Mercurial > hg > mercurial-crew-with-dirclash
annotate mercurial/util.py @ 839:9c918287d10b
Merge with BOS
author | mpm@selenic.com |
---|---|
date | Thu, 04 Aug 2005 13:31:25 -0800 |
parents | 1fe3b14c7044 0932bc2fb2be |
children | 1e3a23719662 c2e77581bc84 d4cb383e7de7 62ec665759f2 01215ad04283 |
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 |
724
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9 from demandload import * |
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10 demandload(globals(), "re") |
419
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11 |
556 | 12 def unique(g): |
13 seen = {} | |
14 for f in g: | |
15 if f not in seen: | |
16 seen[f] = 1 | |
17 yield f | |
18 | |
508 | 19 class CommandError(Exception): pass |
20 | |
724
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21 def always(fn): return True |
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22 def never(fn): return False |
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23 |
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24 def globre(pat, head = '^', tail = '$'): |
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25 "convert a glob pattern into a regexp" |
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26 i, n = 0, len(pat) |
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27 res = '' |
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28 group = False |
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29 def peek(): return i < n and pat[i] |
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30 while i < n: |
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31 c = pat[i] |
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32 i = i+1 |
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33 if c == '*': |
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34 if peek() == '*': |
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35 i += 1 |
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36 res += '.*' |
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37 else: |
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38 res += '[^/]*' |
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39 elif c == '?': |
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40 res += '.' |
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41 elif c == '[': |
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42 j = i |
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43 if j < n and pat[j] in '!]': |
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44 j += 1 |
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45 while j < n and pat[j] != ']': |
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46 j += 1 |
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47 if j >= n: |
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48 res += '\\[' |
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49 else: |
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50 stuff = pat[i:j].replace('\\','\\\\') |
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51 i = j + 1 |
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52 if stuff[0] == '!': |
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53 stuff = '^' + stuff[1:] |
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54 elif stuff[0] == '^': |
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55 stuff = '\\' + stuff |
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56 res = '%s[%s]' % (res, stuff) |
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57 elif c == '{': |
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58 group = True |
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59 res += '(?:' |
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60 elif c == '}' and group: |
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61 res += ')' |
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62 group = False |
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63 elif c == ',' and group: |
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64 res += '|' |
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65 else: |
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66 res += re.escape(c) |
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67 return head + res + tail |
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68 |
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69 _globchars = {'[': 1, '{': 1, '*': 1, '?': 1} |
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70 |
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71 def matcher(cwd, names, inc, exc, head = ''): |
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72 def patkind(name): |
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73 for prefix in 're:', 'glob:', 'path:': |
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74 if name.startswith(prefix): return name.split(':', 1) |
812
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75 for c in name: |
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76 if c in _globchars: return 'glob', name |
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77 return 'relpath', name |
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78 |
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79 cwdsep = cwd + os.sep |
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80 |
742 | 81 def regex(name, tail): |
82 '''convert a pattern into a regular expression''' | |
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83 kind, name = patkind(name) |
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84 if kind == 're': |
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85 return name |
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86 elif kind == 'path': |
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87 return '^' + re.escape(name) + '$' |
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88 if cwd: name = os.path.join(cwdsep, name) |
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89 name = os.path.normpath(name) |
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90 if name == '.': name = '**' |
742 | 91 return head + globre(name, '', tail) |
92 | |
93 def under(fn): | |
94 """check if fn is under our cwd""" | |
95 return not cwd or fn.startswith(cwdsep) | |
96 | |
97 def matchfn(pats, tail): | |
98 """build a matching function from a set of patterns""" | |
99 if pats: | |
100 pat = '(?:%s)' % '|'.join([regex(p, tail) for p in pats]) | |
101 return re.compile(pat).match | |
102 | |
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103 def globprefix(pat): |
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104 '''return the non-glob prefix of a path, e.g. foo/* -> foo''' |
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105 root = [] |
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106 for p in pat.split(os.sep): |
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107 if patkind(p)[0] == 'glob': break |
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108 root.append(p) |
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109 return os.sep.join(root) |
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110 |
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111 patkinds = map(patkind, names) |
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112 pats = [name for (kind, name) in patkinds if kind != 'relpath'] |
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113 files = [name for (kind, name) in patkinds if kind == 'relpath'] |
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114 roots = filter(None, map(globprefix, pats)) + files |
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115 if cwd: roots = [cwdsep + r for r in roots] |
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116 |
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117 patmatch = matchfn(pats, '$') or always |
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118 filematch = matchfn(files, '(?:/|$)') or always |
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119 incmatch = matchfn(inc, '(?:/|$)') or always |
742 | 120 excmatch = matchfn(exc, '(?:/|$)') or (lambda fn: False) |
121 | |
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122 return roots, lambda fn: (incmatch(fn) and not excmatch(fn) and |
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123 (fn.endswith('/') or |
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124 (not pats and not files) or |
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125 (pats and patmatch(fn)) or |
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126 (files and filematch(fn)))) |
742 | 127 |
521 | 128 def system(cmd, errprefix=None): |
508 | 129 """execute a shell command that must succeed""" |
130 rc = os.system(cmd) | |
131 if rc: | |
521 | 132 errmsg = "%s %s" % (os.path.basename(cmd.split(None, 1)[0]), |
133 explain_exit(rc)[0]) | |
134 if errprefix: | |
135 errmsg = "%s: %s" % (errprefix, errmsg) | |
508 | 136 raise CommandError(errmsg) |
137 | |
421 | 138 def rename(src, dst): |
139 try: | |
140 os.rename(src, dst) | |
141 except: | |
142 os.unlink(dst) | |
143 os.rename(src, dst) | |
144 | |
698
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145 def copytree(src, dst, copyfile): |
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146 """Copy a directory tree, files are copied using 'copyfile'.""" |
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147 names = os.listdir(src) |
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148 os.mkdir(dst) |
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149 |
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150 for name in names: |
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151 srcname = os.path.join(src, name) |
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152 dstname = os.path.join(dst, name) |
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153 if os.path.isdir(srcname): |
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154 copytree(srcname, dstname, copyfile) |
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155 elif os.path.isfile(srcname): |
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156 copyfile(srcname, dstname) |
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157 else: |
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158 raise IOError("Not a regular file: %r" % srcname) |
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159 |
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160 def _makelock_file(info, pathname): |
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161 ld = os.open(pathname, os.O_CREAT | os.O_WRONLY | os.O_EXCL) |
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162 os.write(ld, info) |
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163 os.close(ld) |
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164 |
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165 def _readlock_file(pathname): |
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166 return file(pathname).read() |
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167 |
421 | 168 # Platfor specific varients |
419
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169 if os.name == 'nt': |
461 | 170 nulldev = 'NUL:' |
171 | |
441 | 172 def is_exec(f, last): |
173 return last | |
174 | |
175 def set_exec(f, mode): | |
176 pass | |
515 | 177 |
419
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178 def pconvert(path): |
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179 return path.replace("\\", "/") |
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180 |
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181 makelock = _makelock_file |
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182 readlock = _readlock_file |
461 | 183 |
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184 def explain_exit(code): |
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185 return "exited with status %d" % code, code |
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186 |
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187 else: |
461 | 188 nulldev = '/dev/null' |
189 | |
441 | 190 def is_exec(f, last): |
191 return (os.stat(f).st_mode & 0100 != 0) | |
192 | |
193 def set_exec(f, mode): | |
194 s = os.stat(f).st_mode | |
195 if (s & 0100 != 0) == mode: | |
196 return | |
197 if mode: | |
198 # Turn on +x for every +r bit when making a file executable | |
199 # and obey umask. | |
200 umask = os.umask(0) | |
201 os.umask(umask) | |
202 os.chmod(f, s | (s & 0444) >> 2 & ~umask) | |
203 else: | |
204 os.chmod(f, s & 0666) | |
205 | |
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206 def pconvert(path): |
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207 return path |
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208 |
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209 def makelock(info, pathname): |
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210 try: |
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211 os.symlink(info, pathname) |
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212 except OSError, why: |
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213 if why.errno == errno.EEXIST: |
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214 raise |
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215 else: |
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216 _makelock_file(info, pathname) |
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217 |
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218 def readlock(pathname): |
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219 try: |
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220 return os.readlink(pathname) |
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221 except OSError, why: |
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222 if why.errno == errno.EINVAL: |
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223 return _readlock_file(pathname) |
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224 else: |
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225 raise |
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226 |
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227 def explain_exit(code): |
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228 """return a 2-tuple (desc, code) describing a process's status""" |
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229 if os.WIFEXITED(code): |
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230 val = os.WEXITSTATUS(code) |
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231 return "exited with status %d" % val, val |
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232 elif os.WIFSIGNALED(code): |
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233 val = os.WTERMSIG(code) |
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234 return "killed by signal %d" % val, val |
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235 elif os.WIFSTOPPED(code): |
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236 val = os.STOPSIG(code) |
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237 return "stopped by signal %d" % val, val |
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238 raise ValueError("invalid exit code") |