tests/emulator, .github/workflows/emulator: add

.github/workflows/emulator.yml

@@ -0,0 +1,100 @@
+name: Test nix-on-droid in an emulator
+on:
+  pull_request:
+  push:
+  schedule:
+    - cron: 0 0 * * 1
+
+jobs:
+  emulate:
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+
+    strategy:
+      fail-fast: false
+      matrix:
+        api-level: [29]
+        # below 28: didn't start, IDK why
+        # 34: sometimes work, but doesn't seem stable, even w/o caching images
+        way:
+          - bootstrap_flakes
+          - bootstrap_channels
+          - poke_around
+          - test_channels_uiautomator
+          - test_channels_shell
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install Nix / enable KVM
+        uses: DeterminateSystems/nix-installer-action@main
+
+      - name: Setup cachix
+        uses: cachix/cachix-action@v14
+        with:
+          name: nix-on-droid
+          signingKey: "${{ secrets.CACHIX_SIGNING_KEY }}"
+
+      - name: Build droidctl
+        run: nix build 'github:t184256/droidctl' --out-link droidctl
+
+      - name: Build zipball, channel tarball and flake to inject
+        run: |
+          rm -rf n-o-d
+          mkdir -p n-o-d
+          git -C . archive --format=tar.gz --prefix n-o-d/ HEAD > n-o-d/archive.tar.gz
+          ARCHES=x86_64 nix run '.#deploy' -- file:///data/local/tmp/n-o-d/archive.tar.gz n-o-d/
+
+      - name: Configure AVD cache
+        if: matrix.api-level == 29
+        uses: actions/cache@v4
+        id: avd-cache
+        with:
+          path: |
+            ~/.android/avd/*
+            ~/.android/adb*
+          key: avd-${{ matrix.api-level }}-${{ matrix.way }}  # concurrent save
+
+      - name: Create AVD and generate snapshot for caching
+        if: matrix.api-level == 29 && steps.avd-cache.outputs.cache-hit != 'true'
+        uses: reactivecircus/android-emulator-runner@v2
+        with:
+          target: default
+          arch: x86_64
+          api-level: ${{ matrix.api-level }}
+          force-avd-creation: false
+          emulator-options: -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
+          disable-animations: false
+          script: echo "Generated AVD snapshot for caching."
+
+      - name: Test way=${{ matrix.way}} api-level=${{ matrix.api-level }}
+        uses: reactivecircus/android-emulator-runner@v2
+        with:
+          target: default
+          arch: x86_64
+          api-level: ${{ matrix.api-level }}
+          force-avd-creation: false
+          emulator-options: -no-snapshot-save -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
+          disable-animations: true
+          # https://github.com/ReactiveCircus/android-emulator-runner/issues/385
+          script: >
+            trap 'pkill --exact --echo --signal SIGKILL crashpad_handle || true' EXIT &&
+            adb shell 'rm -rf /data/local/tmp/n-o-d' &&
+            adb push n-o-d /data/local/tmp/ &&
+            echo 'pushed' &&
+            adb shell 'cd /data/local/tmp/n-o-d && tar xzof archive.tar.gz && mv n-o-d unpacked' &&
+            echo 'unpacked' &&
+            cd tests/emulator &&
+            adb shell settings put secure enabled_accessibility_services com.google.android.marvin.talkback/com.google.android.marvin.talkback.TalkBackService &&
+            echo 'ready' &&
+            nix run 'github:t184256/droidctl' -- run ${{ matrix.way }}.py
+            # TODO: push to cachix from within the emulator
+
+      - name: Upload screenshots
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: screenshots-${{ matrix.way }}-${{ matrix.api-level }}
+          path: tests/emulator/screenshots
+          if-no-files-found: warn # 'error' or 'ignore' are also available