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Enable hermesV1Enabled=true by default on Android #55040

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cortinico wants to merge 3 commits into from
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Enable hermesV1Enabled=true by default on Android #55040

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0ecaed3
Enable hermesV1Enabled=true by default on Android
cortinico Jan 5, 2026
ba27358
Fix tests
cortinico Jan 5, 2026
a08768c
Add compilerV1Version to Hermes version retrieval
cortinico Jan 6, 2026
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2 changes: 1 addition & 1 deletion gradle.properties
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Expand Up @@ -26,4 +26,4 @@ react.internal.useHermesStable=false
react.internal.useHermesNightly=true

# Controls whether to use Hermes 1.0. Clean and rebuild when changing.
hermesV1Enabled=false
hermesV1Enabled=true
2 changes: 1 addition & 1 deletion ...native-gradle-plugin/src/main/kotlin/com/facebook/react/internal/PrivateReactExtension.kt
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Expand Up @@ -59,5 +59,5 @@ abstract class PrivateReactExtension @Inject constructor(project: Project) {
val codegenDir: DirectoryProperty =
objects.directoryProperty().convention(root.dir("node_modules/@react-native/codegen"))

val hermesV1Enabled: Property<Boolean> = objects.property(Boolean::class.java).convention(false)
val hermesV1Enabled: Property<Boolean> = objects.property(Boolean::class.java).convention(true)
}
4 changes: 2 additions & 2 deletions ...in/react-native-gradle-plugin/src/main/kotlin/com/facebook/react/utils/DependencyUtils.kt
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Expand Up @@ -113,7 +113,7 @@ internal object DependencyUtils {
fun configureDependencies(
project: Project,
coordinates: Coordinates,
hermesV1Enabled: Boolean = false,
hermesV1Enabled: Boolean = true,
) {
if (
coordinates.versionString.isBlank() ||
Expand Down Expand Up @@ -149,7 +149,7 @@ internal object DependencyUtils {

internal fun getDependencySubstitutions(
coordinates: Coordinates,
hermesV1Enabled: Boolean = false,
hermesV1Enabled: Boolean = true,
): List<Triple<String, String, String>> {
val dependencySubstitution = mutableListOf<Triple<String, String, String>>()
val hermesVersion =
Expand Down
6 changes: 6 additions & 0 deletions ...lugin/react-native-gradle-plugin/src/main/kotlin/com/facebook/react/utils/ProjectUtils.kt
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Expand Up @@ -29,6 +29,8 @@ internal object ProjectUtils {

const val HERMES_FALLBACK = true

const val HERMES_V1_ENABLED_FALLBACK = true

internal fun Project.isNewArchEnabled(): Boolean = true

internal val Project.isHermesEnabled: Boolean
Expand Down Expand Up @@ -73,6 +75,7 @@ internal object ProjectUtils {

internal val Project.isHermesV1Enabled: Boolean
get() =
if (project.hasProperty(HERMES_V1_ENABLED) || project.hasProperty(SCOPED_HERMES_V1_ENABLED)) {
(project.hasProperty(HERMES_V1_ENABLED) &&
project.property(HERMES_V1_ENABLED).toString().toBoolean()) ||
(project.hasProperty(SCOPED_HERMES_V1_ENABLED) &&
Expand All @@ -81,6 +84,9 @@ internal object ProjectUtils {
project.extraProperties.get(HERMES_V1_ENABLED).toString().toBoolean()) ||
(project.extraProperties.has(SCOPED_HERMES_V1_ENABLED) &&
project.extraProperties.get(SCOPED_HERMES_V1_ENABLED).toString().toBoolean())
} else {
HERMES_V1_ENABLED_FALLBACK
}

internal fun Project.needsCodegenFromPackageJson(rootProperty: DirectoryProperty): Boolean {
val parsedPackageJson = readPackageJsonFile(this, rootProperty)
Expand Down
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