# -*- 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.branches

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

branches controller for rhodecode

:created_on: Apr 21, 2010

:author: marcink

:copyright: (c) 2013 RhodeCode GmbH.

:license: GPLv3, see LICENSE for more details.

"""

import logging

import binascii

from pylons import tmpl_context as c

from kallithea.lib.auth import LoginRequired, HasRepoPermissionAnyDecorator

from kallithea.lib.base import BaseRepoController, render

from kallithea.lib.compat import OrderedDict

from kallithea.lib.utils2 import safe_unicode

log = logging.getLogger(__name__)

class BranchesController(BaseRepoController):

    def __before__(self):

        super(BranchesController, self).__before__()

    @LoginRequired()

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    def index(self):

        def _branchtags(localrepo):

            bt_closed = {}

            for bn, heads in localrepo.branchmap().iteritems():

                tip = heads[-1]

                if 'close' in localrepo.changelog.read(tip)[5]:

                    bt_closed[bn] = tip

            return bt_closed

        cs_g = c.rhodecode_repo.get_changeset

        c.repo_closed_branches = {}

            bt_closed = _branchtags(c.rhodecode_repo._repo)

            _closed_branches = [(safe_unicode(n), cs_g(binascii.hexlify(h)),)

                                for n, h in bt_closed.items()]

            c.repo_closed_branches = OrderedDict(sorted(_closed_branches,

                                                    key=lambda ctx: ctx[0],

                                                    reverse=False))

        _branches = [(safe_unicode(n), cs_g(h))

                     for n, h in c.rhodecode_repo.branches.items()]

        c.repo_branches = OrderedDict(sorted(_branches,

                                             key=lambda ctx: ctx[0],

                                             reverse=False))

        return render('branches/branches.html')

# -*- 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.changelog

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

changelog controller for rhodecode

:created_on: Apr 21, 2010

:author: marcink

:copyright: (c) 2013 RhodeCode GmbH.

:license: GPLv3, see LICENSE for more details.

"""

import logging

import traceback

from pylons import request, url, session, tmpl_context as c

from pylons.controllers.util import redirect

from pylons.i18n.translation import _

from webob.exc import HTTPNotFound, HTTPBadRequest

import kallithea.lib.helpers as h

from kallithea.lib.auth import LoginRequired, HasRepoPermissionAnyDecorator

from kallithea.lib.base import BaseRepoController, render

from kallithea.lib.helpers import RepoPage

from kallithea.lib.compat import json

from kallithea.lib.graphmod import _colored, _dagwalker

from kallithea.lib.vcs.exceptions import RepositoryError, ChangesetDoesNotExistError,\

    ChangesetError, NodeDoesNotExistError, EmptyRepositoryError

from kallithea.lib.utils2 import safe_int, safe_str

log = logging.getLogger(__name__)

def _load_changelog_summary():

    p = safe_int(request.GET.get('page'), 1)

    size = safe_int(request.GET.get('size'), 10)

    def url_generator(**kw):

        return url('changelog_summary_home',

    collection = c.rhodecode_repo

    c.repo_changesets = RepoPage(collection, page=p,

                                 items_per_page=size,

                                 url=url_generator)

    page_revisions = [x.raw_id for x in list(c.repo_changesets)]

class ChangelogController(BaseRepoController):

    def __before__(self):

        super(ChangelogController, self).__before__()

        c.affected_files_cut_off = 60

    def __get_cs_or_redirect(self, rev, repo, redirect_after=True,

                             partial=False):

        """

        Safe way to get changeset if error occur it redirects to changeset with

        proper message. If partial is set then don't do redirect raise Exception

        instead

        :param rev: revision to fetch

        :param repo: repo instance

        """

        try:

            return c.rhodecode_repo.get_changeset(rev)

        except EmptyRepositoryError, e:

            if not redirect_after:

                return None

            h.flash(h.literal(_('There are no changesets yet')),

                    category='warning')

            redirect(url('changelog_home', repo_name=repo.repo_name))

        except RepositoryError, e:

            log.error(traceback.format_exc())

            h.flash(safe_str(e), category='warning')

            if not partial:

                redirect(h.url('changelog_home', repo_name=repo.repo_name))

            raise HTTPBadRequest()

    def _graph(self, repo, revs_int, repo_size, size, p):

        """

        Generates a DAG graph for repo

        :param repo:

        :param revs_int:

        :param repo_size:

        :param size:

        :param p:

        """

        if not revs_int:

            c.jsdata = json.dumps([])

            return

        data = []

        revs = revs_int

        dag = _dagwalker(repo, revs, repo.alias)

        dag = _colored(dag)

        for (_id, _type, ctx, vtx, edges) in dag:

            data.append(['', vtx, edges])

        c.jsdata = json.dumps(data)

    @LoginRequired()

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    def index(self, repo_name, revision=None, f_path=None):

        limit = 100

        default = 20

        if request.GET.get('size'):

            c.size = max(min(safe_int(request.GET.get('size')), limit), 1)

            session['changelog_size'] = c.size

            session.save()

        else:

            c.size = int(session.get('changelog_size', default))

        # min size must be 1

        c.size = max(c.size, 1)

        p = safe_int(request.GET.get('page', 1), 1)

        branch_name = request.GET.get('branch', None)

        if (branch_name and

            branch_name not in c.rhodecode_repo.branches and

            branch_name not in c.rhodecode_repo.closed_branches and

            not revision):

            return redirect(url('changelog_file_home', repo_name=c.repo_name,

                                    revision=branch_name, f_path=f_path or ''))

        c.changelog_for_path = f_path

        try:

            if f_path:

                log.debug('generating changelog for path %s' % f_path)

                # get the history for the file !

                tip_cs = c.rhodecode_repo.get_changeset()

                try:

                    collection = tip_cs.get_file_history(f_path)

                except (NodeDoesNotExistError, ChangesetError):

                    #this node is not present at tip !

                    try:

                        cs = self.__get_cs_or_redirect(revision, repo_name)

                        collection = cs.get_file_history(f_path)

                    except RepositoryError, e:

                        h.flash(safe_str(e), category='warning')

                        redirect(h.url('changelog_home', repo_name=repo_name))

                collection = list(reversed(collection))

            else:

                collection = c.rhodecode_repo.get_changesets(start=0,

                                                        branch_name=branch_name)

            c.total_cs = len(collection)

            c.pagination = RepoPage(collection, page=p, item_count=c.total_cs,

                                    items_per_page=c.size, branch=branch_name,)

            collection = list(c.pagination)

            page_revisions = [x.raw_id for x in c.pagination]

        except (EmptyRepositoryError), e:

            h.flash(safe_str(e), category='warning')

            return redirect(url('summary_home', repo_name=c.repo_name))

        except (RepositoryError, ChangesetDoesNotExistError, Exception), e:

            log.error(traceback.format_exc())

            h.flash(safe_str(e), category='error')

            return redirect(url('changelog_home', repo_name=c.repo_name))

        c.branch_name = branch_name

        c.branch_filters = [('', _('All Branches'))] + \

            [(k, k) for k in c.rhodecode_repo.branches.keys()]

        if c.rhodecode_repo.closed_branches:

            prefix = _('(closed)') + ' '

            c.branch_filters += [('-', '-')] + \

                [(k, prefix + k) for k in c.rhodecode_repo.closed_branches.keys()]

        _revs = []

        if not f_path:

            _revs = [x.revision for x in c.pagination]

        self._graph(c.rhodecode_repo, _revs, c.total_cs, c.size, p)

        return render('changelog/changelog.html')

    @LoginRequired()

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    def changelog_details(self, cs):

        if request.environ.get('HTTP_X_PARTIAL_XHR'):

            c.cs = c.rhodecode_repo.get_changeset(cs)

            return render('changelog/changelog_details.html')

        raise HTTPNotFound()

    @LoginRequired()

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    def changelog_summary(self, repo_name):

        if request.environ.get('HTTP_X_PARTIAL_XHR'):

            _load_changelog_summary()

            return render('changelog/changelog_summary_data.html')

        raise HTTPNotFound()

    """

    Generates url for context lines

    :param fileid:

    """

    fileid = str(fileid) if fileid else None

    ig_ws = get_ignore_ws(fileid, GET)

    ln_ctx = (get_line_ctx(fileid, GET) or 3) * 2

    params = defaultdict(list)

    _update_with_GET(params, GET)

    # global option

    if fileid is None:

        if ln_ctx > 0:

            params['context'] += [ln_ctx]

        if ig_ws:

            ig_ws_key = 'ignorews'

            ig_ws_val = 1

    # per file option

    else:

        params[fileid] += ['C:%s' % ln_ctx]

        ig_ws_key = fileid

        ig_ws_val = 'WS:%s' % 1

    if ig_ws:

        params[ig_ws_key] += [ig_ws_val]

    lbl = _('increase diff context to %(num)s lines') % {'num': ln_ctx}

    params['anchor'] = fileid

    img = h.image(h.url('/images/icons/table_add.png'), lbl, class_='icon')

    return h.link_to(img, h.url.current(**params), title=lbl, class_='tooltip')

class ChangesetController(BaseRepoController):

    def __before__(self):

        super(ChangesetController, self).__before__()

        c.affected_files_cut_off = 60

    def __load_data(self):

        repo_model = RepoModel()

        c.users_array = repo_model.get_users_js()

        c.user_groups_array = repo_model.get_user_groups_js()

    def _index(self, revision, method):

        c.anchor_url = anchor_url

        c.ignorews_url = _ignorews_url

        c.context_url = _context_url

        c.fulldiff = fulldiff = request.GET.get('fulldiff')

        #get ranges of revisions if preset

        rev_range = revision.split('...')[:2]

        enable_comments = True

        try:

            if len(rev_range) == 2:

                enable_comments = False

                rev_start = rev_range[0]

                rev_end = rev_range[1]

                rev_ranges = c.rhodecode_repo.get_changesets(start=rev_start,

                                                             end=rev_end)

            else:

                rev_ranges = [c.rhodecode_repo.get_changeset(revision)]

            c.cs_ranges = list(rev_ranges)

            if not c.cs_ranges:

                raise RepositoryError('Changeset range returned empty result')

        except(ChangesetDoesNotExistError,), e:

            log.error(traceback.format_exc())

            msg = _('Such revision does not exist for this repository')

            h.flash(msg, category='error')

            raise HTTPNotFound()

        except (Exception,), e:

            log.error(traceback.format_exc())

            raise HTTPNotFound()

        c.changes = OrderedDict()

        c.lines_added = 0  # count of lines added

        c.lines_deleted = 0  # count of lines removes

        c.changeset_statuses = ChangesetStatus.STATUSES

        c.comments = []

        c.statuses = []

        c.inline_comments = []

        c.inline_cnt = 0

        # Iterate over ranges (default changeset view is always one changeset)

        for changeset in c.cs_ranges:

            inlines = []

            if method == 'show':

                c.statuses.extend([ChangesetStatusModel().get_status(

                c.comments.extend(ChangesetCommentsModel()\

                                                revision=changeset.raw_id))

                #comments from PR

                st = ChangesetStatusModel().get_statuses(

                            with_revisions=True)

                # from associated statuses, check the pull requests, and

                # show comments from them

                prs = set([x.pull_request for x in

                           filter(lambda x: x.pull_request is not None, st)])

                for pr in prs:

                    c.comments.extend(pr.comments)

                inlines = ChangesetCommentsModel()\

                                                 revision=changeset.raw_id)

                c.inline_comments.extend(inlines)

            c.changes[changeset.raw_id] = []

            cs2 = changeset.raw_id

            cs1 = changeset.parents[0].raw_id if changeset.parents else EmptyChangeset().raw_id

            context_lcl = get_line_ctx('', request.GET)

            ign_whitespace_lcl = ign_whitespace_lcl = get_ignore_ws('', request.GET)

            _diff = c.rhodecode_repo.get_diff(cs1, cs2,

                ignore_whitespace=ign_whitespace_lcl, context=context_lcl)

            diff_limit = self.cut_off_limit if not fulldiff else None

            diff_processor = diffs.DiffProcessor(_diff,

                                                 vcs=c.rhodecode_repo.alias,

                                                 format='gitdiff',

                                                 diff_limit=diff_limit)

            cs_changes = OrderedDict()

            if method == 'show':

                _parsed = diff_processor.prepare()

                c.limited_diff = False

                if isinstance(_parsed, LimitedDiffContainer):

                    c.limited_diff = True

                for f in _parsed:

                    st = f['stats']

                    c.lines_added += st['added']

                    c.lines_deleted += st['deleted']

                    fid = h.FID(changeset.raw_id, f['filename'])

                    diff = diff_processor.as_html(enable_comments=enable_comments,

                                                  parsed_lines=[f])

                    cs_changes[fid] = [cs1, cs2, f['operation'], f['filename'],

                                       diff, st]

            else:

                # downloads/raw we only need RAW diff nothing else

                diff = diff_processor.as_raw()

                cs_changes[''] = [None, None, None, None, diff, None]

            c.changes[changeset.raw_id] = cs_changes

        #sort comments by how they were generated

        c.comments = sorted(c.comments, key=lambda x: x.comment_id)

        # count inline comments

        for __, lines in c.inline_comments:

            for comments in lines.values():

                c.inline_cnt += len(comments)

        if len(c.cs_ranges) == 1:

            c.changeset = c.cs_ranges[0]

            c.parent_tmpl = ''.join(['# Parent  %s\n' % x.raw_id

                                     for x in c.changeset.parents])

        if method == 'download':

            response.content_type = 'text/plain'

            response.content_disposition = 'attachment; filename=%s.diff' \

                                            % revision[:12]

            return diff

        elif method == 'patch':

            response.content_type = 'text/plain'

            c.diff = safe_unicode(diff)

            return render('changeset/patch_changeset.html')

        elif method == 'raw':

            response.content_type = 'text/plain'

            return diff

        elif method == 'show':

            self.__load_data()

            if len(c.cs_ranges) == 1:

                return render('changeset/changeset.html')

            else:

                return render('changeset/changeset_range.html')

    @LoginRequired()

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    def index(self, revision, method='show'):

        return self._index(revision, method=method)

    @LoginRequired()

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    def changeset_raw(self, revision):

        return self._index(revision, method='raw')

    @LoginRequired()

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    def changeset_patch(self, revision):

        return self._index(revision, method='patch')

    @LoginRequired()

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    def changeset_download(self, revision):

        return self._index(revision, method='download')

    @LoginRequired()

    @NotAnonymous()

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    @jsonify

    def comment(self, repo_name, revision):

        status = request.POST.get('changeset_status')

        change_status = request.POST.get('change_changeset_status')

        text = request.POST.get('text')

        if status and change_status:

            text = text or (_('Status change -> %s')

                            % ChangesetStatus.get_status_lbl(status))

        c.co = comm = ChangesetCommentsModel().create(

            text=text,

            user=c.rhodecode_user.user_id,

            revision=revision,

            f_path=request.POST.get('f_path'),

            line_no=request.POST.get('line'),

            status_change=(ChangesetStatus.get_status_lbl(status)

                           if status and change_status else None)

        )

        # get status if set !

        if status and change_status:

            # if latest status was from pull request and it's closed

            # disallow changing status !

            # dont_allow_on_closed_pull_request = True !

            try:

                ChangesetStatusModel().set_status(

                    status,

                    c.rhodecode_user.user_id,

                    comm,

                    revision=revision,

                    dont_allow_on_closed_pull_request=True

                )

            except StatusChangeOnClosedPullRequestError:

                log.error(traceback.format_exc())

                msg = _('Changing status on a changeset associated with '

                        'a closed pull request is not allowed')

                h.flash(msg, category='warning')

                return redirect(h.url('changeset_home', repo_name=repo_name,

                                      revision=revision))

        action_logger(self.rhodecode_user,

                      'user_commented_revision:%s' % revision,

        Session().commit()

        if not request.environ.get('HTTP_X_PARTIAL_XHR'):

            return redirect(h.url('changeset_home', repo_name=repo_name,

                                  revision=revision))

        #only ajax below

        data = {

           'target_id': h.safeid(h.safe_unicode(request.POST.get('f_path'))),

        }

        if 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')

    def preview_comment(self):

        if not request.environ.get('HTTP_X_PARTIAL_XHR'):

            raise HTTPBadRequest()

        text = request.POST.get('text')

        if text:

            return h.rst_w_mentions(text)

        return ''

    @LoginRequired()

    @NotAnonymous()

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    @jsonify

    def delete_comment(self, repo_name, comment_id):

        co = ChangesetComment.get(comment_id)

        owner = co.author.user_id == c.rhodecode_user.user_id

        repo_admin = h.HasRepoPermissionAny('repository.admin')

        if h.HasPermissionAny('hg.admin')() or repo_admin or owner:

            ChangesetCommentsModel().delete(comment=co)

            Session().commit()

            return True

        else:

            raise HTTPForbidden()

    @LoginRequired()

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    @jsonify

    def changeset_info(self, repo_name, revision):

        if request.is_xhr:

            try:

                return c.rhodecode_repo.get_changeset(revision)

            except ChangesetDoesNotExistError, e:

                return EmptyChangeset(message=str(e))

        else:

            raise HTTPBadRequest()

    @LoginRequired()

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    @jsonify

    def changeset_children(self, repo_name, revision):

        if request.is_xhr:

            changeset = c.rhodecode_repo.get_changeset(revision)

            result = {"results": []}

            if changeset.children:

                result = {"results": changeset.children}

            return result

        else:

            raise HTTPBadRequest()

    @LoginRequired()

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    @jsonify

    def changeset_parents(self, repo_name, revision):

        if request.is_xhr:

            changeset = c.rhodecode_repo.get_changeset(revision)

            result = {"results": []}

            if changeset.parents:

                result = {"results": changeset.parents}

            return result

        else:

            raise HTTPBadRequest()

        except RepositoryError, e:

            log.error(traceback.format_exc())

            h.flash(safe_str(e), category='warning')

            if not partial:

                redirect(h.url('summary_home', repo_name=repo.repo_name))

            raise HTTPBadRequest()

    def _get_changesets(self, alias, org_repo, org_rev, other_repo, other_rev, merge):

        """

        Returns a list of changesets that can be merged from org_repo at org_rev

        to other_repo at other_rev ... and the ancestor that would be used for merge.

        :param org_repo: repo object, that is most likely the orginal repo we forked from

        :param org_rev: the revision we want our compare to be made

        :param other_repo: repo object, mostl likely the fork of org_repo. It hass

            all changesets that we need to obtain

        :param other_rev: revision we want out compare to be made on other_repo

        """

        ancestor = None

        if org_rev == other_rev:

            changesets = []

            if merge:

                ancestor = org_rev

        elif alias == 'hg':

            #case two independent repos

            if org_repo != other_repo:

                hgrepo = unionrepo.unionrepository(other_repo.baseui,

                                                   other_repo.path,

                                                   org_repo.path)

                # all the changesets we are looking for will be in other_repo,

                # so rev numbers from hgrepo can be used in other_repo

            #no remote compare do it on the same repository

            else:

                hgrepo = other_repo._repo

            if merge:

                revs = hgrepo.revs(

                    "ancestors(id(%s)) and not ancestors(id(%s)) and not id(%s)",

                    other_rev, org_rev, org_rev)

                ancestors = hgrepo.revs("ancestor(id(%s), id(%s))", org_rev,

                                        other_rev)

                if ancestors:

                    # pick arbitrary ancestor - but there is usually only one

                    ancestor = hgrepo[ancestors[0]].hex()

            else:

                # TODO: have both + and - changesets

                revs = hgrepo.revs("id(%s) :: id(%s) - id(%s)",

                                   org_rev, other_rev, org_rev)

            changesets = [other_repo.get_changeset(rev) for rev in revs]

        elif alias == 'git':

            if org_repo != other_repo:

                from dulwich.repo import Repo

                from dulwich.client import SubprocessGitClient

                gitrepo = Repo(org_repo.path)

                SubprocessGitClient(thin_packs=False).fetch(other_repo.path, gitrepo)

                gitrepo_remote = Repo(other_repo.path)

                SubprocessGitClient(thin_packs=False).fetch(org_repo.path, gitrepo_remote)

                revs = []

                for x in gitrepo_remote.get_walker(include=[other_rev],

                                                   exclude=[org_rev]):

                    revs.append(x.commit.id)

                changesets = [other_repo.get_changeset(rev) for rev in reversed(revs)]

                if changesets:

                    ancestor = changesets[0].parents[0].raw_id

                else:

                    # no changesets from other repo, ancestor is the other_rev

                    ancestor = other_rev

            else:

                so, se = org_repo.run_git_command(

                    'log --reverse --pretty="format: %%H" -s %s..%s'

                        % (org_rev, other_rev)

                )

                changesets = [org_repo.get_changeset(cs)

                              for cs in re.findall(r'[0-9a-fA-F]{40}', so)]

        else:

            raise Exception('Bad alias only git and hg is allowed')

        return changesets, ancestor

    @LoginRequired()

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    def index(self, repo_name):

        c.compare_home = True

        other_repo = request.GET.get('other_repo', org_repo)

        c.org_repo = Repository.get_by_repo_name(org_repo)

        c.other_repo = Repository.get_by_repo_name(other_repo)

        c.org_ref = c.other_ref = _('Select changeset')

        return render('compare/compare_diff.html')

    @LoginRequired()

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    def compare(self, repo_name, org_ref_type, org_ref, other_ref_type, other_ref):

        # org_ref will be evaluated in org_repo

        org_ref = (org_ref_type, org_ref)

        # other_ref will be evaluated in other_repo

        other_ref = (other_ref_type, other_ref)

        other_repo = request.GET.get('other_repo', org_repo)

        # If merge is True:

        #   Show what org would get if merged with other:

        #   List changesets that are ancestors of other but not of org.

        #   New changesets in org is thus ignored.

        #   Diff will be from common ancestor, and merges of org to other will thus be ignored.

        # If merge is False:

        #   Make a raw diff from org to other, no matter if related or not.

        #   Changesets in one and not in the other will be ignored

        merge = bool(request.GET.get('merge'))

        # fulldiff disables cut_off_limit

        c.fulldiff = request.GET.get('fulldiff')

        # partial uses compare_cs.html template directly

        partial = request.environ.get('HTTP_X_PARTIAL_XHR')

        # as_form puts hidden input field with changeset revisions

        c.as_form = partial and request.GET.get('as_form')

        # swap url for compare_diff page - never partial and never as_form

        c.swap_url = h.url('compare_url',

            repo_name=other_repo,

            org_ref_type=other_ref[0], org_ref=other_ref[1],

            other_repo=org_repo,

            other_ref_type=org_ref[0], other_ref=org_ref[1],

            merge=merge or '')

        org_repo = Repository.get_by_repo_name(org_repo)

        other_repo = Repository.get_by_repo_name(other_repo)

        if org_repo is None:

            msg = 'Could not find org repo %s' % org_repo

            log.error(msg)

            h.flash(msg, category='error')

            return redirect(url('compare_home', repo_name=c.repo_name))

        if other_repo is None:

            msg = 'Could not find other repo %s' % other_repo

            log.error(msg)

            h.flash(msg, category='error')

            return redirect(url('compare_home', repo_name=c.repo_name))

        if org_repo.scm_instance.alias != other_repo.scm_instance.alias:

            msg = 'compare of two different kind of remote repos not available'

            log.error(msg)

            h.flash(msg, category='error')

            return redirect(url('compare_home', repo_name=c.repo_name))

        org_rev = self.__get_rev_or_redirect(ref=org_ref, repo=org_repo, partial=partial)

        other_rev = self.__get_rev_or_redirect(ref=other_ref, repo=other_repo, partial=partial)

        c.compare_home = False

        c.org_repo = org_repo

        c.other_repo = other_repo

        c.org_ref = org_ref[1]

        c.other_ref = other_ref[1]

        c.org_ref_type = org_ref[0]

        c.other_ref_type = other_ref[0]

        c.cs_ranges, c.ancestor = self._get_changesets(

            org_repo.scm_instance.alias, org_repo.scm_instance, org_rev,

            other_repo.scm_instance, other_rev, merge)

            [x.raw_id for x in c.cs_ranges])

        if merge and not c.ancestor:

            log.error('Unable to find ancestor revision')

        if partial:

            return render('compare/compare_cs.html')

        if c.ancestor:

            assert merge

            # case we want a simple diff without incoming changesets,

            # previewing what will be merged.

            # Make the diff on the other repo (which is known to have other_ref)

            log.debug('Using ancestor %s as org_ref instead of %s'

                      % (c.ancestor, org_ref))

            org_rev = c.ancestor

            org_repo = other_repo

        diff_limit = self.cut_off_limit if not c.fulldiff else None

        log.debug('running diff between %s and %s in %s'

                  % (org_rev, other_rev, org_repo.scm_instance.path))

        txtdiff = org_repo.scm_instance.get_diff(rev1=org_rev, rev2=other_rev)

        diff_processor = diffs.DiffProcessor(txtdiff or '', format='gitdiff',

                                             diff_limit=diff_limit)

        _parsed = diff_processor.prepare()

        c.limited_diff = False

        if isinstance(_parsed, LimitedDiffContainer):