fix checking logic

Signed-off-by: Gergő Jedlicska <57442769+gjedlicska@users.noreply.github.com>

action.yml

@@ -33,26 +33,59 @@ runs:
   using: "composite"
   steps:
       - uses: actions/checkout@v3.5.3 # checkout the repository in which this GitHub Action is being used.
-      - name: Speckle Automate function version publisher
-        uses: specklesystems/speckle-automate-github-action@0.4.0
-        id: register_speckle_function_version
-        with:
-          speckle_automate_url: ${{ inputs.speckle_automate_url }}
-          speckle_token: ${{ inputs.speckle_token }}
-          speckle_function_id: ${{ inputs.speckle_function_id }}
-          speckle_function_input_schema_file_path: ${{ inputs.speckle_function_input_schema_file_path }}
-          speckle_function_command: ${{ inputs.speckle_function_command }}
+      - name: Set Version tag
+        shell: bash
+        run: |
+          echo "Determining Release tag value"
+
+          if [[ ${GITHUB_REF_TYPE} == "tag" ]]
+          then
+            echo "Workflow triggered by a git tag"
+            RELEASE_TAG=${GITHUB_REF_NAME}
+          else
+            echo "Workflow triggered on a git branch"
+            RELEASE_TAG=$(git rev-parse --short ${GITHUB_SHA})
+          fi
+
+          echo "Setting the function's releaseTag to: ${RELEASE_TAG}"
+          echo "releaseTag=${RELEASE_TAG}" >> "$GITHUB_ENV"
       - name: Log in to Speckle Automate Docker registry
         uses: docker/login-action@v2.2.0
         with:
           registry: ${{ inputs.speckle_automate_url }}
           username: ${{ inputs.speckle_token }}
           password: ${{ inputs.speckle_token }}
+      - name: Parse automate host
+        shell: bash
+        run: |
+          AUTOMATE_HOST=$(python -c 'from urllib.parse import urlparse; print(urlparse("${{ inputs.speckle_automate_url }}").netloc)')
+          echo "Parsed automate host: ${AUTOMATE_HOST}"
+          echo "automateHost=${AUTOMATE_HOST}" >>"$GITHUB_ENV"
+      - name: Ensure image doesn't exist in registry
+        shell: bash
+        run: |
+          set +e
+          docker manifest inspect ${{ env.automateHost }}/${{ inputs.speckle_function_id }}:${{ env.releaseTag }}
+          if [[ $? == 0 ]]
+          then
+            echo "Cannot override the existing release tag ${{ env.releaseTag }}. Please publish a new release!"
+            exit 1
+          fi
       - name: Build and push Docker image
         uses: docker/build-push-action@v4.1.1
         with:
           context: ${{ inputs.docker_context }}
           file: ${{ inputs.dockerfile_path }}
-          tags: ${{ steps.register_speckle_function_version.outputs.speckle_automate_host }}/${{ inputs.speckle_function_id }}:${{ steps.register-speckle-function-version.outputs.version_id }}
+          tags: ${{ env.automateHost }}/${{ inputs.speckle_function_id }}:${{ env.releaseTag }}
           target: ''
           push: true
+      - name: Speckle Automate function version publisher
+        uses: specklesystems/speckle-automate-github-action@0.6.1
+        id: register_speckle_function_version
+        with:
+          speckle_automate_url: ${{ inputs.speckle_automate_url }}
+          speckle_token: ${{ inputs.speckle_token }}
+          speckle_function_id: ${{ inputs.speckle_function_id }}
+          speckle_function_input_schema_file_path: ${{ inputs.speckle_function_input_schema_file_path }}
+          speckle_function_release_tag: ${{ env.releaseTag }}
+          speckle_function_command: ${{ inputs.speckle_function_command }}