CI: test workflows

.github/workflows/test-e2e.yml

@@ -41,3 +41,28 @@ jobs:
         with:
           dockerfile: "test/**/Dockerfile-glob-*"
           annotate: false
+  gh-action-mutltiple-invoke:
+    name: Action supports multiple invocations in a job
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+      # Download and run default version
+      - uses: ./
+        with:
+          dockerfile: test/fixtures/Dockerfile-valid
+      # Download and run custom version
+      - uses: ./
+        with:
+          dockerfile: test/fixtures/Dockerfile-valid
+          version: 2.9.0
+      - run: chmod -x ${{ github.workspace }}/bin/hadolint
+      # Download and run custom version
+      - uses: ./
+        with:
+          dockerfile: test/fixtures/Dockerfile-valid
+          version: 2.9.0
+      # Run custom version
+      - uses: ./
+        with:
+          dockerfile: test/fixtures/Dockerfile-valid
+          version: 2.9.0

action.yml

@@ -46,11 +46,35 @@ runs:
     - name: Download hadolint and make it available in path
       shell: bash
       run: |
-        echo "::debug::Downloading Hadolint ${{ inputs.version }}"
-        mkdir ${{ github.action_path }}/bin
-        curl -L -s -o ${{ github.action_path }}/bin/hadolint \
-          "https://github.com/hadolint/hadolint/releases/download/v${{ inputs.version }}/hadolint-Linux-x86_64"
-        chmod +x ${{ github.action_path }}/bin/hadolint
+        download_hadolint=false
+        # Check if hadolint exists
+        if [ ! -x "${{ github.action_path }}/bin/hadolint" ]; then
+          echo "::debug::Hadolint binary not found"
+          download_hadolint=true
+        else
+          echo "::debug::Hadolint binary exists"
+          version=$(${{ github.action_path }}/bin/hadolint --version 2>&1)
+          # Check if hadolint version can be retrieved
+          if [ $? -ne 0 ]; then
+            echo "::debug::Hadolint version cannot be retrieved"
+            download_hadolint=true
+          else
+            # Extract version number
+            version=$(echo "$version" | awk '{print $NF}')
+            if [ "$version" != "${{ inputs.version }}" ]; then
+              echo "::debug::Hadolint version does not match input version ($version != ${{ inputs.version }})"
+              download_hadolint=true
+            fi
+          fi
+        fi
+        # Download hadolint if necessary
+        if [ "$download_hadolint" = true ]; then
+          echo "::debug::Downloading Hadolint ${{ inputs.version }}"
+          mkdir -p ${{ github.action_path }}/bin
+          curl -L -s -o ${{ github.action_path }}/bin/hadolint \
+            "https://github.com/hadolint/hadolint/releases/download/v${{ inputs.version }}/hadolint-Linux-x86_64"
+          chmod +x ${{ github.action_path }}/bin/hadolint
+        fi
         echo "${{ github.action_path }}/bin" >> "${GITHUB_PATH}"
     - name: Invoke hadolint.sh
       id: run