This script takes one command line argument [directory]. It watches the directory for any changes and executes git commands on change.

onchange.sh

#!/bin/sh
# the script takes one command line argument which is the name of the directory to watch for changes
check() {
    dir="$1"
    chsum1=`find $dir -type f -mtime -5 -exec md5sum {} \;`
    chsum2=$chsum1
    changed=false
    pushed=false
    declare -i waited
    waited=0

    while [[ $chsum1 == $chsum2 || $chsum1 != $chsum2 ]]
    do
        if [[ $chsum1 == $chsum2 ]]
        then
            echo "directory hasn't changed"
            sleep 10
            if [[ $pushed == true ]]
            then
                changed=false
                pushed=false
            fi
            if [[ $changed == true ]]
            then
                waited=$waited+10
                echo "waited $waited seconds"
            fi
            if [ $waited -gt 50 ] && [ $changed == true ];
            then
                cd $dir
                echo "pushing changes to git"
                git status
                git add .
                git commit -m "directly modified files on live server"
                git push origin master
                echo "backing up database"
                cd /home/dh_mcbjqv/db_backup
                /home/dh_mcbjqv/db_backup/db_backup.sh
                changed=false
                pushed=true
                waited=0
                cd ..
            fi

            chsum2=`find $dir/ -type f -mtime -5 -exec md5sum {} \;`
        else
            echo "something has changed"
            changed=true
            sleep 10
            waited=0
            echo "waited $waited secconds"
            chsum1=`find $dir/ -type f -mtime -5 -exec md5sum {} \;`
            chsum2=$chsum1
        fi
    done
}
check $*