[ISSUE #310] add github action for check license

.github/workflows/check-license.yml

@@ -0,0 +1,23 @@
+ This workflow will build a Java project with Maven
+# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven
+
+name: Java CI with Maven
+
+on:
+  # push:
+    # branches: [ '*' ]
+  pull_request:
+    branches: [ * ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Check License Header
+      uses: apache/skywalking-eyes@main      # always prefer to use a revision instead of `main`.
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}  # needed only when you want License-Eye to comment on the pull request.

.licenserc.yaml

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+#
+# Licensed to Apache Software Foundation (ASF) under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Apache Software Foundation (ASF) licenses this file to you 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: # `header` section is configurations for source codes license header.
+  license:
+    spdx-id: Apache-2.0 # the spdx id of the license, it's convenient when your license is standard SPDX license.
+    copyright-owner: Apache Software Foundation # the copyright owner to replace the [owner] in the `spdx-id` template.
+    content: | # `license` will be used as the content when `fix` command needs to insert a license header.
+      Licensed to Apache Software Foundation (ASF) under one or more contributor
+      license agreements. See the NOTICE file distributed with
+      this work for additional information regarding copyright
+      ownership. Apache Software Foundation (ASF) licenses this file to you 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.
+    # `pattern` is optional regexp if all the file headers are the same as `license` or the license of `spdx-id` and `copyright-owner`.
+    pattern: |
+      Licensed to the Apache Software Foundation under one or more contributor
+      license agreements. See the NOTICE file distributed with
+      this work for additional information regarding copyright
+      ownership. The Apache Software Foundation licenses this file to you 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.
+  paths: # `paths` are the path list that will be checked (and fixed) by license-eye, default is ['**'].
+    - '**'
+
+  paths-ignore: # `paths-ignore` are the path list that will be ignored by license-eye.
+    - 'dist'
+    - 'licenses'
+    - '**/*.md'
+    - 'LICENSE'
+    - 'NOTICE'
+
+  comment: on-failure # on what condition license-eye will comment on the pull request, `on-failure`, `always`, `never`.