Mercurial > hg > mercurial-crew-with-dirclash
annotate mercurial/util.py @ 746:9095e3456ea7
Change C to M in status
author | mpm@selenic.com |
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date | Thu, 21 Jul 2005 12:24:42 -0500 |
parents | 092937de2ad7 |
children | cdb9e95b2fab 445970ccf57a |
rev | line source |
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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 |
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 | |
21 def explain_exit(code): | |
22 """return a 2-tuple (desc, code) describing a process's status""" | |
23 if os.WIFEXITED(code): | |
24 val = os.WEXITSTATUS(code) | |
25 return "exited with status %d" % val, val | |
26 elif os.WIFSIGNALED(code): | |
27 val = os.WTERMSIG(code) | |
28 return "killed by signal %d" % val, val | |
29 elif os.WIFSTOPPED(code): | |
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30 val = os.WSTOPSIG(code) |
508 | 31 return "stopped by signal %d" % val, val |
32 raise ValueError("invalid exit code") | |
515 | 33 |
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34 def always(fn): return True |
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35 def never(fn): return False |
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36 |
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37 def globre(pat, head = '^', tail = '$'): |
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38 "convert a glob pattern into a regexp" |
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39 i, n = 0, len(pat) |
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40 res = '' |
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41 group = False |
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42 def peek(): return i < n and pat[i] |
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43 while i < n: |
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44 c = pat[i] |
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45 i = i+1 |
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46 if c == '*': |
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47 if peek() == '*': |
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48 i += 1 |
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49 res += '.*' |
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50 else: |
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51 res += '[^/]*' |
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52 elif c == '?': |
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53 res += '.' |
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54 elif c == '[': |
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55 j = i |
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56 if j < n and pat[j] in '!]': |
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57 j += 1 |
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58 while j < n and pat[j] != ']': |
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59 j += 1 |
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60 if j >= n: |
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61 res += '\\[' |
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62 else: |
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63 stuff = pat[i:j].replace('\\','\\\\') |
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64 i = j + 1 |
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65 if stuff[0] == '!': |
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66 stuff = '^' + stuff[1:] |
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67 elif stuff[0] == '^': |
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68 stuff = '\\' + stuff |
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69 res = '%s[%s]' % (res, stuff) |
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70 elif c == '{': |
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71 group = True |
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72 res += '(?:' |
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73 elif c == '}' and group: |
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74 res += ')' |
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75 group = False |
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76 elif c == ',' and group: |
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77 res += '|' |
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78 else: |
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79 res += re.escape(c) |
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80 return head + res + tail |
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81 |
742 | 82 def matcher(cwd, pats, inc, exc, head = ''): |
83 def regex(name, tail): | |
84 '''convert a pattern into a regular expression''' | |
85 if name.startswith('re:'): | |
86 return name[3:] | |
87 elif name.startswith('path:'): | |
88 return '^' + re.escape(name[5:]) + '$' | |
89 elif name.startswith('glob:'): | |
90 return head + globre(name[5:], '', tail) | |
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 if cwd: | |
102 pat = re.escape(cwd + os.sep) + pat | |
103 return re.compile(pat).match | |
104 | |
105 cwdsep = cwd + os.sep | |
106 patmatch = matchfn(pats, '$') or (lambda fn: True) | |
107 incmatch = matchfn(inc, '(?:/|$)') or under | |
108 excmatch = matchfn(exc, '(?:/|$)') or (lambda fn: False) | |
109 | |
110 return lambda fn: (incmatch(fn) and not excmatch(fn) and | |
111 (fn.endswith('/') or patmatch(fn))) | |
112 | |
521 | 113 def system(cmd, errprefix=None): |
508 | 114 """execute a shell command that must succeed""" |
115 rc = os.system(cmd) | |
116 if rc: | |
521 | 117 errmsg = "%s %s" % (os.path.basename(cmd.split(None, 1)[0]), |
118 explain_exit(rc)[0]) | |
119 if errprefix: | |
120 errmsg = "%s: %s" % (errprefix, errmsg) | |
508 | 121 raise CommandError(errmsg) |
122 | |
421 | 123 def rename(src, dst): |
124 try: | |
125 os.rename(src, dst) | |
126 except: | |
127 os.unlink(dst) | |
128 os.rename(src, dst) | |
129 | |
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130 def copytree(src, dst, copyfile): |
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131 """Copy a directory tree, files are copied using 'copyfile'.""" |
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132 names = os.listdir(src) |
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133 os.mkdir(dst) |
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134 |
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135 for name in names: |
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136 srcname = os.path.join(src, name) |
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137 dstname = os.path.join(dst, name) |
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138 if os.path.isdir(srcname): |
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139 copytree(srcname, dstname, copyfile) |
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140 elif os.path.isfile(srcname): |
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141 copyfile(srcname, dstname) |
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142 else: |
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143 raise IOError("Not a regular file: %r" % srcname) |
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144 |
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145 def _makelock_file(info, pathname): |
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146 ld = os.open(pathname, os.O_CREAT | os.O_WRONLY | os.O_EXCL) |
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147 os.write(ld, info) |
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148 os.close(ld) |
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149 |
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150 def _readlock_file(pathname): |
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151 return file(pathname).read() |
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152 |
421 | 153 # Platfor specific varients |
419
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154 if os.name == 'nt': |
461 | 155 nulldev = 'NUL:' |
156 | |
441 | 157 def is_exec(f, last): |
158 return last | |
159 | |
160 def set_exec(f, mode): | |
161 pass | |
515 | 162 |
419
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163 def pconvert(path): |
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164 return path.replace("\\", "/") |
422
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165 |
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166 makelock = _makelock_file |
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167 readlock = _readlock_file |
461 | 168 |
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169 else: |
461 | 170 nulldev = '/dev/null' |
171 | |
441 | 172 def is_exec(f, last): |
173 return (os.stat(f).st_mode & 0100 != 0) | |
174 | |
175 def set_exec(f, mode): | |
176 s = os.stat(f).st_mode | |
177 if (s & 0100 != 0) == mode: | |
178 return | |
179 if mode: | |
180 # Turn on +x for every +r bit when making a file executable | |
181 # and obey umask. | |
182 umask = os.umask(0) | |
183 os.umask(umask) | |
184 os.chmod(f, s | (s & 0444) >> 2 & ~umask) | |
185 else: | |
186 os.chmod(f, s & 0666) | |
187 | |
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188 def pconvert(path): |
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189 return path |
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190 |
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191 def makelock(info, pathname): |
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192 try: |
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193 os.symlink(info, pathname) |
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194 except OSError, why: |
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195 if why.errno == errno.EEXIST: |
5ca319a641e1
Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents:
698
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196 raise |
5ca319a641e1
Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents:
698
diff
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197 else: |
5ca319a641e1
Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents:
698
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198 _makelock_file(info, pathname) |
422
10c43444a38e
[PATCH] Enables lock work under the other 'OS'
mpm@selenic.com
parents:
421
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199 |
10c43444a38e
[PATCH] Enables lock work under the other 'OS'
mpm@selenic.com
parents:
421
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200 def readlock(pathname): |
704
5ca319a641e1
Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents:
698
diff
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201 try: |
5ca319a641e1
Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents:
698
diff
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202 return os.readlink(pathname) |
5ca319a641e1
Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents:
698
diff
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203 except OSError, why: |
5ca319a641e1
Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents:
698
diff
changeset
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204 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
|
205 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
|
206 else: |
5ca319a641e1
Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents:
698
diff
changeset
|
207 raise |