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compare.py
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# -*- coding: utf-8 -*-
"""
rhodecode.controllers.compare
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compare controller for pylons showing differences between two
repos, branches, bookmarks or tips
:created_on: May 6, 2012
:author: marcink
:copyright: (C) 2010-2012 Marcin Kuzminski <marcin@python-works.com>
:license: GPLv3, see COPYING for more details.
"""
# 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/>.
import logging
import traceback
import re
from webob.exc import HTTPNotFound
from pylons import request, response, session, tmpl_context as c, url
from pylons.controllers.util import abort, redirect
from pylons.i18n.translation import _
from rhodecode.lib.vcs.exceptions import EmptyRepositoryError, RepositoryError
from rhodecode.lib.vcs.utils import safe_str
from rhodecode.lib.vcs.utils.hgcompat import scmutil
from rhodecode.lib import helpers as h
from rhodecode.lib.base import BaseRepoController, render
from rhodecode.lib.auth import LoginRequired, HasRepoPermissionAnyDecorator
from rhodecode.lib import diffs, unionrepo
from rhodecode.model.db import Repository
from webob.exc import HTTPBadRequest
from rhodecode.lib.diffs import LimitedDiffContainer
log = logging.getLogger(__name__)
class CompareController(BaseRepoController):
def __before__(self):
super(CompareController, self).__before__()
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:
type_, rev = rev
return repo.scm_instance.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('summary_home', repo_name=repo.repo_name))
except RepositoryError, e:
log.error(traceback.format_exc())
h.flash(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_ref, other_repo, other_ref, merge):
"""
Returns a list of changesets that can be merged from org_repo@org_ref
to other_repo@other_ref ... and the ancestor that would be used for merge
:param org_repo:
:param org_ref:
:param other_repo:
:param other_ref:
:param tmp:
"""
ancestor = None
if alias == 'hg':
# lookup up the exact node id
_revset_predicates = {
'branch': 'branch',
'book': 'bookmark',
'tag': 'tag',
'rev': 'id',
}
org_rev_spec = "max(%s('%s'))" % (_revset_predicates[org_ref[0]],
safe_str(org_ref[1]))
org_revs = scmutil.revrange(org_repo._repo, [org_rev_spec])
org_rev = org_repo._repo[org_revs[-1] if org_revs else -1].hex()
other_rev_spec = "max(%s('%s'))" % (_revset_predicates[other_ref[0]],
safe_str(other_ref[1]))
other_revs = scmutil.revrange(other_repo._repo, [other_rev_spec])
other_rev = other_repo._repo[other_revs[-1] if other_revs else -1].hex()
#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 = ["ancestors(id('%s')) and not ancestors(id('%s')) and not id('%s')" %
(other_rev, org_rev, org_rev)]
ancestors = scmutil.revrange(hgrepo,
["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 = ["id('%s') :: id('%s') - id('%s')" %
(org_rev, other_rev, org_rev)]
changesets = [other_repo.get_changeset(cs)
for cs in scmutil.revrange(hgrepo, revs)]
elif alias == 'git':
if org_repo != other_repo:
raise Exception('Comparing of different GIT repositories is not'
'allowed. Got %s != %s' % (org_repo, other_repo))
so, se = org_repo.run_git_command(
'log --reverse --pretty="format: %%H" -s -p %s..%s'
% (org_ref[1], other_ref[1])
)
changesets = [org_repo.get_changeset(cs)
for cs in re.findall(r'[0-9a-fA-F]{40}', so)]
return changesets, ancestor
@LoginRequired()
@HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
'repository.admin')
def index(self, org_ref_type, org_ref, other_ref_type, other_ref):
# org_ref will be evaluated in org_repo
org_repo = c.rhodecode_db_repo.repo_name
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:
log.error('Could not find org repo %s' % org_repo)
raise HTTPNotFound
if other_repo is None:
log.error('Could not find other repo %s' % other_repo)
raise HTTPNotFound
if org_repo != other_repo and h.is_git(org_repo):
log.error('compare of two remote repos not available for GIT REPOS')
raise HTTPNotFound
if org_repo.scm_instance.alias != other_repo.scm_instance.alias:
log.error('compare of two different kind of remote repos not available')
raise HTTPNotFound
self.__get_cs_or_redirect(rev=org_ref, repo=org_repo, partial=partial)
self.__get_cs_or_redirect(rev=other_ref, repo=other_repo, partial=partial)
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_ref,
other_repo.scm_instance, other_ref,
merge)
c.statuses = c.rhodecode_db_repo.statuses([x.raw_id for x in
c.cs_ranges])
if not c.ancestor:
log.warning('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_ref = ('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@%s and %s@%s'
% (org_repo.scm_instance.path, org_ref,
other_repo.scm_instance.path, other_ref))
_diff = org_repo.scm_instance.get_diff(rev1=safe_str(org_ref[1]),
rev2=safe_str(other_ref[1]))
diff_processor = diffs.DiffProcessor(_diff 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']
if st[0] != 'b':
c.lines_added += st[0]
c.lines_deleted += st[1]
fid = h.FID('', f['filename'])
c.files.append([fid, f['operation'], f['filename'], f['stats']])
diff = diff_processor.as_html(enable_comments=False, parsed_lines=[f])
c.changes[fid] = [f['operation'], f['filename'], diff]
return render('compare/compare_diff.html')