Generate API documentation

As a new user I found navigating the documentation difficult.  The
flow was a bit unclear and searches bring up old versions of API
references that aren't included in the current documentation.

This
 - provides an introduction to the tools similar to other projects
 - generates API references for the v1 and v2 client
 - fixes some minor docstring issues
 - adds doc/* to pep8 tests to check the conf.py

The API generation code is cribbed from python-novaclient

Change-Id: I65772127679d7afd5e7e48ca7872366b01382f21

doc/source/conf.py

@@ -1,3 +1,18 @@
+# Copyright 2015 OpenStack Foundation
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
 # -*- coding: utf-8 -*-
 #
 
@@ -7,6 +22,48 @@ import sys
 sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__),
                 '..', '..')))
 
+BASE_DIR = os.path.dirname(os.path.abspath(__file__))
+ROOT = os.path.abspath(os.path.join(BASE_DIR, "..", ".."))
+
+
+def gen_ref(ver, title, names):
+    refdir = os.path.join(BASE_DIR, "ref")
+    pkg = "glanceclient"
+    if ver:
+        pkg = "%s.%s" % (pkg, ver)
+        refdir = os.path.join(refdir, ver)
+    if not os.path.exists(refdir):
+        os.makedirs(refdir)
+    idxpath = os.path.join(refdir, "index.rst")
+    with open(idxpath, "w") as idx:
+        idx.write(("%(title)s\n"
+                   "%(signs)s\n"
+                   "\n"
+                   ".. toctree::\n"
+                   "   :maxdepth: 1\n"
+                   "\n") % {"title": title, "signs": "=" * len(title)})
+        for name in names:
+            idx.write("   %s\n" % name)
+            rstpath = os.path.join(refdir, "%s.rst" % name)
+            with open(rstpath, "w") as rst:
+                rst.write(("%(title)s\n"
+                           "%(signs)s\n"
+                           "\n"
+                           ".. automodule:: %(pkg)s.%(name)s\n"
+                           "   :members:\n"
+                           "   :undoc-members:\n"
+                           "   :show-inheritance:\n"
+                           "   :noindex:\n")
+                          % {"title": name.capitalize(),
+                             "signs": "=" * len(name),
+                             "pkg": pkg, "name": name})
+
+gen_ref(None, "API", ["client", "exc"])
+gen_ref("v1", "OpenStack Images Version 1 Client Reference",
+        ["client", "images", "image_members"])
+gen_ref("v2", "OpenStack Images Version 2 Client Reference",
+        ["client", "images", "image_tags",
+         "image_members", "tasks", "metadefs"])
 
 # -- General configuration ----------------------------------------------------