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In #1485 it was requested to extract URLs from CSS files and inline styles. While lychee proper is generally becoming more conservative about the file types we support, the places where links can occur in CSS are pleasantly limited to `url()` directives (with the exception of inline URLs in `font-face` and `@import` rules, which we conveniently ignore for now). As such, integrating CSS support into lychee can be done by means of a simple extractor utilizing a bunch of regular expressions. It's not quite as exhaustive as a proper CSS parser (such as Servo's rust-cssparser crate), but on the plus side, we don't need to add additional dependencies. Fixes #1485
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I briefly considered adding SCSS/SASS file support as well, but decided against it. Mainly for the following reasons:
Besides, users can opt-in with |
Use top-level assert_eq for less code and better coverage
thomas-zahner
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Dec 16, 2025
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I've added 5409ff9. Do you agree with that? It's less code and yields better coverage
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Absolutely! I forgot we had that. Much better, thanks. |
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AFAICT, the only open question is what we do with #1956 (comment). |
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I see no problems, so we're good to merge |
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Thanks for the swift review. |
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In #1485 it was requested to extract URLs from CSS files and inline styles.
While lychee proper is generally becoming more conservative about the file types we support, the places where links can occur in CSS are pleasantly limited to
url()directives (with the exception of inline URLs infont-faceand@importrules, which we conveniently ignore for now).As such, integrating CSS support into lychee can be done by means of a simple extractor utilizing a bunch of regular expressions. It's not quite as exhaustive as a proper CSS parser (such as Servo's rust-cssparser crate), but on the plus side, we don't need to add additional dependencies.
Fixes #1485