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Replace sprockets-sass with dartsass-sprockets #2649

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Replace sprockets-sass with dartsass-sprockets #2649

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@spamguy spamguy commented Feb 11, 2026 •
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This PR modernizes the Sass compilation pipeline by migrating from the deprecated sprockets-sass gem to dartsass-sprockets. Closes #2214 and #2450.

After merging, the way should be clear to upgrade various other gems previously blocked by Sass.

Highlights

  • Updated sprockets to v4
  • Replaced sprockets-sass with dartsass-sprockets in the build pipeline
  • Added manual precompilation of .scss.erb files to the Thor task. dart-sass doesn't handle ERB preprocessing automatically, so this step is now explicit in the build process
  • Removed deprecated @import statements in favor of @use

Testing Notes

There should be no user-facing impact. I did my utmost to confirm this through smoke tests, env comparisons, unit tests, etc. Verifying the quality of a production build on my li'l dev machine is possibly beyond my understanding, but will gladly take any advice.

@spamguy
Replace sprockets-sass with dartsass-sprockets.
ebd756d 
Add manual precompile of .scss.erb files to thor task, since dart-sass is no longer responsible for it.

Remove @import statements deprecated by dart-sass, and add them as @use clauses in individual modules.

Replace deprecated darken() functions with color.adjust(). Update copyright year in README.
@spamguy spamguy requested a review from a team as a code owner February 11, 2026 04:36
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socket-security bot commented Feb 11, 2026

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff Package Supply Chain
Security		 Vulnerability Quality Maintenance License
Updatedsprockets@​3.7.5 ⏵ 4.2.289100100100100
Addeddartsass-sprockets@​3.2.197100100100100

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