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sbt, the interactive build tool
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Ethan Atkins a368bf7026 Use last modified instead of hash 
I noticed that for a simple spark project that evaluating the test task
was faster than running run when both tasks evaluated the same code
block. I tracked this down to the BackgroundJobService.copyClasspath
method. This method was hashing the jar contents of all of the files in
the build. On my computer, this took 600ms (for context, the total run
time of the `run` task was around 1.2 seconds, which included about
150ms of scala compiling and 350ms of time in the main method). If
instead we use the last modified time it drops down to 5-10ms. As
predicted, the total runtime of `run` in this project dropped down to
600ms which was on par with `test`.

I am not sure why a hash was used rather than last modified in the first place,
so I reworked things in such a way that, by default, sbt will use a hash
but if turbo mode is on, it will use the last modified instead. We can
revisit the default later.
 		2019-07-08 17:15:24 -07:00
.github/ISSUE_TEMPLATE Auto-label bug reports & delete old issue template 2019-06-04 08:01:18 +01:00
core-macros/src/main/scala/sbt/internal/util/appmacro Add support for managed task inputs 2019-05-02 14:33:29 -07:00
internal Don't append empty comp.append 2019-06-25 13:45:09 -07:00
launch Adds sbt.boot.lock sysprop to opt-out 2018-02-08 13:02:39 +00:00
licenses move remaining pieces of sbt subproject to sbt_pending and fix notices 2010-09-21 21:55:50 -04:00
main Use last modified instead of hash 2019-07-08 17:15:24 -07:00
main-actions/src fix typo 2019-06-06 08:05:16 +03:00
main-command/src Improve multi parser performance 2019-06-25 13:45:09 -07:00
main-settings/src Drop the remaining TupleSyntax usage 2019-05-29 14:43:18 +01:00
notes Implement sequential[B](tasks: Seq[Initialize[Task[B]]]) and remove useless comment outs 2018-09-19 20:54:18 -04:00
project lm-coursier-shaded 2.0.0-RC2-1 2019-07-04 23:13:46 +09:00
protocol/src/main apply formatting 2019-04-20 03:23:54 -04:00
run quote run argument if it contains a whitespace 2019-06-24 19:32:55 -04:00
sbt/src Merge pull request #4838 from eatkins/multi-cleanup 2019-07-08 07:06:31 -04:00
scripted-plugin/src/main/scala/sbt -Xfatal-warnings in most subprojects 2018-09-18 11:47:55 -04:00
scripted-sbt-old/src/main/scala/sbt/test Update header 2018-09-14 04:53:36 -04:00
scripted-sbt-redux Improve multi parser performance 2019-06-25 13:45:09 -07:00
src/main/conscript 1.2.0 2018-07-30 00:56:36 -04:00
tasks Don't automatically die on OOM: metaspace 2019-05-28 09:53:36 -07:00
tasks-standard Remove unused Task#mapTask 2019-05-29 14:43:42 +01:00
testing Catch NoClassDefFoundErrors in tests 2019-05-28 09:53:35 -07:00
vscode-sbt-scala fix typo 2019-06-06 08:05:16 +03:00
zinc-lm-integration/src Add new ClassLoaderCache implementation 2019-05-28 09:53:35 -07:00
.appveyor.yml Run more scripted tests on windows 2019-05-11 22:01:49 -07:00
.gitattributes remove gittatributes, assume core.autocrlf=false 2018-06-26 17:38:05 +03:00
.gitignore adding a fatjar release (aka sbt-big) to the build 2018-11-07 08:37:49 +00:00
.java-version Configure JVM 1.8 in .java-version 2016-10-07 08:48:23 -05:00
.mailmap Add mailmap 2019-06-11 09:30:14 +02:00
.sbtopts Use .sbtopts to increase the RAM 2018-06-25 19:40:15 -04:00
.scalafmt.conf workaround Scalafmt regex 2019-04-20 14:18:10 -04:00
.travis.yml Consolidate travis builds 2019-05-28 15:10:18 -07:00
CONTRIBUTING.md fix typo 2019-06-06 08:05:16 +03:00
LICENSE Apache License 2.0 2018-09-14 03:38:58 -04:00
NOTICE Apache License 2.0 2018-09-14 03:38:58 -04:00
PROFILING.md fix typo 2018-07-08 22:18:57 +09:00
README.md fix typo 2019-06-06 08:05:16 +03:00
SUPPORT.md Split support into SUPPORT.md 2018-04-25 14:55:09 +01:00
build.sbt Revert "revert doc" 2019-06-04 16:45:16 -07:00
reset.sh 1.0.3-SNAPSHOT 2017-09-16 15:52:58 -04:00
sbt-allsources.sh Bump underlying modules to latest 2017-03-23 12:41:24 -04:00
server.md setting query is "sbt/setting" 2017-10-03 01:45:06 -04:00

README.md

Build Status Latest version Gitter Chat

sbt

sbt is a build tool for Scala, Java, and more.

For general documentation, see http://www.scala-sbt.org/.

sbt 1.x

This is the 1.x series of sbt. The source code of sbt is split across several GitHub repositories, including this one.

  • sbt/io hosts sbt.io module.
  • sbt/util hosts a collection of internally used modules.
  • sbt/librarymanagement hosts sbt.librarymanagement module that wraps Ivy.
  • sbt/zinc hosts Zinc, an incremental compiler for Scala.
  • sbt/sbt, this repository hosts modules that implements the build tool.

Other links

  • Setup: Describes getting started with the latest binary release.
  • FAQ: Explains how to get help and more.
  • sbt/sbt-zero-seven: hosts sbt 0.7.7 and earlier versions

Issues and Pull Requests

Please read CONTRIBUTING carefully before opening a GitHub Issue.

The short version: try searching or asking on StackOverflow.

license

See LICENSE.