GHA: Unify License Compliance Workflow

.github/workflows/compliance.yml

@@ -1,21 +1,31 @@
 name: Compliance
+
 on:
   push:
-    branches:
-      - main
-      - 'support/*'
+    branches: [ main ]
   pull_request: {}
 
+permissions:
+  # https://docs.github.com/en/rest/overview/permissions-required-for-github-apps?apiVersion=2022-11-28#repository-permissions-for-contents
+  contents: read
+
 jobs:
-  licenses:
+  compliance:
     runs-on: ubuntu-latest
     steps:
-      - run: sudo apt install -y moreutils
+    - uses: actions/checkout@v5
+    - uses: actions/setup-go@v6
+      with:
+        go-version: stable
 
-      - uses: actions/setup-go@v6
-        with:
-          go-version: 1.x
+    - name: Download modules to local cache
+      run: go mod download
 
-      - uses: actions/checkout@v5
+    - name: Install go-licenses
+      run: go install github.com/google/go-licenses@latest
 
-      - run: .github/workflows/compliance/check-licenses.sh
+    - name: Check licenses against allow list
+      run: |
+        # Pass allowed licenses as SPDX Identifiers: https://spdx.org/licenses/
+        go-licenses check github.com/icinga/icingadb/... \
+          --allowed_licenses BSD-2-Clause,BSD-3-Clause,GPL-2.0,ISC,MIT,MPL-2.0,Unlicense