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annotate mercurial/hook.py @ 7305:c21d236ca897

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hgweb: descend empty directories in web view When a manifest has a series of directories with nothing in them but a single directory, displaying the entire chain of empty directories allows for navigation down to the first non-empty directory with a single click. Because Java links package hierarchy to directory hierarchy, and because Java conventions include at least three empty directories at the top of this hierarchy, descending down empty directories is very common in Java web tools.
author Ry4an Brase <ry4an-hg@ry4an.org>
date Mon, 03 Nov 2008 10:20:28 +0100
parents 810ca383da9c
children 196b05a548d0
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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:
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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
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99 for hname, cmd in util.sort(ui.configitems('hooks')):
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100 if hname.split('.')[0] != name or not cmd:
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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