Mercurial > hg > mercurial-crew-with-dirclash
annotate mercurial/util.py @ 596:9a8daeff0ffa
A bunch of parsing/help updates
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A bunch of parsing/help updates
more explanation of how to get non-basic commands
shorten names of debug functions and add docstrings
add undo long docstring
promote anotate, export, and revert
make the global opts array global
refactor parsing
kill two unused arguments to fancyopts
update test-help
manifest hash: 459ae2273aaf54f71b4576677a681dc53ab2908c
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author | mpm@selenic.com |
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date | Sun, 03 Jul 2005 11:47:45 -0800 |
parents | f6c6fa15ff70 |
children | 31a9aa890016 |
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 |
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9 |
556 | 10 def unique(g): |
11 seen = {} | |
12 for f in g: | |
13 if f not in seen: | |
14 seen[f] = 1 | |
15 yield f | |
16 | |
508 | 17 class CommandError(Exception): pass |
18 | |
19 def explain_exit(code): | |
20 """return a 2-tuple (desc, code) describing a process's status""" | |
21 if os.WIFEXITED(code): | |
22 val = os.WEXITSTATUS(code) | |
23 return "exited with status %d" % val, val | |
24 elif os.WIFSIGNALED(code): | |
25 val = os.WTERMSIG(code) | |
26 return "killed by signal %d" % val, val | |
27 elif os.WIFSTOPPED(code): | |
28 val = os.STOPSIG(code) | |
29 return "stopped by signal %d" % val, val | |
30 raise ValueError("invalid exit code") | |
515 | 31 |
521 | 32 def system(cmd, errprefix=None): |
508 | 33 """execute a shell command that must succeed""" |
34 rc = os.system(cmd) | |
35 if rc: | |
521 | 36 errmsg = "%s %s" % (os.path.basename(cmd.split(None, 1)[0]), |
37 explain_exit(rc)[0]) | |
38 if errprefix: | |
39 errmsg = "%s: %s" % (errprefix, errmsg) | |
508 | 40 raise CommandError(errmsg) |
41 | |
421 | 42 def rename(src, dst): |
43 try: | |
44 os.rename(src, dst) | |
45 except: | |
46 os.unlink(dst) | |
47 os.rename(src, dst) | |
48 | |
49 # Platfor specific varients | |
419
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50 if os.name == 'nt': |
461 | 51 nulldev = 'NUL:' |
52 | |
441 | 53 def is_exec(f, last): |
54 return last | |
55 | |
56 def set_exec(f, mode): | |
57 pass | |
515 | 58 |
419
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59 def pconvert(path): |
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60 return path.replace("\\", "/") |
422
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61 |
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62 def makelock(info, pathname): |
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63 ld = os.open(pathname, os.O_CREAT | os.O_WRONLY | os.O_EXCL) |
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64 os.write(ld, info) |
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65 os.close(ld) |
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66 |
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67 def readlock(pathname): |
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68 return file(pathname).read() |
461 | 69 |
419
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70 else: |
461 | 71 nulldev = '/dev/null' |
72 | |
441 | 73 def is_exec(f, last): |
74 return (os.stat(f).st_mode & 0100 != 0) | |
75 | |
76 def set_exec(f, mode): | |
77 s = os.stat(f).st_mode | |
78 if (s & 0100 != 0) == mode: | |
79 return | |
80 if mode: | |
81 # Turn on +x for every +r bit when making a file executable | |
82 # and obey umask. | |
83 umask = os.umask(0) | |
84 os.umask(umask) | |
85 os.chmod(f, s | (s & 0444) >> 2 & ~umask) | |
86 else: | |
87 os.chmod(f, s & 0666) | |
88 | |
419
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89 def pconvert(path): |
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90 return path |
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91 |
422
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92 def makelock(info, pathname): |
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93 os.symlink(info, pathname) |
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94 |
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95 def readlock(pathname): |
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96 return os.readlink(pathname) |