scalafmt

User documentation

Head over to the user docs for instructions on how to install scalafmt.

Quick help

• On Windows add -Dfile.encoding=UTF8 to SBT_OPTS.
• Run formatting tests: core/testOnly org.scalafmt.FormatTests.
• Write new formatting test: read this doc.
• Build docs: sbt readme/run will create the docs, which you can open with open readme/target/scalatex/index.html. Docs are built with Scalatex.
• Hack on IntelliJ plugin: see this doc.
• Hack on scalafmt: see tutorial.
• Hack on SBT plugin: run sbt scripted.
• Run jmh benchmarks: run-benchmarks.sh.
• Run formatter on millions of lines of code: core/test:runMain org.scalafmt.FormatExperimentApp:
• Debug performance: after each test run in FormatTests, a flamegraph report like this one is generated in target/index.html. I usually keep a browser tab open at localhost:3000/target/index.html along with this background process: browser-sync start --server --files "target/*.html". See Browsersync.

Tutorial

If you'd like to find out how to work on scalafmt, see this tutorial.

Team

The current maintainers (people who can merge pull requests) are:

• Ólafur Páll Geirsson - @olafurpg
• Pedro J Rodriguez Tavarez - @pjrt
• Iurii Susuk - @ysusuk

An up-to-date list of contributors is available here: https://github.com/olafurpg/scalafmt/graphs/contributors

We strive to offer a welcoming environment to learn, teach and contribute.

Acknowledgements

[JProfiler](http://www.ej-technologies.com/products/jprofiler/overview.html) generously supports scalafmt with its full-featured Java Profiler.