Docker cp requires two arguments

docker cp

It would seem on some versions of Docker, docker cp does not support parameter expansion...

For example

WORKS Docker version 19.03.4-ce, build 9013bf583a

CTR_ID=$(docker ps -q -f name=containername)docker cp patches $CTR_ID:/home/build

FAILS Docker version 19.03.4-ce, build 9013bf583a

BUILDHOME=/home/builddocker cp patches containeridliteral:$BUILDHOME

In your case, maybe the pwd is not expanding properly.

CodeHunter