Clojure 1.9 is now available

Clojure 1.9 is now available

08 December 2017
Alex Miller

Clojure 1.9 is now available!

Clojure 1.9 introduces two major new features: integration with spec and command line tools.

spec (rationale, guide) is a library for describing the structure of data and functions with support for:

  • Validation

  • Error reporting

  • Destructuring

  • Instrumentation

  • Test-data generation

  • Generative test generation

  • Documentation

Clojure integrates spec via two new libraries (still in alpha):

This modularization facilitates refinement of spec separate from the Clojure release cycle.

The command line tools (getting started, guide, reference) provide:

  • Quick and easy install

  • Clojure REPL and runner

  • Use of Maven and local dependencies

  • A functional API for classpath management (tools.deps.alpha)

The installer is available for Mac developers in brew, for Linux users in a script, and for more platforms in the future.

For more information, see the complete list of all changes in Clojure 1.9 for more details.


Thanks to all of the community members who contributed to Clojure 1.9 (first time contributors in bold):

  • Adam Clements

  • Andy Fingerhut

  • Brandon Bloom

  • Cameron Desautels

  • Chad Taylor

  • Chris Houser

  • David Bürgin

  • Eli Lindsey

  • Gerrit Jansen Van Vuuren

  • Ghadi Shayban

  • Greg Leppert

  • Jason Whitlark

  • Johan Mena

  • Jozef Wagner

  • Lee Yen-Chin

  • Matthew Boston

  • Michael Blume

  • Michał Marczyk

  • Nicola Mometto

  • Ruslan Al-Fakikh

  • Steffen Dienst

  • Steve Miner

  • Yegor Timoshenko

  • Zhuang XiaoDan