Merge pull request #3674 from tartley/inject-webp-mimetype

Fix exception from gallery RSS with WebP images

AUTHORS.txt

@@ -58,6 +58,7 @@
 * `Jesper Dramsch <https://github.com/jesperdramsch>`_
 * `John Kristensen <https://github.com/jerrykan>`_
 * `Jonathon Anderson <https://github.com/anderbubble>`_
+  `Jonathan Hartley <https://github.com/tartley>`_
 * `Joshua Barratt <https://github.com/jbarratt>`_
 * `Juan Pedro Fisanotti <https://github.com/fisadev>`_
 * `Juanjo Conti <https://github.com/jjconti>`_

CHANGES.txt

@@ -14,6 +14,8 @@ Features
 Bug Fixes
 ---------
 
+* Fix RSS generation of galleries containing WebP images, which caused
+  an unhandled exception due to not having a known MIME type (Issue #3671)
 * Fix ``auto`` command infinite loop (Issue #3677)
 * Fix API URL in CSS and JS minifiers (Issue #3658)
 * Fix ``:align: center`` for images in reST (Issue #3657)

nikola/data/samplesite/galleries/demo/metadata.sample.yml

@@ -7,7 +7,7 @@ order: 2
 name: tesla4_lg.jpg
 order: 0
 ---
-name: tesla_conducts_lg.jpg
+name: tesla_conducts_lg.webp
 caption: Nikola Tesla conducts electricity
 order: 1
 ---

nikola/nikola.py

@@ -891,6 +891,7 @@ def __init__(self, **config):
                     utils.LOGGER.warning('You are currently disabling "{}", but not the following new taxonomy plugins: {}'.format(old_plugin_name, ', '.join(missing_plugins)))
                     utils.LOGGER.warning('Please also disable these new plugins or remove "{}" from the DISABLED_PLUGINS list.'.format(old_plugin_name))
                     self.config['DISABLED_PLUGINS'].extend(missing_plugins)
+
         # Special-case logic for "render_indexes" to fix #2591
         if 'render_indexes' in self.config['DISABLED_PLUGINS']:
             if 'generate_rss' in self.config['DISABLED_PLUGINS'] or self.config['GENERATE_RSS'] is False:
@@ -1000,6 +1001,9 @@ def __init__(self, **config):
             self.state._set_site(self)
             self.cache._set_site(self)
 
+        # WebP files have no official MIME type yet, but we need to recognize them (Issue #3671)
+        mimetypes.add_type('image/webp', '.webp')
+
     def _filter_duplicate_plugins(self, plugin_list):
         """Find repeated plugins and discard the less local copy."""
         def plugin_position_in_places(plugin):