')
+
+ revision = cls.objects.create(
+ parent=parent,
+ merge_parent=merge_parent,
+ author=author,
+ author_name=author_name,
+ author_email=author_email,
+ description=description
+ )
+ revision.save_text(text)
+ return revision
def materialize(self):
- f = self.data.storage.open(self.data)
- text = f.read()
+ f = repo.open(self.get_text_path())
+ text = f.read().decode('utf-8')
f.close()
- return unicode(text, 'utf-8')
-
- def merge_with(self, other, author=None,
- author_name=None, author_email=None,
- description=u"Automatic merge."):
- """Performs an automatic merge after straying commits."""
- assert self.tree_id == other.tree_id # same tree
- if other.parent_id == self.pk:
- # immediate child - fast forward
+ if text:
+ text = text.replace(
+ '
', '
')
+ return text
+
+ def is_descendant_of(self, other):
+ # Naive approach.
+ return (
+ (
+ self.parent is not None and (
+ self.parent.pk == other.pk or
+ self.parent.is_descendant_of(other)
+ )
+ ) or (
+ self.merge_parent is not None and (
+ self.merge_parent.pk == other.pk or
+ self.merge_parent.is_descendant_of(other)
+ )
+ )
+ )
+
+ def get_common_ancestor_with(self, other):
+ # VERY naive approach.
+ if self.pk == other.pk:
+ return self
+ if self.is_descendant_of(other):
return other
+ if other.is_descendant_of(self):
+ return self
- local = self.materialize().encode('utf-8')
- base = other.parent.materialize().encode('utf-8')
- remote = other.materialize().encode('utf-8')
-
- merge = simplemerge.Merge3Text(base, local, remote)
- result = ''.join(merge.merge_lines())
- merge_node = self.children.create(
- merge_parent=other, tree=self.tree,
- author=author,
- author_name=author_name,
- author_email=author_email,
- description=description)
- merge_node.data.save('', ContentFile(result))
- return merge_node
-
- def revert(self, **kwargs):
- """ commit this version of a doc as new head """
- self.tree.commit(text=self.materialize(), **kwargs)
-
- def set_publishable(self, publishable):
- self.publishable = publishable
- self.save()
- post_publishable.send(sender=self, publishable=publishable)
-
-
-def create_tag_model(model):
- name = model.__name__ + 'Tag'
-
- class Meta(Tag.Meta):
- app_label = model._meta.app_label
-
- if hasattr(model, 'TagMeta'):
- for attr, value in model.TagMeta.__dict__.items():
- setattr(Meta, attr, value)
-
- attrs = {
- '__module__': model.__module__,
- 'Meta': Meta,
- }
- return type(name, (Tag,), attrs)
-
-
-def create_change_model(model):
- name = model.__name__ + 'Change'
- repo = GzipFileSystemStorage(location=model.REPO_PATH)
-
- class Meta(Change.Meta):
- app_label = model._meta.app_label
-
- attrs = {
- '__module__': model.__module__,
- 'tree': models.ForeignKey(model, related_name='change_set', verbose_name=_('document')),
- 'tags': models.ManyToManyField(model.tag_model, verbose_name=_('tags'), related_name='change_set'),
- 'data': models.FileField(_('data'), upload_to=data_upload_to, storage=repo),
- 'Meta': Meta,
- }
- return type(name, (Change,), attrs)
-
-
-class DocumentMeta(ModelBase):
- "Metaclass for Document models."
- def __new__(cls, name, bases, attrs):
-
- model = super(DocumentMeta, cls).__new__(cls, name, bases, attrs)
- if not model._meta.abstract:
- # create a real Tag object and `stage' fk
- model.tag_model = create_tag_model(model)
- models.ForeignKey(model.tag_model, verbose_name=_('stage'),
- null=True, blank=True).contribute_to_class(model, 'stage')
-
- # create real Change model and `head' fk
- model.change_model = create_change_model(model)
-
- models.ForeignKey(model.change_model,
- null=True, blank=True, default=None,
- verbose_name=_('head'),
- help_text=_("This document's current head."),
- editable=False).contribute_to_class(model, 'head')
-
- models.ForeignKey(User, null=True, blank=True, editable=False,
- verbose_name=_('creator'), related_name="created_%s" % name.lower()
- ).contribute_to_class(model, 'creator')
-
- return model
-
-
-class Document(models.Model):
- """File in repository. Subclass it to use version control in your app."""
-
- __metaclass__ = DocumentMeta
-
- # default repository path
- REPO_PATH = os.path.join(settings.MEDIA_ROOT, 'dvcs')
-
- user = models.ForeignKey(User, null=True, blank=True,
- verbose_name=_('user'), help_text=_('Work assignment.'))
-
- class Meta:
- abstract = True
+ if self.parent is not None:
+ parent_ca = self.parent.get_common_ancestor_with(other)
+ else:
+ parent_ca = None
- def __unicode__(self):
- return u"{0}, HEAD: {1}".format(self.id, self.head_id)
+ if self.merge_parent is not None:
+ merge_parent_ca = self.merge_parent.get_common_ancestor_with(other)
+ else:
+ return parent_ca
+
+ if parent_ca is None or parent_ca.created_at < merge_parent_ca.created_at:
+ return merge_parent_ca
+
+ return parent_ca
+
+ def get_ancestors(self):
+ revs = set()
+ if self.parent is not None:
+ revs.add(self.parent)
+ revs.update(self.parent.get_ancestors())
+ if self.merge_parent is not None:
+ revs.add(self.merge_parent)
+ revs.update(self.merge_parent.get_ancestors())
+ return revs
+
+
+@python_2_unicode_compatible
+class Ref(models.Model):
+ """A reference pointing to a specific revision."""
+
+ revision = models.ForeignKey(
+ Revision, null=True, blank=True, default=None, verbose_name=_('revision'),
+ help_text=_("The document's revision."), editable=False)
+
+ def __str__(self):
+ return "ref:{0}->rev:{1}".format(self.id, self.revision_id)
+
+ def merge_text(self, base, local, remote):
+ """Override in subclass to have different kinds of merges."""
+ files = []
+ for f in local, base, remote:
+ temp = NamedTemporaryFile(delete=False)
+ temp.write(f)
+ temp.close()
+ files.append(temp.name)
+ p = Popen(['/usr/bin/diff3', '-mE', '-L', 'old', '-L', '', '-L', 'new'] + files, stdout=PIPE)
+ result, errs = p.communicate()
+
+ for f in files:
+ os.unlink(f)
+ return result.decode('utf-8')
+
+ def merge_with(self, revision, author=None, author_name=None, author_email=None, description="Automatic merge."):
+ """Merges a given revision into the ref."""
+ if self.revision is None:
+ fast_forward = True
+ self.revision = revision
+ elif self.revision.pk == revision.pk or self.revision.is_descendant_of(revision):
+ # Already merged.
+ return
+ elif revision.is_descendant_of(self.revision):
+ # Fast forward.
+ fast_forward = True
+ self.revision = revision
+ else:
+ # Need to create a merge revision.
+ fast_forward = False
+ base = self.revision.get_common_ancestor_with(revision)
+
+ local_text = self.materialize().encode('utf-8')
+ base_text = base.materialize().encode('utf-8')
+ other_text = revision.materialize().encode('utf-8')
+
+ merge_text = self.merge_text(base_text, local_text, other_text)
+
+ merge_revision = Revision.create(
+ text=merge_text,
+ parent=self.revision,
+ merge_parent=revision,
+ author=author,
+ author_name=author_name,
+ author_email=author_email,
+ description=description
+ )
+ self.revision = merge_revision
+ self.save()
+ post_merge.send(sender=type(self), instance=self, fast_forward=fast_forward)
- def materialize(self, change=None):
- if self.head is None:
- return u''
- if change is None:
- change = self.head
- elif not isinstance(change, Change):
- change = self.change_set.get(pk=change)
- return change.materialize()
+ def materialize(self):
+ return self.revision.materialize() if self.revision is not None else ''
- def commit(self, text, author=None, author_name=None, author_email=None,
- publishable=False, **kwargs):
- """Commits a new revision.
+ def commit(self, text, parent=False, author=None, author_name=None, author_email=None, description=''):
+ """Creates a new revision and sets it as the ref.
This will automatically merge the commit into the main branch,
if parent is not document's head.
:param unicode text: new version of the document
- :param parent: parent revision (head, if not specified)
- :type parent: Change or None
:param User author: the commiter
:param unicode author_name: commiter name (if ``author`` not specified)
:param unicode author_email: commiter e-mail (if ``author`` not specified)
- :param Tag[] tags: list of tags to apply to the new commit
- :param bool publishable: set new commit as ready to publish
:returns: new head
"""
- if 'parent' not in kwargs:
- parent = self.head
- else:
- parent = kwargs['parent']
- if parent is not None and not isinstance(parent, Change):
- parent = self.change_set.objects.get(pk=kwargs['parent'])
-
- tags = kwargs.get('tags', [])
- if tags:
- # set stage to next tag after the commited one
- self.stage = max(tags, key=lambda t: t.ordering).get_next()
-
- change = self.change_set.create(author=author,
- author_name=author_name,
- author_email=author_email,
- description=kwargs.get('description', ''),
- publishable=publishable,
- parent=parent)
-
- change.tags = tags
- change.data.save('', ContentFile(text.encode('utf-8')))
- change.save()
-
- if self.head:
- # merge new change as new head
- self.head = self.head.merge_with(change, author=author,
- author_name=author_name,
- author_email=author_email)
- else:
- self.head = change
- self.save()
-
- post_commit.send(sender=self.head)
-
- return self.head
+ if parent is False:
+ # If parent revision not set explicitly, use your head.
+ parent = self.revision
+
+ # Warning: this will silently leave revs unreferenced.
+ rev = Revision.create(
+ text=text,
+ author=author,
+ author_name=author_name,
+ author_email=author_email,
+ description=description,
+ parent=parent
+ )
+ self.merge_with(rev, author=author, author_name=author_name, author_email=author_email)
+
+ post_commit.send(sender=type(self), instance=self)
def history(self):
- return self.change_set.all().order_by('revision')
-
- def revision(self):
- rev = self.change_set.aggregate(
- models.Max('revision'))['revision__max']
- return rev
-
- def at_revision(self, rev):
- """Returns a Change with given revision number."""
- return self.change_set.get(revision=rev)
-
- def publishable(self):
- changes = self.history().filter(publishable=True)
- if changes.exists():
- return changes.order_by('-revision')[0]
- else:
- return None
-
- @transaction.commit_on_success
- def prepend_history(self, other):
- """Takes over the the other document's history and prepends to own."""
-
- assert self != other
- other_revs = other.change_set.all().count()
- # workaround for a non-atomic UPDATE in SQLITE
- self.change_set.all().update(revision=0-models.F('revision'))
- self.change_set.all().update(revision=other_revs - models.F('revision'))
- other.change_set.all().update(tree=self)
- assert not other.change_set.exists()
- other.delete()
+ revs = self.revision.get_ancestors()
+ revs.add(self.revision)
+ return sorted(revs, key=lambda x: x.created_at)