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annotate mercurial/util.py @ 521:0fb8ade0f756

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[PATCH] Fix use of util.CommandError -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 [PATCH] Fix use of util.CommandError From: Bryan O'Sullivan <bos@serpentine.com> Fix CommandError so error messages don't say "abort: abort: ...". manifest hash: 2aea4c8043d321882dcdf846a42a55403ce1086f -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (GNU/Linux) iD8DBQFCwvOZywK+sNU5EO8RAqF/AJ9IIr6JPPUc15tb7w4lnI7yMFxSmgCfQUYn OX7Uz7G3dJNRIjAxJtGwCLo= =xj/W -----END PGP SIGNATURE-----
author mpm@selenic.com
date Wed, 29 Jun 2005 11:16:41 -0800
parents 03f27b1381f9
children f6c6fa15ff70
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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
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9
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10 class CommandError(Exception): pass
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11
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12 def explain_exit(code):
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13 """return a 2-tuple (desc, code) describing a process's status"""
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14 if os.WIFEXITED(code):
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15 val = os.WEXITSTATUS(code)
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16 return "exited with status %d" % val, val
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17 elif os.WIFSIGNALED(code):
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18 val = os.WTERMSIG(code)
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19 return "killed by signal %d" % val, val
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20 elif os.WIFSTOPPED(code):
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21 val = os.STOPSIG(code)
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22 return "stopped by signal %d" % val, val
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23 raise ValueError("invalid exit code")
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24
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25 def system(cmd, errprefix=None):
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26 """execute a shell command that must succeed"""
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27 rc = os.system(cmd)
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28 if rc:
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29 errmsg = "%s %s" % (os.path.basename(cmd.split(None, 1)[0]),
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30 explain_exit(rc)[0])
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31 if errprefix:
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32 errmsg = "%s: %s" % (errprefix, errmsg)
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33 raise CommandError(errmsg)
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34
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35 def rename(src, dst):
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36 try:
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37 os.rename(src, dst)
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38 except:
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39 os.unlink(dst)
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40 os.rename(src, dst)
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41
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42 # Platfor specific varients
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43 if os.name == 'nt':
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44 nulldev = 'NUL:'
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45
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46 def is_exec(f, last):
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47 return last
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48
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49 def set_exec(f, mode):
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50 pass
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51
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52 def pconvert(path):
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53 return path.replace("\\", "/")
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54
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55 def makelock(info, pathname):
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56 ld = os.open(pathname, os.O_CREAT | os.O_WRONLY | os.O_EXCL)
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57 os.write(ld, info)
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58 os.close(ld)
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59
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60 def readlock(pathname):
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61 return file(pathname).read()
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62
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63 else:
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64 nulldev = '/dev/null'
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65
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66 def is_exec(f, last):
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67 return (os.stat(f).st_mode & 0100 != 0)
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68
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69 def set_exec(f, mode):
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70 s = os.stat(f).st_mode
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71 if (s & 0100 != 0) == mode:
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72 return
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73 if mode:
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74 # Turn on +x for every +r bit when making a file executable
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75 # and obey umask.
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76 umask = os.umask(0)
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77 os.umask(umask)
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78 os.chmod(f, s | (s & 0444) >> 2 & ~umask)
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79 else:
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80 os.chmod(f, s & 0666)
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81
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82 def pconvert(path):
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83 return path
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84
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85 def makelock(info, pathname):
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86 os.symlink(info, pathname)
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87
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88 def readlock(pathname):
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89 return os.readlink(pathname)