Merge branch 'pdk-workaround-improvements' into 'master'

Handle Ruby 2.7 for PDK workarounds

See merge request puppet-infra/shared-ci-piplines!60

puppet-module-pipeline.yaml

@@ -26,14 +26,23 @@ pdk-validate:
 
       # For PDK 3.0.0
       if [ "$(pdk --version)" == "3.0.0" ]; then
+        pdk env 2>/dev/null > /tmp/pdk-env
+        source /tmp/pdk-env
+
         touch Gemfile Gemfile.local
 
         echo "Locking ffi to 1.15.5"
         sed -e '/"ffi"/d' -e "/'ffi'/d" -i Gemfile Gemfile.local
         echo 'gem "ffi", "= 1.15.5"' >> Gemfile.local
-        echo "Locking racc to 1.6.2"
-        sed -e '/"racc"/d' -e "/'racc'/d" -i Gemfile Gemfile.local
-        echo 'gem "racc", "= 1.6.2"' >> Gemfile.local
+        if [ "$PDK_RESOLVED_RUBY_VERSION" == "2.7.8" ]; then
+          echo "Locking racc to 1.4.16"
+          sed -e '/"racc"/d' -e "/'racc'/d" -i Gemfile Gemfile.local
+          echo 'gem "racc", "= 1.4.16"' >> Gemfile.local
+        else
+          echo "Locking racc to 1.6.2"
+          sed -e '/"racc"/d' -e "/'racc'/d" -i Gemfile Gemfile.local
+          echo 'gem "racc", "= 1.6.2"' >> Gemfile.local
+        fi
       fi
   script:
     - pdk validate --parallel --format=junit:validate.xml --format=text