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builder - cache rn project #254

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4b33b02
create android cached rn project for building
radoslawrolka Feb 11, 2026
2138c92
add cache for ios too
radoslawrolka Feb 11, 2026
bc53b7d
automate cache creation
radoslawrolka Feb 11, 2026
878f6ff
save cache before changes
radoslawrolka Feb 11, 2026
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24 changes: 24 additions & 0 deletions .github/workflows/build-library-android.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -57,6 +57,30 @@ jobs:
- name: 📦 Install dependencies
run: bun install

- name: ♻️ Restore RN project cache
id: rn-project-cache
uses: actions/cache/restore@v4
with:
path: ${{ runner.temp }}/rnrepo_build_app
key: ${{ runner.os }}-rn-project-cache-${{ inputs.react_native_version }}

- name: 📱 Create RN project (cache miss)
if: steps.rn-project-cache.outputs.cache-hit != 'true'
run: |
work_dir="${{ runner.temp }}"
mkdir -p "$work_dir"
cd "$work_dir"
bunx @react-native-community/cli@latest init rnrepo_build_app --version "${{ inputs.react_native_version }}" --skip-install
cd "$work_dir/rnrepo_build_app"
npm install

- name: 💾 Save RN project cache (clean)
if: steps.rn-project-cache.outputs.cache-hit != 'true'
uses: actions/cache/save@v4
with:
path: ${{ runner.temp }}/rnrepo_build_app
key: ${{ runner.os }}-rn-project-cache-${{ inputs.react_native_version }}

- name: 🔨 Build library for Android
run: bun run packages/builder/build-library-android.ts -- "${{ inputs.library_name }}" "${{ inputs.library_version }}" "${{ inputs.react_native_version }}" "${{ runner.temp }}" "${{ inputs.worklets_version }}"

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24 changes: 24 additions & 0 deletions .github/workflows/build-library-ios.yml
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Expand Up @@ -52,6 +52,30 @@ jobs:
- name: 📦 Install dependencies
run: bun install

- name: ♻️ Restore RN project cache
id: rn-project-cache
uses: actions/cache/restore@v4
with:
path: ${{ runner.temp }}/rnrepo_build_app
key: ${{ runner.os }}-rn-project-cache-${{ inputs.react_native_version }}

- name: 📱 Create RN project (cache miss)
if: steps.rn-project-cache.outputs.cache-hit != 'true'
run: |
work_dir="${{ runner.temp }}"
mkdir -p "$work_dir"
cd "$work_dir"
bunx @react-native-community/cli@latest init rnrepo_build_app --version "${{ inputs.react_native_version }}" --skip-install
cd "$work_dir/rnrepo_build_app"
npm install

- name: 💾 Save RN project cache (clean)
if: steps.rn-project-cache.outputs.cache-hit != 'true'
uses: actions/cache/save@v4
with:
path: ${{ runner.temp }}/rnrepo_build_app
key: ${{ runner.os }}-rn-project-cache-${{ inputs.react_native_version }}

- name: 🔨 Build library for iOS
run: bun run packages/builder/build-library-ios.ts -- "${{ inputs.library_name }}" "${{ inputs.library_version }}" "${{ inputs.react_native_version }}" "${{ runner.temp }}" "${{ inputs.worklets_version }}"

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24 changes: 14 additions & 10 deletions packages/builder/build-utils.ts
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Expand Up @@ -248,19 +248,23 @@ export async function setupReactNativeProject(
const { mkdirSync } = await import('fs');
mkdirSync(workDir, { recursive: true });

// Check that app directory doesn't exist yet
// If appDir already exists, assume it's a cached RN project and skip setup
if (existsSync(appDir)) {
throw new Error(`App directory ${appDir} already exists.`);
}
console.log(`♻️ Using cached React Native project at ${appDir}`);
} else {
// Create RN project in the work directory
console.log(
`📱 Creating temporary React Native project (RN ${reactNativeVersion})...`
);

// Create RN project in the work directory
console.log(
`📱 Creating temporary React Native project (RN ${reactNativeVersion})...`
);
await $`bunx @react-native-community/cli@latest init rnrepo_build_app --version ${reactNativeVersion} --skip-install`
.cwd(workDir)
.quiet();
}

await $`bunx @react-native-community/cli@latest init rnrepo_build_app --version ${reactNativeVersion} --skip-install`
.cwd(workDir)
.quiet();
if (!existsSync(join(appDir, 'package.json'))) {
throw new Error(`Invalid React Native project at ${appDir}`);
}

// Perform any library-specific setup before installing
await installSetup(appDir, libraryName, 'preInstall');
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