Added env.enable_ra variable and change cert.py and ra.py plugin modules to register plugins conditionally

ipalib/__init__.py

@@ -701,7 +701,7 @@ plugin (or plugins) is imported.  For example:
 1
 >>> api.bootstrap(in_server=True) # We want to execute, not forward
 >>> len(api.env)
-38
+39
 
 `Env._bootstrap()`, which is called by `API.bootstrap()`, will create several
 run-time variables that connot be overriden in configuration files or through

ipalib/constants.py

@@ -115,6 +115,9 @@ DEFAULT_CONFIG = (
     ('prompt_all', False),
     ('interactive', True),
 
+    # Enable certain optional plugins:
+    ('enable_ra', False),
+
     # ********************************************************
     #  The remaining keys are never set from the values here!
     # ********************************************************

ipalib/plugins/cert.py

@@ -22,8 +22,10 @@
 Command plugins for IPA-RA certificate operations.
 """
 
-from ipalib import api, Command, Str, Int
+from ipalib import api
 
+if api.env.enable_ra:
+    from ipalib import Command, Str, Int
 
     class cert_request(Command):
         """

ipaserver/plugins/ra.py

@@ -418,4 +418,5 @@ class ra(Backend):
         # self.debug("IPA-RA: stderr: '%s'" % stderr)
         return (p.returncode, stdout, stderr)
 
+if api.env.enable_ra:
     api.register(ra)