Add license headers check in go files

workflow-templates/assets/check-go-task/Taskfile.yml

@@ -37,3 +37,10 @@ tasks:
     dir: "{{default .DEFAULT_GO_MODULE_PATH .GO_MODULE_PATH}}"
     cmds:
       - go vet {{default .DEFAULT_GO_PACKAGES .GO_PACKAGES}}
+
+  # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-go-task/Taskfile.yml
+  go:check-license-headers:
+    desc: Check go license headers
+    cmds:
+      - go install github.com/google/addlicense@v1.1.1
+      - addlicense -c "ARDUINO SA (http://www.arduino.cc/)" -f ./license_header.tpl *.go

workflow-templates/check-go-task.yml

@@ -226,3 +226,38 @@ jobs:
 
       - name: Check whether any tidying was needed
         run: git diff --color --exit-code
+
+  check-license-headers:
+    name: check-license-headers (${{ matrix.module.path }})
+    needs: run-determination
+    if: needs.run-determination.outputs.result == 'true'
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+
+      matrix:
+        module:
+          - path: ./
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Install Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      - name: Install Task
+        uses: arduino/setup-task@v1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          version: 3.x
+
+      - name: Check license headers
+        env:
+          GO_MODULE_PATH: ${{ matrix.module.path }}
+        run: |
+          task go:check-license-headers
+          git diff --color --exit-code