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Isolate Kotlin compiler instances for Multiplex workers. #515

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Apr 1, 2021
+6 −3
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Isolate Kotlin compiler instances for Multiplex workers. #515

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9 changes: 6 additions & 3 deletions src/main/kotlin/io/bazel/kotlin/builder/toolchain/KotlinToolchain.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -163,16 +163,18 @@ class KotlinToolchain private constructor(
toolchain: KotlinToolchain,
clazz: String
) {
private val compiler: Any
private val execMethod: Method
private val getCodeMethod: Method
private val compilerClass = toolchain.classLoader.loadClass(clazz)

init {
val compilerClass = toolchain.classLoader.loadClass(clazz)
// Disables disposing of the environment which is required when running parallel builds. This
// follows the behavior of the Kotlin compiler daemon.
System.setProperty("kotlin.environment.keepalive", "true")

val exitCodeClass =
toolchain.classLoader.loadClass("org.jetbrains.kotlin.cli.common.ExitCode")

compiler = compilerClass.getConstructor().newInstance()
execMethod =
compilerClass.getMethod("exec", PrintStream::class.java, Array<String>::class.java)
getCodeMethod = exitCodeClass.getMethod("getCode")
Expand All @@ -183,6 +185,7 @@ class KotlinToolchain private constructor(
// 2 is an internal error
// 3 is the script execution error
fun compile(args: Array<String>, out: PrintStream): Int {
val compiler = compilerClass.getConstructor().newInstance()
val exitCodeInstance = execMethod.invoke(compiler, out, args)
return getCodeMethod.invoke(exitCodeInstance, *NO_ARGS) as Int
}
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