Add explicit dependencies for store dependencies

This adds explicit dependencies for the stores in the extras section.
Users can now install glance_store and specify which backends to install
dependencies. For example:

    $ pip install glance_store[swift]

should install glance_store and the dependences to use the swift store
(currently python-swiftclient and httplib2).

This has a number of benefits, primarily that if the dependencies for a
particular store change, the installation process should remain the
same.

Change-Id: I94d75e3d52c9e3e9f7a741a079d25b1bdff29b27

setup.cfg

@@ -52,6 +52,20 @@ glance_store.drivers =
 oslo.config.opts =
     glance.store = glance_store.backend:_list_opts
 
+[extras]
+# Dependencies for each of the optional stores
+s3 =
+  boto>=2.32.1
+vmware =
+  oslo.vmware>=1.16.0 # Apache-2.0
+swift =
+  httplib2>=0.7.5
+  python-swiftclient>=2.2.0
+gridfs =
+  pymongo>=3.0.2
+cinder =
+  python-cinderclient>=1.3.1
+
 [build_sphinx]
 source-dir = doc/source
 build-dir = doc/build

test-requirements.txt

@@ -20,23 +20,3 @@ oslotest>=1.5.1 # Apache-2.0
 # this is required for the docs build jobs
 sphinx!=1.2.0,!=1.3b1,<1.3,>=1.1.2
 oslosphinx>=2.5.0 # Apache-2.0
-
-#
-# Store specific packages
-#
-
-# For S3 storage backend
-boto>=2.32.1
-
-# For VMware storage backend.
-oslo.vmware>=0.13.1 # Apache-2.0
-
-# Swift Backend
-httplib2>=0.7.5
-python-swiftclient>=2.2.0
-
-# GridFS backend
-pymongo>=3.0.2
-
-# Cinder backend
-python-cinderclient>=1.2.2

tox.ini

@@ -9,6 +9,7 @@ usedevelop = True
 install_command = pip install --allow-all-external --allow-insecure netaddr -U {opts} {packages}
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
+       .[s3,vmware,swift,gridfs,cinder]
 commands = python setup.py testr --slowest --testr-args='{posargs}'
 
 [tox:jenkins]