lib/wlrepo/mercurial_backend/library.py

   1 # -*- encoding: utf-8 -*-
   2
   3 __author__= "Łukasz Rekucki"
   4 __date__ = "$2009-09-25 09:33:02$"
   5 __doc__ = "Module documentation."
   6
   7 import mercurial
   8 from mercurial import localrepo as hglrepo
   9 from mercurial import ui as hgui
  10 from mercurial import error
  11 import wlrepo
  12
  13 from wlrepo.mercurial_backend import MercurialRevision
  14 from wlrepo.mercurial_backend.document import MercurialDocument
  15
  16 class MergeStatus(object):
  17     def __init__(self, mstatus):
  18         self.updated = mstatus[0]
  19         self.merged = mstatus[1]
  20         self.removed = mstatus[2]
  21         self.unresolved = mstatus[3]
  22
  23     def isclean(self):
  24         return self.unresolved == 0
  25
  26 class UpdateStatus(object):
  27
  28     def __init__(self, mstatus):
  29         self.modified = mstatus[0]
  30         self.added = mstatus[1]
  31         self.removed = mstatus[2]
  32         self.deleted = mstatus[3]
  33         self.untracked = mstatus[4]
  34         self.ignored = mstatus[5]
  35         self.clean = mstatus[6]
  36
  37     def has_changes(self):
  38         return bool(len(self.modified) + len(self.added) + \
  39                     len(self.removed) + len(self.deleted))
  40
  41 class MercurialLibrary(wlrepo.Library):
  42     """Mercurial implementation of the Library API"""
  43
  44     def __init__(self, path, **kwargs):
  45         super(wlrepo.Library, self).__init__( ** kwargs)
  46
  47         self._revcache = {}
  48         self._doccache = {}
  49
  50         self._hgui = hgui.ui()
  51         self._hgui.config('ui', 'quiet', 'true')
  52         self._hgui.config('ui', 'interactive', 'false')
  53
  54         import os.path
  55         self._ospath = self._sanitize_string(os.path.realpath(path))
  56
  57         if os.path.isdir(path):
  58             try:
  59                 self._hgrepo = hglrepo.localrepository(self._hgui, path)
  60             except mercurial.error.RepoError:
  61                 raise wlrepo.LibraryException("[HGLibrary] Not a valid repository at path '%s'." % path)
  62         elif kwargs.get('create', False):
  63             os.makedirs(path)
  64             try:
  65                 self._hgrepo = hglrepo.localrepository(self._hgui, path, create=1)
  66             except mercurial.error.RepoError:
  67                 raise wlrepo.LibraryException("[HGLibrary] Can't create a repository on path '%s'." % path)
  68         else:
  69             raise wlrepo.LibraryException("[HGLibrary] Can't open a library on path '%s'." % path)
  70
  71
  72     def documents(self):
  73         return [ key[5:] for key in \
  74             self._hgrepo.branchmap() if key.startswith("$doc:") ]
  75
  76     @property
  77     def ospath(self):
  78         return self._ospath.decode('utf-8')
  79
  80     def document_for_rev(self, revision):
  81         if revision is None:
  82             raise ValueError("Revision can't be None.")
  83
  84         if not isinstance(revision, MercurialRevision):
  85             revision = self._sanitize_string(unicode(revision))
  86             rev = self.get_revision(revision)
  87         else:
  88             rev = revision
  89
  90         if not self._doccache.has_key(str(rev)):
  91             self._doccache[str(rev)] = MercurialDocument(self, rev)
  92
  93         # every revision is a document
  94         return self._doccache[str(rev)]
  95
  96     def document(self, docid, user=None):
  97         return self.document_for_rev(self.fulldocid(docid, user))
  98
  99     def get_revision(self, revid):
 100         revid = self._sanitize_string(revid)
 101
 102         try:
 103             ctx = self._changectx(revid)
 104         except mercurial.error.RepoError, e:
 105             raise wlrepo.RevisionNotFound(revid)
 106
 107         if ctx is None:
 108             raise wlrepo.RevisionNotFound(revid)
 109
 110         if self._revcache.has_key(ctx):
 111             return self._revcache[ctx]
 112
 113         return MercurialRevision(self, ctx)
 114
 115     def fulldocid(self, docid, user=None):
 116         fulldocid = u''
 117         if user is not None:
 118             fulldocid += u'$user:' + user
 119         fulldocid += u'$doc:' + docid
 120         return fulldocid
 121
 122
 123     def has_revision(self, revid):
 124         try:
 125             self._hgrepo[revid]
 126             return True
 127         except mercurial.error.RepoError:
 128             return False
 129
 130     def document_create(self, docid):
 131
 132
 133         # check if it already exists
 134         fullid = self.fulldocid(docid)
 135
 136         if self.has_revision(fullid):
 137             raise wlrepo.DocumentAlreadyExists(u"Document %s already exists!" % docid);
 138
 139         # doesn't exist
 140         self._create_branch(self._sanitize_string(fullid))
 141         return self.document_for_rev(fullid)
 142
 143     #
 144     # Private methods
 145     #
 146
 147     #
 148     # Locking
 149     #
 150
 151     def lock(self, write_mode=False):
 152         return self._hgrepo.wlock() # no support for read/write mode yet
 153
 154     def _transaction(self, write_mode, action):
 155         lock = self.lock(write_mode)
 156         try:
 157             return action(self)
 158         finally:
 159             lock.release()
 160
 161     #
 162     # Basic repo manipulation
 163     #
 164
 165     def _checkout(self, rev, force=True):
 166         return MergeStatus(mercurial.merge.update(self._hgrepo, rev, False, force, None))
 167
 168     def _merge(self, rev):
 169         """ Merge the revision into current working directory """
 170         return MergeStatus(mercurial.merge.update(self._hgrepo, rev, True, False, None))
 171
 172     def _common_ancestor(self, revA, revB):
 173         return self._hgrepo[revA].ancestor(self.repo[revB])
 174
 175     def _commit(self, message, user=u"library"):
 176         return self._hgrepo.commit(text=message, user=user)
 177
 178
 179     def _fileexists(self, fileid):
 180         return (fileid in self._hgrepo[None])
 181
 182     def _fileadd(self, fileid):
 183         return self._hgrepo.add([fileid])
 184
 185     def _filesadd(self, fileid_list):
 186         return self._hgrepo.add(fileid_list)
 187
 188     def _filerm(self, fileid):
 189         return self._hgrepo.remove([fileid])
 190
 191     def _filesrm(self, fileid_list):
 192         return self._hgrepo.remove(fileid_list)
 193
 194     def _fileopen(self, path, mode):
 195         return self._hgrepo.wopener(path, mode)
 196
 197     def _filectx(self, fileid, revid):
 198         return self._hgrepo.filectx(fileid, changeid=revid)
 199
 200     def _changectx(self, nodeid):
 201         return self._hgrepo.changectx(nodeid)
 202
 203     def _rollback(self):
 204         return self._hgrepo.rollback()
 205
 206     #
 207     # BASIC BRANCH routines
 208     #
 209
 210     def _bname(self, user, docid):
 211         """Returns a branch name for a given document and user."""
 212         docid = self._sanitize_string(docid)
 213         uname = self._sanitize_string(user)
 214         return "personal_" + uname + "_file_" + docid;
 215
 216     def _has_branch(self, name):
 217         return self._hgrepo.branchmap().has_key(self._sanitize_string(name))
 218
 219     def _branch_tip(self, name):
 220         name = self._sanitize_string(name)
 221         return self._hgrepo.branchtags()[name]
 222
 223     def _create_branch(self, name, parent=None, before_commit=None):
 224         name = self._sanitize_string(name)
 225
 226         if self._has_branch(name): return # just exit
 227
 228         if parent is None:
 229             parentrev = self._hgrepo['$branchbase'].node()
 230         else:
 231             parentrev = parent.hgrev()
 232
 233         self._checkout(parentrev)
 234         self._hgrepo.dirstate.setbranch(name)
 235
 236         if before_commit: before_commit(self)
 237
 238         self._commit("$ADMN$ Initial commit for branch '%s'." % name, user='$library')
 239
 240     def _switch_to_branch(self, branchname):
 241         current = self._hgrepo[None].branch()
 242
 243         if current == branchname:
 244             return current # quick exit
 245
 246         self._checkout(self._branch_tip(branchname))
 247         return branchname
 248
 249     #
 250     # Utils
 251     #
 252
 253     @staticmethod
 254     def _sanitize_string(s):
 255         if s is None:
 256             return None
 257
 258         if isinstance(s, unicode):
 259             s = s.encode('utf-8')
 260
 261         return s