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
  11
  12 class Repository(object):
  13     """Abstrakcja repozytorium Mercurial. Działa z Mercurial w wersji 1.3.1."""
  14
  15     def __init__(self, path, create=False):
  16         self.ui = ui.ui()
  17         self.ui.config('ui', 'quiet', 'true')
  18         self.ui.config('ui', 'interactive', 'false')
  19
  20         self.real_path = os.path.realpath(path)
  21         self.repo = self.open_repository(self.real_path, create)
  22         self._pending_files = []
  23
  24     def open_repository(self, path, create=False):
  25         if os.path.isdir(path):
  26             try:
  27                 return localrepo.localrepository(self.ui, path)
  28             except mercurial.error.RepoError:
  29                 # dir is not an hg repo, we must init it
  30                 if create:
  31                     return localrepo.localrepository(self.ui, path, create=1)
  32         elif create:
  33             os.makedirs(path)
  34             return localrepo.localrepository(self.ui, path, create=1)
  35         raise RepositoryDoesNotExist("Repository %s does not exist." % path)
  36
  37     def file_list(self, branch):
  38         return self.in_branch(lambda: self._file_list(), branch)
  39
  40     def _file_list(self):
  41         return list(self.repo[None])
  42
  43     def get_file(self, path, branch):
  44         return self.in_branch(lambda: self._get_file(path), branch)
  45
  46     def _get_file(self, path):
  47         if not self._file_exists(path):
  48             raise RepositoryException("File not availble in this branch.")
  49
  50         return self.repo.wread(path)
  51
  52     def file_exists(self, path, branch):
  53         return self.in_branch(lambda: self._file_exists(path), branch)
  54
  55     def _file_exists(self, path):
  56         return self.repo.dirstate[path] != "?"
  57
  58     def write_file(self, path, value, branch):
  59         return self.in_branch(lambda: self._write_file(path, value), branch)
  60
  61     def _write_file(self, path, value):
  62         return self.repo.wwrite(path, value, [])
  63
  64     def add_file(self, path, value, branch):
  65         return self.in_branch(lambda: self._add_file(path, value), branch)
  66
  67     def _add_file(self, path, value):
  68         self._write_file(path, value)
  69         return self.repo.add( [path] )
  70
  71     def _commit(self, message, user=None):
  72         return self.repo.commit(text=message, user=user)
  73
  74     def commit(self, message, branch, user=None):
  75         return self.in_branch(lambda: self._commit(message, key=key, user=user), branch)
  76
  77     def in_branch(self, action, bname):
  78         wlock = self.repo.wlock()
  79         try:
  80             old = self._switch_to_branch(bname)
  81             try:
  82                 # do some stuff
  83                 return action()
  84             finally:
  85                 self._switch_to_branch(old)
  86         finally:
  87             wlock.release()
  88
  89     def _switch_to_branch(self, bname, create=True):
  90         wlock = self.repo.wlock()
  91         try:
  92             current = self.repo[None].branch()
  93             if current == bname:
  94                 return current
  95             try:
  96                 tip = self.repo.branchtags()[bname]
  97             except KeyError, ke:
  98                 if not create: raise ke
  99
 100                 # create the branch on the fly
 101
 102                 # first switch to default branch
 103                 default_tip = self.repo.branchtags()['default']
 104                 mercurial.merge.update(self.repo, default_tip, False, True, None)
 105
 106                 # set the dirstate to new branch
 107                 self.repo.dirstate.setbranch(bname)
 108                 self._commit('Initial commit for automatic branch "%s".' % bname, user="django-admin")
 109
 110                 # collect the new tip
 111                 tip = self.repo.branchtags()[bname]
 112
 113             upstats = mercurial.merge.update(self.repo, tip, False, True, None)
 114             return current
 115         except KeyError, ke:
 116             raise RepositoryException("Can't switch to branch '%s': no such branch." % bname , ke)
 117         except util.Abort, ae:
 118             raise RepositoryException("Can't switch to branch '%s': %s"  % (bname, ae.message), ae)
 119         finally:
 120             wlock.release()
 121
 122     def write_lock(self):
 123         """Returns w write lock to the repository."""
 124         return self.repo.wlock()
 125
 126
 127 class RepositoryException(Exception):
 128
 129     def __init__(self, msg, cause=None):
 130         Exception.__init__(self, msg)
 131         self.cause = cause
 132
 133 class RepositoryDoesNotExist(RepositoryException):
 134     pass