doc: fixes for local dev builds

Signed-off-by: Leonid Usov <leonid.usov@ibm.com>

doc/.gitignore

@@ -1,2 +1,3 @@
 /overview.png
 /object_store.png
+_build/

doc/_ext/ceph_commands.py

@@ -177,7 +177,7 @@ class Sig:
 
     @staticmethod
     def parse_args(args):
-        return [Sig._parse_arg_desc(arg) for arg in args.split()]
+        return [Sig._parse_arg_desc(arg) for arg in args]
 
 
 TEMPLATE = '''
@@ -358,8 +358,9 @@ class CephMgrCommands(Directive):
         cmds = sorted(cmds, key=lambda cmd: cmd.prefix)
         self._render_cmds(cmds)
 
-        orig_rgw_mod = sys.modules['pybind_rgw_mod']
-        sys.modules['rgw'] = orig_rgw_mod
+        if 'pybind_rgw_mod' in sys.modules:
+            orig_rgw_mod = sys.modules['pybind_rgw_mod']
+            sys.modules['rgw'] = orig_rgw_mod
 
         return []
 

doc/conf.py

@@ -13,9 +13,13 @@ top_level = \
         os.path.dirname(
             os.path.abspath(__file__)))
 
-pybind_rgw_mod = __import__('rgw', globals(), locals(), [], 0)
-sys.modules['pybind_rgw_mod'] = pybind_rgw_mod
-
+# it could be that ceph was built without RGW support
+# e.g. in a local development environment
+try:
+    pybind_rgw_mod = __import__('rgw', globals(), locals(), [], 0)
+    sys.modules['pybind_rgw_mod'] = pybind_rgw_mod
+except Exception:
+    pass
 
 def parse_ceph_release():
     with open(os.path.join(top_level, 'src/ceph_release')) as f: