Init commit.

LICENSE

+The MIT License (MIT)
+
+Copyright (c) 2015 GitLab B.V.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

+discourse-omniauth-gitlab
+=========================
+
+Discourse plugin for the omniauth-gitlab strategy.
+
+## Installation
+
+1. Add the plugin's repository url to your container's `app.yml` file:
+
+    ```
+    hooks:
+      after_code:
+        - exec:
+            cd: $home/plugins
+            cmd:
+              - mkdir -p plugins
+              - git clone https://github.com/discourse/docker_manager.git
+              - git clone https://gitlab.com/gitlab-org/discourse-omniauth-gitlab.git
+    ```
+
+1. Rebuild the container by providing the ID and SECRET values:
+
+    ```
+        cd /var/discourse
+        git pull origin master
+        GITLAB_APP_ID=gitlabtestid GITLAB_SECRET=gitlabtestsecret GITLAB_SITE_URL=https://git.example.com ./launcher rebuild app
+    ```
+
+    Otherwise you can provide these variables in `app.yml` under the `env` section.
+
+## License
+
+MIT, see [LICENSE](./LICENSE).

plugin.rb

+# name:  discourse-omniauth-gitlab
+# about: Authenticate Discourse with GitLab
+# version: 0.0.1
+# author: Achilleas Pipinellis
+
+require 'omniauth2-gitlab'
+
+class GitLabAuthenticator < ::Auth::Authenticator
+
+  GITLAB_APP_ID = ENV['GITLAB_APP_ID']
+  GITLAB_SECRET = ENV['GITLAB_SECRET']
+
+  def name
+    'gitlab'
+  end
+
+  def after_authenticate(auth_token)
+    result = Auth::Result.new
+
+    # Grap the info we need from OmniAuth
+    data = auth_token[:info]
+    name = data["first_name"]
+    gl_uid = auth_token["uid"]
+    email = data['email']
+
+    # Plugin specific data storage
+    current_info = ::PluginStore.get("gl", "gl_uid_#{gl_uid}")
+
+    result.user =
+      if current_info
+        User.where(id: current_info[:user_id]).first
+      end
+
+    result.name = name
+    result.extra_data = { gl_uid: gl_uid }
+    result.email = email
+
+    result
+  end
+
+  def after_create_account(user, auth)
+    data = auth[:extra_data]
+    ::PluginStore.set("gl", "gl_uid_#{data[:gl_uid]}", {user_id: user.id })
+  end
+
+  def register_middleware(omniauth)
+    omniauth.provider :gitlab,
+     GITLAB_APP_ID,
+     GITLAB_SECRET,
+     { client_options: {site: ENV['GITLAB_SITE_URL'], }}
+  end
+end
+
+
+auth_provider :title => 'with GitLab',
+    :message => 'Log in via GitLab (Make sure pop up blockers are not enabled).',
+    :frame_width => 920,
+    :frame_height => 800,
+    :authenticator => GitLabAuthenticator.new
+
+
+# We ship with zocial, it may have an icon you like http://zocial.smcllns.com/sample.html
+#  In our current case we don't have an icon for GitLab
+register_css <<CSS
+
+.btn-social.gitlab {
+  background: #554488;
+}
+
+.btn-social.gitlab:before {
+  content: "G";
+}
+
+CSS