Remove hermesV1Enabled Gradle property and simplify Hermes version resolution (#56733)#56733
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cipolleschi wants to merge 2 commits intofacebook:mainfrom
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Remove hermesV1Enabled Gradle property and simplify Hermes version resolution (#56733)#56733cipolleschi wants to merge 2 commits intofacebook:mainfrom
cipolleschi wants to merge 2 commits intofacebook:mainfrom
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…solution (#56733) Summary: - Remove `hermesV1Enabled` / `react.hermesV1Enabled` Gradle property and all branching it controls - Rename `HERMES_V1_VERSION_NAME` to `HERMES_VERSION_NAME` in `version.properties` - Remove `hermesV1Enabled` from `PrivateReactExtension`, `ProjectUtils`, `PropertyUtils`, `ReactPlugin` - Simplify `DependencyUtils.Coordinates` to single Hermes version - Make `-DHERMESVM_HEAP_HV_MODE=HEAP_HV_PREFER32` CMake flag unconditional - Remove `-DHERMES_V1_ENABLED=1` CMake argument from `ReactAndroid` and Fantom builds - Delete `hermesV1Enabled=true` from `gradle.properties` - Update all Gradle plugin tests ## Changelog: [Android][Removed] - Remove hermesV1Enabled and simplify the code ## Test plan - [x] Gradle plugin: `./gradlew -p packages/gradle-plugin build` — BUILD SUCCESSFUL, all tests pass - [x] Android: `./gradlew :packages:rn-tester:android:app:assembleDebug` — BUILD SUCCESSFUL Reviewed By: cortinico Differential Revision: D104244582
facebook#56731) Summary: - Remove all dead C++ code behind `!defined(HERMES_V1_ENABLED)` guards in `HermesExecutorFactory.cpp` and `HermesInstance.cpp` - Delete `Registration.h`, `Registration.cpp`, `ConnectionDemux.h`, `ConnectionDemux.cpp`, and `ConnectionDemuxTests.cpp` (entirely legacy code) - Remove `HERMES_V1_ENABLED` compile definition from `react-native-flags.cmake` - Remove `HERMES_V1_ENABLED` cache variable from Android `CMakeLists.txt` This is Phase 1 of removing legacy Hermes support. Since Hermes V1 is already the default on all platforms and the 0.86 branch has been cut, all legacy Hermes code is dead and can be safely removed. ## Changelog: [General][Breaking] - Remove Legacy Hermes from C++ code ## Test plan - [x] Android: `./gradlew :packages:rn-tester:android:app:assembleDebug` — BUILD SUCCEEDED - [x] iOS: `xcodebuild` rn-tester on iPhone 16 Pro simulator — BUILD SUCCEEDED Reviewed By: cortinico Differential Revision: D104228879
…solution (facebook#56733) Summary: - Remove `hermesV1Enabled` / `react.hermesV1Enabled` Gradle property and all branching it controls - Rename `HERMES_V1_VERSION_NAME` to `HERMES_VERSION_NAME` in `version.properties` - Remove `hermesV1Enabled` from `PrivateReactExtension`, `ProjectUtils`, `PropertyUtils`, `ReactPlugin` - Simplify `DependencyUtils.Coordinates` to single Hermes version - Make `-DHERMESVM_HEAP_HV_MODE=HEAP_HV_PREFER32` CMake flag unconditional - Remove `-DHERMES_V1_ENABLED=1` CMake argument from `ReactAndroid` and Fantom builds - Delete `hermesV1Enabled=true` from `gradle.properties` - Update all Gradle plugin tests ## Changelog: [Android][Removed] - Remove hermesV1Enabled and simplify the code ## Test plan - [x] Gradle plugin: `./gradlew -p packages/gradle-plugin build` — BUILD SUCCESSFUL, all tests pass - [x] Android: `./gradlew :packages:rn-tester:android:app:assembleDebug` — BUILD SUCCESSFUL Reviewed By: cortinico Differential Revision: D104244582
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meta-codesync Bot
pushed a commit
that referenced
this pull request
May 8, 2026
…solution (#56733) Summary: - Remove `hermesV1Enabled` / `react.hermesV1Enabled` Gradle property and all branching it controls - Rename `HERMES_V1_VERSION_NAME` to `HERMES_VERSION_NAME` in `version.properties` - Remove `hermesV1Enabled` from `PrivateReactExtension`, `ProjectUtils`, `PropertyUtils`, `ReactPlugin` - Simplify `DependencyUtils.Coordinates` to single Hermes version - Make `-DHERMESVM_HEAP_HV_MODE=HEAP_HV_PREFER32` CMake flag unconditional - Remove `-DHERMES_V1_ENABLED=1` CMake argument from `ReactAndroid` and Fantom builds - Delete `hermesV1Enabled=true` from `gradle.properties` - Update all Gradle plugin tests ## Changelog: [Android][Removed] - Remove hermesV1Enabled and simplify the code ## Test plan - [x] Gradle plugin: `./gradlew -p packages/gradle-plugin build` — BUILD SUCCESSFUL, all tests pass - [x] Android: `./gradlew :packages:rn-tester:android:app:assembleDebug` — BUILD SUCCESSFUL Reviewed By: cortinico Differential Revision: D104244582
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Summary:
hermesV1Enabled/react.hermesV1EnabledGradle property and all branching it controlsHERMES_V1_VERSION_NAMEtoHERMES_VERSION_NAMEinversion.propertieshermesV1EnabledfromPrivateReactExtension,ProjectUtils,PropertyUtils,ReactPluginDependencyUtils.Coordinatesto single Hermes version-DHERMESVM_HEAP_HV_MODE=HEAP_HV_PREFER32CMake flag unconditional-DHERMES_V1_ENABLED=1CMake argument fromReactAndroidand Fantom buildshermesV1Enabled=truefromgradle.propertiesChangelog:
[Android][Removed] - Remove hermesV1Enabled and simplify the code
Test plan
./gradlew -p packages/gradle-plugin build— BUILD SUCCESSFUL, all tests pass./gradlew :packages:rn-tester:android:app:assembleDebug— BUILD SUCCESSFULReviewed By: cortinico
Differential Revision: D104244582