Add script to check license headers

.gitignore

@@ -2,3 +2,4 @@
 *.iml
 .DS_Store
 *~
+**/*_pb2*
\ No newline at end of file

Makefile

+# Licensed to the 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.  The 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.
+
+.PHONY: license
+
+setup:
+	python3 -m pip install --upgrade pip
+	python3 -m pip install grpcio --ignore-installed
+	python3 -m pip install grpcio-tools
+
+gen:
+	python3 -m grpc_tools.protoc -I protocol --python_out=. --grpc_python_out=. protocol/**/*.proto
+
+license:
+	python3 tools/check-license-header.py skywalking tests tools
+
+clean:
+	rm -rf browser
+	rm -rf common
+	rm -rf language_agent
+	rm -rf management
+	rm -rf profile
+	rm -rf service_mesh_probe

skywalking/client/http/__init__.py

+#
+# Licensed to the 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.
+# The 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.
+#

skywalking/utils/__init__.py

+#
+# Licensed to the 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.
+# The 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.
+#

tests/__init__.py

+#
+# Licensed to the 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.
+# The 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.
+#

tools/check-license-header.py

+#
+# Licensed to the 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.
+# The 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.
+#
+
+import os
+import sys
+
+ignored_chars = '#\n \t'
+
+license_header = ' '.join(
+    [
+        line.strip(ignored_chars) for line in """
+        #
+        # Licensed to the 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.
+        # The 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.
+        #
+        """.splitlines()
+    ]
+).strip(ignored_chars)
+
+
+def walk_through_dir(d) -> bool:
+    checked = True
+    for root, sub_dirs, files in os.walk(d):
+        for filename in files:
+            file_path = os.path.join(root, filename)
+
+            with open(file_path, 'r') as f:
+                header = ' '.join([line.strip(ignored_chars) for line in f.readlines() if line.startswith('#')]).strip()
+                print('%s license header in file: %s' % ('✅' if header == license_header else '❌', file_path))
+                checked &= header == license_header
+    return checked
+
+
+if __name__ == "__main__":
+    checked = True
+    for _, directory in enumerate(sys.argv):
+        checked &= walk_through_dir(directory)
+    if not checked:
+        sys.exit(1)