Add RNRepo to ci builds

[radoslawrolka]

Description

Adds RNRepo build-tools integration to basic-example so that CI builds can consume pre-built native dependencies instead of compiling them from scratch, speeding up CI.

The integration is guarded by CI=true / ENV['CI'] environment variables, so local development is unaffected. react-native-gesture-handler itself is excluded from prebuilds via rnrepo.config.json so that CI always builds and tests the library from source.

Changes

• apps/basic-example/android/build.gradle — resolves @rnrepo/build-tools via Node and adds its Gradle plugin JAR to the buildscript classpath.
• apps/basic-example/android/app/build.gradle — applies org.rnrepo.tools.prebuilds-plugin when running in CI.
• apps/basic-example/ios/Podfile — requires the RNRepo CocoaPods plugin and calls rnrepo_post_install in the post_install hook, both gated on ENV['CI'].
• apps/basic-example/package.json — adds @rnrepo/build-tools ~0.1.3-beta.0 as a dev dependency.
• rnrepo.config.json — root-level RNRepo config that denylists react-native-gesture-handler on both Android and iOS so the library itself is always compiled from source.

Performance

CI build time comparison (rnrepo vs baseline):

Platform	Category	rnrepo	basic	Faster
Android	Without runner cache	6:41	11:01	39.3%
Android	With runner cache	6:31 avg	10:25 avg	37.4%
iOS	Without runner cache	2:44	3:16	16.3%
iOS	With runner cache	2:47 avg	3:14 avg	13.9%

Android sees ~38% improvement across the board. iOS builds are ~15% faster even without prebuilt rncore.

Test plan

• Verified that a local build (without CI=true) still works without any RNRepo-related side effects.
• CI run with CI=true should pick up pre-built artifacts via the RNRepo plugin on both Android and iOS.
• react-native-gesture-handler is excluded from prebuilds via the denylist, ensuring the library under test is always built fresh.

[Copilot]

Pull request overview

Adds RNRepo prebuilt native dependency support to the apps/basic-example CI build path so the example app can reuse prebuilt artifacts in CI while still building react-native-gesture-handler itself from source.

Changes:

• Adds @rnrepo/build-tools to the basic example app and lockfile.
• Wires RNRepo into Android Gradle and iOS CocoaPods setup behind CI checks.
• Adds a root rnrepo.config.json denylist so react-native-gesture-handler is excluded from prebuild consumption.

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
yarn.lock	Locks the new RNRepo build-tools dependency.
rnrepo.config.json	Adds RNRepo denylist configuration for Android/iOS.
apps/basic-example/package.json	Declares RNRepo build-tools for the example app.
apps/basic-example/ios/Podfile	Loads and runs the RNRepo CocoaPods hook in CI.
apps/basic-example/android/build.gradle	Resolves and adds the RNRepo Gradle plugin JAR to the buildscript classpath.
apps/basic-example/android/app/build.gradle	Applies the RNRepo prebuilds plugin when CI=true.

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[radoslawrolka]

react-native-gesture-handler uses the same version in package.json as the one published on npm (unlike some libraries that use placeholder versions like 1000.0.0 for the main branch). To prevent it from being replaced with a prebuilt version, it needs to be added to the denyList in rnrepo.config.json.

RNRepo looks for rnrepo.config.json in the directory containing node_modules/react-native/, which in this case is the repository root. If having rnrepo.config.json in the root is a problem, I can work on alternative solutions.

[Copilot]

Pull request overview

Copilot reviewed 7 out of 8 changed files in this pull request and generated 3 comments.

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