Run cookbook_publisher as a bundled gem if installed

templates/chef.yml

@@ -117,13 +117,18 @@ push-cookbook:
     refs:
       - master
       - main
+      - mattmi/fix-cookbook-publisher
     variables:
       - "$OPS_CLONE_USERNAME"
       - "$OPS_CLONE_PASSWORD"
-  script:
-    - rm -rf Gemfile Gemfile.lock || true
-    - git clone https://$OPS_CLONE_USERNAME:$OPS_CLONE_PASSWORD@ops.gitlab.net/gitlab-cookbooks/cookbook-publisher.git /tmp/cookbook-publisher
-    - cp /tmp/cookbook-publisher/publisher.rb /tmp/cookbook-publisher/Gemfile /tmp/cookbook-publisher/Gemfile.lock .
-    - if [[ "$(ruby -v | awk '{print $2}')" =~ ^2 ]]; then echo "Using cookbook-publisher lockfile" ; else rm Gemfile.lock ; fi
-    - bundle install
-    - bundle exec ruby publisher.rb
+  script: |
+    if grep 'cookbook_publisher' Gemfile
+      bundle && bundle exec cookbook_publisher
+    else
+      rm -rf Gemfile Gemfile.lock || true
+      git clone https://$OPS_CLONE_USERNAME:$OPS_CLONE_PASSWORD@ops.gitlab.net/gitlab-cookbooks/cookbook-publisher.git /tmp/cookbook-publisher
+      cp /tmp/cookbook-publisher/publisher.rb /tmp/cookbook-publisher/Gemfile /tmp/cookbook-publisher/Gemfile.lock .
+      if [[ "$(ruby -v | awk '{print $2}')" =~ ^2 ]]; then echo "Using cookbook-publisher lockfile" ; else rm Gemfile.lock ; fi
+      bundle install
+      bundle exec ruby publisher.rb
+    fi