shell - What does set -e and exec "$@" do for docker entrypoint scripts?

Question

I've noticed that many entrypoint.sh scripts for docker do something like this:

#!/bin/bash
set -e

... code ...

exec "$@"

What are the set -e and the exec "$@" for?

Answer 1

It basically takes any command line arguments passed to entrypoint.sh and execs them as a command. The intention is basically "Do everything in this .sh script, then in the same shell run the command the user passes in on the command line".

See:

• What are the special dollar sign shell variables?
• Need explanations for Linux bash builtin exec command behavior