Compose Multiplatform - localized strings.xml files ordering for deterministic build

Question

In Compose Multiplatform, can I specify the order in which localized strings.xml files (e.g., values-ar, values-de, etc.) are processed, so that it can be deterministic.

Right now i have a build that is non-deterministic, leading to the generation of inconsistent resource classes, such as String0_commonMainKt and String1_commonMainKt? This unpredictability stems from the inherent filesystem or plugin processing order and not something that's easily controlled.

Compose Multiplatform expects resources organized under composeResources, with subdirectories like:

composeResources/
  └── values/             — default language
  └── values-fr/          — French
  └── values-de/          — German
  └── values-es/          — Spanish
  └── ...


compose.resources {
    publicResClass = true
    packageOfResClass = "com.module.project.resources"
    generateResClass = always
}

Qualifiers like language, theme, and density are supported and prioritized when collecting resources JetBrains.

The documentation does not provide a mechanism to enforce a custom ordering when multiple resource variants are processed.

So is there a way to actually order this to ensure deterministic builds?

Update: graldle.properties file:

#Gradle
org.gradle.jvmargs=-Xmx4048M -Dfile.encoding=UTF-8 -Dkotlin.daemon.jvm.options\="-Xmx4048M" -XX:+UseSerialGC -Dkotlin.compiler.preciseCompilationResultsBackup=true

#Kotlin
kotlin.code.style=official

#Android
android.useAndroidX=true
android.nonTransitiveRClass=true

#MPP
kotlin.mpp.enableCInteropCommonization=true
kotlin.mpp.androidSourceSetLayoutVersion=2

org.jetbrains.compose.experimental.uikit.enabled=true
kotlin.native.cacheKind=none

android.ndkVersion=27.0.12077973

# 16KB Page Size Support, NDK r27: Enable flexible page size support for Android 15+ devices
android.native.buildOutput=verbose
android.native.useNativeCompilerSettingsCache=false

# FOR REPRODUCIBLE BUILDS
kotlin.native.binary.reproducible=true
kotlin.native.distribution.downloadFromMaven=true

# Compose compiler consistency
androidx.compose.compiler.reportsDestination=build/compose_reports
androidx.compose.compiler.metricsDestination=build/compose_metrics

# Source timestamp for reproducible builds
SOURCE_DATE_EPOCH=1640995200

# Force deterministic builds
kotlin.collections.hash.seed=0
kotlin.mpp.stability.nowarn=true
kotlin.compiler.execution.strategy=in-process
kotlin.daemon.useFallbackStrategy=false
kotlin.incremental=false
org.gradle.parallel=false
kotlin.incremental.multiplatform=false

Plamen Nikolov · Accepted Answer · 2025-08-26 18:42:46Z

1

You can achieve this by adding a custom Gradle task to order the resources, add this to your build.gradle.kts file:

tasks.withType<org.jetbrains.compose.resources.GenerateResClassTask> {
    doFirst {
        // Force consistent ordering by sorting resource directories
        val resourceDirs = project.file("src/commonMain/composeResources")
            .listFiles { file -> file.isDirectory && file.name.startsWith("values") }
            ?.sortedBy { it.name }
        
        // Set system property to ensure consistent processing
        System.setProperty("compose.resources.processing.order", 
            resourceDirs?.joinToString(",") { it.name } ?: "")
    }
}

answered Aug 26 at 18:42

Plamen Nikolov

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3 Comments

truthsayer Aug 28 at 11:35

Thanks for the answer, but then this also seems to be causing Unexpected diff output: Only in /tmp/tmp_6wu7beg/tmp_binaries_com.module.project.android_21.binary/content/assets/composeResources/com.module.project.resources: strings.xml When I tried running it on a CI. I think it solved the problem, but then created other problems.

Plamen Nikolov Aug 28 at 12:28

@truthsayer Can you try adding org.gradle.parallel=false in your gradle.properties

truthsayer Aug 28 at 22:45

That configuration is there, and I get the same issue. I have updated my question with my complete gradle.properties configurations.

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