FS2 Files

This release introduces a new networking stack for the JVM and Native (https://github.com/typelevel/fs2/pull/3240) platforms that uses the new I/O-integrated runtime released in Cats Effect v3.6.0.

Enhancements

• Optimise text.lines for longer lines, larger chunks use-cases by @svalaskevicius in https://github.com/typelevel/fs2/pull/3481
• Optmize interop.flow.StreamSubscriber.onNext by @BalmungSan in https://github.com/typelevel/fs2/pull/3387
• Add evalFold combinator to Stream by @Ivan091 in https://github.com/typelevel/fs2/pull/3500
• Add message to requirements by @Jasper-M in https://github.com/typelevel/fs2/pull/3525
• run Process#waitFor on virtual thread if available by @onsah in https://github.com/typelevel/fs2/pull/3539
• Implement {Signal,SignallingRef}#mapK by @rahulrangers in https://github.com/typelevel/fs2/pull/3546
• I/O polling by @armanbilge in https://github.com/typelevel/fs2/pull/3240
• Add interop.flow.pipeToProcessor & interop.flow.processorToPipe by @BalmungSan in https://github.com/typelevel/fs2/pull/3449

Fixes

• Fix resource leak in Scope. by @ValdemarGr in https://github.com/typelevel/fs2/pull/3473
• Change repeatN to support n=0 by @L7R7 in https://github.com/typelevel/fs2/pull/3492
• Fix writeUtf8Lines evaluates leading effects in the input stream twice by @ChenCMD in https://github.com/typelevel/fs2/pull/3489
• Be more deffensive with the StreamSubscriber internal state by @BalmungSan in https://github.com/typelevel/fs2/pull/3545

Documentation

• Fix typo in exists scaladoc by @vladislavsheludchenkov in https://github.com/typelevel/fs2/pull/3480
• Fix docs for Stream.exec function by @jakobmerrild in https://github.com/typelevel/fs2/pull/3491
• Adding Channel to documentation by @hkateu in https://github.com/typelevel/fs2/pull/3475
• Improve documentation by @arturaz in https://github.com/typelevel/fs2/pull/3527

Updates

• Update scala-library to 2.12.20 by @typelevel-steward in https://github.com/typelevel/fs2/pull/3470
• Update jnr-unixsocket to 0.38.23 by @typelevel-steward in https://github.com/typelevel/fs2/pull/3493
• Update scala3-library, ... to 3.3.5 by @typelevel-steward in https://github.com/typelevel/fs2/pull/3526
• Update scala-library to 2.13.16 by @typelevel-steward in https://github.com/typelevel/fs2/pull/3517
• Update sbt-scalajs, scalajs-compiler, ... to 1.18.2 by @typelevel-steward in https://github.com/typelevel/fs2/pull/3521
• Scalafix updates by @armanbilge in https://github.com/typelevel/fs2/pull/3544
• Update cats-effect, cats-effect-laws, ... to 3.6.0 by @typelevel-steward in https://github.com/typelevel/fs2/pull/3554

New Contributors

• @ValdemarGr made their first contribution in https://github.com/typelevel/fs2/pull/3473
• @vladislavsheludchenkov made their first contribution in https://github.com/typelevel/fs2/pull/3480
• @jakobmerrild made their first contribution in https://github.com/typelevel/fs2/pull/3491
• @ChenCMD made their first contribution in https://github.com/typelevel/fs2/pull/3489
• @hkateu made their first contribution in https://github.com/typelevel/fs2/pull/3475
• @Ivan091 made their first contribution in https://github.com/typelevel/fs2/pull/3500
• @onsah made their first contribution in https://github.com/typelevel/fs2/pull/3539
• @rahulrangers made their first contribution in https://github.com/typelevel/fs2/pull/3546

Full Changelog: https://github.com/typelevel/fs2/compare/v3.11.0...v3.12.0