watch diff files and cp

watchDiffAndCp.sh

#!/bin/bash

arquivoAlterando="~/dev/app.js";
arquivoAlterar="~/test/app.js";

while true ;do
    sIsDiff=$(diff -q ${arquivoAlterando} ${arquivoAlterar});

    if [[ $sIsDiff != "" ]] ;then
        isDiff=true;
    else
        isDiff=false;
    fi

    if $isDiff ;then
        cp ${arquivoAlterando} ${arquivoAlterar};
        echo "[$(date +%H:%M:%S)]" ${arquivoAlterando} "->" ${arquivoAlterar};
    fi
done