New module - github_key (#692)

Create github_key module for managing GitHub keys.
This module creates, removes, or updates GitHub access keys.

source_control/github_key.py

@@ -0,0 +1,224 @@
+#!/usr/bin/python
+# This file is part of Ansible
+#
+# Ansible 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.
+#
+# Ansible 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 Ansible.  If not, see <http://www.gnu.org/licenses/>.
+
+DOCUMENTATION = '''
+module: github_key
+short_description: Manage GitHub access keys.
+description:
+    - Creates, removes, or updates GitHub access keys.
+version_added: "2.0"
+options:
+  token:
+    description:
+      - GitHub Access Token with permission to list and create public keys.
+    required: true
+  name:
+    description:
+      - SSH key name
+    required: true
+  pubkey:
+    description:
+      - SSH public key value. Required when C(state=present).
+    required: false
+    default: none
+  state:
+    description:
+      - Whether to remove a key, ensure that it exists, or update its value.
+    choices: ['present', 'absent']
+    default: 'present'
+    required: false
+  force:
+    description:
+      - The default is C(yes), which will replace the existing remote key
+        if it's different than C(pubkey). If C(no), the key will only be
+        set if no key with the given C(name) exists.
+    required: false
+    choices: ['yes', 'no']
+    default: 'yes'
+
+author: Robert Estelle (@erydo)
+'''
+
+EXAMPLES = '''
+- name: Read SSH public key to authorize
+  shell: cat /home/foo/.ssh/id_rsa.pub
+  register: ssh_pub_key
+
+- name: Authorize key with GitHub
+  local_action:
+    module: github_key
+    name: 'Access Key for Some Machine'
+    token: '{{github_access_token}}'
+    pubkey: '{{ssh_pub_key.stdout}}'
+'''
+
+
+import sys  # noqa
+import json
+import re
+
+
+API_BASE = 'https://api.github.com'
+
+
+class GitHubResponse(object):
+    def __init__(self, response, info):
+        self.content = response.read()
+        self.info = info
+
+    def json(self):
+        return json.loads(self.content)
+
+    def links(self):
+        links = {}
+        if 'link' in self.info:
+            link_header = re.info['link']
+            matches = re.findall('<([^>]+)>; rel="([^"]+)"', link_header)
+            for url, rel in matches:
+                links[rel] = url
+        return links
+
+
+class GitHubSession(object):
+    def __init__(self, module, token):
+        self.module = module
+        self.token = token
+
+    def request(self, method, url, data=None):
+        headers = {
+            'Authorization': 'token {}'.format(self.token),
+            'Content-Type': 'application/json',
+            'Accept': 'application/vnd.github.v3+json',
+        }
+        response, info = fetch_url(
+            self.module, url, method=method, data=data, headers=headers)
+        if not (200 <= info['status'] < 400):
+            self.module.fail_json(
+                msg=(" failed to send request %s to %s: %s"
+                     % (method, url, info['msg'])))
+        return GitHubResponse(response, info)
+
+
+def get_all_keys(session):
+    url = API_BASE + '/user/keys'
+    while url:
+        r = session.request('GET', url)
+        for key in r.json():
+            yield key
+
+        url = r.links().get('next')
+
+
+def create_key(session, name, pubkey, check_mode):
+    if check_mode:
+        from datetime import datetime
+        now = datetime.utcnow()
+        return {
+            'id': 0,
+            'key': pubkey,
+            'title': name,
+            'url': 'http://example.com/CHECK_MODE_GITHUB_KEY',
+            'created_at': datetime.strftime(now, '%Y-%m-%dT%H:%M:%SZ'),
+            'read_only': False,
+            'verified': False
+        }
+    else:
+        return session.request(
+            'POST',
+            API_BASE + '/user/keys',
+            data=json.dumps({'title': name, 'key': pubkey})).json()
+
+
+def delete_keys(session, to_delete, check_mode):
+    if check_mode:
+        return
+
+    for key in to_delete:
+        session.request('DELETE', API_BASE + '/user/keys/{[id]}'.format(key))
+
+
+def ensure_key_absent(session, name, check_mode):
+    to_delete = [key for key in get_all_keys(session) if key['title'] == name]
+    delete_keys(session, to_delete, check_mode=check_mode)
+
+    return {'changed': bool(to_delete), 'deleted_keys': to_delete}
+
+
+def ensure_key_present(session, name, pubkey, force, check_mode):
+    matching_keys = [k for k in get_all_keys(session) if k['title'] == name]
+    deleted_keys = []
+
+    if matching_keys and force and matching_keys[0]['key'] != pubkey:
+        delete_keys(session, matching_keys, check_mode=check_mode)
+        (deleted_keys, matching_keys) = (matching_keys, [])
+
+    if not matching_keys:
+        key = create_key(session, name, pubkey, check_mode=check_mode)
+    else:
+        key = matching_keys[0]
+
+    return {
+        'changed': bool(deleted_keys or not matching_keys),
+        'deleted_keys': deleted_keys,
+        'matching_keys': matching_keys,
+        'key': key
+    }
+
+
+def main():
+    argument_spec = {
+        'token': {'required': True},
+        'name': {'required': True},
+        'pubkey': {},
+        'state': {'choices': ['present', 'absent'], 'default': 'present'},
+        'force': {'default': True, 'type': 'bool'},
+    }
+    module = AnsibleModule(
+        argument_spec=argument_spec,
+        supports_check_mode=True,
+    )
+
+    token = module.params['token']
+    name = module.params['name']
+    state = module.params['state']
+    force = module.params['force']
+    pubkey = module.params.get('pubkey')
+
+    if pubkey:
+        pubkey_parts = pubkey.split(' ')
+        # Keys consist of a protocol, the key data, and an optional comment.
+        if len(pubkey_parts) < 2:
+            module.fail_json(msg='"pubkey" parameter has an invalid format')
+
+        # Strip out comment so we can compare to the keys GitHub returns.
+        pubkey = ' '.join(pubkey_parts[:2])
+    elif state == 'present':
+        module.fail_json(msg='"pubkey" is required when state=present')
+
+    session = GitHubSession(module, token)
+    if state == 'present':
+        result = ensure_key_present(session, name, pubkey, force=force,
+                                    check_mode=module.check_mode)
+    elif state == 'absent':
+        result = ensure_key_absent(session, name, check_mode=module.check_mode)
+
+    module.exit_json(**result)
+
+from ansible.module_utils.basic import *  # noqa
+from ansible.module_utils.urls import *  # noqa
+
+if __name__ == '__main__':
+    main()