Mercurial > hg > mercurial-crew-with-dirclash
annotate mercurial/util.py @ 884:087771ebe2e6
Fix walk code for files that do not exist anywhere, and unhandled types.
Prior to this, a file that did not exist was reported as showing up in
the filesystem, as were files of unsupported types (such as fifos).
Now, an error message is printed and nothing is returned in such cases.
This change also moves the commands.pathto function to the util module,
as the walk code needs it to print non-confusing error messages.
author | Bryan O'Sullivan <bos@serpentine.com> |
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date | Fri, 12 Aug 2005 11:16:58 -0800 |
parents | 63ca8a68d59e |
children | 6594ba2a0f51 509de8ab6f31 |
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 |
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 |
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 | |
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19 class Abort(Exception): |
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20 """Raised if a command needs to print an error and exit.""" |
508 | 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 |
742 | 103 def regex(name, tail): |
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) + '$' |
742 | 110 return head + globre(name, '', tail) |
111 | |
112 def matchfn(pats, tail): | |
113 """build a matching function from a set of patterns""" | |
114 if pats: | |
115 pat = '(?:%s)' % '|'.join([regex(p, tail) for p in pats]) | |
116 return re.compile(pat).match | |
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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137 root = globprefix(name) |
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138 if root: roots.append(root) |
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139 elif kind == 'relpath': |
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140 files.append(name) |
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141 roots.append(name) |
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142 |
820
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143 patmatch = matchfn(pats, '$') or always |
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144 filematch = matchfn(files, '(?:/|$)') or always |
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145 incmatch = matchfn(inc, '(?:/|$)') or always |
742 | 146 excmatch = matchfn(exc, '(?:/|$)') or (lambda fn: False) |
147 | |
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148 return roots, lambda fn: (incmatch(fn) and not excmatch(fn) and |
812
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149 (fn.endswith('/') or |
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150 (not pats and not files) or |
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151 (pats and patmatch(fn)) or |
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152 (files and filematch(fn)))) |
742 | 153 |
521 | 154 def system(cmd, errprefix=None): |
508 | 155 """execute a shell command that must succeed""" |
156 rc = os.system(cmd) | |
157 if rc: | |
521 | 158 errmsg = "%s %s" % (os.path.basename(cmd.split(None, 1)[0]), |
159 explain_exit(rc)[0]) | |
160 if errprefix: | |
161 errmsg = "%s: %s" % (errprefix, errmsg) | |
870
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162 raise Abort(errmsg) |
508 | 163 |
421 | 164 def rename(src, dst): |
165 try: | |
166 os.rename(src, dst) | |
167 except: | |
168 os.unlink(dst) | |
169 os.rename(src, dst) | |
170 | |
698
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171 def copytree(src, dst, copyfile): |
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172 """Copy a directory tree, files are copied using 'copyfile'.""" |
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173 names = os.listdir(src) |
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174 os.mkdir(dst) |
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175 |
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176 for name in names: |
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177 srcname = os.path.join(src, name) |
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178 dstname = os.path.join(dst, name) |
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179 if os.path.isdir(srcname): |
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180 copytree(srcname, dstname, copyfile) |
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181 elif os.path.isfile(srcname): |
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182 copyfile(srcname, dstname) |
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183 else: |
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184 raise IOError("Not a regular file: %r" % srcname) |
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185 |
704
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186 def _makelock_file(info, pathname): |
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187 ld = os.open(pathname, os.O_CREAT | os.O_WRONLY | os.O_EXCL) |
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188 os.write(ld, info) |
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189 os.close(ld) |
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190 |
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191 def _readlock_file(pathname): |
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192 return file(pathname).read() |
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193 |
421 | 194 # Platfor specific varients |
419
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195 if os.name == 'nt': |
461 | 196 nulldev = 'NUL:' |
197 | |
441 | 198 def is_exec(f, last): |
199 return last | |
200 | |
201 def set_exec(f, mode): | |
202 pass | |
515 | 203 |
419
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204 def pconvert(path): |
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205 return path.replace("\\", "/") |
422
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206 |
704
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207 makelock = _makelock_file |
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208 readlock = _readlock_file |
461 | 209 |
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210 def explain_exit(code): |
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211 return "exited with status %d" % code, code |
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212 |
419
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213 else: |
461 | 214 nulldev = '/dev/null' |
215 | |
441 | 216 def is_exec(f, last): |
217 return (os.stat(f).st_mode & 0100 != 0) | |
218 | |
219 def set_exec(f, mode): | |
220 s = os.stat(f).st_mode | |
221 if (s & 0100 != 0) == mode: | |
222 return | |
223 if mode: | |
224 # Turn on +x for every +r bit when making a file executable | |
225 # and obey umask. | |
226 umask = os.umask(0) | |
227 os.umask(umask) | |
228 os.chmod(f, s | (s & 0444) >> 2 & ~umask) | |
229 else: | |
230 os.chmod(f, s & 0666) | |
231 | |
419
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232 def pconvert(path): |
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233 return path |
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234 |
422
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235 def makelock(info, pathname): |
704
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236 try: |
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237 os.symlink(info, pathname) |
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238 except OSError, why: |
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239 if why.errno == errno.EEXIST: |
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240 raise |
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241 else: |
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242 _makelock_file(info, pathname) |
422
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243 |
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244 def readlock(pathname): |
704
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245 try: |
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246 return os.readlink(pathname) |
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247 except OSError, why: |
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248 if why.errno == errno.EINVAL: |
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249 return _readlock_file(pathname) |
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250 else: |
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251 raise |
782
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252 |
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253 def explain_exit(code): |
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254 """return a 2-tuple (desc, code) describing a process's status""" |
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255 if os.WIFEXITED(code): |
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256 val = os.WEXITSTATUS(code) |
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257 return "exited with status %d" % val, val |
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258 elif os.WIFSIGNALED(code): |
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259 val = os.WTERMSIG(code) |
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260 return "killed by signal %d" % val, val |
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261 elif os.WIFSTOPPED(code): |
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262 val = os.STOPSIG(code) |
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263 return "stopped by signal %d" % val, val |
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264 raise ValueError("invalid exit code") |