Previously, packages `java.lang` and `kotlin.jvm` were imported on JVM
by default on the same rights, causing problems when the same classifier
existed both in `java.lang` and `kotlin.jvm`. Since the only known case
of such conflict were type aliases to JVM classes, the corresponding
classes (expansions of those type aliases) were manually excluded from
default imports. This made the code in DefaultImportProvider complicated
and resulted in multiple problems, regarding both correctness and
performance (see 82364ad3e5, a9f2f5c7d0, dd3dbda719).
This change adds a new concept, a "low priority import", and treats
`java.lang` as such. Since these imports are now separated from the rest
of default imports in LazyImportScope via secondaryClassImportResolver,
conflicts between classifiers are handled naturally: the one from
`kotlin.jvm` always wins (unless the one from `java.lang` is imported
explicitly, of course). This approach is simpler, safer and does not
require any memory to cache anything.
Skip ResolveToJava.kt test for javac-based resolve; it now fails because
of a weird issue which I didn't have time to investigate (this is OK
because it's a corner case of an experimental functionality)
- support common modules metadata compilation under flag (it is not required since all common source roots are included transitively for now)
- introduce expect actual tracker in jps: move implementation from gradle to build-common
- support js incremental compilation: move implementation from gradle to build-common
Otherwise IC fails when a project declares a class with the same name
as in one of its dependencies.
The issue is relevant only for non-JPS IC (Gradle, Maven, etc.),
but I added the test for JPS too.
#KT-20516 fixed
JS IC compares proto using a source file path as a key,
so moving file causes recompilation of its usages
unlike JVM IC that uses a class file path as a key.
JPS marks dirty direct usages of removed classes since 172.* before a build.
Generic IC also marks dirty all subclasses and their usages.
That is necessary because a method from a removed class could be used
through a subclass.
JPS and generic IC logs diverged in 172 branch, but non-JPS tests
were not run on CI.
It was already working in JPS, because it see our synthetic classes
as subclasses for SAM's, but with non-JPS build we have to manually
tracking places that should be recompiled after SAM members are changed
Otherwise unexpected compile error might happen,
when there are Groovy files, but they are not dirty,
so Groovy builder does not generate source stubs,
and Kotlin builder is filtering out output directory
from classpath (because it may contain outdated Java classes).
Previously the issue was not detected,
because it was not possible to turn off the IC completely (in JPS),
only switch to the legacy IC.
#KT-20138
Unlike the JVM target platform, the JS back-end does
not track getters' and setters' usages separately,
so when either accessor of some property is changed,
all usages of that property will be rebuilt.
Alexey Tsvetkov