Master

Get upgrade notes from Sprockets 3.x to 4.x at https://github.com/rails/sprockets/blob/master/UPGRADING.md

4.2.1

• Fix for precompile issues when multiple extensions map to the same MIME type (eg. .jpeg / .jpg). #781
• Fix application/css-sourcemap+json charset #764
• Fix compatibility with Rack 2 applications. #790

4.2.0

• Rack 3 compatibility. #758
• Fix thread safety of CachedEnvironment and Cache::MemoryStore. #771
• Add support for Rack 3.0. Headers set by sprockets will now be lower case. #758
• Make Sprockets::Utils#module_include thread safe on JRuby. #759
• Fix typo in asset.rb file. #768

4.1.1

• Fix Server to return response headers to be compatible with Rack::Lint 2.0.

4.1.0

• Allow age to be altered in asset:clean rake task.
• Fix Server to return lower-cased response headers to comply with Rack::Lint 3.0. #744
• Adding new directive depend_on_directory #668
• Fix application/js-sourcemap+json charset #669
• Fix CachedEnvironment caching nil values #723
• Process *.jst.ejs.erb files with ERBProcessor #674
• Fix cache key for coffee script processor to be dependent on the filename #670

4.0.3

• Fix Sprockets::Manifest#find yielding from a Promise causing issue on Ruby 3.1.0-dev. #720
• Better detect the ERB version to avoid deprecation warnings. #719
• Allow assets already fingerprinted to be served through Server
• Do not fingerprint files that already contain a valid digest in their name
• Remove remaining support for Ruby < 2.4.#672

4.0.2

• Fix etag and digest path compilation that were generating string with invalid digest since 4.0.1.

4.0.1

• Fix for Ruby 2.7 keyword arguments warning in base.rb. #660
• Fix for when x_sprockets_linecount is missing from a source map.
• Fix subresource integrity to match the digest of the asset.

4.0.0

• Fixes for Ruby 2.7 keyword arguments warnings #625
• Manifest files are sorted alphabetically #626

4.0.0.beta10

• Fix YACB (Yet Another Caching Bug) Fix broken expansion of asset link paths

4.0.0.beta9

• Minimum Ruby version for Sprockets 4 is now 2.5+ which matches minimum ruby version of Rails [#604]
• Fix threading bug introduced in Sprockets 4 [#603]
• Warn when two potential manifest files exist. [#560]

4.0.0.beta8

• Security release for CVE-2018-3760

4.0.0.beta7

• Fix a year long bug that caused FileNotFound errors when the asset was present [#547]
• Raise an error when two assets such as foo.js and foo.js.erb would produce the same output artifact (foo.js) [#549 #530]
• Process *.jst.eco.erb files with ERBProcessor

4.0.0.beta6

• Fix source map line offsets [#515]
• Return a 400 Bad Request when the path encoding is invalid. [#514]

4.0.0.beta5

• Reduce string allocations
• Source map metadata uses compressed form specified by the source map v3 spec. [#402] [BREAKING]
• Generate index maps when decoding source maps isn't necessary. [#402]
• Remove fingerprints from source map files. [#402]

4.0.0.beta4

• Changing the version now busts the digest of all assets [#404]
• Exporter interface added [#386]
• Using ENV vars in templates will recompile templates when the env vars change. [#365]
• Source maps for imported sass files with sassc is now fixed [#391]
• Load paths now in error messages [#322]
• Cache key added to babel processor [#387]
• Sprockets::Environment#find_asset! can now be used to raise an exception when asset could not be found [#379]

4.0.0.beta3

• Source Map fixes [#255] [#367]
• Performance improvements

4.0.0.beta2

• Fix load_paths on Sass processors [#223]

4.0.0.beta1

• Initial release of Sprockets 4

Please upgrade to the latest Sprockets 3 version before upgrading to Sprockets 4. Check the 3.x branch for previous changes https://github.com/rails/sprockets/blob/3.x/CHANGELOG.md.