apidoc takes extension options

sphinx/apidoc.py

@@ -346,6 +346,12 @@ Note: By default this script will not overwrite already created files.""")
                       'defaults to --doc-version')
     parser.add_option('--version', action='store_true', dest='show_version',
                       help='Show version information and exit')
+    from sphinx.quickstart import EXTENSIONS
+    group = parser.add_option_group('Extension options')
+    for ext in EXTENSIONS:
+        group.add_option('--ext-' + ext, action='store_true',
+                         dest='ext_' + ext, default=False,
+                         help='enable %s extension' % ext)
 
     (opts, args) = parser.parse_args(argv[1:])
 
@@ -404,6 +410,10 @@ Note: By default this script will not overwrite already created files.""")
             module_path = rootpath,
             append_syspath = opts.append_syspath,
         )
+        enabled_exts = {'ext_'+ext: getattr(opts, 'ext_'+ext)
+                        for ext in EXTENSIONS if getattr(opts, 'ext_'+ext)}
+        d.update(enabled_exts)
+
         if isinstance(opts.header, binary_type):
             d['project'] = d['project'].decode('utf-8')
         if isinstance(opts.author, binary_type):

tests/test_apidoc.py

@@ -145,3 +145,21 @@ def test_multibyte_parameters(make_app, apidoc):
     app.build()
     print(app._status.getvalue())
     print(app._warning.getvalue())
+
+
+@pytest.mark.apidoc(
+    coderoot=(rootdir / 'root'),
+    options=['--ext-mathjax'],
+)
+def test_extension_parsed(make_app, apidoc):
+    outdir = apidoc.outdir
+    assert (outdir / 'conf.py').isfile()
+
+    with open(outdir / 'conf.py') as f:
+        rst = f.read()
+        assert "sphinx.ext.mathjax" in rst
+
+    app = make_app('text', srcdir=outdir)
+    app.build()
+    print(app._status.getvalue())
+    print(app._warning.getvalue())