Is there a `ssh-add` Linux alpine one liner

Question

I need during a Gitlab-CI build to authenticate with ssh-agent from an alpine image.

I am looking for a sh one liner equivalent of this bash

Answer 1

You have to quote the variable in your first command:

echo "$SSH_PRIVATE_KEY" | ssh-add -
     ^----------------^

Or specify - as the filename in your second command:

printf '%s\n' "$SSH_PRIVATE_KEY" | ssh-add -
                                      -----^