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ci: GitHub Actions workflow — build Android debug APK via Gradle (no EAS)
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‎.github/workflows/build-android.yml‎

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name: Build Android APK (debug)
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name: Build Android APK
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# Trigger on every push to the mobile branch, or manually
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on:
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push:
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branches: [feature/mobile-app]
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paths:
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- 'apps/native/**'
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- '.github/workflows/build-android.yml'
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workflow_dispatch:
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inputs:
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build_type:
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description: 'Build type (debug or release-unsigned)'
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required: false
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default: 'debug'
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jobs:
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build-android:
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name: Expo prebuild → Gradle assembleDebug
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build:
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name: Build Android APK
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runs-on: ubuntu-latest
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timeout-minutes: 90
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env:
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EXPO_PUBLIC_CONVEX_URL: https://placeholder.convex.cloud
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EXPO_PUBLIC_AUTH_BASE_URL: https://placeholder.convex.site
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GRADLE_OPTS: "-Dorg.gradle.jvmargs=-Xmx4096m -Dorg.gradle.daemon=false"
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EXPO_NO_TELEMETRY: "1"
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CI: "true"
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timeout-minutes: 60
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steps:
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- uses: actions/checkout@v4
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# ── 1. Checkout ─────────────────────────────────────────────────────────
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- name: Checkout repository
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uses: actions/checkout@v4
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with:
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ref: feature/mobile-app
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# ── 2. Java 17 (required by Gradle / React Native 0.74) ─────────────────
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- name: Set up Java 17
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uses: actions/setup-java@v4
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with:
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distribution: temurin
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java-version: '17'
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distribution: 'temurin'
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cache: gradle
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# ── 3. Node.js (Expo CLI needs Node) ────────────────────────────────────
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- name: Set up Node.js 20
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uses: actions/setup-node@v4
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with:
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node-version: '20'
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# ── 4. Install Bun ──────────────────────────────────────────────────────
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- name: Set up Bun
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uses: oven-sh/setup-bun@v2
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with:
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bun-version: latest
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- name: Set up Android SDK (clean)
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uses: android-actions/setup-android@v3
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# ── 5. Cache Bun modules ────────────────────────────────────────────────
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- name: Cache Bun dependencies
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uses: actions/cache@v4
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with:
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packages: >
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tools
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platform-tools
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platforms;android-34
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build-tools;34.0.0
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ndk;26.1.10909125
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cmake;3.22.1
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path: |
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~/.bun/install/cache
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node_modules
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apps/native/node_modules
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key: bun-${{ runner.os }}-${{ hashFiles('bun.lock', 'apps/native/package.json') }}
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restore-keys: bun-${{ runner.os }}-
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- uses: actions/setup-node@v4
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with: { node-version: '20' }
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# ── 6. Install workspace deps from repo root ────────────────────────────
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- name: Install dependencies (workspace root)
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run: bun install --frozen-lockfile
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- uses: oven-sh/setup-bun@v2
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with: { bun-version: '1.3.5' }
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# ── 7. Write placeholder .env (build succeeds; runtime needs real values)─
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- name: Create runtime env file for native app
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working-directory: apps/native
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run: |
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cat > .env << 'EOF'
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EXPO_PUBLIC_CONVEX_URL=https://placeholder.convex.cloud
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EXPO_PUBLIC_AUTH_BASE_URL=https://placeholder.convex.site
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EOF
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- name: Install native dependencies
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# ── 8. Create placeholder icon assets so prebuild doesn't fail ──────────
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- name: Create placeholder icon assets
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working-directory: apps/native
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run: bun install --ignore-scripts
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run: |
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mkdir -p assets/images
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# Generate a minimal 1024x1024 PNG using Python (always available on ubuntu)
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python3 - << 'PY'
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import struct, zlib
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def write_png(path, size=1024, color=(56, 201, 168, 255)):
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def chunk(name, data):
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c = struct.pack('>I', len(data)) + name + data
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return c + struct.pack('>I', zlib.crc32(name + data) & 0xffffffff)
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raw = b'\x00' + bytes(color) * size # one row
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raw_all = raw * size
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compressed = zlib.compress(raw_all)
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data = (b'\x89PNG\r\n\x1a\n' +
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chunk(b'IHDR', struct.pack('>IIBBBBB', size, size, 8, 2, 0, 0, 0)) +
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chunk(b'IDAT', compressed) +
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chunk(b'IEND', b''))
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with open(path, 'wb') as f:
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f.write(data)
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write_png('assets/images/icon.png')
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write_png('assets/images/adaptive-icon.png')
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write_png('assets/images/splash-icon.png', 512)
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write_png('assets/images/favicon.png', 48)
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print('Assets created.')
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PY
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- name: Expo prebuild
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# ── 9. Expo Prebuild – generates the android/ native project ────────────
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- name: Expo Prebuild (Android)
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working-directory: apps/native
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continue-on-error: true
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run: node_modules/.bin/expo prebuild --platform android --clean --no-install 2>&1
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run: |
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npx expo prebuild \
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--platform android \
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--clean \
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--no-install
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env:
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EXPO_NO_TELEMETRY: "1"
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EXPO_PUBLIC_CONVEX_URL: https://placeholder.convex.cloud
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EXPO_PUBLIC_AUTH_BASE_URL: https://placeholder.convex.site
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# Skip Expo telemetry
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EXPO_NO_TELEMETRY: '1'
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- name: Locate gradlew
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id: find-android
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# ── 10. Make gradlew executable ─────────────────────────────────────────
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- name: Make Gradlew executable
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working-directory: apps/native/android
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run: chmod +x gradlew
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# ── 11. Build Debug APK ──────────────────────────────────────────────────
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# A debug APK can be installed on any Android device with
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# "Install unknown apps" enabled — no keystore needed.
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- name: Build Debug APK
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working-directory: apps/native/android
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run: |
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GRADLEW=$(find . -name "gradlew" -not -path "*/node_modules/*" 2>/dev/null | head -1)
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[ -n "$GRADLEW" ] || { echo "No gradlew"; exit 1; }
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echo "gradlew=$GRADLEW" >> $GITHUB_OUTPUT
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echo "android_dir=$(dirname $GRADLEW)" >> $GITHUB_OUTPUT
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chmod +x $GRADLEW
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./gradlew assembleDebug \
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--no-daemon \
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--stacktrace \
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-Dorg.gradle.jvmargs="-Xmx4g -XX:MaxMetaspaceSize=512m -XX:+HeapDumpOnOutOfMemoryError" \
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-Dorg.gradle.parallel=false
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env:
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ANDROID_HOME: ${{ env.ANDROID_HOME }}
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- name: Cache Gradle
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uses: actions/cache@v4
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with:
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path: |
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~/.gradle/wrapper
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~/.gradle/caches
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key: ${{ runner.os }}-gradle-${{ hashFiles('**/gradle-wrapper.properties') }}-v2
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restore-keys: |
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${{ runner.os }}-gradle-
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- name: Build debug APK
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working-directory: ${{ steps.find-android.outputs.android_dir }}
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# ── 12. Rename APK with branch + SHA for traceability ───────────────────
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- name: Rename APK
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run: |
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echo "=== Build environment ==="
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echo "ANDROID_HOME=$ANDROID_HOME"
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ls $ANDROID_HOME/build-tools/ 2>/dev/null
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ls $ANDROID_HOME/platforms/ 2>/dev/null
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ls $ANDROID_HOME/ndk/ 2>/dev/null | head -3
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echo "=== Gradle build ==="
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./gradlew assembleDebug --no-daemon --no-build-cache --stacktrace 2>&1 | tee /tmp/gradle.log | tail -80
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- name: Upload Gradle log
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if: always()
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uses: actions/upload-artifact@v4
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with:
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name: gradle-build-log
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path: /tmp/gradle.log
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if-no-files-found: ignore
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retention-days: 7
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mkdir -p dist
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SHA=$(echo '${{ github.sha }}' | cut -c1-7)
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cp apps/native/android/app/build/outputs/apk/debug/app-debug.apk \
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dist/openchat-android-debug-${SHA}.apk
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echo "APK_NAME=openchat-android-debug-${SHA}.apk" >> $GITHUB_ENV
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echo "APK_PATH=dist/openchat-android-debug-${SHA}.apk" >> $GITHUB_ENV
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- name: Upload APK
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# ── 13. Upload APK as GitHub Actions artifact (30-day retention) ────────
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- name: Upload APK artifact
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uses: actions/upload-artifact@v4
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with:
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name: openchat-android-debug
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path: apps/native/android/app/build/outputs/apk/debug/app-debug.apk
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if-no-files-found: error
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name: ${{ env.APK_NAME }}
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path: ${{ env.APK_PATH }}
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retention-days: 30
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if-no-files-found: error
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# ── 14. Print download instructions ─────────────────────────────────────
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- name: Print download instructions
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run: |
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echo "=========================================================="
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echo " APK BUILD COMPLETE"
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echo "=========================================================="
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echo " File: ${{ env.APK_NAME }}"
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echo ""
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echo " To download:"
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echo " 1. Go to https://github.com/opencoredev/openchat/actions"
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echo " 2. Click this workflow run"
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echo " 3. Scroll to the Artifacts section at the bottom"
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echo " 4. Click the artifact name to download the .zip"
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echo " 5. Unzip → install the .apk on your Pixel 9:"
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echo " adb install openchat-android-debug-*.apk"
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echo " (or: copy to phone → tap to install with Files app)"
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echo "=========================================================="

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