Use ruby/setup-ruby action and test app Gemfile for CI

.github/workflows/ruby.yml

@@ -23,20 +23,26 @@ jobs:
         solargraph-version:
           - "0.48.0"
           - "0.49.0"
+        rails-version:
+          - "7"
       fail-fast: false
 
     steps:
       - uses: actions/checkout@v2
-      - name: Cache RVM
+      - uses: ruby/setup-ruby@v1
+        with:
+          working-directory: spec/rails${{ matrix.rails-version }}
+          ruby-version: ${{ matrix.ruby-version }}
+          bundler-cache: true
+
+      - name: Cache yardoc
         uses: actions/cache@v3
         id: rvm
         with:
-          key: ${{ runner.os }}-rvm-${{ matrix.ruby-version }}
+          key: ${{ runner.os }}-yard-${{ matrix.ruby-version }}-${{ matrix.solargraph-version }}
           path: |
-            /home/runner/.rvm
             /home/runner/.yardoc
-            #/usr/local/rvm/
-      #- name: Setup upterm session
-      #  uses: lhotari/action-upterm@v1
-      - name: Test
-        run: "/bin/bash ./ci.sh ${{ matrix.ruby-version }} ${{ matrix.solargraph-version}}"
+
+      - name: RSpec
+        run: bundle exec rspec
+

solargraph-rails.gemspec

@@ -2,6 +2,9 @@ lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require 'solargraph/rails/version'
 
+
+solargraph_version = (ENV['CI'] && ENV['MATRIX_SOLARGRAPH_VERSION']) || ">= 0.48.0"
+
 Gem::Specification.new do |spec|
   spec.name = 'solargraph-rails'
   spec.version = Solargraph::Rails::VERSION
@@ -27,6 +30,6 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'rake', '~> 12.3.3'
   spec.add_development_dependency 'rspec', '~> 3.0'
 
-  spec.add_runtime_dependency 'solargraph'
+  spec.add_runtime_dependency 'solargraph', solargraph_version
   spec.add_runtime_dependency 'activesupport'
 end

spec/rails7/Gemfile

@@ -10,3 +10,8 @@ group :development do
   gem 'solargraph', require: false
   gem 'solargraph-rails', require: false, path: '../..'
 end
+
+group :test do
+  # not strictly needed but simplifies the CI setup.
+  gem 'rspec'
+end