Move old documentation out of the way

11 files changed, 786 insertions, 0 deletions

diff --git a/old/docs/Makefile b/old/docs/Makefile
new file mode 100644
index 0000000..bf49b54
--- /dev/null
+++ b/old/docs/Makefile
@@ -0,0 +1,130 @@
+# Makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line.
+SPHINXOPTS    =
+SPHINXBUILD   = sphinx-build
+PAPER         =
+BUILDDIR      = _build
+
+# Internal variables.
+PAPEROPT_a4     = -D latex_paper_size=a4
+PAPEROPT_letter = -D latex_paper_size=letter
+ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
+
+.PHONY: help clean html dirhtml singlehtml pickle json htmlhelp qthelp devhelp epub latex latexpdf text man changes linkcheck doctest
+
+help:
+	@echo "Please use \`make <target>' where <target> is one of"
+	@echo "  html       to make standalone HTML files"
+	@echo "  dirhtml    to make HTML files named index.html in directories"
+	@echo "  singlehtml to make a single large HTML file"
+	@echo "  pickle     to make pickle files"
+	@echo "  json       to make JSON files"
+	@echo "  htmlhelp   to make HTML files and a HTML help project"
+	@echo "  qthelp     to make HTML files and a qthelp project"
+	@echo "  devhelp    to make HTML files and a Devhelp project"
+	@echo "  epub       to make an epub"
+	@echo "  latex      to make LaTeX files, you can set PAPER=a4 or PAPER=letter"
+	@echo "  latexpdf   to make LaTeX files and run them through pdflatex"
+	@echo "  text       to make text files"
+	@echo "  man        to make manual pages"
+	@echo "  changes    to make an overview of all changed/added/deprecated items"
+	@echo "  linkcheck  to check all external links for integrity"
+	@echo "  doctest    to run all doctests embedded in the documentation (if enabled)"
+
+clean:
+	-rm -rf $(BUILDDIR)/*
+
+html:
+	$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(BUILDDIR)/html
+	@echo
+	@echo "Build finished. The HTML pages are in $(BUILDDIR)/html."
+
+dirhtml:
+	$(SPHINXBUILD) -b dirhtml $(ALLSPHINXOPTS) $(BUILDDIR)/dirhtml
+	@echo
+	@echo "Build finished. The HTML pages are in $(BUILDDIR)/dirhtml."
+
+singlehtml:
+	$(SPHINXBUILD) -b singlehtml $(ALLSPHINXOPTS) $(BUILDDIR)/singlehtml
+	@echo
+	@echo "Build finished. The HTML page is in $(BUILDDIR)/singlehtml."
+
+pickle:
+	$(SPHINXBUILD) -b pickle $(ALLSPHINXOPTS) $(BUILDDIR)/pickle
+	@echo
+	@echo "Build finished; now you can process the pickle files."
+
+json:
+	$(SPHINXBUILD) -b json $(ALLSPHINXOPTS) $(BUILDDIR)/json
+	@echo
+	@echo "Build finished; now you can process the JSON files."
+
+htmlhelp:
+	$(SPHINXBUILD) -b htmlhelp $(ALLSPHINXOPTS) $(BUILDDIR)/htmlhelp
+	@echo
+	@echo "Build finished; now you can run HTML Help Workshop with the" \
+	      ".hhp project file in $(BUILDDIR)/htmlhelp."
+
+qthelp:
+	$(SPHINXBUILD) -b qthelp $(ALLSPHINXOPTS) $(BUILDDIR)/qthelp
+	@echo
+	@echo "Build finished; now you can run "qcollectiongenerator" with the" \
+	      ".qhcp project file in $(BUILDDIR)/qthelp, like this:"
+	@echo "# qcollectiongenerator $(BUILDDIR)/qthelp/Raclette.qhcp"
+	@echo "To view the help file:"
+	@echo "# assistant -collectionFile $(BUILDDIR)/qthelp/Raclette.qhc"
+
+devhelp:
+	$(SPHINXBUILD) -b devhelp $(ALLSPHINXOPTS) $(BUILDDIR)/devhelp
+	@echo
+	@echo "Build finished."
+	@echo "To view the help file:"
+	@echo "# mkdir -p $$HOME/.local/share/devhelp/Raclette"
+	@echo "# ln -s $(BUILDDIR)/devhelp $$HOME/.local/share/devhelp/Raclette"
+	@echo "# devhelp"
+
+epub:
+	$(SPHINXBUILD) -b epub $(ALLSPHINXOPTS) $(BUILDDIR)/epub
+	@echo
+	@echo "Build finished. The epub file is in $(BUILDDIR)/epub."
+
+latex:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo
+	@echo "Build finished; the LaTeX files are in $(BUILDDIR)/latex."
+	@echo "Run \`make' in that directory to run these through (pdf)latex" \
+	      "(use \`make latexpdf' here to do that automatically)."
+
+latexpdf:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through pdflatex..."
+	make -C $(BUILDDIR)/latex all-pdf
+	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+text:
+	$(SPHINXBUILD) -b text $(ALLSPHINXOPTS) $(BUILDDIR)/text
+	@echo
+	@echo "Build finished. The text files are in $(BUILDDIR)/text."
+
+man:
+	$(SPHINXBUILD) -b man $(ALLSPHINXOPTS) $(BUILDDIR)/man
+	@echo
+	@echo "Build finished. The manual pages are in $(BUILDDIR)/man."
+
+changes:
+	$(SPHINXBUILD) -b changes $(ALLSPHINXOPTS) $(BUILDDIR)/changes
+	@echo
+	@echo "The overview file is in $(BUILDDIR)/changes."
+
+linkcheck:
+	$(SPHINXBUILD) -b linkcheck $(ALLSPHINXOPTS) $(BUILDDIR)/linkcheck
+	@echo
+	@echo "Link check complete; look for any errors in the above output " \
+	      "or in $(BUILDDIR)/linkcheck/output.txt."
+
+doctest:
+	$(SPHINXBUILD) -b doctest $(ALLSPHINXOPTS) $(BUILDDIR)/doctest
+	@echo "Testing of doctests in the sources finished, look at the " \
+	      "results in $(BUILDDIR)/doctest/output.txt."
diff --git a/old/docs/api.rst b/old/docs/api.rst
new file mode 100644
index 0000000..fd746f7
--- /dev/null
+++ b/old/docs/api.rst
@@ -0,0 +1,38 @@
+==========
+Flake8 API
+==========
+
+.. module:: flake8
+
+flake8.engine
+=============
+
+.. autofunction:: flake8.engine.get_parser
+
+.. autofunction:: flake8.engine.get_style_guide
+
+flake8.hooks
+============
+
+.. autofunction:: flake8.hooks.git_hook
+
+.. autofunction:: flake8.hooks.hg_hook
+
+flake8.main
+===========
+
+.. autofunction:: flake8.main.main
+
+.. autofunction:: flake8.main.check_file
+
+.. autofunction:: flake8.main.check_code
+
+.. autoclass:: flake8.main.Flake8Command
+
+flake8.util
+===========
+
+For AST checkers, this module has the ``iter_child_nodes`` function and
+handles compatibility for all versions of Python between 2.5 and 3.3. The
+function was added to the ``ast`` module in Python 2.6 but is redefined in the
+case where the user is running Python 2.5
diff --git a/old/docs/buildout.rst b/old/docs/buildout.rst
new file mode 100644
index 0000000..da9c58a
--- /dev/null
+++ b/old/docs/buildout.rst
@@ -0,0 +1,17 @@
+Buildout integration
+=====================
+
+In order to use Flake8 inside a buildout, edit your buildout.cfg and add this::
+
+    [buildout]
+
+    parts +=
+        ...
+        flake8
+
+    [flake8]
+    recipe = zc.recipe.egg
+    eggs = flake8
+           ${buildout:eggs}
+    entry-points =
+        flake8=flake8.main:main
diff --git a/old/docs/changes.rst b/old/docs/changes.rst
new file mode 100644
index 0000000..43731a7
--- /dev/null
+++ b/old/docs/changes.rst
@@ -0,0 +1,5 @@
+Changes
+=======
+
+.. include:: ../CHANGES.rst
+   :start-line: 3
diff --git a/old/docs/conf.py b/old/docs/conf.py
new file mode 100644
index 0000000..247e44b
--- /dev/null
+++ b/old/docs/conf.py
@@ -0,0 +1,240 @@
+# -*- coding: utf-8 -*-
+#
+# This file is execfile()d with the current directory set to its
+# containing dir.
+#
+# Note that not all possible configuration values are present in this
+# autogenerated file.
+#
+# All configuration values have a default; values that are commented out
+# serve to show the default.
+
+import sys
+import os
+
+# This environment variable makes decorators not decorate functions, so their
+# signatures in the generated documentation are still correct
+os.environ['GENERATING_DOCUMENTATION'] = "flake8"
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+sys.path.insert(0, os.path.abspath('..'))
+import flake8
+
+# -- General configuration ----------------------------------------------------
+
+# If your documentation needs a minimal Sphinx version, state it here.
+#needs_sphinx = '1.0'
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
+extensions = ['sphinx.ext.autodoc']
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ['_templates']
+
+# The suffix of source filenames.
+source_suffix = '.rst'
+
+# The encoding of source files.
+#source_encoding = 'utf-8-sig'
+
+# The master toctree document.
+master_doc = 'index'
+
+# General information about the project.
+project = u'flake8'
+copyright = u'2012-2013 - Tarek Ziade, Ian Cordasco, Florent Xicluna'
+
+# The version info for the project you're documenting, acts as replacement for
+# |version| and |release|, also used in various other places throughout the
+# built documents.
+#
+# The short X.Y version.
+version = flake8.__version__
+# The full version, including alpha/beta/rc tags.
+release = version
+
+# The language for content autogenerated by Sphinx. Refer to documentation
+# for a list of supported languages.
+#language = None
+
+# There are two options for replacing |today|: either, you set today to some
+# non-false value, then it is used:
+#today = ''
+# Else, today_fmt is used as the format for a strftime call.
+#today_fmt = '%B %d, %Y'
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+exclude_patterns = ['_build']
+
+# The reST default role (used for this markup: `text`) to use for
+# all documents.
+#default_role = None
+
+# If true, '()' will be appended to :func: etc. cross-reference text.
+#add_function_parentheses = True
+
+# If true, the current module name will be prepended to all description
+# unit titles (such as .. function::).
+#add_module_names = True
+
+# If true, sectionauthor and moduleauthor directives will be shown in the
+# output. They are ignored by default.
+#show_authors = False
+
+# The name of the Pygments (syntax highlighting) style to use.
+# pygments_style = 'flask_theme_support.FlaskyStyle'
+
+# A list of ignored prefixes for module index sorting.
+#modindex_common_prefix = []
+
+
+# -- Options for HTML output --------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+#html_theme = 'nature'
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further.  For a list of options available for each theme, see the
+# documentation.
+#html_theme_options = {}
+
+# Add any paths that contain custom themes here, relative to this directory.
+#html_theme_path = []
+
+# The name for this set of Sphinx documents.  If None, it defaults to
+# "<project> v<release> documentation".
+#html_title = None
+
+# A shorter title for the navigation bar.  Default is the same as html_title.
+#html_short_title = None
+
+# The name of an image file (relative to this directory) to place at the top
+# of the sidebar.
+#html_logo = None
+
+# The name of an image file (within the static path) to use as favicon of the
+# docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x32
+# pixels large.
+#html_favicon = None
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+#html_static_path = ['_static']
+
+# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
+# using the given strftime format.
+#html_last_updated_fmt = '%b %d, %Y'
+
+# If true, SmartyPants will be used to convert quotes and dashes to
+# typographically correct entities.
+#html_use_smartypants = True
+
+# Custom sidebar templates, maps document names to template names.
+#html_sidebars = {}
+
+# Additional templates that should be rendered to pages, maps page names to
+# template names.
+#html_additional_pages = {}
+
+# If false, no module index is generated.
+#html_domain_indices = True
+
+# If false, no index is generated.
+#html_use_index = True
+
+# If true, the index is split into individual pages for each letter.
+#html_split_index = False
+
+# If true, links to the reST sources are added to the pages.
+#html_show_sourcelink = False
+
+# If true, "Created using Sphinx" is shown in the HTML footer. Default is True.
+#html_show_sphinx = False
+
+# If true, "(C) Copyright ..." is shown in the HTML footer. Default is True.
+#html_show_copyright = True
+
+# If true, an OpenSearch description file will be output, and all pages will
+# contain a <link> tag referring to it.  The value of this option must be the
+# base URL from which the finished HTML is served.
+#html_use_opensearch = ''
+
+# This is the file name suffix for HTML files (e.g. ".xhtml").
+#html_file_suffix = None
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = 'flake8_doc'
+
+
+# -- Options for LaTeX output -------------------------------------------------
+
+# The paper size ('letter' or 'a4').
+#latex_paper_size = 'letter'
+
+# The font size ('10pt', '11pt' or '12pt').
+#latex_font_size = '10pt'
+
+# Grouping the document tree into LaTeX files. List of tuples
+# (source start file, target name, title,
+#  author, documentclass [howto/manual]).
+latex_documents = [
+    ('index', 'flake8.tex', u'flake8 Documentation',
+     u'Tarek Ziade', 'manual'),
+]
+
+# The name of an image file (relative to this directory) to place at the top of
+# the title page.
+#latex_logo = None
+
+# For "manual" documents, if this is true, then toplevel headings are parts,
+# not chapters.
+#latex_use_parts = False
+
+# If true, show page references after internal links.
+#latex_show_pagerefs = False
+
+# If true, show URL addresses after external links.
+#latex_show_urls = False
+
+# Additional stuff for the LaTeX preamble.
+#latex_preamble = ''
+
+# Documents to append as an appendix to all manuals.
+#latex_appendices = []
+
+# If false, no module index is generated.
+#latex_domain_indices = True
+
+
+# -- Options for manual page output -------------------------------------------
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    ('index', 'flake8', u'flake8 Documentation',
+     [u'Tarek Ziade', u'Ian Cordasco', u'Florent Xicluna'], 1)
+]
+
+# If true, show URL addresses after external links.
+#man_show_urls = False
+
+
+# -- Options for Texinfo output -----------------------------------------------
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+texinfo_documents = [
+    ('index', 'flake8', u'flake8 Documentation', u'Tarek Ziade',
+     'flake8', 'Code checking using pep8, pyflakes and mccabe',
+     'Miscellaneous'),
+]
+
+# Documents to append as an appendix to all manuals.
+texinfo_appendices = []
diff --git a/old/docs/config.rst b/old/docs/config.rst
new file mode 100644
index 0000000..59ba3ec
--- /dev/null
+++ b/old/docs/config.rst
@@ -0,0 +1,55 @@
+Configuration
+=============
+
+The behaviour may be configured at two levels.
+
+Global
+------
+
+The user settings are read from the ``~/.config/flake8`` file (or the ``~/.flake8`` file on Windows).
+Example::
+
+  [flake8]
+  ignore = E226,E302,E41
+  max-line-length = 160
+  exclude = tests/*
+  max-complexity = 10
+
+Per-Project
+-----------
+
+At the project level, the ``tox.ini``, ``setup.cfg``, ``.pep8`` or ``.flake8``
+files are read if present.  Only the first file is considered.  If this file
+does not have a ``[flake8]`` section, no project specific configuration is
+loaded.
+
+Default
+-------
+
+If the ``ignore`` option is not in the configuration and not in the arguments,
+only the error codes ``E123/E133``, ``E226`` and ``E241/E242`` are ignored
+(see the :ref:`warning and error codes <error-codes>`).
+
+Settings
+--------
+
+This is a (likely incomplete) list of settings that can be used in your config
+file. In general, any settings that pep8 supports we also support and we add
+the ability to set ``max-complexity`` as well.
+
+- ``exclude``: comma-separated filename and glob patterns
+  default: ``.svn,CVS,.bzr,.hg,.git,__pycache``
+
+- ``filename``: comma-separated filename and glob patterns
+  default: ``*.py``
+
+- ``select``: select errors and warnings to enable which are off by default
+
+- ``ignore``: skip errors or warnings
+
+- ``max-line-length``: set maximum allowed line length
+  default: 79
+
+- ``format``: set the error format
+
+- ``max-complexity``: McCabe complexity threshold
diff --git a/old/docs/extensions.rst b/old/docs/extensions.rst
new file mode 100644
index 0000000..9e89fb1
--- /dev/null
+++ b/old/docs/extensions.rst
@@ -0,0 +1,149 @@
+Writing an Extension for Flake8
+===============================
+
+Since Flake8 is now adding support for extensions, we require ``setuptools``
+so we can manage extensions through entry points. If you are making an
+existing tool compatible with Flake8 but do not already require
+``setuptools``, you should probably add it to your list of requirements. Next,
+you'll need to edit your ``setup.py`` file so that upon installation, your
+extension is registered. If you define a class called ``PackageEntryClass``
+then this would look something like the following::
+
+
+    setup(
+        # ...
+        entry_points={
+            'flake8.extension': ['P10 = package.PackageEntryClass'],
+        }
+        # ...
+    )
+
+
+If you intend to publish your extension, choose a unique code prefix
+following the convention for :ref:`error codes <error-codes>`.
+In addition, you can open a request in the `issue tracker
+<https://bitbucket.org/tarek/flake8/issues>`_ to register the prefix in the
+documentation.
+
+.. TODO: describe the API required for the 3 kind of extensions:
+   * physical line checkers
+   * logical line checkers
+   * AST checkers
+
+
+A real example: McCabe
+----------------------
+
+Below is an example from mccabe_ for how to write your ``setup.py`` file for
+your Flake8 extension.
+
+.. code-block:: python
+
+    # https://github.com/flintwork/mccabe/blob/0.2/setup.py#L38:L42
+    # -*- coding: utf-8 -*-
+    from setuptools import setup
+
+    # ...
+
+    setup(
+        name='mccabe',
+
+        # ...
+
+        install_requires=[
+            'setuptools',
+        ],
+        entry_points={
+            'flake8.extension': [
+                'C90 = mccabe:McCabeChecker',
+            ],
+        },
+
+        # ...
+
+    )
+
+In ``mccabe.py`` you can see that extra options are added to the parser when
+flake8 registers the extension:
+
+.. code-block:: python
+
+    # https://github.com/flintwork/mccabe/blob/0.2/mccabe.py#L225:L254
+    class McCabeChecker(object):
+        """McCabe cyclomatic complexity checker."""
+        name = 'mccabe'
+        version = __version__
+        _code = 'C901'
+        _error_tmpl = "C901 %r is too complex (%d)"
+        max_complexity = 0
+
+        def __init__(self, tree, filename):
+            self.tree = tree
+
+        @classmethod
+        def add_options(cls, parser):
+            parser.add_option('--max-complexity', default=-1, action='store',
+                              type='int', help="McCabe complexity threshold")
+            parser.config_options.append('max-complexity')
+
+        @classmethod
+        def parse_options(cls, options):
+            cls.max_complexity = options.max_complexity
+
+        def run(self):
+            if self.max_complexity < 0:
+                return
+            visitor = PathGraphingAstVisitor()
+            visitor.preorder(self.tree, visitor)
+            for graph in visitor.graphs.values():
+                if graph.complexity() >= self.max_complexity:
+                    text = self._error_tmpl % (graph.entity, graph.complexity())
+                    yield graph.lineno, 0, text, type(self)
+
+Since that is the defined entry point in the above ``setup.py``, flake8 finds
+it and uses it to register the extension.
+
+If we wanted the extension or a check to be optional, you can add
+``off_by_default = True`` to our entry point. For example, we could
+update ``mccabe.py`` with this variable as shown below:
+
+.. code-block:: python
+
+    # https://github.com/flintwork/mccabe/blob/0.2/mccabe.py#L225:L254
+    class McCabeChecker(object):
+        """McCabe cyclomatic complexity checker."""
+        name = 'mccabe'
+        version = __version__
+        off_by_default = True
+
+If we wanted to run the optional extension or check, we need to specify the
+error and warnings via the ``--enable-extension`` command line argument. In our
+case, we could run ``flake8 --enable-extension=C90`` which would enable our
+off_by_default example version of the mccabe extension.
+
+
+Existing Extensions
+===================
+
+This is not at all a comprehensive listing of existing extensions but simply a 
+listing of the ones we are aware of:
+
+* `flake8-debugger <https://github.com/JBKahn/flake8-debugger>`_
+
+* `flake8-immediate <https://github.com/schlamar/flake8-immediate>`_
+
+* `flake8-print <https://github.com/JBKahn/flake8-print>`_
+  
+* `flake8-todo <https://github.com/schlamar/flake8-todo>`_
+
+* `pep8-naming <https://github.com/flintwork/pep8-naming>`_
+
+* `radon <https://github.com/rubik/radon>`_
+
+* `flake8-import-order <https://github.com/public/flake8-import-order>`_
+
+* `flake8-respect-noqa <https://pypi.python.org/pypi/flake8-respect-noqa>`_
+
+.. links
+.. _mccabe: https://github.com/flintwork/mccabe
+.. _PyPI: https://pypi.python.org/pypi/
diff --git a/old/docs/index.rst b/old/docs/index.rst
new file mode 100644
index 0000000..e2dc514
--- /dev/null
+++ b/old/docs/index.rst
@@ -0,0 +1,26 @@
+.. include:: ../README.rst
+
+
+Documentation
+=============
+
+.. toctree::
+
+    config
+    warnings
+    vcs
+    buildout
+    setuptools
+    api
+    extensions
+    changes
+
+Original Projects
+=================
+
+Flake8 is just a glue project, all the merits go to the creators of the original
+projects:
+
+- pep8: https://github.com/jcrocholl/pep8
+- PyFlakes: https://launchpad.net/pyflakes
+- McCabe: http://nedbatchelder.com/blog/200803/python_code_complexity_microtool.html
diff --git a/old/docs/setuptools.rst b/old/docs/setuptools.rst
new file mode 100644
index 0000000..8bc080d
--- /dev/null
+++ b/old/docs/setuptools.rst
@@ -0,0 +1,25 @@
+Setuptools integration
+======================
+
+Upon installation, Flake8 enables a setuptools command that checks Python 
+files declared by your project. 
+
+Running ``python setup.py flake8`` on the command line will check the files 
+listed in your ``py_modules`` and ``packages``.  If any warning is found, 
+the command will exit with an error code::
+
+    $ python setup.py flake8
+
+Also, to allow users to be able to use the command without having to install 
+flake8 themselves, add flake8 to the setup_requires of your setup() like so::
+
+    setup(
+        name="project",
+        packages=["project"],
+
+        setup_requires=[
+            "flake8"
+        ]
+    )
+
+
diff --git a/old/docs/vcs.rst b/old/docs/vcs.rst
new file mode 100644
index 0000000..66538b4
--- /dev/null
+++ b/old/docs/vcs.rst
@@ -0,0 +1,50 @@
+VCS Hooks
+=========
+
+flake8 can install hooks for Mercurial and Git so that flake8 is run
+automatically before commits. The commit will fail if there are any
+flake8 issues.
+
+You can install the hook by issuing this command in the root of your
+project::
+
+  $ flake8 --install-hook
+
+In the case of Git, the hook won't be installed if a custom
+``pre-commit`` hook file is already present in
+the ``.git/hooks`` directory.
+
+You can control the behavior of the pre-commit hook using configuration file
+settings or environment variables:
+
+``flake8.complexity`` or ``FLAKE8_COMPLEXITY``
+  Any value > 0 enables complexity checking with McCabe. (defaults
+  to 10)
+
+``flake8.strict`` or ``FLAKE8_STRICT``
+  If True, this causes the commit to fail in case of any errors at
+  all. (defaults to False)
+
+``flake8.ignore`` or ``FLAKE8_IGNORE``
+  Comma-separated list of errors and warnings to ignore.  (defaults to
+  empty)
+
+``flake8.lazy`` or ``FLAKE8_LAZY``
+  If True, also scans those files not added to the index before
+  commit. (defaults to False)
+
+You can set these either through the git command line
+
+.. code-block:: bash-session
+
+    $ git config flake8.complexity 10
+    $ git config flake8.strict true
+
+Or by directly editing ``.git/config`` and adding a section like
+
+.. code-block:: ini
+
+    [flake8]
+        complexity = 10
+        strict = true
+        lazy = false
diff --git a/old/docs/warnings.rst b/old/docs/warnings.rst
new file mode 100644
index 0000000..b4b7fb1
--- /dev/null
+++ b/old/docs/warnings.rst
@@ -0,0 +1,51 @@
+.. _error-codes:
+
+Warning / Error codes
+=====================
+
+The convention of Flake8 is to assign a code to each error or warning, like
+the ``pep8`` tool.  These codes are used to configure the list of errors
+which are selected or ignored.
+
+Each code consists of an upper case ASCII letter followed by three digits.
+The recommendation is to use a different prefix for each plugin. A list of the
+known prefixes is published below:
+
+- ``E***``/``W***``: `pep8 errors and warnings
+  <http://pep8.readthedocs.org/en/latest/intro.html#error-codes>`_
+- ``F***``: PyFlakes codes (see below)
+- ``C9**``: McCabe complexity plugin `mccabe
+  <https://github.com/flintwork/mccabe>`_
+- ``N8**``: Naming Conventions plugin `pep8-naming
+  <https://github.com/flintwork/pep8-naming>`_
+
+
+The original PyFlakes does not provide error codes.  Flake8 patches the
+PyFlakes messages to add the following codes:
+
++------+--------------------------------------------------------------------+
+| code | sample message                                                     |
++======+====================================================================+
+| F401 | ``module`` imported but unused                                     |
++------+--------------------------------------------------------------------+
+| F402 | import ``module`` from line ``N`` shadowed by loop variable        |
++------+--------------------------------------------------------------------+
+| F403 | 'from ``module`` import \*' used; unable to detect undefined names |
++------+--------------------------------------------------------------------+
+| F404 | future import(s) ``name`` after other statements                   |
++------+--------------------------------------------------------------------+
++------+--------------------------------------------------------------------+
+| F811 | redefinition of unused ``name`` from line ``N``                    |
++------+--------------------------------------------------------------------+
+| F812 | list comprehension redefines ``name`` from line ``N``              |
++------+--------------------------------------------------------------------+
+| F821 | undefined name ``name``                                            |
++------+--------------------------------------------------------------------+
+| F822 | undefined name ``name`` in __all__                                 |
++------+--------------------------------------------------------------------+
+| F823 | local variable ``name`` ... referenced before assignment           |
++------+--------------------------------------------------------------------+
+| F831 | duplicate argument ``name`` in function definition                 |
++------+--------------------------------------------------------------------+
+| F841 | local variable ``name`` is assigned to but never used              |
++------+--------------------------------------------------------------------+