Add extension for Django docs

docs/_ext/djangodocs.py

+"""
+Sphinx plugins for Django documentation.
+"""
+import json
+import os
+import re
+
+from docutils import nodes, transforms
+
+from sphinx import addnodes, roles, __version__ as sphinx_ver
+from sphinx.builders.html import StandaloneHTMLBuilder
+from sphinx.writers.html import SmartyPantsHTMLTranslator
+from sphinx.util.console import bold
+from sphinx.util.compat import Directive
+
+# RE for option descriptions without a '--' prefix
+simple_option_desc_re = re.compile(
+    r'([-_a-zA-Z0-9]+)(\s*.*?)(?=,\s+(?:/|-|--)|$)')
+
+def setup(app):
+    app.add_crossref_type(
+        directivename = "setting",
+        rolename      = "setting",
+        indextemplate = "pair: %s; setting",
+    )
+    app.add_crossref_type(
+        directivename = "templatetag",
+        rolename      = "ttag",
+        indextemplate = "pair: %s; template tag"
+    )
+    app.add_crossref_type(
+        directivename = "templatefilter",
+        rolename      = "tfilter",
+        indextemplate = "pair: %s; template filter"
+    )
+    app.add_crossref_type(
+        directivename = "fieldlookup",
+        rolename      = "lookup",
+        indextemplate = "pair: %s; field lookup type",
+    )
+    app.add_description_unit(
+        directivename = "django-admin",
+        rolename      = "djadmin",
+        indextemplate = "pair: %s; django-admin command",
+        parse_node    = parse_django_admin_node,
+    )
+    app.add_description_unit(
+        directivename = "django-admin-option",
+        rolename      = "djadminopt",
+        indextemplate = "pair: %s; django-admin command-line option",
+        parse_node    = parse_django_adminopt_node,
+    )
+    app.add_config_value('django_next_version', '0.0', True)
+    app.add_directive('versionadded', VersionDirective)
+    app.add_directive('versionchanged', VersionDirective)
+    app.add_builder(DjangoStandaloneHTMLBuilder)
+
+
+class VersionDirective(Directive):
+    has_content = True
+    required_arguments = 1
+    optional_arguments = 1
+    final_argument_whitespace = True
+    option_spec = {}
+
+    def run(self):
+        env = self.state.document.settings.env
+        arg0 = self.arguments[0]
+        is_nextversion = env.config.django_next_version == arg0
+        ret = []
+        node = addnodes.versionmodified()
+        ret.append(node)
+        if not is_nextversion:
+            if len(self.arguments) == 1:
+                linktext = 'Please see the release notes </releases/%s>' % (arg0)
+                xrefs = roles.XRefRole()('doc', linktext, linktext, self.lineno, self.state)
+                node.extend(xrefs[0])
+            node['version'] = arg0
+        else:
+            node['version'] = "Development version"
+        node['type'] = self.name
+        if len(self.arguments) == 2:
+            inodes, messages = self.state.inline_text(self.arguments[1], self.lineno+1)
+            node.extend(inodes)
+            if self.content:
+                self.state.nested_parse(self.content, self.content_offset, node)
+            ret = ret + messages
+        env.note_versionchange(node['type'], node['version'], node, self.lineno)
+        return ret
+
+
+class DjangoHTMLTranslator(SmartyPantsHTMLTranslator):
+    """
+    Django-specific reST to HTML tweaks.
+    """
+
+    # Don't use border=1, which docutils does by default.
+    def visit_table(self, node):
+        self._table_row_index = 0 # Needed by Sphinx
+        self.body.append(self.starttag(node, 'table', CLASS='docutils'))
+
+    # <big>? Really?
+    def visit_desc_parameterlist(self, node):
+        self.body.append('(')
+        self.first_param = 1
+        self.param_separator = node.child_text_separator
+
+    def depart_desc_parameterlist(self, node):
+        self.body.append(')')
+
+    if sphinx_ver < '1.0.8':
+        #
+        # Don't apply smartypants to literal blocks
+        #
+        def visit_literal_block(self, node):
+            self.no_smarty += 1
+            SmartyPantsHTMLTranslator.visit_literal_block(self, node)
+
+        def depart_literal_block(self, node):
+            SmartyPantsHTMLTranslator.depart_literal_block(self, node)
+            self.no_smarty -= 1
+
+    #
+    # Turn the "new in version" stuff (versionadded/versionchanged) into a
+    # better callout -- the Sphinx default is just a little span,
+    # which is a bit less obvious that I'd like.
+    #
+    # FIXME: these messages are all hardcoded in English. We need to change
+    # that to accomodate other language docs, but I can't work out how to make
+    # that work.
+    #
+    version_text = {
+        'deprecated':       'Deprecated in Django %s',
+        'versionchanged':   'Changed in Django %s',
+        'versionadded':     'New in Django %s',
+    }
+
+    def visit_versionmodified(self, node):
+        self.body.append(
+            self.starttag(node, 'div', CLASS=node['type'])
+        )
+        title = "%s%s" % (
+            self.version_text[node['type']] % node['version'],
+            len(node) and ":" or "."
+        )
+        self.body.append('<span class="title">%s</span> ' % title)
+
+    def depart_versionmodified(self, node):
+        self.body.append("</div>\n")
+
+    # Give each section a unique ID -- nice for custom CSS hooks
+    def visit_section(self, node):
+        old_ids = node.get('ids', [])
+        node['ids'] = ['s-' + i for i in old_ids]
+        node['ids'].extend(old_ids)
+        SmartyPantsHTMLTranslator.visit_section(self, node)
+        node['ids'] = old_ids
+
+def parse_django_admin_node(env, sig, signode):
+    command = sig.split(' ')[0]
+    env._django_curr_admin_command = command
+    title = "django-admin.py %s" % sig
+    signode += addnodes.desc_name(title, title)
+    return sig
+
+def parse_django_adminopt_node(env, sig, signode):
+    """A copy of sphinx.directives.CmdoptionDesc.parse_signature()"""
+    from sphinx.domains.std import option_desc_re
+    count = 0
+    firstname = ''
+    for m in option_desc_re.finditer(sig):
+        optname, args = m.groups()
+        if count:
+            signode += addnodes.desc_addname(', ', ', ')
+        signode += addnodes.desc_name(optname, optname)
+        signode += addnodes.desc_addname(args, args)
+        if not count:
+            firstname = optname
+        count += 1
+    if not count:
+        for m in simple_option_desc_re.finditer(sig):
+            optname, args = m.groups()
+            if count:
+                signode += addnodes.desc_addname(', ', ', ')
+            signode += addnodes.desc_name(optname, optname)
+            signode += addnodes.desc_addname(args, args)
+            if not count:
+                firstname = optname
+            count += 1
+    if not firstname:
+        raise ValueError
+    return firstname
+
+
+class DjangoStandaloneHTMLBuilder(StandaloneHTMLBuilder):
+    """
+    Subclass to add some extra things we need.
+    """
+
+    name = 'djangohtml'
+
+    def finish(self):
+        super(DjangoStandaloneHTMLBuilder, self).finish()
+        self.info(bold("writing templatebuiltins.js..."))
+        xrefs = self.env.domaindata["std"]["objects"]
+        templatebuiltins = {
+            "ttags": [n for ((t, n), (l, a)) in xrefs.items()
+                        if t == "templatetag" and l == "ref/templates/builtins"],
+            "tfilters": [n for ((t, n), (l, a)) in xrefs.items()
+                        if t == "templatefilter" and l == "ref/templates/builtins"],
+        }
+        outfilename = os.path.join(self.outdir, "templatebuiltins.js")
+        with open(outfilename, 'wb') as fp:
+            fp.write('var django_template_builtins = ')
+            json.dump(templatebuiltins, fp)
+            fp.write(';\n')

docs/conf.py

@@ -11,12 +11,13 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-#import sys, os
+import sys, os
 
 # 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('.'))
+sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "_ext")))
 
 # -- General configuration -----------------------------------------------------
 
@@ -25,7 +26,7 @@
 
 # Add any Sphinx extension module names here, as strings. They can be extensions
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
-extensions = []
+extensions = ['djangodocs']
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']