[ci] Only cache on postsubmit

Writes to a cache from a pull request are not visible elsewhere, so
* Build the caches in postsubmit so that they will be available eventually
  * While we're at it, run all tests as a postsubmit in case of rebase issues.
* Don't save caches in the PR so that they won't spam persistence.
* Also don't bother generating an emulator image for caching on PR workflows.

https://docs.github.com/en/actions/using-workflows/caching-dependencies-to-speed-up-workflows#restrictions-for-accessing-a-cache

While we're at it, switch to environments for better security since secrets could otherwise be available to pull requests before review, and add the patrol cache.

Fun fact: actions/runner#2238

.github/actions/avd/action.yml

@@ -13,6 +13,10 @@ inputs:
   target:
     description: Target image
     required: true
+  cache-save:
+    description: Whether or not to save the image.
+    required: false
+    default: ${{ github.event_name == 'push' }}
 runs:
   using: composite
   steps:
@@ -25,7 +29,7 @@ runs:
           ~/.android/adb*
         key: avd-${{ inputs.profile }}-${{ inputs.api-level }}-${{ inputs.arch }}-${{ inputs.target }}
     - name: Create AVD and generate snapshot for caching
-      if: steps.avd-cache.outputs.cache-hit != 'true'
+      if: ${{ !steps.avd-cache.outputs.cache-hit && input.cache-save == 'true' }}
       uses: reactivecircus/android-emulator-runner@v2
       with:
         profile: ${{ inputs.profile }}
@@ -36,10 +40,10 @@ runs:
         emulator-options: -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim
         script: echo "Generated AVD snapshot for caching."
     - name: AVD cache save
-      if: steps.avd-cache.outputs.cache-hit != 'true'
+      if: ${{ !steps.avd-cache.outputs.cache-hit && inputs.cache-save == 'true' }}
       uses: actions/cache/save@v3
       with:
         path: |
           ~/.android/avd/*
           ~/.android/adb*
-        key: ${{ steps.avd-cache.outputs.cache-primary-key }}
+        key: ${{ steps.avd-cache.outputs.cache-primary-key }}

.github/actions/flutter/action.yml

@@ -1,5 +1,10 @@
 name: Flutter
 description: Flutter checkout and PATH setup
+inputs:
+  cache-save:
+    description: Whether or not to save the flutter repo and pub caches.
+    required: false
+    default: ${{ github.event_name == 'push' }}
 runs:
   using: composite
   steps:
@@ -18,23 +23,35 @@ runs:
         path: flutter
         key: flutter@${{ steps.ls-remote.outputs.hash }}
     - name: Checkout
-      if: steps.checkout-cache.outputs.cache-hit != 'true'
+      if: ${{ !steps.checkout-cache.outputs.cache-hit }}
       uses: actions/checkout@v3
       with:
         repository: AsturaPhoenix/flutter
         ref: ${{ steps.ls-remote.outputs.hash }}
         path: flutter
         fetch-depth: 0 # to fetch tags to determine the Flutter version
     - name: Flutter checkout save
-      if: steps.checkout-cache.outputs.cache-hit != 'true'
+      if: ${{ !steps.checkout-cache.outputs.cache-hit && inputs.cache-save }}
       uses: actions/cache/save@v3
       with:
         path: flutter
         key: ${{ steps.checkout-cache.outputs.cache-primary-key }}
 
     - name: Flutter/pub cache
+      if: inputs.cache-save == 'true'
       uses: actions/cache@v3
-      id: pub-cache
+      with:
+        path: |
+          flutter/bin/cache
+          ~/.pub-cache
+        key: pub-${{ runner.os }}-${{ runner.arch }}-${{ steps.ls-remote.outputs.hash }}-${{ github.job }}-${{ github.sha }}
+        restore-keys: |
+          pub-${{ runner.os }}-${{ runner.arch }}-${{ steps.ls-remote.outputs.hash }}-${{ github.job }}-
+          pub-${{ runner.os }}-${{ runner.arch }}-${{ steps.ls-remote.outputs.hash }}-
+          pub-${{ runner.os }}-${{ runner.arch }}-
+    - name: Flutter/pub cache restore
+      if: inputs.cache-save != 'true'
+      uses: actions/cache/restore@v3
       with:
         path: |
           flutter/bin/cache
@@ -47,4 +64,4 @@ runs:
 
     - name: PATH
       run: '{ echo "$GITHUB_WORKSPACE/flutter/bin"; echo "$HOME/.pub-cache/bin"; } >> $GITHUB_PATH'
-      shell: bash
+      shell: bash

.github/workflows/pull_request.yml → .github/workflows/ci.yml

@@ -1,6 +1,8 @@
-name: Pull request
+name: CI
 
 on:
+ push:
+   branches: [master]
  pull_request:
    branches: [master]
 
@@ -180,6 +182,11 @@ jobs:
 
       - run: flutter pub get
 
+      - name: Patrol cache restore
+        uses: actions/cache/restore@v3
+        with:
+          path: ~/.cache/patrol
+          key: patrol-cache
       - name: Download native test apk
         uses: actions/download-artifact@v3
         with:
@@ -196,3 +203,71 @@ jobs:
           emulator-options: -no-snapshot-save -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim
           working-directory: trip_planner_aquamarine/app
           script: dart run patrol_cli:main drive -t integration_test/native_test.dart --use-application-binary build/app/outputs/flutter-apk/app-debug.apk
+      - name: Patrol cache save
+        if: github.event_name == 'push'
+        uses: actions/cache/save@v3
+        with:
+          path: ~/.cache/patrol
+          key: patrol-cache
+
+  deploy-alpha:
+    name: Deploy alpha
+    runs-on: ubuntu-latest
+    environment: alpha
+    if: github.event_name == 'push'
+    needs: linux-tests
+    concurrency: deploy-alpha
+    defaults:
+      run:
+        working-directory: trip_planner_aquamarine
+
+    steps:
+      - name: Check out repo
+        uses: actions/checkout@v3
+        with:
+          path: trip_planner_aquamarine
+      - name: Set up Flutter
+        uses: ./trip_planner_aquamarine/.github/actions/flutter
+
+      - run: cd app && flutter build web --base-href "/trip_planner_aquamarine/" --web-renderer canvaskit
+      - name: Package web build
+        run: cd app/build && tar -czf web.tar.gz web
+
+      - run: docker build -t aquamarine_server .
+      - run: docker save aquamarine_server -o aquamarine_server.tar
+
+      - name: Set up SSH
+        run: |
+          mkdir ~/.ssh
+          cd ~/.ssh
+          echo '${{ secrets.KNOWN_HOSTS }}' >> known_hosts
+          echo '${{ secrets.SSH }}' >> id_rsa
+          chmod 600 id_rsa
+
+      - name: Transfer web build
+        run: 'scp app/build/web.tar.gz imagipioneer@${{ vars.HOSTNAME }}:'
+      - name: Unpack and flip
+        run: |
+          ssh imagipioneer@${{ vars.HOSTNAME }} '
+            tar -xvf web.tar.gz &&
+            rm -rf trip_planner_aquamarine &&
+            mv web trip_planner_aquamarine &&
+            rm web.tar.gz'
+
+      - name: Transfer server
+        run: 'scp aquamarine_server.tar ${{ vars.USERNAME }}@${{ vars.HOSTNAME }}:aquamarine_server'
+      - name: Unpack and flip
+        run: |
+          ssh imagipioneer@${{ vars.HOSTNAME }} '
+            # Prune now to retain the previous image for rollbacks
+            sudo docker image prune -f;
+            cd aquamarine_server &&
+            sudo docker load -i aquamarine_server.tar &&
+            rm aquamarine_server.tar &&
+            sudo docker rm -f aquamarine_server;
+            sudo docker run \
+              --name aquamarine_server \
+              -d \
+              -p 1080:1080 \
+              --mount type=bind,src=./persistence,dst=/server/persistence \
+              aquamarine_server'