Docker bash script wait for container log to contain "done"

Question

I'm looking to write a bash script that will not progress until the log of a container states "[services.d] done."

Example:

#!/bin/bash

while [ docker logs container | grep "[services.d] done." ] = "false";
do
    sleep 1
    echo "working..."
done

Answer 1

Grep will return false if it will not find the string, so try just:

#!/bin/bash

while ! docker logs container | grep -q "[services.d] done.";
do
    sleep 1
    echo "working..."
done