summaryrefslogtreecommitdiff
path: root/lorrycontroller/gitlab.py
blob: 55b8e4f897530cdf3e609812c48c5e8e7f8a7b06 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
# Copyright (C) 2016  Codethink Limited
#
# 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; version 2 of the License.
#
# 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

from __future__ import absolute_import
import re
import urlparse
import itertools
try:
    import gitlab
except ImportError:
    gitlab = None


class MissingGitlabModuleError(Exception):
    pass


class Gitlab(object):

    '''Run commands on a GitLab instance.

    This uses the python wrapper around the GitLab API.
    Use of the API requires the private token of a user with master access
    to the targetted group.

    '''

    def __init__(self, host, token):
        if gitlab:
            url = "http://" + host
            self.gl = gitlab.Gitlab(url, token)
        else:
            raise MissingGitlabModuleError('gitlab module missing\n'
                '\tpython-gitlab is required with GitLab as the git server')

    def first(self, predicate, iterable):
        return next(itertools.ifilter(predicate, iterable))

    def split_and_unslashify_path(self, path):
        group, project = path.split('/', 1)
        return group, project.replace('/', '_')

    def find_project(self, repo_path):
        group, project = self.split_and_unslashify_path(repo_path)
        predicate = lambda x: x.namespace.name == group and x.name == project

        return self.first(predicate, self.gl.projects.search(project))

    def has_project(self, repo_path):
        try:
            return bool(self.find_project(repo_path))
        except StopIteration:
            return False

    def create_project(self, repo_path):
        # GitLab only supports one level of namespacing.
        group_name, project_name = self.split_and_unslashify_path(repo_path)
        group = None
        try:
            group = self.gl.groups.get(group_name)
        except gitlab.GitlabGetError as e:
            if e.error_message == '404 Not found':
                group = self.gl.groups.create(
                    {'name': group_name, 'path': group_name})
            else:
                raise

        project = {
            'name': project_name,
            'public': True,
            'merge_requests_enabled': False,
            'namespace_id': group.id,
            # Set the original path in the description.  We will use this to
            # work around lack of multi-level namespacing.
            'description': 'original_path: %s' % repo_path
        }
        self.gl.projects.create(project)

    def try_get_original_path(self, project_description):
        match = re.search('original_path:\s(.*)', str(project_description))
        if match:
            return match.groups()[0]

    def suitable_path(self, project):
        '''Return a path for a downstream Lorry Controller instance to consume.

        Should the path that was lorried have contained more than one level of
        namespacing (more than one '/' within the repository path), then for
        GitLab to handle this, we replace any '/'s (remaining in the project
        name after extracting the group name) with underscores (_).  To preserve
        the original path, we set the 'original_path' within the project
        description.
        This method will attempt to return 'original_path' if it was set,
        otherwise it will return the 'path_with_namespace', being of the format
        'group_name/project_name', rather than 'group_name/project/name'.
        '''
        return (self.try_get_original_path(project.description) or
                project.path_with_namespace)

    def list_projects(self):
        '''List projects on a GitLab instance.

        In attempt to handle GitLab's current lack of multi-level namespacing
        (see: https://gitlab.com/gitlab-org/gitlab-ce/issues/2772), return
        the 'original_path' stored in a project's description, if it exists.
        '''

        return [self.suitable_path(x) for x in self.gl.projects.list()]

    def get_project_url(self, protocol, project_path):
        '''Return the clone url for a GitLab project.

        Depending on the protocol specified, will return a suitable clone url.
        If 'ssh', a url in the format 'git@host:group/project.git' will be
        returned.
        If 'http' or 'https', the http_url_to_repo from the GitLab API is split
        with urlparse into its constituent parts: the protocol (http by
        default), the host, and the path ('group/project.git').  This is then
        rejoined, replacing the protocol with what is specified.  The resulting
        format matching 'http(s)://host/group/project.git'.
        '''

        project = self.find_project(project_path)

        if protocol == 'ssh':
            return project.ssh_url_to_repo
        elif protocol in ('http', 'https'):
            split = urlparse.urlsplit(project.http_url_to_repo)
            return urlparse.urlunsplit((
                protocol, split.netloc, split.path, '', ''))