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Update build args for reproducible builds.

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This commit is contained in:
Greyson Parrelli
2026-09-22 09:18:11 -04:00
parent c59755034d
commit 29bab0b1be
1 changed files with 5 additions and 8 deletions
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gradle.properties
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@@ -1,12 +1,9 @@
# R8 in AGP 9.x is non-deterministic, producing intermittent dex differences between
# otherwise-identical builds. Two flags work together to stabilize it:
# - -Dcom.android.tools.r8.deterministicdebugging=true runs R8 compilation in a
# single thread and without randomly shuffling the input.
# - -XX:hashCode=3 (deterministic incrementing Object.identityHashCode) removes
# IdentityHashMap iteration-order non-determinism inside R8 (e.g. in
# KotlinClassMetadataReader, which decides whether to keep the Signature attribute
# on Kotlin generic lambda subclasses).
# To prevent non-deterministic R8 issues, we set some flags.
# The determinstic debugging one is self-explanatory, but also not as far-reaching as you'd hope.
# The hashcode one uses a more determinstic hashcode (an incrementing counter).
# Paired with the threadPoolSize=1 below, this should give us what we need.
org.gradle.jvmargs=-Xmx12g -Xms256m -XX:MaxMetaspaceSize=1g -Dcom.android.tools.r8.deterministicdebugging=true -XX:+UnlockExperimentalVMOptions -XX:hashCode=3
android.r8.threadPoolSize=1
# Without this, the Kotlin compile daemon inherits -Xmx12g from org.gradle.jvmargs.
kotlin.daemon.jvmargs=-Xmx4g -XX:MaxMetaspaceSize=512m