deps: Add MySQL to CI workflow (#1398)

- also add dependabot workflow
- also standardize rails/ruby version quoting/ordering

Author: bf4

.github/dependabot.yml

@@ -0,0 +1,10 @@
+# Set update schedule for GitHub Actions
+
+version: 2
+updates:
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      # Check for updates to GitHub Actions every weekday
+      interval: "daily"

.github/workflows/ruby.yml

@@ -2,14 +2,26 @@ name: CI
 
 on:
   push:
-    branches: [ 'master', 'release-0-8', 'release-0-9', 'release-0-10' ]
+    branches: [ 'master', 'release-0-8', 'release-0-9', 'release-0-10', 'v0-11-dev' ]
   pull_request:
     branches: ['**']
 
 jobs:
   tests:
     runs-on: ubuntu-latest
     services:
+      mysql:
+        image: mysql
+        env:
+          MYSQL_ROOT_PASSWORD: root
+          MYSQL_DATABASE: test
+        ports:
+          - 3306:3306
+        options: >-
+          --health-cmd "mysqladmin ping"
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
       postgres:
         image: postgres
         env:
@@ -26,43 +38,44 @@ jobs:
       fail-fast: false
       matrix:
         ruby:
-          - 2.6
-          - 2.7
+          - '3.2'
+          - '3.1'
           - '3.0'
-          - 3.1
-          - 3.2
+          - '2.7'
+          - '2.6'
         rails:
-          - 7.0.4
-          - 6.1.7
-          - 6.0.6
-          - 5.2.8.1
-          - 5.1.7
+          - '7.0'
+          - '6.1'
+          - '6.0'
+          - '5.2'
+          - '5.1'
         database_url:
-          - postgresql://postgres:password@localhost:5432/test
           - sqlite3:test_db
+          - postgresql://postgres:password@localhost:5432/test
+          - mysql2://root:root@127.0.0.1:3306/test
         exclude:
-          - ruby: 3.2
-            rails: 6.0.6
-          - ruby: 3.2
-            rails: 5.2.8.1
-          - ruby: 3.2
-            rails: 5.1.7
-          - ruby: 3.1
-            rails: 6.0.6
-          - ruby: 3.1
-            rails: 5.2.8.1
-          - ruby: 3.1
-            rails: 5.1.7
+          - ruby: '3.2'
+            rails: '6.0'
+          - ruby: '3.2'
+            rails: '5.2'
+          - ruby: '3.2'
+            rails: '5.1'
+          - ruby: '3.1'
+            rails: '6.0'
+          - ruby: '3.1'
+            rails: '5.2'
+          - ruby: '3.1'
+            rails: '5.1'
           - ruby: '3.0'
-            rails: 6.0.6
+            rails: '6.0'
           - ruby: '3.0'
-            rails: 5.2.8.1
+            rails: '5.2'
           - ruby: '3.0'
-            rails: 5.1.7
-          - ruby: 2.6
-            rails: 7.0.4
+            rails: '5.1'
+          - ruby: '2.6'
+            rails: '7.0'
           - database_url: postgresql://postgres:password@localhost:5432/test
-            rails: 5.1.7
+            rails: '5.1'
     env:
       RAILS_VERSION: ${{ matrix.rails }}
       DATABASE_URL: ${{ matrix.database_url }}
@@ -73,7 +86,6 @@ jobs:
         uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}
-      - name: Install dependencies
-        run: bundle install --jobs 4 --retry 3
+          bundler-cache: true
       - name: Run tests
         run: bundle exec rake test

Gemfile

@@ -10,6 +10,7 @@ version = ENV['RAILS_VERSION'] || 'default'
 
 platforms :ruby do
   gem 'pg'
+  gem 'mysql2'
 
   if version.start_with?('4.2', '5.0')
     gem 'sqlite3', '~> 1.3.13'
@@ -26,4 +27,4 @@ when 'default'
   gem 'railties', '>= 6.0'
 else
   gem 'railties', "~> #{version}"
-end
+end