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-rw-r--r--doc/config.rst4
-rw-r--r--doc/plugin.rst38
2 files changed, 40 insertions, 2 deletions
diff --git a/doc/config.rst b/doc/config.rst
index f5bc06a1..df703ba9 100644
--- a/doc/config.rst
+++ b/doc/config.rst
@@ -11,6 +11,7 @@ Configuration files
.. :history: 20110827T212700, updated for 3.5.1
.. :history: 20130926T222300, updated for 3.6.1
.. :history: 20140925T064700, updated for 4.0a1
+.. :history: 20150124T173400, updated for 4.0a4
Coverage.py options can be specified in a configuration file. This makes it
@@ -126,6 +127,9 @@ of measurement or reporting. See :ref:`source` for details.
id and random number to the data file name to simplify collecting data from
many processes. See :ref:`cmd_combining` for more information.
+``plugins`` (multi-string): a list of plugin package names. See :ref:`plugins`
+for more information.
+
``source`` (multi-string): a list of packages or directories, the source to
measure during execution. See :ref:`source` for details.
diff --git a/doc/plugin.rst b/doc/plugin.rst
index ba053242..d8f4ef56 100644
--- a/doc/plugin.rst
+++ b/doc/plugin.rst
@@ -1,4 +1,4 @@
-.. _plugin:
+.. _plugins:
=======
Plugins
@@ -6,8 +6,42 @@ Plugins
.. :history: 20150124T143000, new page.
+Coverage.py's behavior can be extended by writing plugins. A plugin is a
+separately installed Python class that you register in your .coveragerc.
+Plugins can be used to implement coverage measurement for non-Python files.
-.. automodule:: coverage.plugin
+Using plugins
+-------------
+
+To use a coverage.py plugin, you install it, and configure it. For this
+example, let's say you want to use one called fred_plugin.
+
+#. Install the plugin as you would any other Python package::
+
+ pip install fred_plugin
+
+#. Configure coverage.py to use the plugin. You do this by editing (or
+ creating) your .coveragerc file, as described in :ref:`config`. The
+ ``plugins`` setting indicates your plugin::
+
+ [run]
+ plugins =
+ fred_plugin
+
+#. Run your tests as you usually would. NOTE: You will see a warning when
+ coverage starts::
+
+ Coverage.py warning: Setting timid=True to support plugins.
+
+ This means that coverage will run slower than it usually would. This
+ limitation is part of the initial alpha release, it will be gone in the
+ final version.
+
+
+Plugin API
+----------
+
+.. module:: coverage.plugin
.. autoclass:: CoveragePlugin
:members: