only use gem source for linter tests - to fix https://www.redmine.org/issues/35028

.github/workflows/linters.yml

@@ -18,19 +18,9 @@ jobs:
         ruby-version: 2.6
         bundler-cache: true
 
-    - name: Set Gemfile
-      run: |
-        echo "">> Gemfile
-        echo "group :test do">> Gemfile
-        echo "  gem 'pandoc-ruby', require: false" >> Gemfile
-        echo "  gem 'rubocop', require: false" >> Gemfile
-        echo "  gem 'rubocop-performance', require: false" >> Gemfile
-        echo "  gem 'rubocop-rails', require: false" >> Gemfile
-        echo "  gem 'slim_lint', require: false" >> Gemfile
-        echo "end">> Gemfile
-
     - name: Setup gems
       run: |
+        cp test/support/gemfile.rb Gemfile
         bundle install --jobs 4 --retry 3
 
     - name: Run RuboCop

Gemfile

@@ -1,4 +1,2 @@
-source 'https://rubygems.org'
-
 # Specify your gem's dependencies in additionals.gemspec
 gemspec

test/support/gemfile.rb

@@ -0,0 +1,10 @@
+source 'https://rubygems.org'
+
+group :test do
+  gem 'brakeman', require: false
+  gem 'pandoc-ruby', require: false
+  gem 'rubocop', require: false
+  gem 'rubocop-performance', require: false
+  gem 'rubocop-rails', require: false
+  gem 'slim_lint', require: false
+end