Mercurial > hg
annotate mercurial/util.py @ 1030:28e2f13ca7c4
Merge with MPM.
author | Bryan O'Sullivan <bos@serpentine.com> |
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date | Tue, 23 Aug 2005 21:57:22 -0700 |
parents | 22571b8d35d3 |
children | 503aaf19a040 |
rev | line source |
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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 |
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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 binary(s): |
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13 if s and '\0' in s[:4096]: |
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14 return True |
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15 return False |
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16 |
556 | 17 def unique(g): |
18 seen = {} | |
19 for f in g: | |
20 if f not in seen: | |
21 seen[f] = 1 | |
22 yield f | |
23 | |
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24 class Abort(Exception): |
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25 """Raised if a command needs to print an error and exit.""" |
508 | 26 |
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27 def always(fn): return True |
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28 def never(fn): return False |
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29 |
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30 def globre(pat, head = '^', tail = '$'): |
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31 "convert a glob pattern into a regexp" |
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32 i, n = 0, len(pat) |
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33 res = '' |
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34 group = False |
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35 def peek(): return i < n and pat[i] |
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36 while i < n: |
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37 c = pat[i] |
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38 i = i+1 |
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39 if c == '*': |
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40 if peek() == '*': |
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41 i += 1 |
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42 res += '.*' |
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43 else: |
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44 res += '[^/]*' |
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45 elif c == '?': |
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46 res += '.' |
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47 elif c == '[': |
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48 j = i |
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49 if j < n and pat[j] in '!]': |
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50 j += 1 |
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51 while j < n and pat[j] != ']': |
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52 j += 1 |
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53 if j >= n: |
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54 res += '\\[' |
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55 else: |
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56 stuff = pat[i:j].replace('\\','\\\\') |
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57 i = j + 1 |
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58 if stuff[0] == '!': |
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59 stuff = '^' + stuff[1:] |
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60 elif stuff[0] == '^': |
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61 stuff = '\\' + stuff |
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62 res = '%s[%s]' % (res, stuff) |
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63 elif c == '{': |
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64 group = True |
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65 res += '(?:' |
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66 elif c == '}' and group: |
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67 res += ')' |
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68 group = False |
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69 elif c == ',' and group: |
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70 res += '|' |
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71 else: |
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72 res += re.escape(c) |
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73 return head + res + tail |
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74 |
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75 _globchars = {'[': 1, '{': 1, '*': 1, '?': 1} |
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76 |
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77 def pathto(n1, n2): |
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78 '''return the relative path from one place to another. |
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79 this returns a path in the form used by the local filesystem, not hg.''' |
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80 if not n1: return localpath(n2) |
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81 a, b = n1.split('/'), n2.split('/') |
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82 a.reverse(), b.reverse() |
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83 while a and b and a[-1] == b[-1]: |
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84 a.pop(), b.pop() |
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85 b.reverse() |
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86 return os.sep.join((['..'] * len(a)) + b) |
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87 |
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88 def canonpath(repo, cwd, myname): |
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89 rootsep = repo.root + os.sep |
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90 name = myname |
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91 if not name.startswith(os.sep): |
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92 name = os.path.join(repo.root, cwd, name) |
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93 name = os.path.normpath(name) |
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94 if name.startswith(rootsep): |
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95 return pconvert(name[len(rootsep):]) |
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96 elif name == repo.root: |
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97 return '' |
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98 else: |
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99 raise Abort('%s not under repository root' % myname) |
897 | 100 |
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101 def matcher(repo, cwd, names, inc, exc, head = ''): |
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102 def patkind(name): |
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103 for prefix in 're:', 'glob:', 'path:', 'relpath:': |
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104 if name.startswith(prefix): return name.split(':', 1) |
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105 for c in name: |
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106 if c in _globchars: return 'glob', name |
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107 return 'relpath', name |
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108 |
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109 def regex(kind, name, tail): |
742 | 110 '''convert a pattern into a regular expression''' |
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111 if kind == 're': |
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112 return name |
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113 elif kind == 'path': |
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114 return '^' + re.escape(name) + '(?:/|$)' |
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115 elif kind == 'relpath': |
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116 return head + re.escape(name) + tail |
742 | 117 return head + globre(name, '', tail) |
118 | |
119 def matchfn(pats, tail): | |
120 """build a matching function from a set of patterns""" | |
121 if pats: | |
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122 pat = '(?:%s)' % '|'.join([regex(k, p, tail) for (k, p) in pats]) |
742 | 123 return re.compile(pat).match |
124 | |
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125 def globprefix(pat): |
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126 '''return the non-glob prefix of a path, e.g. foo/* -> foo''' |
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127 root = [] |
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128 for p in pat.split(os.sep): |
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129 if patkind(p)[0] == 'glob': break |
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130 root.append(p) |
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131 return '/'.join(root) |
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132 |
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133 pats = [] |
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134 files = [] |
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135 roots = [] |
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136 for kind, name in map(patkind, names): |
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137 if kind in ('glob', 'relpath'): |
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138 name = canonpath(repo, cwd, name) |
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139 if name == '': |
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140 kind, name = 'glob', '**' |
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141 if kind in ('glob', 'path', 're'): |
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142 pats.append((kind, name)) |
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143 if kind == 'glob': |
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144 root = globprefix(name) |
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145 if root: roots.append(root) |
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146 elif kind == 'relpath': |
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147 files.append((kind, name)) |
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148 roots.append(name) |
897 | 149 |
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150 patmatch = matchfn(pats, '$') or always |
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151 filematch = matchfn(files, '(?:/|$)') or always |
897 | 152 incmatch = always |
153 if inc: | |
154 incmatch = matchfn(map(patkind, inc), '(?:/|$)') | |
155 excmatch = lambda fn: False | |
156 if exc: | |
157 excmatch = matchfn(map(patkind, exc), '(?:/|$)') | |
742 | 158 |
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159 return roots, lambda fn: (incmatch(fn) and not excmatch(fn) and |
812
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160 (fn.endswith('/') or |
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161 (not pats and not files) or |
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162 (pats and patmatch(fn)) or |
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163 (files and filematch(fn)))) |
742 | 164 |
521 | 165 def system(cmd, errprefix=None): |
508 | 166 """execute a shell command that must succeed""" |
167 rc = os.system(cmd) | |
168 if rc: | |
521 | 169 errmsg = "%s %s" % (os.path.basename(cmd.split(None, 1)[0]), |
170 explain_exit(rc)[0]) | |
171 if errprefix: | |
172 errmsg = "%s: %s" % (errprefix, errmsg) | |
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173 raise Abort(errmsg) |
508 | 174 |
421 | 175 def rename(src, dst): |
176 try: | |
177 os.rename(src, dst) | |
178 except: | |
179 os.unlink(dst) | |
180 os.rename(src, dst) | |
181 | |
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182 def copytree(src, dst, copyfile): |
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183 """Copy a directory tree, files are copied using 'copyfile'.""" |
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184 names = os.listdir(src) |
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185 os.mkdir(dst) |
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186 |
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187 for name in names: |
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188 srcname = os.path.join(src, name) |
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189 dstname = os.path.join(dst, name) |
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190 if os.path.isdir(srcname): |
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191 copytree(srcname, dstname, copyfile) |
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192 elif os.path.isfile(srcname): |
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193 copyfile(srcname, dstname) |
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194 else: |
917 | 195 pass |
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196 |
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197 def _makelock_file(info, pathname): |
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198 ld = os.open(pathname, os.O_CREAT | os.O_WRONLY | os.O_EXCL) |
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199 os.write(ld, info) |
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200 os.close(ld) |
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201 |
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202 def _readlock_file(pathname): |
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203 return file(pathname).read() |
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204 |
421 | 205 # Platfor specific varients |
419
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206 if os.name == 'nt': |
461 | 207 nulldev = 'NUL:' |
208 | |
441 | 209 def is_exec(f, last): |
210 return last | |
211 | |
212 def set_exec(f, mode): | |
213 pass | |
515 | 214 |
419
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215 def pconvert(path): |
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216 return path.replace("\\", "/") |
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217 |
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218 def localpath(path): |
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219 return path.replace('/', '\\') |
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220 |
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221 def normpath(path): |
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222 return pconvert(os.path.normpath(path)) |
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223 |
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224 makelock = _makelock_file |
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225 readlock = _readlock_file |
461 | 226 |
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227 def explain_exit(code): |
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228 return "exited with status %d" % code, code |
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229 |
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230 else: |
461 | 231 nulldev = '/dev/null' |
232 | |
441 | 233 def is_exec(f, last): |
234 return (os.stat(f).st_mode & 0100 != 0) | |
235 | |
236 def set_exec(f, mode): | |
237 s = os.stat(f).st_mode | |
238 if (s & 0100 != 0) == mode: | |
239 return | |
240 if mode: | |
241 # Turn on +x for every +r bit when making a file executable | |
242 # and obey umask. | |
243 umask = os.umask(0) | |
244 os.umask(umask) | |
245 os.chmod(f, s | (s & 0444) >> 2 & ~umask) | |
246 else: | |
247 os.chmod(f, s & 0666) | |
248 | |
419
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249 def pconvert(path): |
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250 return path |
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251 |
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252 def localpath(path): |
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253 return path |
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254 |
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255 normpath = os.path.normpath |
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256 |
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257 def makelock(info, pathname): |
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258 try: |
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259 os.symlink(info, pathname) |
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260 except OSError, why: |
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261 if why.errno == errno.EEXIST: |
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262 raise |
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263 else: |
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264 _makelock_file(info, pathname) |
422
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265 |
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266 def readlock(pathname): |
704
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267 try: |
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268 return os.readlink(pathname) |
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269 except OSError, why: |
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270 if why.errno == errno.EINVAL: |
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271 return _readlock_file(pathname) |
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272 else: |
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273 raise |
782
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274 |
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275 def explain_exit(code): |
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276 """return a 2-tuple (desc, code) describing a process's status""" |
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277 if os.WIFEXITED(code): |
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278 val = os.WEXITSTATUS(code) |
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279 return "exited with status %d" % val, val |
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280 elif os.WIFSIGNALED(code): |
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281 val = os.WTERMSIG(code) |
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282 return "killed by signal %d" % val, val |
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283 elif os.WIFSTOPPED(code): |
912
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284 val = os.WSTOPSIG(code) |
782
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285 return "stopped by signal %d" % val, val |
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286 raise ValueError("invalid exit code") |