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- move plugins into cbt namespace
- enable scalac warnings in builds by default
- merged language flags into AdvancedScala trait
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changes builds from using immutable.Seq to using Predef.Seq in favor of simplicity over purity. This has been discussed on gitter.
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One large commit, because it is was hard to do these things in isolation or to separate them now.
CBT now knows how to load other versions of itself
- Support for reproducible builds (!), by providing a CBT git URL and hash to tie build to
- Support for composing builds using different CBT versions (!)
- introduce (in compatibility/) Java interfaces all CBT versions need to stay compatible with, so they can talk to each other. And put extension methods to these interfaces in cbt package object
Class loading
- add some sanity checks for class loading
- improve class loader invalidation to fix bugs
- implement caching in Java land class loaders. In particular to prevent the system class loader to repeatedly generate ClassNotFound exceptions in each sink of the class loader DAG for non JDK classes (meaning major speed up for projects with many classes).
- getting rid of transient class loader cache unifying into "persistent" one instead (which is still wrong as invalidation eventually needs to invalidate entire sub graphs of the class loading DAG, not single class loaders. Seems like we'll have to abandon the hashmap based approach and tie caching to dependency objects)
Other Caching
- cache dependencies extracted from xml files, which was one major time killer, but invalidate cache when cbt changed (maven dependency user facing api needs simplification now!)
- memorize last successful compile time in the file system rather than memory, to guard against unnecessary recompiling even across launches (or when using cbt direct)
Structural improvements
- Factor out ClassLoaderCache on Java land into its own class.
- Port MultiClassLoader to Java land, to better compose classloaders in NailgunLauncher.
- Remove many global constants and variables (in object paths and in NailgunLauncher) and pass them through instead. Needed for composing of builds.
- move more code from resolver into Lib for less entanglement with classes (needed to compatibility interfaces) and better re-usability
- remove canBeCached. Everything can be cached now, but we need to be careful about correct invalidation.
- remove build announcing produced jars. We can add if ever needed.
- change callNullary to return exit code instead of Unit as preparation for next commit introducing "recursive"
ScalaTest
- Makes ScalaTest support work (still a bit too inflexible, but mostly works well)
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and thus being re-created on second and subsequent runs.
Also use classloader from cache for Builds rather than new one, which should properly make Build dependencies work.
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to avoid creating classloaders for the same files more than once, which leads to conflicts.
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another one. This should improve behavior of transient cache.
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This commit also
- requires Dependencies to explicitly implement canBeCached
- unifies some logic for dependency downloading
- moves SBT-like dependency DSL into its own trait
- error message showing build directory for exceptions in builds
Not splitting this up in favor of faster progress to 1.0.
The user facing API can probably be slightly improved using implicits
inside of BasicBuild, but we can do that later.
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This fixes the issues with crashes loading stage2 introduces in 57de43907e05d4cd3986e2994e0e3bff93e09b4e. Also should be faster when using nailgun.
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structurally. (didn't cause any problem right now, but could some day)
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(and safe up to 0.1s for each call)
There still seem to be 2 bugs related to CBT development in the code. One if you simpy save a stage1 file unchanged and re-run cbt, it fails to call Stage2.run reflectively. Also in case of compile errors in stage1, a TrappedExitCode exception is thrown and not caught.
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(thing can still be cleaned up)
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exceptions that happened in the previous commit. Also gets rid of scala.reflect dependency in stage2.
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- Changed launcher to already load zinc
- use code generation to generate necessary dependencies
- changed resolver to linearize dependency DAG in a way that guarantees that every transitive dependee of a node in the DAG is a transitive dependee of that node in the linear sequence
- move exit code trapping code into java so it can be used for zinc early
There seems to be a bug in this version, where CBT crashes about half of the time with a "object is not an instance of declaring class" Exception during running the task from the build object via reflection.
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caching classloaders hierarchically without deadlocks
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pair coded with @chavxo
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logger as implicits
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++ for strings everywhere. Added ++ method to File and URL and use it in many places
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lib. qualification from Stage1 for better readability
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