Workaround for actions/runner#665

.github/actions/test-plugin-installation/action.yml

@@ -37,13 +37,20 @@ runs:
       shell: bash
       run: |
         cp target/${{ inputs.aem-rules-binary }} .github/actions/test-plugin-installation/${{ inputs.aem-rules-binary }}
-      # The following uses implicit env variables created for inputs
+      # Normally, this would use implicit env variables created for inputs
       # see https://docs.github.com/en/actions/creating-actions/metadata-syntax-for-github-actions#example-specifying-inputs
-      # and https://www.gnu.org/software/bash/manual/html_node/Shell-Parameter-Expansion.html to lowercase the file name
-      # so that it's valid to use in a Docker container name
+      # these don't, however, appear to work in composite actions https://github.com/actions/runner/issues/665
     - name: Build image
       shell: bash
+      env:
+        INPUTS_SONARQUBE_BASE_IMAGE: ${{ inputs.sonarqube-base-image }}
+        INPUTS_AEM_RULES_BINARY: ${{ inputs.aem-rules-binary }}
+      # Use https://www.gnu.org/software/bash/manual/html_node/Shell-Parameter-Expansion.html to lowercase the file name
+      # so that it's valid to use in a Docker container name
       run: docker build . -t ${INPUTS_SONARQUBE_BASE_IMAGE,,}-${INPUTS_AEM_RULES_BINARY,,}
     - name: Test image
       shell: bash
+      env:
+        INPUTS_SONARQUBE_BASE_IMAGE: ${{ inputs.sonarqube-base-image }}
+        INPUTS_AEM_RULES_BINARY: ${{ inputs.aem-rules-binary }}
       run: ./run-tests.sh ${INPUTS_SONARQUBE_BASE_IMAGE,,}-${INPUTS_AEM_RULES_BINARY,,}