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fix(ci): serialize :amethyst Kotlin compilations to stop daemon OOMs

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CI runs die with java.lang.OutOfMemoryError (GC overhead limit exceeded /
Java heap space) inside the shared Kotlin compile daemon when two variant
compilations of :amethyst run at the same time — e.g. compilePlayDebugKotlin
and compilePlayBenchmarkKotlin in the test-and-build-android job, which
demands four :amethyst variants (unit tests, lint, assembleBenchmark) in one
invocation. KotlinCompile submits its work asynchronously via the Worker
API, so the project lock is released while compilation is still running in
the daemon and Gradle happily starts the next variant's compile task in
parallel; two full :amethyst codegen passes no longer fit the daemon's
-Xmx8g heap (see runs 29260711359 and 29248908870; removing Kover in #3539
helped but was not sufficient).

Register a no-op shared build service with maxParallelUsages = 1 and make
every :amethyst KotlinCompile task use it. The scheduler then runs this
module's Kotlin compilations one at a time — a task holding the service is
not complete until its async worker finishes — while all other work (other
modules' compilation, JVM tests, lint analysis, packaging) keeps running in
parallel. Verified with Worker-API probe tasks: unconstrained same-project
tasks start simultaneously; with usesService they run strictly one after
the other.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018ifbUGCADckUb3zaox9wBo
This commit is contained in:
Claude
2026-07-13 15:56:51 +00:00
parent b6560ab3f4
commit ed04c373b8
1 changed files with 22 additions and 0 deletions
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amethyst/build.gradle.kts
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@@ -1,4 +1,7 @@
import org.gradle.api.services.BuildService
import org.gradle.api.services.BuildServiceParameters
import org.jetbrains.kotlin.gradle.dsl.JvmTarget
import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
plugins {
alias(libs.plugins.androidApplication)
@@ -342,6 +345,25 @@ kotlin {
}
}
// Gradle schedules Kotlin compilations of different variants of this module
// concurrently (e.g. playDebug + playBenchmark when CI runs unit tests, lint,
// and assembleBenchmark in one invocation), but they all share a single Kotlin
// daemon whose heap (kotlin.daemon.jvmargs) cannot fit two full :amethyst
// codegen passes — CI runs died with "GC overhead limit exceeded" inside the
// daemon. This no-op shared build service with maxParallelUsages = 1 tells the
// scheduler to run this module's Kotlin compile tasks one at a time; other
// projects' tasks (JVM tests, lint analysis, packaging) still run in parallel.
abstract class AmethystKotlinCompileLimiter : BuildService<BuildServiceParameters.None>
val kotlinCompileLimiter =
gradle.sharedServices.registerIfAbsent("amethystKotlinCompileLimiter", AmethystKotlinCompileLimiter::class) {
maxParallelUsages.set(1)
}
tasks.withType<KotlinCompile>().configureEach {
usesService(kotlinCompileLimiter)
}
composeCompiler {
reportsDestination = layout.buildDirectory.dir("compose_compiler")
metricsDestination = layout.buildDirectory.dir("compose_compiler")