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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def get_objects(self, uri, pull=True, **kwargs):
        '''
        Walk through repo commits to generate a list of repo commit
        objects.

        Each object has the following properties:
            * repo uri
            * general commit info
            * files added, removed fnames
            * lines added, removed
            * acked_by
            * signed_off_by
            * resolves
            * related
        '''
        self.repo = repo = git_clone(uri, pull=pull, reflect=True)
        # get a full list of all commit SHAs in the repo (all branches)
        cmd = 'git rev-list --all'
        output = sys_call(cmd, cwd=repo.path)
        repo_shas = set(x.strip() for x in output.split('\n') if x)
        logger.debug("Total Commits: %s" % len(repo_shas))

        cmd = 'git --no-pager log --all --format=sha:%H --numstat'
        output = sys_call(cmd)
        all_logs = re.sub('\n+', '\n', output)
        c_logs = [x for x in [s.strip() for s in all_logs.split('sha:')] if x]

        _end = None  # once was true, always is true...
        objs = []
        for c_log in c_logs:
            sha, s, all_changes = c_log.partition('\n')
            #try:
            c = repo.get_object(sha)
            # FIXME: not normalizing to UTC
            _start = ts2dt(c.commit_time)
            #except Exception as e:
            #    _start = now
            #    obj = dict(_oid=sha, _start=_start, _end=_end,
            #               repo_uri=uri, _e={sha: to_encoding(e)})
            #    self.objects.add(obj)
            #    continue

            # and some basic stuff...
            obj = dict(_oid=sha, _start=_start, _end=_end,
                       repo_uri=uri, tree=c.tree, parents=c.parents,
                       author=c.author, committer=c.committer,
                       author_time=c.author_time, message=c.message,
                       mergetag=c.mergetag, extra=c.extra)

            for _file in all_changes.split('\n'):
                _file = _file.strip()
                obj.setdefault('files', {})
                if not _file:
                    added, removed, fname = 0, 0, None
                else:
                    added, removed, fname = _file.split('\t')
                    added = 0 if added == '-' else int(added)
                    removed = 0 if removed == '-' else int(removed)
                    # FIXME: sql doesn't nest well..
                    changes = {'added': added,
                               'removed': removed}
                    obj['files'][fname] = changes

            # file +/- totals
            obj['added'] = sum(
                [v.get('added', 0) for v in obj['files'].itervalues()])
            obj['removed'] = sum(
                [v.get('removed', 0) for v in obj['files'].itervalues()])

            # extract interesting bits from the message
            obj['acked_by'] = acked_by_re.findall(c.message)
            obj['signed_off_by'] = signed_off_by_re.findall(c.message)
            obj['resolves'] = resolves_re.findall(c.message)
            obj['related'] = related_re.findall(c.message)
            objs.append(obj)
        self.objects.extend(objs)

        return super(Commit, self).get_objects(**kwargs)