ci: add license check for python (#12)

.github/.license_check.ini

@@ -0,0 +1,29 @@
+# Authorized and unauthorized licenses in LOWER CASE
+[Licenses]
+authorized_licenses:
+        3-clause bsd
+        apache
+        apache 2.0
+        apache software
+        apache software license
+        apache-2.0
+        bsd
+        bsd license
+        GNU Lesser General Public License v2 or later (LGPLv2+)
+        gnu lgpl
+        isc license
+        isc license (iscl)
+        lgpl with exceptions or zpl
+        mit
+        mit license
+        mozilla public license 2.0 (mpl 2.0)
+        MPL-2.0
+        new bsd
+        new bsd license
+        python software foundation
+        python software foundation license
+        simplified bsd
+        zpl 2.1
+
+unauthorized_licenses:
+        gpl v3

.github/workflows/pylicense.yaml

@@ -0,0 +1,24 @@
+name: Python License Check
+
+on:
+  pull_request:
+    paths:
+    - 'common/python/**'
+    - 'vmsdk/python/**'
+  workflow_dispatch:
+
+jobs:
+  python-license-scan:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+      - name: License Check
+        run: |
+          set -ex
+          source setupenv.sh
+          python3 -m pip install liccheck
+          for f in $(find -type f -name "requirements.txt"); do
+            python3 -m pip install -r $f
+            liccheck -s .github/.license_check.ini -r $f
+          done