| Commit message (Collapse) | Author | Age | Files | Lines |
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A SecurityManager is once installed globally and stays the same across
all classloaders. TrapSecurityManager was installed this way, but it
looked up the `trapExitCode` in it's own classloader, while
classes in other classloaders (when cbt was using another version of
cbt) were writing it to their own classloader. This flag needs to be in
a global place instead to fix this, so we'll put it straight into the
TrapSecurityManager itself.
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Installing one globally for the JVM live-time and make behavior dependent
on a thread local variable seems safer than globally switching it out
and having race conditions.
Also now all other calls are forwarded to a potential Nailgun
SecurityManager, which should fix some bugs.
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when CBT crashes
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Proxy settings can be supplied either via Java system-properties or via
environment variables (http_proxy/https_proxy/no_proxy).
Java system-properties take precedence over env vars. Evaluation of
proxy settings happens only during nailgun startup for now.
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easier to read without.
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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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loader into it to not produce multiple exceptions in a classloader tree, where a class is not in the systemclassloader)
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control flow, but use null instead
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this showed exception when compile errors happened during Stage1.
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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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a library.
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(thing can still be cleaned up)
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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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fix a few warnings.
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replace two level classloader (one for non-cachable dependencies with a cached parent one for cachable ones) with a hierachy of classloaders corresponding
this should eventually allow re-using CBT's classloader between stage1 and stage2
this change breaks the ScalaTest support for now
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caching classloaders hierarchically without deadlocks
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fragile with regards to concurrency and user code setting security managers.
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++ for strings everywhere. Added ++ method to File and URL and use it in many places
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speed and easier transfer of part of it into java. Also enable looping to recompile NailgunLauncher and stage1
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