lib/hg.py

   1 # -*- coding: utf-8 -*-
   2 import os
   3 import codecs
   4 from mercurial import localrepo, ui, match, node, encoding, util
   5 import mercurial.merge, mercurial.error
   6
   7 encoding.encoding = 'utf-8'
   8
   9
  10 class RepositoryDoesNotExist(Exception):
  11     pass
  12
  13 class Repository(object):
  14     """Abstrakcja repozytorium Mercurial. Działa z Mercurial w wersji 1.3.1."""
  15
  16     def __init__(self, path, create=False):
  17         self.ui = ui.ui()
  18         self.ui.config('ui', 'quiet', 'true')
  19         self.ui.config('ui', 'interactive', 'false')
  20
  21         self.real_path = os.path.realpath(path)
  22         self.repo = self.open_repository(self.real_path, create)
  23         self._pending_files = []
  24
  25     def open_repository(self, path, create=False):
  26         if os.path.isdir(path):
  27             try:
  28                 return localrepo.localrepository(self.ui, path)
  29             except mercurial.error.RepoError:
  30                 # dir is not an hg repo, we must init it
  31                 if create:
  32                     return localrepo.localrepository(self.ui, path, create=1)
  33         elif create:
  34             os.makedirs(path)
  35             return localrepo.localrepository(self.ui, path, create=1)
  36         raise RepositoryDoesNotExist("Repository %s does not exist." % path)
  37
  38     def file_list(self, branch='default'):
  39         return self.in_branch(lambda: self._file_list(), branch)
  40
  41     def _file_list(self):
  42         return list(self.repo[None])
  43
  44     def get_file(self, path, branch='default'):
  45         return self.in_branch(lambda: self._get_file(path), branch)
  46
  47     def _get_file(self, path):
  48         return self.repo.wread(path)
  49
  50     def add_file(self, path, value, branch='default'):
  51         return self.in_branch(lambda: self._add_file(path, value), branch)
  52
  53     def _add_file(self, path, value):
  54         return self.repo.wwrite(path, value.encode('utf-8'), [])
  55
  56     def _commit(self, message, user=None):
  57         return self.repo.commit(text=message, user=user)
  58
  59     def commit(self, message, user=None, branch='default'):
  60         return self.in_branch(lambda: self._commit(message, key=key, user=user), branch)
  61
  62     def in_branch(self, action, bname='default'):
  63         wlock = self.repo.wlock()
  64         try:
  65             old = self._switch_to_branch(bname)
  66             try:
  67                 # do some stuff
  68                 return action()
  69             finally:
  70                 self._switch_to_branch(old)
  71         finally:
  72             wlock.release()
  73
  74     def _switch_to_branch(self, bname, create=True):
  75         wlock = self.repo.wlock()
  76         try:
  77             current = self.repo[None].branch()
  78             if current == bname:
  79                 return current
  80             try:
  81                 tip = self.repo.branchtags()[bname]
  82             except KeyError, ke:
  83                 if not create: raise ke
  84
  85                 # create the branch on the fly
  86
  87                 # first switch to default branch
  88                 default_tip = self.repo.branchtags()['default']
  89                 mercurial.merge.update(self.repo, default_tip, False, True, None)
  90
  91                 # set the dirstate to new branch
  92                 self.repo.dirstate.setbranch(bname)
  93                 self._commit('Initial commit for automatic branch "%s".' % bname, user="django-admin")
  94
  95                 # collect the new tip
  96                 tip = self.repo.branchtags()[bname]
  97
  98             upstats = mercurial.merge.update(self.repo, tip, False, True, None)
  99             return current
 100         except KeyError, ke:
 101             raise RepositoryException("Can't switch to branch '%s': no such branch." % bname , ke)
 102         except util.Abort, ae:
 103             raise repositoryException("Can't switch to branch '%s': %s"  % (bname, ae.message), ae)
 104         finally:
 105             wlock.release()
 106
 107     def write_lock(self):
 108         """Returns w write lock to the repository."""
 109         return self.repo.wlock()
 110
 111
 112 class RepositoryException(Exception):
 113
 114     def __init__(self, msg, cause=None):
 115         Exception.__init__(self, msg)
 116         self.cause = cause