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Use kapt stubs for kotlin header jar for javac

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When compling kotlin code with annotation processors we are generating
java stubs for the kotlin sources using kapt, and parsing them in
turbine when running the annotation processors.  Passing --output
to turbine will also compile the stubs into a header jar that can
be used as a dependency to javac, allowing the javac and kotlinc
rules to run in parallel.  The turbine-apt header jar can't be used
as the header jar for downstream modules as it doesn't contain the
kotlin metadata needed by kotlinc rules, so the kotlinc gen-jvm-abi
plugin output is still used for the module's final header jar.

Test: TestKapt
Bug: 222095735
Change-Id: I82d0900f3dc30f3e3ebd7cab0693dfe741d9b955
This commit is contained in:
Colin Cross
2022-03-28 18:27:17 -07:00
parent b5db401599
commit c6ef485370
4 changed files with 51 additions and 24 deletions
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6
java/kotlin.go
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@@ -163,11 +163,11 @@ var kaptStubs = pctx.AndroidRemoteStaticRule("kaptStubs", android.RemoteRuleSupp
"classpath", "srcJars", "commonSrcFilesArg", "srcJarDir", "kaptDir", "kotlinJvmTarget",
"kotlinBuildFile", "name", "classesJarOut")
// kotlinKapt performs Kotlin-compatible annotation processing. It takes .kt and .java sources and srcjars, and runs
// kotlinTurbineApt performs Kotlin-compatible annotation processing. It takes .kt and .java sources and srcjars, and runs
// annotation processors over all of them, producing a srcjar of generated code in outputFile. The srcjar should be
// added as an additional input to kotlinc and javac rules, and the javac rule should have annotation processing
// disabled.
func kotlinKapt(ctx android.ModuleContext, srcJarOutputFile, resJarOutputFile android.WritablePath,
func kotlinTurbineApt(ctx android.ModuleContext, headerJarOutputFile, srcJarOutputFile, resJarOutputFile android.WritablePath,
srcFiles, commonSrcFiles, srcJars android.Paths,
flags javaBuilderFlags) {
@@ -231,7 +231,7 @@ func kotlinKapt(ctx android.ModuleContext, srcJarOutputFile, resJarOutputFile an
// Then run turbine to perform annotation processing on the stubs and any .java srcFiles.
javaSrcFiles := srcFiles.FilterByExt(".java")
turbineSrcJars := append(android.Paths{kaptStubsJar}, srcJars...)
TurbineApt(ctx, srcJarOutputFile, resJarOutputFile, javaSrcFiles, turbineSrcJars, flags)
TurbineApt(ctx, headerJarOutputFile, srcJarOutputFile, resJarOutputFile, javaSrcFiles, turbineSrcJars, flags)
}
// kapt converts a list of key, value pairs into a base64 encoded Java serialization, which is what kapt expects.