def ParsePatchSet(patchset):
"""Patch a patch set into individual patches.
Args:
patchset: a models.PatchSet instance.
Returns:
A list of models.Patch instances.
"""
patches = []
for filename, text in SplitPatch(patchset.data):
patches.append(models.Patch(patchset=patchset, text=utils.to_dbtext(text),
filename=filename, parent=patchset))
return patches
def ParsePatchSet(patchset):
"""Patch a patch set into individual patches.
Args:
patchset: a models.PatchSet instance.
Returns:
A list of models.Patch instances.
"""
patches = []
ps_key = patchset.key()
splitted = SplitPatch(patchset.data)
if not splitted:
return []
first_id, last_id = db.allocate_ids(
db.Key.from_path(models.Patch.kind(), 1, parent=ps_key), len(splitted))
ids = range(first_id, last_id + 1)
for filename, text in splitted:
key = db.Key.from_path(models.Patch.kind(), ids.pop(0), parent=ps_key)
patches.append(models.Patch(patchset=patchset, text=utils.to_dbtext(text),
filename=filename, key=key))
return patches
def ParsePatchSet(patchset):
"""Patch a patch set into individual patches.
Args:
patchset: a models.PatchSet instance.
Returns:
A list of models.Patch instances.
"""
patches = []
ps_key = patchset.key
splitted = engine_utils.SplitPatch(patchset.data)
if not splitted:
return []
first_id, last_id = models.Patch.allocate_ids(len(splitted), parent=ps_key)
ids = range(first_id, last_id + 1)
for filename, text in splitted:
key = ndb.Key(models.Patch, ids.pop(0), parent=ps_key)
patches.append(
models.Patch(patchset_key=patchset.key,
text=utils.to_dbtext(text),
filename=filename,
key=key))
return patches
class Patch(db.Model):
"""A single patch, i.e. a set of changes to a single file.
This is a descendant of a PatchSet.
"""
patchset = db.ReferenceProperty(PatchSet) # == parent
filename = db.StringProperty()
status = db.StringProperty() # 'A', 'A +', 'M', 'D' etc
text = db.TextProperty()
content = db.ReferenceProperty(Content)
patched_content = db.ReferenceProperty(Content, collection_name='patch2_set')
is_binary = db.BooleanProperty(default=False)
# Ids of patchsets that have a different version of this file.
delta = db.ListProperty(int)
delta_calculated = db.BooleanProperty(default=False)
_lines = None
@property
def lines(self):
"""The patch split into lines, retaining line endings.
The value is cached.
"""
if self._lines is not None:
return self._lines
if not self.text:
lines = []
else:
lines = self.text.splitlines(True)
self._lines = lines
return lines
_property_changes = None
@property
def property_changes(self):
"""The property changes split into lines.
The value is cached.
"""
if self._property_changes != None:
return self._property_changes
self._property_changes = []
match = re.search('^Property changes on.*\n'+'_'*67+'$', self.text,
re.MULTILINE)
if match:
self._property_changes = self.text[match.end():].splitlines()
return self._property_changes
_num_added = None
@property
def num_added(self):
"""The number of line additions in this patch.
The value is cached.
"""
if self._num_added is None:
self._num_added = self.count_startswith('+') - 1
return self._num_added
_num_removed = None
@property
def num_removed(self):
"""The number of line removals in this patch.
The value is cached.
"""
if self._num_removed is None:
self._num_removed = self.count_startswith('-') - 1
return self._num_removed
_num_chunks = None
@property
def num_chunks(self):
"""The number of 'chunks' in this patch.
A chunk is a block of lines starting with '@@'.
The value is cached.
"""
if self._num_chunks is None:
self._num_chunks = self.count_startswith('@@')
return self._num_chunks
_num_comments = None
@property
def num_comments(self):
"""The number of non-draft comments for this patch.
The value is cached.
"""
if self._num_comments is None:
self._num_comments = gql(Comment,
'WHERE patch = :1 AND draft = FALSE',
self).count()
return self._num_comments
_num_drafts = None
@property
def num_drafts(self):
"""The number of draft comments on this patch for the current user.
The value is expensive to compute, so it is cached.
"""
if self._num_drafts is None:
account = Account.current_user_account
if account is None:
self._num_drafts = 0
else:
query = gql(Comment,
'WHERE patch = :1 AND draft = TRUE AND author = :2',
self, account.user)
self._num_drafts = query.count()
return self._num_drafts
def count_startswith(self, prefix):
"""Returns the number of lines with the specified prefix."""
return len([l for l in self.lines if l.startswith(prefix)])
def get_content(self):
"""Get self.content, or fetch it if necessary.
This is the content of the file to which this patch is relative.
Returns:
a Content instance.
Raises:
FetchError: If there was a problem fetching it.
"""
try:
if self.content is not None:
if self.content.is_bad:
msg = 'Bad content. Try to upload again.'
logging.warn('Patch.get_content: %s', msg)
raise FetchError(msg)
if self.content.is_uploaded and self.content.text == None:
msg = 'Upload in progress.'
logging.warn('Patch.get_content: %s', msg)
raise FetchError(msg)
else:
return self.content
except db.Error:
# This may happen when a Content entity was deleted behind our back.
self.content = None
content = self.fetch_base()
content.put()
self.content = content
self.put()
return content
def get_patched_content(self):
"""Get self.patched_content, computing it if necessary.
This is the content of the file after applying this patch.
Returns:
a Content instance.
Raises:
FetchError: If there was a problem fetching the old content.
"""
try:
if self.patched_content is not None:
return self.patched_content
except db.Error:
# This may happen when a Content entity was deleted behind our back.
self.patched_content = None
old_lines = self.get_content().text.splitlines(True)
logging.info('Creating patched_content for %s', self.filename)
chunks = patching.ParsePatchToChunks(self.lines, self.filename)
new_lines = []
for _, _, new in patching.PatchChunks(old_lines, chunks):
new_lines.extend(new)
text = db.Text(''.join(new_lines))
patched_content = Content(text=text, parent=self)
patched_content.put()
self.patched_content = patched_content
self.put()
return patched_content
@property
def no_base_file(self):
"""Returns True iff the base file is not available."""
return self.content and self.content.file_too_large
def fetch_base(self):
"""Fetch base file for the patch.
Returns:
A models.Content instance.
Raises:
FetchError: For any kind of problem fetching the content.
"""
rev = patching.ParseRevision(self.lines)
if rev is not None:
if rev == 0:
# rev=0 means it's a new file.
return Content(text=db.Text(u''), parent=self)
# AppEngine can only fetch URLs that db.Link() thinks are OK,
# so try converting to a db.Link() here.
try:
base = db.Link(self.patchset.issue.base)
except db.BadValueError:
msg = 'Invalid base URL for fetching: %s' % self.patchset.issue.base
logging.warn(msg)
raise FetchError(msg)
url = utils.make_url(base, self.filename, rev)
logging.info('Fetching %s', url)
try:
result = urlfetch.fetch(url)
except urlfetch.Error, err:
msg = 'Error fetching %s: %s: %s' % (url, err.__class__.__name__, err)
logging.warn('FetchBase: %s', msg)
raise FetchError(msg)
if result.status_code != 200:
msg = 'Error fetching %s: HTTP status %s' % (url, result.status_code)
logging.warn('FetchBase: %s', msg)
raise FetchError(msg)
return Content(text=utils.to_dbtext(utils.unify_linebreaks(result.content)),
parent=self)
