Mercurial > hg > gitserve

annotate mercurial/util.py @ 871:c2e77581bc84

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Merge with mpm.
author Bryan O'Sullivan <bos@serpentine.com>
date Tue, 09 Aug 2005 17:24:38 -0800
parents a82eae840447 9c918287d10b
children d4cb383e7de7 781266a78fe1
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419
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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 canonpath(repo, cwd, myname):
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73 rootsep = repo.root + os.sep
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74 name = myname
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75 if not name.startswith(os.sep):
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76 name = os.path.join(repo.root, cwd, name)
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77 name = os.path.normpath(name)
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78 if name.startswith(rootsep):
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79 return name[len(rootsep):]
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80 elif name == repo.root:
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81 return ''
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82 else:
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83 raise Abort('%s not under repository root' % myname)
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84
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85 def matcher(repo, cwd, names, inc, exc, head = ''):
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86 def patkind(name):
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87 for prefix in 're:', 'glob:', 'path:':
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88 if name.startswith(prefix): return name.split(':', 1)
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89 for c in name:
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90 if c in _globchars: return 'glob', name
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91 return 'relpath', name
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92
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93 def regex(name, tail):
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94 '''convert a pattern into a regular expression'''
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95 kind, name = patkind(name)
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96 if kind == 're':
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97 return name
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98 elif kind == 'path':
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99 return '^' + re.escape(name) + '$'
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100 return head + globre(name, '', tail)
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101
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102 def matchfn(pats, tail):
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103 """build a matching function from a set of patterns"""
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104 if pats:
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105 pat = '(?:%s)' % '|'.join([regex(p, tail) for p in pats])
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106 return re.compile(pat).match
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107
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108 def globprefix(pat):
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109 '''return the non-glob prefix of a path, e.g. foo/* -> foo'''
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110 root = []
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111 for p in pat.split(os.sep):
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112 if patkind(p)[0] == 'glob': break
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113 root.append(p)
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114 return os.sep.join(root)
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115
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116 pats = []
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117 files = []
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118 roots = []
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119 for kind, name in map(patkind, names):
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120 if kind in ('glob', 'relpath'):
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121 name = canonpath(repo, cwd, name)
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122 if name == '':
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123 kind, name = 'glob', '**'
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124 if kind in ('glob', 're'):
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125 pats.append(name)
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126 if kind == 'glob':
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127 root = globprefix(name)
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128 if root: roots.append(root)
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129 elif kind == 'relpath':
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130 files.append(name)
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131 roots.append(name)
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132
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133 patmatch = matchfn(pats, '$') or always
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134 filematch = matchfn(files, '(?:/|$)') or always
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135 incmatch = matchfn(inc, '(?:/|$)') or always
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136 excmatch = matchfn(exc, '(?:/|$)') or (lambda fn: False)
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137
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138 return roots, lambda fn: (incmatch(fn) and not excmatch(fn) and
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diff changeset
139 (fn.endswith('/') or
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140 (not pats and not files) or
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141 (pats and patmatch(fn)) or
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diff changeset
142 (files and filematch(fn))))
742
092937de2ad7 Refactor matchpats and walk
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diff changeset
143
521
0fb8ade0f756 [PATCH] Fix use of util.CommandError
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parents: 515
diff changeset
144 def system(cmd, errprefix=None):
508
42a660abaf75 [PATCH] Harden os.system
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parents: 464
diff changeset
145 """execute a shell command that must succeed"""
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parents: 464
diff changeset
146 rc = os.system(cmd)
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parents: 464
diff changeset
147 if rc:
521
0fb8ade0f756 [PATCH] Fix use of util.CommandError
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parents: 515
diff changeset
148 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
149 explain_exit(rc)[0])
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parents: 515
diff changeset
150 if errprefix:
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mpm@selenic.com
parents: 515
diff changeset
151 errmsg = "%s: %s" % (errprefix, errmsg)
870
a82eae840447 Teach walk code about absolute paths.
Bryan O'Sullivan <bos@serpentine.com>
parents: 869
diff changeset
152 raise Abort(errmsg)
508
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diff changeset
153
421
43b8da7420a9 [PATCH] rename under the other OS
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parents: 419
diff changeset
154 def rename(src, dst):
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parents: 419
diff changeset
155 try:
43b8da7420a9 [PATCH] rename under the other OS
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parents: 419
diff changeset
156 os.rename(src, dst)
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parents: 419
diff changeset
157 except:
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parents: 419
diff changeset
158 os.unlink(dst)
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parents: 419
diff changeset
159 os.rename(src, dst)
43b8da7420a9 [PATCH] rename under the other OS
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parents: 419
diff changeset
160
698
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 667
diff changeset
161 def copytree(src, dst, copyfile):
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
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parents: 667
diff changeset
162 """Copy a directory tree, files are copied using 'copyfile'."""
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
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parents: 667
diff changeset
163 names = os.listdir(src)
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parents: 667
diff changeset
164 os.mkdir(dst)
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parents: 667
diff changeset
165
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 667
diff changeset
166 for name in names:
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diff changeset
167 srcname = os.path.join(src, name)
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parents: 667
diff changeset
168 dstname = os.path.join(dst, name)
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parents: 667
diff changeset
169 if os.path.isdir(srcname):
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parents: 667
diff changeset
170 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
171 elif os.path.isfile(srcname):
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
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parents: 667
diff changeset
172 copyfile(srcname, dstname)
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Thomas Arendsen Hein <thomas@intevation.de>
parents: 667
diff changeset
173 else:
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
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parents: 667
diff changeset
174 raise IOError("Not a regular file: %r" % srcname)
df78d8ccac4c Use python function instead of external 'cp' command when cloning repos.
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parents: 667
diff changeset
175
704
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
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parents: 698
diff changeset
176 def _makelock_file(info, pathname):
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177 ld = os.open(pathname, os.O_CREAT | os.O_WRONLY | os.O_EXCL)
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diff changeset
178 os.write(ld, info)
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diff changeset
179 os.close(ld)
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
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parents: 698
diff changeset
180
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
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181 def _readlock_file(pathname):
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diff changeset
182 return file(pathname).read()
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diff changeset
183
421
43b8da7420a9 [PATCH] rename under the other OS
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parents: 419
diff changeset
184 # Platfor specific varients
419
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parents:
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185 if os.name == 'nt':
461
9ae0034f2772 [PATCH] /dev/null for other OS
mpm@selenic.com
parents: 441
diff changeset
186 nulldev = 'NUL:'
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parents: 441
diff changeset
187
441
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
188 def is_exec(f, last):
e8af362cfb01 Permission handling for the other OS
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parents: 422
diff changeset
189 return last
e8af362cfb01 Permission handling for the other OS
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parents: 422
diff changeset
190
e8af362cfb01 Permission handling for the other OS
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parents: 422
diff changeset
191 def set_exec(f, mode):
e8af362cfb01 Permission handling for the other OS
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parents: 422
diff changeset
192 pass
515
03f27b1381f9 Whitespace cleanups
mpm@selenic.com
parents: 508
diff changeset
193
419
28511fc21073 [PATCH] file seperator handling for the other 'OS'
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parents:
diff changeset
194 def pconvert(path):
28511fc21073 [PATCH] file seperator handling for the other 'OS'
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parents:
diff changeset
195 return path.replace("\\", "/")
422
10c43444a38e [PATCH] Enables lock work under the other 'OS'
mpm@selenic.com
parents: 421
diff changeset
196
704
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
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diff changeset
197 makelock = _makelock_file
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diff changeset
198 readlock = _readlock_file
461
9ae0034f2772 [PATCH] /dev/null for other OS
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parents: 441
diff changeset
199
782
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
200 def explain_exit(code):
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parents: 742
diff changeset
201 return "exited with status %d" % code, code
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diff changeset
202
419
28511fc21073 [PATCH] file seperator handling for the other 'OS'
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parents:
diff changeset
203 else:
461
9ae0034f2772 [PATCH] /dev/null for other OS
mpm@selenic.com
parents: 441
diff changeset
204 nulldev = '/dev/null'
9ae0034f2772 [PATCH] /dev/null for other OS
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parents: 441
diff changeset
205
441
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
206 def is_exec(f, last):
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parents: 422
diff changeset
207 return (os.stat(f).st_mode & 0100 != 0)
e8af362cfb01 Permission handling for the other OS
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parents: 422
diff changeset
208
e8af362cfb01 Permission handling for the other OS
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parents: 422
diff changeset
209 def set_exec(f, mode):
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
210 s = os.stat(f).st_mode
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
211 if (s & 0100 != 0) == mode:
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
212 return
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
213 if mode:
e8af362cfb01 Permission handling for the other OS
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parents: 422
diff changeset
214 # Turn on +x for every +r bit when making a file executable
e8af362cfb01 Permission handling for the other OS
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parents: 422
diff changeset
215 # and obey umask.
e8af362cfb01 Permission handling for the other OS
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parents: 422
diff changeset
216 umask = os.umask(0)
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
217 os.umask(umask)
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
218 os.chmod(f, s | (s & 0444) >> 2 & ~umask)
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
219 else:
e8af362cfb01 Permission handling for the other OS
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parents: 422
diff changeset
220 os.chmod(f, s & 0666)
e8af362cfb01 Permission handling for the other OS
mpm@selenic.com
parents: 422
diff changeset
221
419
28511fc21073 [PATCH] file seperator handling for the other 'OS'
mpm@selenic.com
parents:
diff changeset
222 def pconvert(path):
28511fc21073 [PATCH] file seperator handling for the other 'OS'
mpm@selenic.com
parents:
diff changeset
223 return path
28511fc21073 [PATCH] file seperator handling for the other 'OS'
mpm@selenic.com
parents:
diff changeset
224
422
10c43444a38e [PATCH] Enables lock work under the other 'OS'
mpm@selenic.com
parents: 421
diff changeset
225 def makelock(info, pathname):
704
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
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parents: 698
diff changeset
226 try:
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
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parents: 698
diff changeset
227 os.symlink(info, pathname)
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
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parents: 698
diff changeset
228 except OSError, why:
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
229 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
230 raise
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
231 else:
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
232 _makelock_file(info, pathname)
422
10c43444a38e [PATCH] Enables lock work under the other 'OS'
mpm@selenic.com
parents: 421
diff changeset
233
10c43444a38e [PATCH] Enables lock work under the other 'OS'
mpm@selenic.com
parents: 421
diff changeset
234 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
235 try:
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
236 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
237 except OSError, why:
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
238 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
239 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
240 else:
5ca319a641e1 Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 698
diff changeset
241 raise
782
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
242
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
243 def explain_exit(code):
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
244 """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
245 if os.WIFEXITED(code):
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
246 val = os.WEXITSTATUS(code)
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
247 return "exited with status %d" % val, val
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
248 elif os.WIFSIGNALED(code):
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
249 val = os.WTERMSIG(code)
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
250 return "killed by signal %d" % val, val
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
251 elif os.WIFSTOPPED(code):
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
252 val = os.STOPSIG(code)
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
253 return "stopped by signal %d" % val, val
cdb9e95b2fab Provided platform dependent implementations for explain_exit
thananck@yahoo.com
parents: 742
diff changeset
254 raise ValueError("invalid exit code")