Initial support for social authentication

Right now only basic login works and is not really integrated into rest
of Weblate.

Issue #170

.gitignore

@@ -5,6 +5,7 @@ locale/*/*/*.mo
 /weblate/whoosh-index/
 weblate-*.tar.*
 /translate
+/social
 /*.db
 /weblate/settings.py
 /weblate/test-repos/

accounts/pipeline.py

+# -*- coding: utf-8 -*-
+#
+# Copyright © 2012 - 2013 Michal Čihař <michal@cihar.com>
+#
+# This file is part of Weblate <http://weblate.org/>
+#
+# 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, either version 3 of the License, or
+# (at your option) any later version.
+#
+# 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, see <http://www.gnu.org/licenses/>.
+#
+
+from django.shortcuts import redirect
+
+from social.pipeline.partial import partial
+
+
+@partial
+def require_email(strategy, details, user=None, is_new=False,
+                  *args, **kwargs):
+    if user and user.email:
+        return
+
+    elif is_new and not details.get('email'):
+
+        if strategy.session_get('saved_email'):
+            details['email'] = strategy.session_pop('saved_email')
+        else:
+            return redirect('require_email')

accounts/urls.py

@@ -18,7 +18,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 
-from django.conf.urls import patterns, url
+from django.conf.urls import patterns, url, include
 from django.utils.translation import ugettext_lazy as _
 from django.contrib.auth import views as auth_views
 from django.conf import settings
@@ -131,4 +131,5 @@ urlpatterns = patterns(
         'accounts.views.user_profile',
         name='profile',
     ),
+    url(r'', include('social.apps.django_app.urls', namespace='social')),
 )

docs/install.rst

@@ -16,6 +16,8 @@ GitPython (>= 0.3.2)
     https://github.com/gitpython-developers/GitPython
 Git (>= 1.0)
     http://git-scm.com/
+python-social-auth (>= 0.1)
+    http://psa.matiasaguirre.net/
 Django-registration (= 0.8, 0.9 or newer are not supported)
     https://bitbucket.org/ubernostrum/django-registration/
 Whoosh (>= 2.5, 2.5.2 is recommended)

requirements.txt

@@ -6,3 +6,4 @@ Whoosh>=2.5
 Translate-Toolkit>=1.10.0
 lxml>=3.1.0
 Pillow
+python-social-auth

trans/requirements.py

@@ -103,6 +103,16 @@ def get_versions():
         '0.8',
     ))
 
+    name = 'python-social-auth'
+    url = 'http://psa.matiasaguirre.net/'
+    mod = get_version_module('social', name, url)
+    result.append((
+        name,
+        url,
+        mod.__version__,
+        '0.1',
+    ))
+
     name = 'Translate Toolkit'
     url = 'http://toolkit.translatehouse.org/'
     mod = get_version_module('translate', name, url)

weblate/html/registration/login.html

@@ -43,4 +43,13 @@
 {% blocktrans %}Forgot your password? You can <a href="{{ reset_url }}">reset it</a>.{% endblocktrans %}
 </p>
 
+<ul>
+  {% for name in backends.not_associated %}
+    <li>
+      <a href="{% url 'social:begin' name %}">{{ name }}</a>
+    </li>
+  {% endfor %}
+</ul>
+
+
 {% endblock %}

weblate/settings_example.py

@@ -167,9 +167,32 @@ TEMPLATE_LOADERS = (
 
 # Authentication configuration
 AUTHENTICATION_BACKENDS = (
+    'social.backends.google.GoogleOpenId',
+    #'social.backends.github.GithubOAuth2',
+    #'social.backends.open_id.OpenIdAuth',
     'accounts.auth.AnonymousUserBackend',
 )
 
+# Social auth backends setup
+SOCIAL_AUTH_GITHUB_KEY = ''
+SOCIAL_AUTH_GITHUB_SECRET = ''
+SOCIAL_AUTH_GITHUB_SCOPE = ['user:email']
+
+# Social auth settings
+SOCIAL_AUTH_PIPELINE = (
+    'social.pipeline.social_auth.social_details',
+    'social.pipeline.social_auth.social_uid',
+    'social.pipeline.social_auth.auth_allowed',
+    'social.pipeline.social_auth.social_user',
+    'social.pipeline.user.get_username',
+    'accounts.pipeline.require_email',
+    'social.pipeline.mail.mail_validation',
+    'social.pipeline.user.create_user',
+    'social.pipeline.social_auth.associate_user',
+    'social.pipeline.social_auth.load_extra_data',
+    'social.pipeline.user.user_details'
+)
+
 # Middleware
 MIDDLEWARE_CLASSES = (
     'django.middleware.common.CommonMiddleware',
@@ -201,6 +224,7 @@ INSTALLED_APPS = (
     'django.contrib.admin',
     'django.contrib.admindocs',
     'django.contrib.sitemaps',
+    'social.apps.django_app.default',
     'registration',
     'south',
     'trans',
@@ -221,6 +245,7 @@ TEMPLATE_CONTEXT_PROCESSORS = (
     'django.core.context_processors.request',
     'django.core.context_processors.csrf',
     'django.contrib.messages.context_processors.messages',
+    'social.apps.django_app.context_processors.backends',
     'trans.context_processors.weblate_context',
 )