pull requests: the node for null is not '0' but 40 * '0'

Fix crash in PR loading

kallithea/controllers/pullrequests.py

@@ -1,763 +1,763 b''
 # -*- coding: utf-8 -*-
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation, either version 3 of the License, or
 # (at your option) any later version.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 """
 kallithea.controllers.pullrequests
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 pull requests controller for Kallithea for initializing pull requests
 
 This file was forked by the Kallithea project in July 2014.
 Original author and date, and relevant copyright and licensing information is below:
 :created_on: May 7, 2012
 :author: marcink
 :copyright: (c) 2013 RhodeCode GmbH, and others.
 :license: GPLv3, see LICENSE.md for more details.
 """
 
 import logging
 import traceback
 import formencode
 import re
 
 from webob.exc import HTTPNotFound, HTTPForbidden, HTTPBadRequest
 
 from pylons import request, tmpl_context as c, url
 from pylons.controllers.util import redirect
 from pylons.i18n.translation import _
 
 from kallithea.lib.compat import json
 from kallithea.lib.base import BaseRepoController, render
 from kallithea.lib.auth import LoginRequired, HasRepoPermissionAnyDecorator,\
     NotAnonymous
 from kallithea.lib.helpers import Page
 from kallithea.lib import helpers as h
 from kallithea.lib import diffs
 from kallithea.lib.utils import action_logger, jsonify
 from kallithea.lib.vcs.utils import safe_str
 from kallithea.lib.vcs.exceptions import EmptyRepositoryError
 from kallithea.lib.diffs import LimitedDiffContainer
 from kallithea.model.db import  PullRequest, ChangesetStatus, ChangesetComment,\
     PullRequestReviewers
 from kallithea.model.pull_request import PullRequestModel
 from kallithea.model.meta import Session
 from kallithea.model.repo import RepoModel
 from kallithea.model.comment import ChangesetCommentsModel
 from kallithea.model.changeset_status import ChangesetStatusModel
 from kallithea.model.forms import PullRequestForm, PullRequestPostForm
 from kallithea.lib.utils2 import safe_int
 from kallithea.controllers.changeset import _ignorews_url,\
     _context_url, get_line_ctx, get_ignore_ws
 from kallithea.controllers.compare import CompareController
 from kallithea.lib.graphmod import graph_data
 
 log = logging.getLogger(__name__)
 
 
 class PullrequestsController(BaseRepoController):
 
     def __before__(self):
         super(PullrequestsController, self).__before__()
         repo_model = RepoModel()
         c.users_array = repo_model.get_users_js()
         c.user_groups_array = repo_model.get_user_groups_js()
 
     def _get_repo_refs(self, repo, rev=None, branch=None, branch_rev=None):
         """return a structure with repo's interesting changesets, suitable for
         the selectors in pullrequest.html
 
         rev: a revision that must be in the list somehow and selected by default
         branch: a branch that must be in the list and selected by default - even if closed
         branch_rev: a revision of which peers should be preferred and available."""
         # list named branches that has been merged to this named branch - it should probably merge back
         peers = []
 
         if rev:
             rev = safe_str(rev)
 
         if branch:
             branch = safe_str(branch)
 
         if branch_rev:
             branch_rev = safe_str(branch_rev)
             # a revset not restricting to merge() would be better
             # (especially because it would get the branch point)
             # ... but is currently too expensive
             # including branches of children could be nice too
             peerbranches = set()
             for i in repo._repo.revs(
                 "sort(parents(branch(id(%s)) and merge()) - branch(id(%s)), -rev)",
                 branch_rev, branch_rev):
                 abranch = repo.get_changeset(i).branch
                 if abranch not in peerbranches:
                     n = 'branch:%s:%s' % (abranch, repo.get_changeset(abranch).raw_id)
                     peers.append((n, abranch))
                     peerbranches.add(abranch)
 
         selected = None
         tiprev = repo.tags.get('tip')
         tipbranch = None
 
         branches = []
         for abranch, branchrev in repo.branches.iteritems():
             n = 'branch:%s:%s' % (abranch, branchrev)
             desc = abranch
             if branchrev == tiprev:
                 tipbranch = abranch
                 desc = '%s (current tip)' % desc
             branches.append((n, desc))
             if rev == branchrev:
                 selected = n
             if branch == abranch:
                 if not rev:
                     selected = n
                 branch = None
         if branch:  # branch not in list - it is probably closed
             branchrev = repo.closed_branches.get(branch)
             if branchrev:
                 n = 'branch:%s:%s' % (branch, branchrev)
                 branches.append((n, _('%s (closed)') % branch))
                 selected = n
                 branch = None
             if branch:
                 log.error('branch %r not found in %s', branch, repo)
 
         bookmarks = []
         for bookmark, bookmarkrev in repo.bookmarks.iteritems():
             n = 'book:%s:%s' % (bookmark, bookmarkrev)
             bookmarks.append((n, bookmark))
             if rev == bookmarkrev:
                 selected = n
 
         tags = []
         for tag, tagrev in repo.tags.iteritems():
             if tag == 'tip':
                 continue
             n = 'tag:%s:%s' % (tag, tagrev)
             tags.append((n, tag))
             if rev == tagrev:
                 selected = n
 
         # prio 1: rev was selected as existing entry above
 
         # prio 2: create special entry for rev; rev _must_ be used
         specials = []
         if rev and selected is None:
             selected = 'rev:%s:%s' % (rev, rev)
             specials = [(selected, '%s: %s' % (_("Changeset"), rev[:12]))]
 
         # prio 3: most recent peer branch
         if peers and not selected:
             selected = peers[0][0]
 
         # prio 4: tip revision
         if not selected:
             if h.is_hg(repo):
                 if tipbranch:
                     selected = 'branch:%s:%s' % (tipbranch, tiprev)
                 else:
-                    selected = 'tag:null:0'
+                    selected = 'tag:null:' + repo.EMPTY_CHANGESET
                     tags.append((selected, 'null'))
             else:
                 if 'master' in repo.branches:
                     selected = 'branch:master:%s' % repo.branches['master']
                 else:
                     k, v = repo.branches.items()[0]
                     selected = 'branch:%s:%s' % (k, v)
 
         groups = [(specials, _("Special")),
                   (peers, _("Peer branches")),
                   (bookmarks, _("Bookmarks")),
                   (branches, _("Branches")),
                   (tags, _("Tags")),
                   ]
         return [g for g in groups if g[0]], selected
 
     def _get_is_allowed_change_status(self, pull_request):
         if pull_request.is_closed():
             return False
 
         owner = self.authuser.user_id == pull_request.user_id
         reviewer = self.authuser.user_id in [x.user_id for x in
                                                    pull_request.reviewers]
         return self.authuser.admin or owner or reviewer
 
     @LoginRequired()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     def show_all(self, repo_name):
         c.from_ = request.GET.get('from_') or ''
         c.closed = request.GET.get('closed') or ''
         c.pull_requests = PullRequestModel().get_all(repo_name, from_=c.from_, closed=c.closed)
         c.repo_name = repo_name
         p = safe_int(request.GET.get('page', 1), 1)
 
         c.pullrequests_pager = Page(c.pull_requests, page=p, items_per_page=10)
 
         c.pullrequest_data = render('/pullrequests/pullrequest_data.html')
 
         if request.environ.get('HTTP_X_PARTIAL_XHR'):
             return c.pullrequest_data
 
         return render('/pullrequests/pullrequest_show_all.html')
 
     @LoginRequired()
     def show_my(self): # my_account_my_pullrequests
         c.show_closed = request.GET.get('pr_show_closed')
         return render('/pullrequests/pullrequest_show_my.html')
 
     @NotAnonymous()
     def show_my_data(self):
         c.show_closed = request.GET.get('pr_show_closed')
 
         def _filter(pr):
             s = sorted(pr, key=lambda o: o.created_on, reverse=True)
             if not c.show_closed:
                 s = filter(lambda p: p.status != PullRequest.STATUS_CLOSED, s)
             return s
 
         c.my_pull_requests = _filter(PullRequest.query()\
                                 .filter(PullRequest.user_id ==
                                         self.authuser.user_id)\
                                 .all())
 
         c.participate_in_pull_requests = _filter(PullRequest.query()\
                                 .join(PullRequestReviewers)\
                                 .filter(PullRequestReviewers.user_id ==
                                         self.authuser.user_id)\
                                                  )
 
         return render('/pullrequests/pullrequest_show_my_data.html')
 
     @LoginRequired()
     @NotAnonymous()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     def index(self):
         org_repo = c.db_repo
         org_scm_instance = org_repo.scm_instance
         try:
             org_scm_instance.get_changeset()
         except EmptyRepositoryError, e:
             h.flash(h.literal(_('There are no changesets yet')),
                     category='warning')
             redirect(url('summary_home', repo_name=org_repo.repo_name))
 
         org_rev = request.GET.get('rev_end')
         # rev_start is not directly useful - its parent could however be used
         # as default for other and thus give a simple compare view
         #other_rev = request.POST.get('rev_start')
         branch = request.GET.get('branch')
 
         c.cs_repos = [(org_repo.repo_name, org_repo.repo_name)]
         c.default_cs_repo = org_repo.repo_name
         c.cs_refs, c.default_cs_ref = self._get_repo_refs(org_scm_instance, rev=org_rev, branch=branch)
 
         # add org repo to other so we can open pull request against peer branches on itself
         c.a_repos = [(org_repo.repo_name, '%s (self)' % org_repo.repo_name)]
 
         # add parent of this fork also and select it
         if org_repo.parent:
             c.a_repos.append((org_repo.parent.repo_name, '%s (parent)' % org_repo.parent.repo_name))
             c.a_repo = org_repo.parent
             c.a_refs, c.default_a_ref = self._get_repo_refs(org_repo.parent.scm_instance)
         else:
             c.a_repo = org_repo
             c.a_refs, c.default_a_ref = self._get_repo_refs(org_scm_instance) # without rev and branch
 
         # gather forks and add to this list ... even though it is rare to
         # request forks to pull from their parent
         for fork in org_repo.forks:
             c.a_repos.append((fork.repo_name, fork.repo_name))
 
         return render('/pullrequests/pullrequest.html')
 
     @LoginRequired()
     @NotAnonymous()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     @jsonify
     def repo_info(self, repo_name):
         repo = RepoModel()._get_repo(repo_name)
         refs, selected_ref = self._get_repo_refs(repo.scm_instance)
         return {
             'description': repo.description.split('\n', 1)[0],
             'selected_ref': selected_ref,
             'refs': refs,
             'user': dict(user_id=repo.user.user_id,
                          username=repo.user.username,
                          firstname=repo.user.firstname,
                          lastname=repo.user.lastname,
                          gravatar_link=h.gravatar_url(repo.user.email, 14)),
             }
 
     @LoginRequired()
     @NotAnonymous()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     def create(self, repo_name):
         repo = RepoModel()._get_repo(repo_name)
         try:
             _form = PullRequestForm(repo.repo_id)().to_python(request.POST)
         except formencode.Invalid, errors:
             log.error(traceback.format_exc())
             log.error(str(errors))
             msg = _('Error creating pull request: %s') % errors.msg
             h.flash(msg, 'error')
             raise HTTPBadRequest
 
         # heads up: org and other might seem backward here ...
         org_repo_name = _form['org_repo']
         org_ref = _form['org_ref'] # will have merge_rev as rev but symbolic name
         org_repo = RepoModel()._get_repo(org_repo_name)
         (org_ref_type,
          org_ref_name,
          org_rev) = org_ref.split(':')
 
         other_repo_name = _form['other_repo']
         other_ref = _form['other_ref'] # will have symbolic name and head revision
         other_repo = RepoModel()._get_repo(other_repo_name)
         (other_ref_type,
          other_ref_name,
          other_rev) = other_ref.split(':')
 
         cs_ranges, _cs_ranges_not, ancestor_rev = \
             CompareController._get_changesets(org_repo.scm_instance.alias,
                                               other_repo.scm_instance, other_rev, # org and other "swapped"
                                               org_repo.scm_instance, org_rev,
                                               )
         revisions = [cs.raw_id for cs in cs_ranges]
 
         # hack: ancestor_rev is not an other_rev but we want to show the
         # requested destination and have the exact ancestor
         other_ref = '%s:%s:%s' % (other_ref_type, other_ref_name, ancestor_rev)
 
         reviewers = _form['review_members']
 
         title = _form['pullrequest_title']
         if not title:
             title = '%s#%s to %s#%s' % (org_repo_name, h.short_ref(org_ref_type, org_ref_name),
                                         other_repo_name, h.short_ref(other_ref_type, other_ref_name))
         description = _form['pullrequest_desc'].strip() or _('No description')
         try:
             pull_request = PullRequestModel().create(
                 self.authuser.user_id, org_repo_name, org_ref, other_repo_name,
                 other_ref, revisions, reviewers, title, description
             )
             Session().commit()
             h.flash(_('Successfully opened new pull request'),
                     category='success')
         except Exception:
             h.flash(_('Error occurred while creating pull request'),
                     category='error')
             log.error(traceback.format_exc())
             return redirect(url('pullrequest_home', repo_name=repo_name))
 
         return redirect(pull_request.url())
 
     @LoginRequired()
     @NotAnonymous()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     def copy_update(self, repo_name, pull_request_id):
         old_pull_request = PullRequest.get_or_404(pull_request_id)
         assert old_pull_request.other_repo.repo_name == repo_name
         if old_pull_request.is_closed():
             raise HTTPForbidden()
 
         org_repo = RepoModel()._get_repo(old_pull_request.org_repo.repo_name)
         org_ref_type, org_ref_name, org_rev = old_pull_request.org_ref.split(':')
         updaterev = request.POST.get('updaterev')
         if updaterev:
             new_org_rev = self._get_ref_rev(org_repo, 'rev', updaterev)
         else:
             # assert org_ref_type == 'branch', org_ref_type # TODO: what if not?
             new_org_rev = self._get_ref_rev(org_repo, org_ref_type, org_ref_name)
 
         other_repo = RepoModel()._get_repo(old_pull_request.other_repo.repo_name)
         other_ref_type, other_ref_name, other_rev = old_pull_request.other_ref.split(':') # other_rev is ancestor
         #assert other_ref_type == 'branch', other_ref_type # TODO: what if not?
         new_other_rev = self._get_ref_rev(other_repo, other_ref_type, other_ref_name)
 
         cs_ranges, _cs_ranges_not, ancestor_rev = CompareController._get_changesets(org_repo.scm_instance.alias,
             other_repo.scm_instance, new_other_rev, # org and other "swapped"
             org_repo.scm_instance, new_org_rev)
 
         old_revisions = set(old_pull_request.revisions)
         revisions = [cs.raw_id for cs in cs_ranges]
         new_revisions = [r for r in revisions if r not in old_revisions]
         lost = old_revisions.difference(revisions)
 
         infos = ['','', 'This is an update of %s "%s".' %
                  (h.canonical_url('pullrequest_show', repo_name=old_pull_request.other_repo.repo_name,
                       pull_request_id=pull_request_id),
                   old_pull_request.title)]
 
         if lost:
             infos.append(_('Missing changesets since the previous version:'))
             for r in old_pull_request.revisions:
                 if r in lost:
                     desc = org_repo.get_changeset(r).message.split('\n')[0]
                     infos.append('  %s "%s"' % (h.short_id(r), desc))
 
         if new_revisions:
             infos.append(_('New changesets on %s %s since the previous version:') % (org_ref_type, org_ref_name))
             for r in reversed(revisions):
                 if r in new_revisions:
                     desc = org_repo.get_changeset(r).message.split('\n')[0]
                     infos.append('  %s %s' % (h.short_id(r), h.shorter(desc, 80)))
 
             if ancestor_rev == other_rev:
                 infos.append(_("Ancestor didn't change - show diff since previous version:"))
                 infos.append(h.canonical_url('compare_url',
                                  repo_name=org_repo.repo_name, # other_repo is always same as repo_name
                                  org_ref_type='rev', org_ref_name=h.short_id(org_rev), # use old org_rev as base
                                  other_ref_type='rev', other_ref_name=h.short_id(new_org_rev),
                                  )) # note: linear diff, merge or not doesn't matter
             else:
                 infos.append(_('This pull request is based on another %s revision and there is no simple diff.') % other_ref_name)
         else:
            infos.append(_('No changes found on %s %s since previous version.') % (org_ref_type, org_ref_name))
            # TODO: fail?
 
         # hack: ancestor_rev is not an other_ref but we want to show the
         # requested destination and have the exact ancestor
         new_other_ref = '%s:%s:%s' % (other_ref_type, other_ref_name, ancestor_rev)
         new_org_ref = '%s:%s:%s' % (org_ref_type, org_ref_name, new_org_rev)
 
         reviewers = [r.user_id for r in old_pull_request.reviewers]
         try:
             old_title, old_v = re.match(r'(.*)\(v(\d+)\)\s*$', old_pull_request.title).groups()
             v = int(old_v) + 1
         except (AttributeError, ValueError):
             old_title = old_pull_request.title
             v = 2
         title = '%s (v%s)' % (old_title.strip(), v)
         description = (old_pull_request.description.rstrip() +
                        '\n'.join(infos))
 
         try:
             pull_request = PullRequestModel().create(
                 self.authuser.user_id,
                 old_pull_request.org_repo.repo_name, new_org_ref,
                 old_pull_request.other_repo.repo_name, new_other_ref,
                 revisions, reviewers, title, description
             )
         except Exception:
             h.flash(_('Error occurred while creating pull request'),
                     category='error')
             log.error(traceback.format_exc())
             return redirect(old_pull_request.url())
 
         ChangesetCommentsModel().create(
             text=_('Closed, replaced by %s .') % h.canonical_url('pullrequest_show',
                                                    repo_name=old_pull_request.other_repo.repo_name,
                                                    pull_request_id=pull_request.pull_request_id),
             repo=old_pull_request.other_repo.repo_id,
             user=c.authuser.user_id,
             pull_request=pull_request_id,
             closing_pr=True)
         PullRequestModel().close_pull_request(pull_request_id)
 
         Session().commit()
         h.flash(_('Pull request update created'),
                 category='success')
 
         return redirect(pull_request.url())
 
     # pullrequest_post for PR editing
     @LoginRequired()
     @NotAnonymous()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     def post(self, repo_name, pull_request_id):
         repo = RepoModel()._get_repo(repo_name)
         pull_request = PullRequest.get_or_404(pull_request_id)
         old_description = pull_request.description
 
         _form = PullRequestPostForm()().to_python(request.POST)
 
         pull_request.title = _form['pullrequest_title']
         pull_request.description = _form['pullrequest_desc'].strip() or _('No description')
 
         PullRequestModel().mention_from_description(pull_request, old_description)
 
         Session().commit()
         h.flash(_('Pull request updated'), category='success')
 
         return redirect(pull_request.url())
 
     # pullrequest_update for updating reviewer list
     @LoginRequired()
     @NotAnonymous()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     @jsonify
     def update(self, repo_name, pull_request_id):
         pull_request = PullRequest.get_or_404(pull_request_id)
         if pull_request.is_closed():
             raise HTTPForbidden()
         #only owner or admin can update it
         owner = pull_request.author.user_id == c.authuser.user_id
         repo_admin = h.HasRepoPermissionAny('repository.admin')(c.repo_name)
         if h.HasPermissionAny('hg.admin') or repo_admin or owner:
             reviewers_ids = map(int, filter(lambda v: v not in [None, ''],
                 request.POST.get('reviewers_ids', '').split(',')))
 
             PullRequestModel().update_reviewers(pull_request_id, reviewers_ids)
             Session().commit()
             return True
         raise HTTPForbidden()
 
     @LoginRequired()
     @NotAnonymous()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     @jsonify
     def delete(self, repo_name, pull_request_id):
         pull_request = PullRequest.get_or_404(pull_request_id)
         #only owner can delete it !
         if pull_request.author.user_id == c.authuser.user_id:
             PullRequestModel().delete(pull_request)
             Session().commit()
             h.flash(_('Successfully deleted pull request'),
                     category='success')
             return redirect(url('my_pullrequests'))
         raise HTTPForbidden()
 
     @LoginRequired()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     def show(self, repo_name, pull_request_id, extra=None):
         repo_model = RepoModel()
         c.users_array = repo_model.get_users_js()
         c.user_groups_array = repo_model.get_user_groups_js()
         c.pull_request = PullRequest.get_or_404(pull_request_id)
         c.allowed_to_change_status = self._get_is_allowed_change_status(c.pull_request)
         cc_model = ChangesetCommentsModel()
         cs_model = ChangesetStatusModel()
 
         # pull_requests repo_name we opened it against
         # ie. other_repo must match
         if repo_name != c.pull_request.other_repo.repo_name:
             raise HTTPNotFound
 
         # load compare data into template context
         c.cs_repo = c.pull_request.org_repo
         (c.cs_ref_type,
          c.cs_ref_name,
          c.cs_rev) = c.pull_request.org_ref.split(':')
 
         c.a_repo = c.pull_request.other_repo
         (c.a_ref_type,
          c.a_ref_name,
          c.a_rev) = c.pull_request.other_ref.split(':') # other_rev is ancestor
 
         org_scm_instance = c.cs_repo.scm_instance # property with expensive cache invalidation check!!!
         c.cs_repo = c.cs_repo
         c.cs_ranges = [org_scm_instance.get_changeset(x) for x in c.pull_request.revisions]
         c.cs_ranges_org = None # not stored and not important and moving target - could be calculated ...
         revs = [ctx.revision for ctx in reversed(c.cs_ranges)]
         c.jsdata = json.dumps(graph_data(org_scm_instance, revs))
 
         c.available = []
         c.cs_branch_name = c.cs_ref_name
         other_scm_instance = c.a_repo.scm_instance
         c.update_msg = ""
         c.update_msg_other = ""
         if org_scm_instance.alias == 'hg' and c.a_ref_name != 'ancestor':
             if c.cs_ref_type != 'branch':
                 c.cs_branch_name = org_scm_instance.get_changeset(c.cs_ref_name).branch # use ref_type ?
             other_branch_name = c.a_ref_name
             if c.a_ref_type != 'branch':
                 try:
                     other_branch_name = other_scm_instance.get_changeset(c.a_ref_name).branch # use ref_type ?
                 except EmptyRepositoryError:
                     other_branch_name = 'null' # not a branch name ... but close enough
             # candidates: descendants of old head that are on the right branch
             #             and not are the old head itself ...
             #             and nothing at all if old head is a descendent of target ref name
             if other_scm_instance._repo.revs('present(%s)::&%s', c.cs_ranges[-1].raw_id, other_branch_name):
                 c.update_msg = _('This pull request has already been merged to %s.') % other_branch_name
             else: # look for children of PR head on source branch in org repo
                 arevs = org_scm_instance._repo.revs('%s:: & branch(%s) - %s',
                                                     revs[0], c.cs_branch_name, revs[0])
                 if arevs:
                     if c.pull_request.is_closed():
                         c.update_msg = _('This pull request has been closed and can not be updated with descendent changes on %s:') % c.cs_branch_name
                     else:
                         c.update_msg = _('This pull request can be updated with descendent changes on %s:') % c.cs_branch_name
                     c.available = [org_scm_instance.get_changeset(x) for x in arevs]
                 else:
                     c.update_msg = _('No changesets found for updating this pull request.')
 
             revs = org_scm_instance._repo.revs('head() & not (%s::) & branch(%s) & !closed()', revs[0], c.cs_branch_name)
             if revs:
                 c.update_msg_other = _('Note: Branch %s also contains unrelated changes, such as %s.') % (c.cs_branch_name,
                     h.short_id(org_scm_instance.get_changeset((max(revs))).raw_id))
             else:
                 c.update_msg_other = _('Branch %s does not contain other changes.') % c.cs_branch_name
         elif org_scm_instance.alias == 'git':
             c.update_msg = _("Git pull requests don't support updates yet.")
 
         raw_ids = [x.raw_id for x in c.cs_ranges]
         c.cs_comments = c.cs_repo.get_comments(raw_ids)
         c.statuses = c.cs_repo.statuses(raw_ids)
 
         ignore_whitespace = request.GET.get('ignorews') == '1'
         line_context = request.GET.get('context', 3)
         c.ignorews_url = _ignorews_url
         c.context_url = _context_url
         c.fulldiff = request.GET.get('fulldiff')
         diff_limit = self.cut_off_limit if not c.fulldiff else None
 
         # we swap org/other ref since we run a simple diff on one repo
         log.debug('running diff between %s and %s in %s'
                   % (c.a_rev, c.cs_rev, org_scm_instance.path))
         txtdiff = org_scm_instance.get_diff(rev1=safe_str(c.a_rev), rev2=safe_str(c.cs_rev),
                                       ignore_whitespace=ignore_whitespace,
                                       context=line_context)
 
         diff_processor = diffs.DiffProcessor(txtdiff or '', format='gitdiff',
                                              diff_limit=diff_limit)
         _parsed = diff_processor.prepare()
 
         c.limited_diff = False
         if isinstance(_parsed, LimitedDiffContainer):
             c.limited_diff = True
 
         c.files = []
         c.changes = {}
         c.lines_added = 0
         c.lines_deleted = 0
 
         for f in _parsed:
             st = f['stats']
             c.lines_added += st['added']
             c.lines_deleted += st['deleted']
             fid = h.FID('', f['filename'])
             c.files.append([fid, f['operation'], f['filename'], f['stats']])
             htmldiff = diff_processor.as_html(enable_comments=True,
                                               parsed_lines=[f])
             c.changes[fid] = [f['operation'], f['filename'], htmldiff]
 
         # inline comments
         c.inline_cnt = 0
         c.inline_comments = cc_model.get_inline_comments(
                                 c.db_repo.repo_id,
                                 pull_request=pull_request_id)
         # count inline comments
         for __, lines in c.inline_comments:
             for comments in lines.values():
                 c.inline_cnt += len(comments)
         # comments
         c.comments = cc_model.get_comments(c.db_repo.repo_id,
                                            pull_request=pull_request_id)
 
         # (badly named) pull-request status calculation based on reviewer votes
         (c.pull_request_reviewers,
          c.pull_request_pending_reviewers,
          c.current_voting_result,
          ) = cs_model.calculate_pull_request_result(c.pull_request)
         c.changeset_statuses = ChangesetStatus.STATUSES
 
         c.as_form = False
         c.ancestor = None # there is one - but right here we don't know which
         return render('/pullrequests/pullrequest_show.html')
 
     @LoginRequired()
     @NotAnonymous()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     @jsonify
     def comment(self, repo_name, pull_request_id):
         pull_request = PullRequest.get_or_404(pull_request_id)
 
         status = 0
         close_pr = False
         allowed_to_change_status = self._get_is_allowed_change_status(pull_request)
         if allowed_to_change_status:
             status = request.POST.get('changeset_status')
             close_pr = request.POST.get('save_close')
         text = request.POST.get('text', '').strip() or _('No comments.')
         if close_pr:
             text = _('Closing.') + '\n' + text
 
         comm = ChangesetCommentsModel().create(
             text=text,
             repo=c.db_repo.repo_id,
             user=c.authuser.user_id,
             pull_request=pull_request_id,
             f_path=request.POST.get('f_path'),
             line_no=request.POST.get('line'),
             status_change=(ChangesetStatus.get_status_lbl(status)
                            if status and allowed_to_change_status else None),
             closing_pr=close_pr
         )
 
         action_logger(self.authuser,
                       'user_commented_pull_request:%s' % pull_request_id,
                       c.db_repo, self.ip_addr, self.sa)
 
         if allowed_to_change_status:
             # get status if set !
             if status:
                 ChangesetStatusModel().set_status(
                     c.db_repo.repo_id,
                     status,
                     c.authuser.user_id,
                     comm,
                     pull_request=pull_request_id
                 )
 
             if close_pr:
                 PullRequestModel().close_pull_request(pull_request_id)
                 action_logger(self.authuser,
                               'user_closed_pull_request:%s' % pull_request_id,
                               c.db_repo, self.ip_addr, self.sa)
 
         Session().commit()
 
         if not request.environ.get('HTTP_X_PARTIAL_XHR'):
             return redirect(pull_request.url())
 
         data = {
            'target_id': h.safeid(h.safe_unicode(request.POST.get('f_path'))),
         }
         if comm:
             c.co = comm
             data.update(comm.get_dict())
             data.update({'rendered_text':
                          render('changeset/changeset_comment_block.html')})
 
         return data
 
     @LoginRequired()
     @NotAnonymous()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     @jsonify
     def delete_comment(self, repo_name, comment_id):
         co = ChangesetComment.get(comment_id)
         if co.pull_request.is_closed():
             #don't allow deleting comments on closed pull request
             raise HTTPForbidden()
 
         owner = co.author.user_id == c.authuser.user_id
         repo_admin = h.HasRepoPermissionAny('repository.admin')(c.repo_name)
         if h.HasPermissionAny('hg.admin') or repo_admin or owner:
             ChangesetCommentsModel().delete(comment=co)
             Session().commit()
             return True
         else:
             raise HTTPForbidden()