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-rw-r--r--doc/development/index.txt1
-rw-r--r--doc/development/plugins.txt4
-rw-r--r--doc/development/unit-testing.txt25
-rw-r--r--doc/server/plugins/connectors/templatehelper.txt72
4 files changed, 98 insertions, 4 deletions
diff --git a/doc/development/index.txt b/doc/development/index.txt
index 352000dc8..2a54bfad8 100644
--- a/doc/development/index.txt
+++ b/doc/development/index.txt
@@ -39,3 +39,4 @@ git access. Mail the :ref:`help-mailinglist` for details.
testing
documentation
docstyleguide
+ unit-testing
diff --git a/doc/development/plugins.txt b/doc/development/plugins.txt
index 15b512365..b2b70f553 100644
--- a/doc/development/plugins.txt
+++ b/doc/development/plugins.txt
@@ -164,7 +164,6 @@ Example Connector
Bcfg2.Server.Plugin.Connector):
'''The Foo plugin is here to illustrate a barebones connector'''
name = 'Foo'
- version = '$Revision: $'
experimental = True
def __init__(self, core, datastore):
@@ -195,13 +194,10 @@ do so. We will call our new plugin `MyMetadata`.
.. code-block:: python
- __revision__ = '$Revision$'
-
import Bcfg2.Server.Plugins.Metadata
class MyMetadata(Bcfg2.Server.Plugins.Metadata.Metadata):
'''This class contains data for bcfg2 server metadata'''
- __version__ = '$Id$'
__author__ = 'bcfg-dev@mcs.anl.gov'
def __init__(self, core, datastore, watch_clients=True):
diff --git a/doc/development/unit-testing.txt b/doc/development/unit-testing.txt
new file mode 100644
index 000000000..30217dcc5
--- /dev/null
+++ b/doc/development/unit-testing.txt
@@ -0,0 +1,25 @@
+.. -*- mode: rst -*-
+
+.. _development-unit-testing:
+
+==================
+Bcfg2 unit testing
+==================
+
+.. _Python Mock Module: http://python-mock.sourceforge.net/
+.. _Python Nose: http://readthedocs.org/docs/nose/en/latest/
+
+You will first need to install the `Python Mock Module`_ and `Python
+Nose`_ modules. You can then run the existing tests with the
+following.::
+
+ cd testsuite
+ nosetests
+
+You should see output something like the following::
+
+ ..................................................
+ ----------------------------------------------------------------------
+ Ran 50 tests in 0.121s
+
+ OK
diff --git a/doc/server/plugins/connectors/templatehelper.txt b/doc/server/plugins/connectors/templatehelper.txt
new file mode 100644
index 000000000..67219109f
--- /dev/null
+++ b/doc/server/plugins/connectors/templatehelper.txt
@@ -0,0 +1,72 @@
+.. -*- mode: rst -*-
+
+.. _server-plugins-connectors-templatehelper:
+
+==============
+TemplateHelper
+==============
+
+The TemplateHelper plugin is a connector plugin that adds Python
+classes and methods to client metadata instances for use in
+templates. This allows you to easily reuse code that is common
+amongst multiple templates and add convenience methods.
+
+Using TemplateHelper
+====================
+
+First, ``mkdir /var/lib/bcfg2/TemplateHelper`` and add
+**TemplateHelper** to your ``plugins`` line in ``/etc/bcfg2.conf``.
+Restart ``bcfg2-server``.
+
+Now, any ``.py`` file placed in ``/var/lib/bcfg2/TemplateHelper/``
+will be read and added to matching client metadata objects. See
+:ref:`Writing Helpers` below for more information on how to write
+TemplateHelper scripts.
+
+TemplateHelper supports group- and host-specific helpers, so you could
+create, e.g., ``foo.py.G80_test`` to create a helper that only applied
+to machines in the group ``test``.
+
+Writing Helpers
+===============
+
+A helper module is just a Python module with three special conditions:
+
+* The filename must end with ``.py`` (before any specificity
+ strings, e.g., ``.G80_foo`` or ``.H_blah.example.com``
+* The module must have an attribute, ``__export__``, that lists all of
+ the classes, functions, variables, or other symbols you wish to
+ export from the module.
+* ``data``, ``handle_event``, ``name``, and ``specific`` are reserved
+ names. You should not include symbols with a reserved name in
+ ``__export__``. Additionally, including symbols that start with an
+ underscore or double underscore is bad form, and may also produce
+ errors.
+
+See ``examples/TemplateHelper`` for examples of helper modules.
+
+Usage
+=====
+
+Specific helpers can be referred to in
+templates as ``metadata.TemplateHelper[<modulename>]``. That accesses
+a HelperModule object will has, as attributes, all symbols listed in
+``__export__``. For example, consider this helper module::
+
+ __export__ = ["hello"]
+
+ def hello(metadata):
+ return "Hello, %s!" % metadata.hostname
+
+To use this in a TGenshi template, we could do::
+
+ ${metadata.TemplateHelper['hello'].hello(metadata)}
+
+The template would produce::
+
+ Hello, foo.example.com!
+
+Note that the client metadata object is not passed to a helper module
+in any magical way; if you want to access the client metadata object
+in a helper function or class, you must pass the object to the
+function manually.