Add license header checker (#879)

Signed-off-by: kwanhur <huang_hua2012@163.com>

.github/workflows/ci.yml

@@ -48,6 +48,10 @@ jobs:
     - run: git checkout HEAD^2
       if: ${{ github.event_name == 'pull_request' }}
 
+    # Check license header
+    - name: Check License Header
+      uses: apache/skywalking-eyes@main
+
     # Build
     - name: Build
       shell: bash

.licenserc.yaml

@@ -0,0 +1,40 @@
+# Copyright (c) 2021 The BFE Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+header:
+  license:
+    spdx-id: Apache-2.0
+    copyright-owner: The BFE Authors
+
+  paths-ignore:
+    - 'conf'
+    - 'docs/material'
+    - 'docs/images'
+    - '**/go.mod'
+    - '**/go.sum'
+    - '**/*.md'
+    - '**/testdata/*'
+    - '**/test_data/*/**'
+    - '**/*/testdata/*/**'
+    - 'LICENSE'
+    - 'NOTICE'
+    - 'VERSION'
+    - 'staticcheck.conf'
+    - 'bfe_basic/condition/parser/y.go'
+
+  comment: on-failure
+
+dependency:
+  files:
+    - go.mod