DEV: Update CI workflows (#58)

Co-authored-by: CvX <CvX@users.noreply.github.com>

.github/workflows/plugin-tests.yml

@@ -10,14 +10,13 @@ jobs:
   build:
     name: ${{ matrix.build_type }}
     runs-on: ubuntu-latest
-    container: discourse/discourse_test:release
+    container: discourse/discourse_test:slim${{ matrix.build_type == 'frontend' && '-browsers' || '' }}
     timeout-minutes: 60
 
     env:
       DISCOURSE_HOSTNAME: www.example.com
       RUBY_GLOBAL_METHOD_CACHE_SIZE: 131072
       RAILS_ENV: test
-      PGHOST: postgres
       PGUSER: discourse
       PGPASSWORD: discourse
 
@@ -26,23 +25,7 @@ jobs:
 
       matrix:
         build_type: ["backend", "frontend"]
-        ruby: ["2.7"]
-        postgres: ["13"]
-
-    services:
-      postgres:
-        image: postgres:${{ matrix.postgres }}
-        ports:
-          - 5432:5432
-        env:
-          POSTGRES_USER: discourse
-          POSTGRES_PASSWORD: discourse
-        options: >-
-          --mount type=tmpfs,destination=/var/lib/postgresql/data
-          --health-cmd pg_isready
-          --health-interval 10s
-          --health-timeout 5s
-          --health-retries 5
+
     steps:
       - uses: actions/checkout@v2
         with:
@@ -59,16 +42,25 @@ jobs:
         run: |
           git config --global user.email "ci@ci.invalid"
           git config --global user.name "Discourse CI"
+
       - name: Start redis
         run: |
           redis-server /etc/redis/redis.conf &
+      
+      - name: Start Postgres
+        run: |
+          chown -R postgres /var/run/postgresql
+          sudo -E -u postgres script/start_test_db.rb
+          sudo -u postgres psql -c "CREATE ROLE $PGUSER LOGIN SUPERUSER PASSWORD '$PGPASSWORD';"
+
       - name: Bundler cache
         uses: actions/cache@v2
         with:
           path: vendor/bundle
-          key: ${{ runner.os }}-${{ matrix.ruby }}-gem-${{ hashFiles('**/Gemfile.lock') }}
+          key: ${{ runner.os }}-gem-${{ hashFiles('**/Gemfile.lock') }}
           restore-keys: |
-            ${{ runner.os }}-${{ matrix.ruby }}-gem-
+            ${{ runner.os }}-gem-
+
       - name: Setup gems
         run: |
           bundle config --local path vendor/bundle
@@ -76,6 +68,7 @@ jobs:
           bundle config --local without development
           bundle install --jobs 4
           bundle clean
+
       - name: Lint English locale
         if: matrix.build_type == 'backend'
         run: bundle exec ruby script/i18n_lint.rb "plugins/${{ github.event.repository.name }}/locales/{client,server}.en.yml"
@@ -89,16 +82,47 @@ jobs:
         id: yarn-cache
         with:
           path: ${{ steps.yarn-cache-dir.outputs.dir }}
-          key: ${{ runner.os }}-${{ matrix.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
           restore-keys: |
-            ${{ runner.os }}-${{ matrix.os }}-yarn-
+            ${{ runner.os }}-yarn-
+
       - name: Yarn install
         run: yarn install
 
-      - name: Migrate database
+      - name: Fetch app state cache
+        uses: actions/cache@v2
+        id: app-cache
+        with:
+          path: tmp/app-cache
+          key: >- # postgres version, hash of migrations, "parallel?"
+            ${{ runner.os }}-
+            ${{ hashFiles('.github/workflows/tests.yml') }}-
+            ${{ matrix.postgres }}-
+            ${{ hashFiles('db/**/*', 'plugins/**/db/**/*') }}-
+            ${{ env.USES_PARALLEL_DATABASES }}
+
+      - name: Restore database from cache
+        if: steps.app-cache.outputs.cache-hit == 'true'
+        run: psql -f tmp/app-cache/cache.sql postgres
+
+      - name: Restore uploads from cache
+        if: steps.app-cache.outputs.cache-hit == 'true'
+        run: rm -rf public/uploads && cp -r tmp/app-cache/uploads public/uploads
+
+      - name: Create and migrate database
+        if: steps.app-cache.outputs.cache-hit != 'true'
         run: |
           bin/rake db:create
           bin/rake db:migrate
+
+      - name: Dump database for cache
+        if: steps.app-cache.outputs.cache-hit != 'true'
+        run: mkdir -p tmp/app-cache && pg_dumpall > tmp/app-cache/cache.sql
+
+      - name: Dump uploads for cache
+        if: steps.app-cache.outputs.cache-hit != 'true'
+        run: rm -rf tmp/app-cache/uploads && cp -r public/uploads tmp/app-cache/uploads
+
       - name: Check spec existence
         id: check_spec
         shell: bash
@@ -106,6 +130,7 @@ jobs:
           if [ 0 -lt $(find plugins/${{ github.event.repository.name }}/spec -type f -name "*.rb" 2> /dev/null | wc -l) ]; then
             echo "::set-output name=files_exist::true"
           fi
+
       - name: Plugin RSpec
         if: matrix.build_type == 'backend' && steps.check_spec.outputs.files_exist == 'true'
         run: bin/rake plugin:spec[${{ github.event.repository.name }}]
@@ -117,6 +142,7 @@ jobs:
           if [ 0 -lt $(find plugins/${{ github.event.repository.name }}/test/javascripts -type f \( -name "*.js" -or -name "*.es6" \) 2> /dev/null | wc -l) ]; then
             echo "::set-output name=files_exist::true"
           fi
+
       - name: Plugin QUnit
         if: matrix.build_type == 'frontend' && steps.check_qunit.outputs.files_exist == 'true'
         run: bundle exec rake plugin:qunit['${{ github.event.repository.name }}','1200000']