check if each protobuf definition file contains only one definition and its name is same on file name.

protobuf-msg-def-checker.sh

#!/bin/bash
find src/ -type f -name *.proto |
    while read filePath; do
        # do something with the file
        fileName=`basename ${filePath}`
        echo -n "### checking ${fileName}: "
        msgs=""
        enuns=""
        foundDefs=`grep "message\s\+[a-zA-Z0-9\-\_]\+.*" ${filePath} | sed "s/\s*message\s\+\([a-zA-Z0-9\-\_]\+\).*/\1/"`
        if [ -n "${foundDefs}" ]; then
            msgs=${foundDefs}
            # echo -e "\t${foundDefs}"
        fi
        foundDefs=`grep "enum\s\+[a-zA-Z0-9\-\_]\+.*" ${filePath} | sed "s/\s*enum\s\+\([a-zA-Z0-9\-\_]\+\).*/\1/"`
        if [ -n "${foundDefs}" ]; then
            enuns=${foundDefs}
            # echo -e "\t${foundDefs}"
        fi
        # if [ -z "${msgs}" ] && [ -z ${enuns} ]; then
        if [ -n "${msgs}" ]; then
            if [ -n "${enuns}" ]; then
                defType="mixed"
            else
                defType="msg"
                defName=${msgs}
            fi
        else
            if [ -n "${enuns}" ]; then
                defType="enum"
                defName=${enuns}
            else
                defType="empty"
            fi
        fi
        errorFound=""
        if [ ${defType} == "empty" ]; then
            errorFound="${errorFound},empty"
        fi
        if [ ${defType} == "mixed" ]; then
            errorFound="${errorFound},mixed"
        fi
        if [ "${defName}.proto" != "${fileName}" ]; then
            errorFound="${errorFound},name unmatched"
        fi
        if [ -z "${errorFound}" ]; then
            echo "OKAY"
        else
            echo "ERROR => ${errorFound}"
        fi
    done