BRPC/tools/add_syntax_equal_proto2_to_all.sh

#!/usr/bin/env bash

# Licensed to the Apache Software Foundation (ASF) under one or more
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# 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
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#
#    http://www.apache.org/licenses/LICENSE-2.0
#
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# Add 'syntax="proto2";' to the beginning of all proto files under 
# PWD(recursively) if the proto file does not have it.
for file in $(find . -name "*.proto"); do
    if grep -q 'syntax\s*=\s*"proto2";' $file; then
        echo "[already had] $file";
    else 
        sed -i '1s/^/syntax="proto2";\n/' $file
        echo "[replaced] $file"
    fi
done