Add documentation ... for writing documentation

3 files changed, 188 insertions, 2 deletions

diff --git a/docs/source/internal/contributing.rst b/docs/source/internal/contributing.rst
index 06e6ec3..29afc6a 100644
--- a/docs/source/internal/contributing.rst
+++ b/docs/source/internal/contributing.rst
@@ -93,8 +93,10 @@ Contributing Documentation
 ==========================
 
 To contribute to |Flake8|'s documentation, you might want to first read a
-little about reStructuredText or Sphinx. For the most part, you should be fine
-following the structure and style of the rest of |Flake8|'s documentation.
+little about reStructuredText or Sphinx. |Flake8| has a :ref:`guide of best
+practices <docs-style>` when contributing to our documentation. For the most
+part, you should be fine following the structure and style of the rest of
+|Flake8|'s documentation.
 
 All of |Flake8|'s documentation is written in reStructuredText and rendered by
 Sphinx. The source (reStructuredText) lives in ``docs/source/``. To build
diff --git a/docs/source/internal/index.rst b/docs/source/internal/index.rst
index d4d05ac..796a3ba 100644
--- a/docs/source/internal/index.rst
+++ b/docs/source/internal/index.rst
@@ -16,6 +16,7 @@ pull gently.
     :maxdepth: 2
 
     contributing
+    writing-documentation
     checker
     cli
     formatters
diff --git a/docs/source/internal/writing-documentation.rst b/docs/source/internal/writing-documentation.rst
new file mode 100644
index 0000000..920b411
--- /dev/null
+++ b/docs/source/internal/writing-documentation.rst
@@ -0,0 +1,183 @@
+.. _docs-style:
+
+==================================
+ Writing Documentation for Flake8
+==================================
+
+The maintainers of |Flake8| believe strongly in benefit of style guides.
+Hence, for all contributors who wish to work on our documentation, we've
+put together a loose set of guidelines and best practices when adding to
+our documentation.
+
+
+View the docs locally before submitting
+=======================================
+
+You can and should generate the docs locally before you submit a pull request
+with your changes. You can build the docs by running:
+
+.. prompt:: bash
+
+    tox -e docs
+
+From the directory containing the ``tox.ini`` file (which also contains the
+``docs/`` directory that this file lives in).
+
+.. note::
+
+    If the docs don't build locally, they will not build in our continuous
+    integration system. We will generally not merge any pull request that
+    fails continuous integration.
+
+
+Run the docs linter tests before submitting
+===========================================
+
+You should run the ``doc8`` linter job before you're ready to commit and fix
+any errors found.
+
+
+Capitalize Flake8 in prose
+==========================
+
+We believe that by capitalizing |Flake8| in prose, we can help reduce
+confusion between the command-line usage of ``flake8`` and the project.
+
+We also have defined a global replacement ``|Flake8|`` that should be used
+and will replace each instance with ``:program:`Flake8```. 
+
+
+Use the prompt directive for command-line examples
+==================================================
+
+When documenting something on the command-line, use the ``.. prompt::``
+directive to make it easier for users to copy and paste into their terminal.
+
+Example:
+
+.. code-block:: restructuredtext
+
+    .. prompt:: bash
+
+        flake8 --select E123,W503 dir/
+        flake8 --ignore E24,W504 dir
+
+
+Wrap lines around 79 characters
+===============================
+
+We use a maximum line-length in our documentation that is similar to the
+default in |Flake8|. Please wrap lines at 79 characters (or less).
+
+
+Use two new-lines before new sections
+=====================================
+
+After the final paragraph of a section and before the next section title,
+use two new-lines to separate them. This makes reading the plain-text
+document a little nicer. Sphinx ignores these when rendering so they have
+no semantic meaning.
+
+Example:
+
+.. code-block:: restructuredtext
+
+    Section Header
+    ==============
+
+    Paragraph.
+
+
+    Next Section Header
+    ===================
+
+    Paragraph.
+
+
+Surround document titles with equal symbols
+===========================================
+
+To indicate the title of a document, we place an equal number of ``=`` symbols
+on the lines before and after the title. For example:
+
+.. code-block:: restructuredtext
+
+    ==================================
+     Writing Documentation for Flake8
+    ==================================
+
+Note also that we "center" the title by adding a leading space and having
+extra ``=`` symbols at the end of those lines.
+
+
+Use the option template for new options
+=======================================
+
+All of |Flake8|'s command-line options are documented in the User Guide. Each
+option is documented individually using the ``.. option::`` directive provided
+by Sphinx. At the top of the document, in a reStructuredText comment, is a
+template that should be copied and pasted into place when documening new
+options.
+
+.. note::
+
+    The ordering of the options page is the order that options are printed
+    in the output of:
+
+    .. prompt:: bash
+
+        flake8 --help
+
+    Please insert your option documentation according to that order.
+
+
+Use anchors for easy reference linking
+======================================
+
+Use link anchors to allow for other areas of the documentation to use the
+``:ref:`` role for intralinking documentation. Example:
+
+.. code-block:: restructuredtext
+
+    .. _use-anchors:
+
+    Use anchors for easy reference linking
+    ======================================
+
+.. code-block:: restructuredtext
+
+    Somewhere in this paragraph we will :ref:`reference anchors
+    <use-anchors>`.
+
+.. note::
+
+    You do not need to provide custom text for the ``:ref:`` if the title of
+    the section has a title that is sufficient.
+
+
+Keep your audience in mind
+==========================
+
+|Flake8|'s documentation has three distinct (but not separate) audiences:
+
+#. Users
+
+#. Plugin Developers
+
+#. Flake8 Developers and Contributors
+
+At the moment, you're one of the third group (because you're contributing
+or thinking of contributing).
+
+Consider that most Users aren't very interested in the internal working of
+|Flake8|. When writing for Users, focus on how to do something or the
+behaviour of a certain piece of configuration or invocation.
+
+Plugin developers will only care about the internals of |Flake8| as much as
+they will have to interact with that. Keep discussions of internal to the
+mininmum required.
+
+Finally, Flake8 Developers and Contributors need to know how everything fits
+together. We don't need detail about every line of code, but cogent 
+explanations and design specifications will help future developers understand
+the Hows and Whys of |Flake8|'s internal design.