Add a script for finding bare plugin :ref:s

We're porting autogenerated plugin docs so that :ref: targets are
namespaced by plugin type.  To do this effectively, we need to know
where all the :ref: targets which refer to the bare plugin names are in
the rst files.  This script will find those.

docs/bin/find-plugin-refs.py

@@ -0,0 +1,89 @@
+#!/usr/bin/python3 -tt
+
+# To run this script, first make webdocs in the toplevel of the checkout.  This will generate all
+# rst files from their sources.  Then run this script ./docs/bin/find-plugin-refs.py
+#
+# No output means that there are no longer any bare module and plugin names referenced via :ref:
+#
+# For my listing of what needs to be changed after running this script, see the comment at the end
+# of the file
+
+
+import glob
+import os
+import re
+
+from ansible.module_utils._text import to_text
+
+
+TOPDIR=os.path.join(os.path.dirname(__file__), '..', 'docsite', 'rst')
+
+
+def plugin_names(topdir):
+    plugins = set()
+
+    # Modules are in a separate directory
+    for module_filename in glob.glob(os.path.join(topdir, 'modules', '*_module.rst')):
+        module_filename = os.path.basename(module_filename)
+        module_name = module_filename[:module_filename.index('_module.rst')]
+        plugins.add(module_name)
+
+    for plugin_filename in glob.glob(os.path.join(topdir, 'plugins', '*', '*.rst')):
+        plugin_filename = os.path.basename(plugin_filename)
+        plugin_name = plugin_filename[:plugin_filename.index('.rst')]
+        plugins.add(plugin_name)
+
+    return plugins
+
+
+def process_refs(topdir, plugin_names):
+    REF_RE = re.compile(':ref:`([^`]*)`')
+    LABEL_RE = re.compile('<[^>]*>`$')
+
+    # Walk the whole docs tree looking for :ref:.  Anywhere those are found, search for `([^`]*)`
+    for dirpath, dirnames, filenames in os.walk(topdir):
+        for filename in filenames:
+            with open(os.path.join(dirpath, filename), 'rb') as f:
+                data = f.read()
+                data = to_text(data)
+                for ref_match in re.finditer(REF_RE, data):
+                    label = ref_match.group(1)
+
+                    # If the ref label includes "<", then search for the label inside of the "<>"
+                    label_match = re.search(LABEL_RE, label)
+                    if label_match:
+                        label = label_match.group(1)
+
+                    # If the ref label is listed in plugins, then print that the file contains an unported ref
+                    if label in plugin_names:
+                        print(':ref:`{0}` matching plugin {1} was found in {2}'.format(ref_match.group(1), label, os.path.join(dirpath, filename)))
+
+        #for directory in dirnames:
+            #process_refs(os.path.join(topdir, directory), plugin_names)
+
+
+
+if __name__ == '__main__':
+
+    plugins = plugin_names(TOPDIR)
+
+    process_refs(TOPDIR, plugins)
+
+    # Fixes needed: docs/bin/plugin_formatter.py
+    # - t = _MODULE.sub(r":ref:`\1 <\1>`", t)
+    # + t = _MODULE.sub(r":ref:`\1 <module_\1>`", t)
+    #
+    # These have @{module}@ in the template and need to have something like module_@{module}@
+    # If any of these list plugins as well as modules, they will need to have a conditional or extra
+    # data passed in to handle that in a generic fashion:
+    #
+    # docs/templates/list_of_CATEGORY_modules.rst.j2
+    # docs/templates/list_of_CATEGORY_plugins.rst.j2
+    # docs/templates/modules_by_support.rst.j2
+    #
+    # These are just a simple manual fix:
+    # :ref:`command` matching plugin command was found in ./../docsite/rst/user_guide/intro_adhoc.rst
+    # :ref:`shell` matching plugin shell was found in ./../docsite/rst/user_guide/intro_adhoc.rst
+    # :ref:`config` matching plugin config was found in ./../docsite/rst/installation_guide/intro_configuration.rst
+
+