(name)
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136 if kind == 'glob':
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Bryan O'Sullivan <bos@serpentine.com>
parents: 869
diff changeset
137 root = globprefix(name)
a82eae840447 Teach walk code about absolute paths.
Bryan O'Sullivan <bos@serpentine.com>
parents: 869
diff changeset
138 if root: roots.append(root)
a82eae840447 Teach walk code about absolute paths.
Bryan O'Sullivan <bos@serpentine.com>
parents: 869
diff changeset
139 elif kind == 'relpath':
a82eae840447 Teach walk code about absolute paths.
Bryan O'Sullivan <bos@serpentine.com>
parents: 869
diff changeset
140 files.append(name)
a82eae840447 Teach walk code about absolute paths.
Bryan O'Sullivan <bos@serpentine.com>
parents: 869
diff changeset
141 roots.append(name)
812
b65af904d6d7 Reduce the amount of stat traffic generated by a walk.
Bryan O'Sullivan <bos@serpentine.com>
parents: 782
diff changeset
142
820
89985a1b3427 Clean up walk and changes code to use normalised names properly.
Bryan O'Sullivan <bos@serpentine.com>
parents: 814
diff changeset
143 patmatch = matchfn(pats, '$') or always
89985a1b3427 Clean up walk and changes code to use normalised names properly.
Bryan O'Sullivan <bos@serpentine.com>
parents: 814
diff changeset
144 filematch = matchfn(files, '(?:/|$)') or always
89985a1b3427 Clean up walk and changes code to use normalised names properly.
Bryan O'Sullivan <bos@serpentine.com>
parents: 814
diff changeset
145 incmatch = matchfn(inc, '(?:/|$)') or always
742
092937de2ad7 Refactor matchpats and walk
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parents: 740
diff changeset
146 excmatch = matchfn(exc, '(?:/|$)') or (lambda fn: False)
092937de2ad7 Refactor matchpats and walk
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parents: 740
diff changeset
147
820
89985a1b3427 Clean up walk and changes code to use normalised names properly.
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parents: 814
diff changeset
148 return roots, lambda fn: (incmatch(fn) and not excmatch(fn) and
812
b65af904d6d7 Reduce the amount of stat traffic generated by a walk.
Bryan O'Sullivan <bos@serpentine.com>
parents: 782
diff changeset
149 (fn.endswith('/') or
b65af904d6d7 Reduce the amount of stat traffic generated by a walk.
Bryan O'Sullivan <bos@serpentine.com>
parents: 782
diff changeset
150 (not pats and not files) or
b65af904d6d7 Reduce the amount of stat traffic generated by a walk.
Bryan O'Sullivan <bos@serpentine.com>
parents: 782
diff changeset
151 (pats and patmatch(fn)) or
b65af904d6d7 Reduce the amount of stat traffic generated by a walk.
Bryan O'Sullivan <bos@serpentine.com>
parents: 782
diff changeset
152 (files and filematch(fn))))
742
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parents: 740
diff changeset
153
521
0fb8ade0f756 [PATCH] Fix use of util.CommandError
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parents: 515
diff changeset
154 def system(cmd, errprefix=None):
508
42a660abaf75 [PATCH] Harden os.system
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parents: 464
diff changeset
155 """execute a shell command that must succeed"""
42a660abaf75 [PATCH] Harden os.system
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parents: 464
diff changeset
156 rc = os.system(cmd)
42a660abaf75 [PATCH] Harden os.system
mpm@selenic.com
parents: 464
diff changeset
157 if rc:
521
0fb8ade0f756 [PATCH] Fix use of util.CommandError
mpm@selenic.com
parents: 515
diff changeset
158 errmsg = "%s %s" % (os.path.basename(cmd.split(None, 1)[0]),
0fb8ade0f756 [PATCH] Fix use of util.CommandError
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parents: 515
diff changeset
159 explain_exit(rc)[0])
0fb8ade0f756 [PATCH] Fix use of util.CommandError
mpm@selenic.com
parents: 515
diff changeset
160 if errprefix:
0fb8ade0f756 [PATCH] Fix use of util.CommandError
mpm@selenic.com
parents: 515
diff changeset
161 errmsg = "%s: %s" % (errprefix, errmsg)
870
a82eae840447 Teach walk code about absolute paths.
Bryan O'Sullivan <bos@serpentine.com>
parents: 869
diff changeset
162 raise Abort(errmsg)
508
42a660abaf75 [PATCH] Harden os.system
mpm@selenic.com
parents: 464
diff changeset
163
421
43b8da7420a9 [PATCH] rename under the other OS
mpm@selenic.com
parents: 419
diff changeset
164 def rename(src, dst):
43b8da7420a9 [PATCH] rename under the other OS
mpm@selenic.com
parents: 419
diff changeset
165 try:
43b8da7420a9 [PATCH] rename under the other OS
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parents: 419
diff changeset
166 os.rename(src, dst)
43b8da7420a9 [PATCH] rename under the other OS
mpm@selenic.com
parents: 419
diff changeset
167 except:
43b8da7420a9 [PATCH] rename under the other OS
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parents: 419
diff changeset
168 os.unlink(dst)
43b8da7420a9 [PATCH] rename under the other OS
mpm@selenic.com
parents: 419
diff changeset
169 os.rename(src, dst)
43b8da7420a9 [PATCH] rename under the other OS
mpm@selenic.com
parents: 419
diff changeset
170
698
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 667
diff changeset
171 def copytree(src, dst, copyfile):
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 667
diff changeset
172 """Copy a directory tree, files are copied using 'copyfile'."""
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 667
diff changeset
173 names = os.listdir(src)
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 667
diff changeset
174 os.mkdir(dst)
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 667
diff changeset
175
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 667
diff changeset
176 for name in names:
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
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parents: 667
diff changeset
177 srcname = os.path.join(src, name)
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 667
diff changeset
178 dstname = os.path.join(dst, name)
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 667
diff changeset
179 if os.path.isdir(srcname):
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 667
diff changeset
180 copytree(srcname, dstname, copyfile)
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 667
diff changeset
181 elif os.path.isfile(srcname):
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 667
diff changeset
182 copyfile(srcname, dstname)
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 667
diff changeset
183 else:
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 667
diff changeset
184 raise IOError("Not a regular file: %r" % srcname)
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 667
diff changeset
185
704
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
186 def _makelock_file(info, pathname):
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
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parents: 698
diff changeset
187 ld = os.open(pathname, os.O_CREAT | os.O_WRONLY | os.O_EXCL)
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
188 os.write(ld, info)
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
189 os.close(ld)
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
190
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
191 def _readlock_file(pathname):
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
192 return file(pathname).read()
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
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parents: 698
diff changeset
193
421
43b8da7420a9 [PATCH] rename under the other OS
mpm@selenic.com
parents: 419
diff changeset
194 # Platfor specific varients
419
28511fc21073 [PATCH] file seperator handling for the other 'OS'
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parents:
diff changeset
195 if os.name == 'nt':
461
9ae0034f2772 [PATCH] /dev/null for other OS
mpm@selenic.com
parents: 441
diff changeset
196 nulldev = 'NUL:'
9ae0034f2772 [PATCH] /dev/null for other OS
mpm@selenic.com
parents: 441
diff changeset
197
441
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
198 def is_exec(f, last):
e8af362cfb01 Permission handling for the other OS
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parents: 422
diff changeset
199 return last
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
200
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
201 def set_exec(f, mode):
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
202 pass
515
03f27b1381f9 Whitespace cleanups
mpm@selenic.com
parents: 508
diff changeset
203
419
28511fc21073 [PATCH] file seperator handling for the other 'OS'
mpm@selenic.com
parents:
diff changeset
204 def pconvert(path):
28511fc21073 [PATCH] file seperator handling for the other 'OS'
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parents:
diff changeset
205 return path.replace("\\", "/")
422
10c43444a38e [PATCH] Enables lock work under the other 'OS'
mpm@selenic.com
parents: 421
diff changeset
206
704
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
207 makelock = _makelock_file
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
208 readlock = _readlock_file
461
9ae0034f2772 [PATCH] /dev/null for other OS
mpm@selenic.com
parents: 441
diff changeset
209
782
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
210 def explain_exit(code):
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
211 return "exited with status %d" % code, code
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
212
419
28511fc21073 [PATCH] file seperator handling for the other 'OS'
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parents:
diff changeset
213 else:
461
9ae0034f2772 [PATCH] /dev/null for other OS
mpm@selenic.com
parents: 441
diff changeset
214 nulldev = '/dev/null'
9ae0034f2772 [PATCH] /dev/null for other OS
mpm@selenic.com
parents: 441
diff changeset
215
441
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
216 def is_exec(f, last):
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
217 return (os.stat(f).st_mode & 0100 != 0)
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
218
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
219 def set_exec(f, mode):
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
220 s = os.stat(f).st_mode
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
221 if (s & 0100 != 0) == mode:
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
222 return
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
223 if mode:
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
224 # Turn on +x for every +r bit when making a file executable
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
225 # and obey umask.
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
226 umask = os.umask(0)
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
227 os.umask(umask)
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
228 os.chmod(f, s | (s & 0444) >> 2 & ~umask)
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
229 else:
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
230 os.chmod(f, s & 0666)
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
231
419
28511fc21073 [PATCH] file seperator handling for the other 'OS'
mpm@selenic.com
parents:
diff changeset
232 def pconvert(path):
28511fc21073 [PATCH] file seperator handling for the other 'OS'
mpm@selenic.com
parents:
diff changeset
233 return path
28511fc21073 [PATCH] file seperator handling for the other 'OS'
mpm@selenic.com
parents:
diff changeset
234
422
10c43444a38e [PATCH] Enables lock work under the other 'OS'
mpm@selenic.com
parents: 421
diff changeset
235 def makelock(info, pathname):
704
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
236 try:
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
237 os.symlink(info, pathname)
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
238 except OSError, why:
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
239 if why.errno == errno.EEXIST:
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
240 raise
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
241 else:
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
242 _makelock_file(info, pathname)
422
10c43444a38e [PATCH] Enables lock work under the other 'OS'
mpm@selenic.com
parents: 421
diff changeset
243
10c43444a38e [PATCH] Enables lock work under the other 'OS'
mpm@selenic.com
parents: 421
diff changeset
244 def readlock(pathname):
704
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
245 try:
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
246 return os.readlink(pathname)
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
247 except OSError, why:
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
248 if why.errno == errno.EINVAL:
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
249 return _readlock_file(pathname)
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
250 else:
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
251 raise
782
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
252
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
253 def explain_exit(code):
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
254 """return a 2-tuple (desc, code) describing a process's status"""
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
255 if os.WIFEXITED(code):
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
256 val = os.WEXITSTATUS(code)
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
257 return "exited with status %d" % val, val
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
258 elif os.WIFSIGNALED(code):
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
259 val = os.WTERMSIG(code)
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
260 return "killed by signal %d" % val, val
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
261 elif os.WIFSTOPPED(code):
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
262 val = os.STOPSIG(code)
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
263 return "stopped by signal %d" % val, val
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
264 raise ValueError("invalid exit code")