$ cd var/lib/mysql && mysqldump -uroot -p"craft" --add-drop-table craft > ~/../docker-entrypoint-initdb.d/base.sql && cd ~/..

mysqldump -uroot -p"craft" --add-drop-table craft
    > ~/../docker-entrypoint-initdb.d/base.sql

cd "$workdir" && somecommand ; cd "$OLDPWD"

if cd "$workdir" ; then somecommand ; cd "$OLDPWD" ; fi

( cd "$workdir" && somecommand )