luke
/
sbt
mirror of https://github.com/sbt/sbt.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
sbt, the interactive build tool
7,252 Commits 23 Branches 329 Tags 92 MiB
Scala 94.5%
Java 3.1%
Shell 1.1%
Batchfile 0.9%
Roff 0.2%
Other 0.1%
Go to file
Ethan Atkins 286e52793c Overhaul dependency layer for java reflection 
My first attempt, cc8c66c66d, at making
java reflection work with a layered classloader with a dependency jar
layer was a failure. It would generally work ok the first time the user
ran test, but was likely to fail on a second run.

There were a number of problems with the strategy:
1) It relied on the thread's context class loader to determine where to
   attempt the reverse lookup.
2) It is not possible to ever reload classes loaded by a classloader.
   Consider the classloading hierarchy a <- b, where
   the arrow implies that a is the parent of b. I incorrectly thought
   that a's loadClass method would be called every time a class loaded
   by a made a call to Class.forName(name: String). This turns out to
   not be the case. As a result, the second time the dependency layer
   was used, where now the hierarchy is a <- c, that same Class.forName
   call could return a Class from b which causes a nasty crash.

It isn't possible to work around the limitation in 2 so the only option
that allows both caching and java reflection across layers to work is to
cache the dependency layer, but invalidate when cross layer reflection
occurs. This turns out to be straightforward to implement. The
performance looks very similar to the ScalaLibrary strategy when java
reflection is used, which makes sense because the scala library and
scala reflect layers are still reused when the dependency layer is
invalidated.

I also stopped passing around the resource map to all of the layers.
Resource loading is hierarchical and the resource layer comes above the
dependency layer in the stack so there was no need for the bottom layers
to also be RawResource loaders.
 		2019-06-06 19:17:59 -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 Document helper functions in BuildStructure 2019-06-02 23:28:53 +01:00
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 Overhaul dependency layer for java reflection 2019-06-06 19:17:59 -07:00
main-actions/src fix typo 2019-06-06 08:05:16 +03:00
main-command/src Merge pull request #4765 from eatkins/watch-docs 2019-06-03 22:36:46 -04:00
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 IO 1.3.0-M11 2019-06-04 00:14:42 -04:00
protocol/src/main apply formatting 2019-04-20 03:23:54 -04:00
run Properly close a number of classloaders 2019-05-02 14:38:33 -07:00
sbt/src fix typo 2019-06-06 08:05:16 +03:00
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 Support commands in continuous 2019-06-01 20:10:26 -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
.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.