v2 test

action.yml

@@ -19,17 +19,26 @@ inputs:
 outputs:
   value:
     description: "The environement variable's value"
-    value: ${{steps.worker.outputs.value}}
+    value: ${{steps.extract-value.outputs.value}}
 
 runs:
   using: composite
   steps:
-    - name: worker
+    - name: login
-      id: worker
+      if: inputs.username != ''
-      uses: addnab/docker-run-action@v3
+      uses: docker/login-action@v3
       with:
-        image: ${{inputs.image}}
+        registry: ${{ inputs.registry}}
-        registry: ${{inputs.registry}}
+        username: ${{ inputs.username }}
-        username: ${{inputs.username}}
+        password: ${{ inputs.password }}
-        password: ${{inputs.password}}
+    - name: Pull Docker image
-        run: echo "::set-output name=value::${${{inputs.name}}}"
+      shell: sh
+      run: docker pull ${{inputs.image}}
+    - name: Get variable value
+      id: extract-value
+      run: |
+        version=$(docker image inspect ${{inputs.image}} --format='{{range .Config.Env}}{{println .}}{{end}}' | grep ^${{inputs.name}}= | cut -d'=' -f2)
+        echo "${{inputs.name}}=$version"
+        echo "::set-output name=value::$version"
+      shell: bash
+