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Fix #8885: html: AttributeError for CSS/JS files on html_context #8893

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Feb 16, 2021
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Fix #8885: html: AttributeError for CSS/JS files on html_context #8893

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8205283
refactor: html: Fix typo
tk0miya Feb 15, 2021
82501a6
Fix #8885: html: AttributeError for CSS/JS files on html_context
tk0miya Feb 15, 2021
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2 changes: 2 additions & 0 deletions CHANGES
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Expand Up @@ -17,6 +17,8 @@ Bugs fixed
----------

* #8884: html: minified js stemmers not included in the distributed package
* #8885: html: AttributeError is raised if CSS/JS files are installed via
:confval:`html_context`
* #8880: viewcode: ExtensionError is raised on incremental build after
unparsable python module found

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16 changes: 14 additions & 2 deletions sphinx/builders/html/__init__.py
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Expand Up @@ -1035,8 +1035,20 @@ def hasdoc(name: str) -> bool:
templatename = newtmpl

# sort JS/CSS before rendering HTML
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ctx['script_files'].sort(key=lambda js: js.priority)
ctx['css_files'].sort(key=lambda js: js.priority)
try:
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FYI Python 3 has this nice pattern for such cases:

Suggested change
try:
with contextlib.suppress(AttributeError):

# Convert script_files to list to support non-list script_files (refs: #8889)
ctx['script_files'] = sorted(list(ctx['script_files']), key=lambda js: js.priority)
except AttributeError:
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# Skip sorting if users modifies script_files directly (maybe via `html_context`).
# refs: #8885
#
# Note: priority sorting feature will not work in this case.
pass
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Finally, I determined to keep the list as is and not emitting a warning. It means priority sort will not work. But no extensions do not use it yet.
And I'll deprecate html_context['*_files]' in another step to migrate to html_*_files.


try:
ctx['css_files'] = sorted(list(ctx['css_files']), key=lambda css: css.priority)
except AttributeError:
pass

try:
output = self.templates.render(templatename, ctx)
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