Reuse local EAS builds for nightly E2E

.github/workflows/nightly-e2e.yml

@@ -117,6 +117,29 @@ jobs:
           xcrun simctl bootstatus "$udid" -b
           echo "Using $device_name on $runtime_name ($udid)"
 
+      - name: Mark iOS development client build phase
+        run: echo "Building the iOS development client" > artifacts/ios/phase.txt
+
+      - name: Build iOS development client
+        uses: ./.github/actions/eas-local-build
+        with:
+          platform: ios
+          profile: e2e
+          output: ${{ runner.temp }}/nightly-e2e-ios.tar.gz
+          log-path: artifacts/ios/build.log
+
+      - name: Install iOS development client
+        run: |
+          build_contents="$RUNNER_TEMP/nightly-e2e-ios-build"
+          mkdir -p "$build_contents"
+          tar -xzf "$RUNNER_TEMP/nightly-e2e-ios.tar.gz" -C "$build_contents"
+          app_path=$(find "$build_contents" -type d -name '*.app' -print -quit)
+          if [ -z "$app_path" ]; then
+            echo "The local EAS build did not contain an iOS simulator app" >&2
+            exit 1
+          fi
+          xcrun simctl install "$IOS_UDID" "$app_path" 2>&1 | tee -a artifacts/ios/build.log
+
       - name: Run iOS Maestro suite
         run: .github/scripts/run-nightly-e2e.sh ios "$IOS_UDID"
 
@@ -252,6 +275,22 @@ jobs:
           adb -s emulator-5554 shell settings put global transition_animation_scale 0
           adb -s emulator-5554 shell settings put global animator_duration_scale 0
 
+      - name: Mark Android development client build phase
+        run: echo "Building the Android development client" > artifacts/android/phase.txt
+
+      - name: Build Android development client
+        uses: ./.github/actions/eas-local-build
+        with:
+          platform: android
+          profile: e2e
+          output: ${{ runner.temp }}/nightly-e2e-android.apk
+          log-path: artifacts/android/build.log
+
+      - name: Install Android development client
+        run: |
+          adb -s emulator-5554 install -r "$RUNNER_TEMP/nightly-e2e-android.apk" \
+            2>&1 | tee -a artifacts/android/build.log
+
       - name: Run Android Maestro suite
         run: .github/scripts/run-nightly-e2e.sh android emulator-5554