Mercurial > hg
annotate mercurial/hook.py @ 6819:78624d74e194
dirstate.walk: eliminate filter function
- remove _filter and delete original
- improve some filtering logic
author | Matt Mackall <mpm@selenic.com> |
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date | Tue, 22 Jul 2008 13:03:08 -0500 |
parents | f67d1468ac50 |
children | 810ca383da9c |
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1 # hook.py - hook support for mercurial |
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2 # |
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3 # Copyright 2007 Matt Mackall <mpm@selenic.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 from i18n import _ |
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9 import util, os, sys |
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10 |
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11 def _pythonhook(ui, repo, name, hname, funcname, args, throw): |
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12 '''call python hook. hook is callable object, looked up as |
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13 name in python module. if callable returns "true", hook |
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14 fails, else passes. if hook raises exception, treated as |
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15 hook failure. exception propagates if throw is "true". |
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16 |
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17 reason for "true" meaning "hook failed" is so that |
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18 unmodified commands (e.g. mercurial.commands.update) can |
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19 be run as hooks without wrappers to convert return values.''' |
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20 |
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21 ui.note(_("calling hook %s: %s\n") % (hname, funcname)) |
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22 obj = funcname |
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23 if not callable(obj): |
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24 d = funcname.rfind('.') |
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25 if d == -1: |
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26 raise util.Abort(_('%s hook is invalid ("%s" not in ' |
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27 'a module)') % (hname, funcname)) |
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28 modname = funcname[:d] |
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29 try: |
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30 obj = __import__(modname) |
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31 except ImportError: |
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32 try: |
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33 # extensions are loaded with hgext_ prefix |
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34 obj = __import__("hgext_%s" % modname) |
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35 except ImportError: |
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36 raise util.Abort(_('%s hook is invalid ' |
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37 '(import of "%s" failed)') % |
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38 (hname, modname)) |
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39 try: |
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40 for p in funcname.split('.')[1:]: |
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41 obj = getattr(obj, p) |
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42 except AttributeError, err: |
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43 raise util.Abort(_('%s hook is invalid ' |
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44 '("%s" is not defined)') % |
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45 (hname, funcname)) |
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46 if not callable(obj): |
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47 raise util.Abort(_('%s hook is invalid ' |
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48 '("%s" is not callable)') % |
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49 (hname, funcname)) |
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50 try: |
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51 r = obj(ui=ui, repo=repo, hooktype=name, **args) |
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52 except (KeyboardInterrupt, util.SignalInterrupt): |
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53 raise |
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54 except Exception, exc: |
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55 if isinstance(exc, util.Abort): |
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56 ui.warn(_('error: %s hook failed: %s\n') % |
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57 (hname, exc.args[0])) |
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58 else: |
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59 ui.warn(_('error: %s hook raised an exception: ' |
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60 '%s\n') % (hname, exc)) |
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61 if throw: |
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62 raise |
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63 ui.print_exc() |
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64 return True |
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65 if r: |
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66 if throw: |
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67 raise util.Abort(_('%s hook failed') % hname) |
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68 ui.warn(_('warning: %s hook failed\n') % hname) |
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69 return r |
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70 |
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71 def _exthook(ui, repo, name, cmd, args, throw): |
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72 ui.note(_("running hook %s: %s\n") % (name, cmd)) |
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73 env = dict([('HG_' + k.upper(), v) for k, v in args.iteritems()]) |
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74 if repo: |
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75 cwd = repo.root |
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76 else: |
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77 cwd = os.getcwd() |
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78 r = util.system(cmd, environ=env, cwd=cwd) |
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79 if r: |
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80 desc, r = util.explain_exit(r) |
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81 if throw: |
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82 raise util.Abort(_('%s hook %s') % (name, desc)) |
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83 ui.warn(_('warning: %s hook %s\n') % (name, desc)) |
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84 return r |
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85 |
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86 _redirect = False |
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87 def redirect(state): |
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88 global _redirect |
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89 _redirect = state |
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90 |
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91 def hook(ui, repo, name, throw=False, **args): |
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92 r = False |
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93 |
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94 if _redirect: |
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95 # temporarily redirect stdout to stderr |
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96 oldstdout = os.dup(sys.__stdout__.fileno()) |
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97 os.dup2(sys.__stderr__.fileno(), sys.__stdout__.fileno()) |
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98 |
6762 | 99 for hname, cmd in util.sort(ui.configitems('hooks')): |
100 if hname.split('.')[0] != name or not cmd: | |
101 continue | |
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102 if callable(cmd): |
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103 r = _pythonhook(ui, repo, name, hname, cmd, args, throw) or r |
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104 elif cmd.startswith('python:'): |
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105 r = _pythonhook(ui, repo, name, hname, cmd[7:].strip(), |
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106 args, throw) or r |
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107 else: |
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108 r = _exthook(ui, repo, hname, cmd, args, throw) or r |
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109 |
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110 if _redirect: |
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111 os.dup2(oldstdout, sys.__stdout__.fileno()) |
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112 os.close(oldstdout) |
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113 |
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114 return r |