FS2 3.2.0 supports Scala 2.12, 2.13, and 3.1 and Cats Effect 3.

This release features the incorporation of scodec-stream and codec-protocols in to fs2 proper.

• The fs2-core module has a new fs2.Scan type for building compositional, pure, stateful transformations.
• The fs2-core module also has a new fs2.timeseries package for working with time stamped streams.
• The new fs2-scodec module defines the fs2.interop.scodec package, defining StreamDecoder and StreamEncoder
• The new fs2-protocols module provides various examples of using these types.

Checkout the time series and scodec sections of the guide for more information.

What's Changed

• Update scala3-library, ... to 3.1.0 by @scala-steward in #2682
• Bump ip4s and deprecate fs2.io.net.UnknownHostException by @armanbilge in #2687
• Remove unused dependency to scalajs-dom by @armanbilge in #2681
• Import scodec-stream and scodec-protocols in to fs2 by @mpilquist in #2588
• Improve Node.js server shutdown and error handling by @armanbilge in #2554

Full Changelog: v3.1.6...v3.2.0

What's Changed

• Make Pull#output and Pull#outputOption1 effect polymorphic by @TimWSpence in #2670
• Publisher.toStream can demand for more than one element by @yanns in #2666
• site/ecosystem.md add cabbit, fix links to edit the list by @nikiforo in #2675
• Fix #2679 - bug in Chunk.compactUntagged when used with empty or singleton chunks by @mpilquist in #2680

New Contributors

• @yanns made their first contribution in #2666

Full Changelog: v3.1.5...v3.1.6

What's Changed

• Update sbt-scalajs, scalajs-compiler, ... to 1.7.1 by @scala-steward in #2669
• Update Scope docs by @TimWSpence in #2668
• Fix decodeCWithCharset with JDK8 by @rossabaker in #2671

Full Changelog: v3.1.4...v3.1.5

Supports Cats Effect 3 and built for Scala 2.12, 2.13, and 3 final.

FS2 3.1.4 is a bug fix release focused on performance.

What's Changed

• Make indexed traversal of Chunk.Queue amortized logarithmic time by @mpilquist in #2631
• parEvalMapUnordered performance by @nikiforo in #2626
• Pull - Remove nested matches. by @diesalbla in #2625
• Use AtomicReference instead of Ref by @notxcain in #2632
• Make Compiler.Target extend MonadCancelThrow by @bplommer in #2612
• PipedStreamBuffer circular copying overflow fix by @vasilmkd in #2638
• Update ip4s-core to 3.0.4 by @scala-steward in #2639
• Amended a couple of things on the site by @domaspoliakas in #2636
• Use JDK 17 in the CI by @vasilmkd in #2645
• fix socket leak for unresolvable domains by @stephennancekivell in #2644
• Improve Scope#interruptWhen error by @rossabaker in #2634
• Create fs2.compression.checksum by @armanbilge in #2606
• Update scodec-bits to 1.1.29 by @scala-steward in #2648
• Fix simple warnings in the build and tests by @vasilmkd in #2649
• Fix Stream#concurrently for short-circuiting monad transformers by @vasilmkd in #2652
• Update munit-cats-effect-3 to 1.0.6 by @scala-steward in #2656
• Revert "Remove unnecessary delegate" for fs2.io.compression by @armanbilge in #2658
• Make interruptWhen a no-op with the Sync compiler by @rossabaker in #2657
• Improve IO exceptions on Node.js by @armanbilge in #2655
• Flush CharsetDecoder to produce final chunk by @rossabaker in #2667
• Fix socket close regression by @armanbilge in #2665
• Re-worked Node.js readReadable API by @armanbilge in #2663
• Upgrade scalacheck-effect to 1.0.3 by @mpilquist in #2661

New Contributors

• @stephennancekivell made their first contribution in #2644

Full Changelog: v3.1.3...v3.1.4

Supports Cats Effect 2 and built for Scala 2.12, 2.13, and 3 final.

What's Changed

• Update sbt-scalafmt to version 2.4.3 by @vasilmkd in #2474
• Update Scala to version 3.0.1 by @vasilmkd in #2475
• Update sbt to version 1.5.5 by @vasilmkd in #2486
• Update sbt-mdoc to 2.2.22 by @vasilmkd in #2499
• Update cats-effect to version 2.5.2 by @vasilmkd in #2516
• Upgrade Scala.js to version 1.7.0 by @vasilmkd in #2560
• Scala, plugin and library updates by @vasilmkd in #2620
• Use AtomicReference instead of Ref by @notxcain in #2615
• Fix build warnings after upgrading Cats Effect by @vasilmkd in #2641
• PipedStreamBuffer circular copying overflow fix backport by @vasilmkd in #2640
• Use the latest build of JDK 11 by @vasilmkd in #2646
• Rework parJoin to work with transformers by @vasilmkd in #2552
• Fix Stream#concurrently for short-circuiting monad transformers - 2.5.x by @vasilmkd in #2653

Full Changelog: v2.5.9...v2.5.10

Supports Cats Effect 3 and built for Scala 2.12, 2.13, and 3 final.

FS2 3.1.3 is a bug fix release focused on performance.

Bugfixes:

• Fix bug in translate (#2614)
• Fix UnixSockets class path detection logic (#2624)

Improvements:

• Remove unnecessary indexing in Chunk combinators (#2630)
• Make indexed traversal of Chunk.Queue amortized logarithmic time (#2631)
• Improve performance of parEvalMapUnordered (#2626)
• Implement Files#realPath (#2622)
• Simplify internals (#2625)
• Refactor implementation of groupWithin (#2619)
• Reworked parJoin to work with transformers (#2563)

Acknowledgments

➜  git shortlog -sn --no-merges "v3.1.2".."v3.1.3"
     8  mpilquist
     7  Michael Pilquist
     6  Scala Steward
     5  Vasil Vasilev
     2  Arman Bilge
     2  Diego E. Alonso Blas
     1  Tim Spence

Supports Cats Effect 3 and built for Scala 2.12, 2.13, and 3 final.

FS2 3.1.2 is a bug fix release which addresses a couple of memory leaks in certain types of streams.

Improvements:

• Fixed memory leak when parJoin is used with merge (#2602)
• Add a convenient shorthand for predicating effects on a boolean signal (#2596)
• Make Compression[F] cross-platform and implement on Node.js (#2587)
• Introduce fs2.io.ClosedChannelException (#2582)
• Special case for parEvalMap with max concurrency of 1 (#2577)

Acknowledgments

➜  git shortlog -sn --no-merges "v3.1.1".."v3.1.2"
    12  Scala Steward
    11  Arman Bilge
     3  Stephen Judkins
     3  Diego E. Alonso Blas
     2  slice
     2  Michael Nikolich
     1  Ben Stewart
     1  mpilquist
     1  Adam Rosien

Supports Cats Effect 3 and built for Scala 2.12, 2.13, and 3 final.

FS2 3.1.1 is a bug fix release which addresses a memory leak in map on certain types of streams.

Improvements:

• Fixed memory leak in map (#2568 #2572)
• Added special case optimization to parJoin (#2557)

Acknowledgments

➜  git shortlog -sn --no-merges "v3.1.0".."v3.1.1"
     6  Michael Pilquist
     3  Arman Bilge
     2  Diego E. Alonso Blas
     2  Scala Steward
     1  Ross A. Baker
     1  Vasil Vasilev
     1  Christopher Davenport
     1  Philipp Hoffmann
     1  Rehan Mahmood

Supports Cats Effect 3 and built for Scala 2.12, 2.13, and 3 final.

FS2 3.1.0 features new support for Node.js in the fs2-io module, including cross platform APIs for TCP, UDP, TLS, and file management. The fs2.io.file package has been substantially revamped, removing all dependencies on Java APIs, providing a much nicer experience (though binary compatibility with 3.0.x is provided). The biggest change is the introduction of fs2.io.file.Path as an alternative for java.nio.file.Path -- the former has an idiomatic Scala API and works on both the JVM and Node.js. See the Files section of the microsite for some examples.

Features:

• Update fs2.io.net to build for Node.js and JVM (#2453)
• Update fs2.io.file package to build for Node.js and JVM and remove dependencies on Java APIs (#2519)
• Implement unchunks as the inverse of chunks (#2506)

Improvements:

• Improve performance from Stream.fromQueueUnterminated and Stream.fromQueueNoneTerminated by @jordiolivares (#2521)
• Miscellaneous simplifications & optimizations to main stream interpreter (#2480 #2493 #2501 #2507 #2508 #2524)
• Add a Monoid[Chunk] instance (#2470)
• Add text.hex.{encode, decode} (#2477)

Acknowledgments

Special thanks to @armanbilge who implemented all of the Node.js support in fs2-io as well as in a number of downstream libraries!

➜  git shortlog -sn --no-merges "v3.0.6".."v3.1.0"
   121  Arman Bilge
    89  Michael Pilquist
     9  Scala Steward
     6  Andrew Valencik
     6  Diego E. Alonso Blas
     3  Jordi Olivares Provencio
     2  Stanislav Kovalenko
     2  nikiforo
     1  Jordi Olivares
     1  Giovanni Ruggiero

Supports Cats Effect 2 and built for Scala 2.12, 2.13, and 3 final.

Fixes:

• Backport: Fix TLS socket read stall immediately after handshake (#2469)

Acknowledgments

➜  git shortlog -sn --no-merges "v2.5.8".."v2.5.9"
     2  Vasil Vasilev
     1  Eric Meisel