__exec_command was using ${arg:-} which only captured the first element
of the args array, then ran it through "$shell" $pre_exec "$cmdExec"
which effectively discarded everything after $1.
Running `docker run image sh -c 'go build ...'` would:
1. Set arg=("sh" "-c" "go build ...")
2. Set cmdExec="sh" (only first element)
3. Run bash --login -c "sh" (dropping -c and the actual command)
This broke any Makefile GO_DOCKER pattern that relied on passing multi-arg
commands. Simplified to just `exec "$@"` which passes all args through.
- rootfs/usr/local/etc/docker/functions/entrypoint.sh: rewrite __exec_command
rootfs/usr/local/etc/docker/functions/entrypoint.sh
__setup_mta calls __find_replace on /etc/ssmtp/revaliases which returns
1 when the symlink it creates is broken. With set -o pipefail active the
non-zero return kills the entire entrypoint before any command can run.
ssmtp is not installed in this image and email delivery is not a feature
of this image, so the MTA setup failure is irrelevant. Guard the call
with || true so initialization continues regardless.
- rootfs/usr/local/bin/entrypoint.sh: __setup_mta || true (non-fatal)
rootfs/usr/local/bin/entrypoint.sh
casjay
