try:

            c.changeset = hg_model.get_repo(c.repo_name).get_changeset(revision)

        except RepositoryError:

            log.error(traceback.format_exc())

            return redirect(url('hg_home'))

        else:

            try:

                c.changeset_old = c.changeset.parents[0]

            except IndexError:

                c.changeset_old = None

            c.changes = []

            c.sum_added = 0

            for node in c.changeset.added:

                filenode_old = FileNode(node.path, '')

                if filenode_old.is_binary or node.is_binary:

                    diff = wrap_to_table(_('binary file'))

                else:

                    if c.sum_added < cut_off_limit:

                        f_udiff = differ.get_udiff(filenode_old, node)

                        diff = differ.DiffProcessor(f_udiff).as_html()

                    else:

                cs1 = None

                cs2 = node.last_changeset.short_id                                        

                c.changes.append(('added', node, diff, cs1, cs2))

            c.sum_removed = 0    

            for node in c.changeset.changed:

                try:

                    filenode_old = c.changeset_old.get_node(node.path)

                except ChangesetError:

                    filenode_old = FileNode(node.path, '')

                if filenode_old.is_binary or node.is_binary:

                    diff = wrap_to_table(_('binary file'))

                else:

                    if c.sum_removed < cut_off_limit:

                        f_udiff = differ.get_udiff(filenode_old, node)

                        diff = differ.DiffProcessor(f_udiff).as_html()

                    else:

                cs1 = filenode_old.last_changeset.short_id

                cs2 = node.last_changeset.short_id                    

                c.changes.append(('changed', node, diff, cs1, cs2))

            for node in c.changeset.removed:

                c.changes.append(('removed', node, None, None, None))            

        return render('changeset/changeset.html')

    def raw_changeset(self, revision):

        hg_model = HgModel()

        method = request.GET.get('diff', 'show')

        try:

            c.changeset = hg_model.get_repo(c.repo_name).get_changeset(revision)

        except RepositoryError:

# 

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

# MA  02110-1301, USA.

"""

Created on April 21, 2010

files controller for pylons

@author: marcink

"""

from mercurial import archival

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

from pylons.controllers.util import redirect

from pylons_app.lib.auth import LoginRequired, HasRepoPermissionAnyDecorator

from pylons_app.lib.base import BaseController, render

from pylons_app.lib.utils import EmptyChangeset

from pylons_app.model.hg_model import HgModel

from vcs.exceptions import RepositoryError, ChangesetError

from vcs.nodes import FileNode

from vcs.utils import diffs as differ

import logging

import pylons_app.lib.helpers as h

import tempfile

        return read_in_chunks(archive)

    def diff(self, repo_name, f_path):

        hg_model = HgModel()

        diff1 = request.GET.get('diff1')

        diff2 = request.GET.get('diff2')

        c.action = request.GET.get('diff')

        c.no_changes = diff1 == diff2

        c.f_path = f_path

        c.repo = hg_model.get_repo(c.repo_name)

        try:

                c.changeset_1 = c.repo.get_changeset(diff1)

                node1 = c.changeset_1.get_node(f_path)

            else:

                c.changeset_1 = EmptyChangeset()

                c.changeset_2 = c.repo.get_changeset(diff2)

                node2 = c.changeset_2.get_node(f_path)

            else:

                c.changeset_2 = EmptyChangeset()

        except RepositoryError:

            return redirect(url('files_home',

                                repo_name=c.repo_name, f_path=f_path))

        c.diff1 = 'r%s:%s' % (c.changeset_1.revision, c.changeset_1.short_id)

        c.diff2 = 'r%s:%s' % (c.changeset_2.revision, c.changeset_2.short_id)

        f_udiff = differ.get_udiff(node1, node2)

        diff = differ.DiffProcessor(f_udiff)

        if c.action == 'download':

            diff_name = '%s_vs_%s.diff' % (diff1, diff2)

            response.content_type = 'text/plain'

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

                                                    % diff_name             

            return diff.raw_diff()

        elif c.action == 'raw':

            c.cur_diff = '<pre class="raw">%s</pre>' % h.escape(diff.raw_diff())

        elif c.action == 'diff':

        else:

            #default option

        if not c.cur_diff: c.no_changes = True    

        return render('files/file_diff.html')

    def _get_history(self, repo, node, f_path):

        from vcs.nodes import NodeKind

        if not node.kind is NodeKind.FILE:

            return []

        changesets = node.history

        hist_l = []

        for chs in changesets:

            n_desc = 'r%s:%s' % (chs.revision, chs.short_id)

    tmp.extend(args)

    args = tuple(tmp)

    if name == 'cached_repo_list':

        from pylons_app.model.hg_model import _get_repos_cached

        region_invalidate(_get_repos_cached, None, *args)

    if name == 'full_changelog':

        from pylons_app.model.hg_model import _full_changelog_cached

        region_invalidate(_full_changelog_cached, None, *args)

class EmptyChangeset(BaseChangeset):

    revision = -1

    message = ''

    author = ''

    @LazyProperty

    def raw_id(self):

        """

        Returns raw string identifing this changeset, useful for web

        representation.

        """

        return '0' * 40

    @LazyProperty

    def short_id(self):

        return self.raw_id[:12]

def repo2db_mapper(initial_repo_list, remove_obsolete=False):

    """

    maps all found repositories into db

    """

    from pylons_app.model.repo_model import RepoModel

    sa = meta.Session

    user = sa.query(User).filter(User.admin == True).first()

    rm = RepoModel()

    for name, repo in initial_repo_list.items():