def handle_git_receive(repo_path, revs, env, hook_type='post'):

    """

    A really hacky method that is runned by git post-receive hook and logs

    an push action together with pushed revisions. It's executed by subprocess

    thus needs all info to be able to create a on the fly pylons enviroment,

    connect to database and run the logging code. Hacky as sh*t but works.

    :param repo_path:

    :type repo_path:

    :param revs:

    :type revs:

    :param env:

    :type env:

    """

    from paste.deploy import appconfig

    from sqlalchemy import engine_from_config

    from rhodecode.config.environment import load_environment

    from rhodecode.model import init_model

    from rhodecode.model.db import RhodeCodeUi

    from rhodecode.lib.utils import make_ui

    extras = json.loads(env['RHODECODE_EXTRAS'])

    path, ini_name = os.path.split(extras['config'])

    conf = appconfig('config:%s' % ini_name, relative_to=path)

    load_environment(conf.global_conf, conf.local_conf)

    engine = engine_from_config(conf, 'sqlalchemy.db1.')

    init_model(engine)

    baseui = make_ui('db')

    # fix if it's not a bare repo

    if repo_path.endswith(os.sep + '.git'):

        repo_path = repo_path[:-5]

    repo = Repository.get_by_full_path(repo_path)

    if not repo:

        raise OSError('Repository %s not found in database'

                      % (safe_str(repo_path)))

    _hooks = dict(baseui.configitems('hooks')) or {}

    for k, v in extras.items():

        baseui.setconfig('rhodecode_extras', k, v)

    if hook_type == 'pre':

        repo = repo.scm_instance

    else:

        #post push shouldn't use the cached instance never

    repo.ui = baseui

    if hook_type == 'pre':

        pre_push(baseui, repo)

    # if push hook is enabled via web interface

    elif hook_type == 'post' and _hooks.get(RhodeCodeUi.HOOK_PUSH):

        rev_data = []

        for l in revs:

            old_rev, new_rev, ref = l.split(' ')

            _ref_data = ref.split('/')

            if _ref_data[1] in ['tags', 'heads']:

                rev_data.append({'old_rev': old_rev,

                                 'new_rev': new_rev,

                                 'ref': ref,

                                 'type': _ref_data[1],

                                 'name': _ref_data[2].strip()})

        git_revs = []

        for push_ref  in rev_data:

            _type = push_ref['type']

            if _type == 'heads':

                if push_ref['old_rev'] == EmptyChangeset().raw_id:

                    cmd = "for-each-ref --format='%(refname)' 'refs/heads/*'"

                    heads = repo.run_git_command(cmd)[0]

                    heads = heads.replace(push_ref['ref'], '')

                    heads = ' '.join(map(lambda c: c.strip('\n').strip(),

                                         heads.splitlines()))

                    cmd = (('log %(new_rev)s' % push_ref) +

                           ' --reverse --pretty=format:"%H" --not ' + heads)

                    git_revs += repo.run_git_command(cmd)[0].splitlines()

                elif push_ref['new_rev'] == EmptyChangeset().raw_id:

                    #delete branch case

                    git_revs += ['delete_branch=>%s' % push_ref['name']]

                else:

                    cmd = (('log %(old_rev)s..%(new_rev)s' % push_ref) +

                           ' --reverse --pretty=format:"%H"')

                    git_revs += repo.run_git_command(cmd)[0].splitlines()

            elif _type == 'tags':

                git_revs += ['tag=>%s' % push_ref['name']]

        log_push_action(baseui, repo, _git_revs=git_revs)

        from urlparse import urlparse

        import urllib

        parsed_url = urlparse(url('home', qualified=True))

        default_clone_uri = '%(scheme)s://%(user)s%(pass)s%(netloc)s%(prefix)s%(path)s'

        decoded_path = safe_unicode(urllib.unquote(parsed_url.path))

        args = {

           'user': '',

           'pass': '',

           'scheme': parsed_url.scheme,

           'netloc': parsed_url.netloc,

           'prefix': decoded_path,

           'path': self.repo_name

        }

        args.update(override)

        return default_clone_uri % args

    #==========================================================================

    # SCM PROPERTIES

    #==========================================================================

    def get_changeset(self, rev=None):

        return get_changeset_safe(self.scm_instance, rev)

    def get_landing_changeset(self):

        """

        Returns landing changeset, or if that doesn't exist returns the tip

        """

        cs = self.get_changeset(self.landing_rev) or self.get_changeset()

        return cs

    def update_changeset_cache(self, cs_cache=None):

        """

        Update cache of last changeset for repository, keys should be::

            short_id

            raw_id

            revision

            message

            date

            author

        :param cs_cache:

        """

        from rhodecode.lib.vcs.backends.base import BaseChangeset

        if cs_cache is None:

            cs_cache = EmptyChangeset()

            # use no-cache version here

            if scm_repo:

                cs_cache = scm_repo.get_changeset()

        if isinstance(cs_cache, BaseChangeset):

            cs_cache = cs_cache.__json__()

        if (cs_cache != self.changeset_cache or not self.changeset_cache):

            _default = datetime.datetime.fromtimestamp(0)

            last_change = cs_cache.get('date') or _default

            log.debug('updated repo %s with new cs cache %s' % (self, cs_cache))

            self.updated_on = last_change

            self.changeset_cache = cs_cache

            Session().add(self)

            Session().commit()

        else:

            log.debug('Skipping repo:%s already with latest changes' % self)

    @property

    def tip(self):

        return self.get_changeset('tip')

    @property

    def author(self):

        return self.tip.author

    @property

    def last_change(self):

        return self.scm_instance.last_change

    def get_comments(self, revisions=None):

        """

        Returns comments for this repository grouped by revisions

        :param revisions: filter query by revisions only

        """

        cmts = ChangesetComment.query()\

            .filter(ChangesetComment.repo == self)

        if revisions:

            cmts = cmts.filter(ChangesetComment.revision.in_(revisions))

        grouped = defaultdict(list)

        for cmt in cmts.all():

            grouped[cmt.revision].append(cmt)

        return grouped

    def statuses(self, revisions=None):

        """

        Returns statuses for this repository

        :param revisions: list of revisions to get statuses for

        :type revisions: list

        """

        statuses = ChangesetStatus.query()\

            .filter(ChangesetStatus.repo == self)\

            .filter(ChangesetStatus.version == 0)

        if revisions:

            statuses = statuses.filter(ChangesetStatus.revision.in_(revisions))

        grouped = {}

        #maybe we have open new pullrequest without a status ?

        stat = ChangesetStatus.STATUS_UNDER_REVIEW

        status_lbl = ChangesetStatus.get_status_lbl(stat)

        for pr in PullRequest.query().filter(PullRequest.org_repo == self).all():

            for rev in pr.revisions:

                pr_id = pr.pull_request_id

                pr_repo = pr.other_repo.repo_name

                grouped[rev] = [stat, status_lbl, pr_id, pr_repo]

        for stat in statuses.all():

            pr_id = pr_repo = None

            if stat.pull_request:

                pr_id = stat.pull_request.pull_request_id

                pr_repo = stat.pull_request.other_repo.repo_name

            grouped[stat.revision] = [str(stat.status), stat.status_lbl,

                                      pr_id, pr_repo]

        return grouped

    def _repo_size(self):

        from rhodecode.lib import helpers as h

        log.debug('calculating repository size...')

        return h.format_byte_size(self.scm_instance.size)

    #==========================================================================

    # SCM CACHE INSTANCE

    #==========================================================================

    @property

    def invalidate(self):

        return CacheInvalidation.invalidate(self.repo_name)

    def set_invalidate(self):

        """

        set a cache for invalidation for this instance

        """

        CacheInvalidation.set_invalidate(repo_name=self.repo_name)

    def scm_instance_no_cache(self):

        return self.__get_instance()

    @LazyProperty

    def scm_instance(self):

        import rhodecode

        full_cache = str2bool(rhodecode.CONFIG.get('vcs_full_cache'))

        if full_cache:

            return self.scm_instance_cached()

        return self.__get_instance()

    def scm_instance_cached(self, cache_map=None):

        @cache_region('long_term')

        def _c(repo_name):

            return self.__get_instance()

        rn = self.repo_name

        log.debug('Getting cached instance of repo')

        if cache_map:

            # get using prefilled cache_map

            invalidate_repo = cache_map[self.repo_name]

            if invalidate_repo:

                invalidate_repo = (None if invalidate_repo.cache_active

                                   else invalidate_repo)

        else:

            # get from invalidate

            invalidate_repo = self.invalidate

        if invalidate_repo is not None:

            region_invalidate(_c, None, rn)

            # update our cache

            CacheInvalidation.set_valid(invalidate_repo.cache_key)

        return _c(rn)

    def __get_instance(self):

        repo_full_path = self.repo_full_path

        try:

            alias = get_scm(repo_full_path)[0]

            log.debug('Creating instance of %s repository from %s'

                      % (alias, repo_full_path))

            backend = get_backend(alias)

        except VCSError:

            log.error(traceback.format_exc())

            log.error('Perhaps this repository is in db and not in '

                      'filesystem run rescan repositories with '

                      '"destroy old data " option from admin panel')

            return