#!/bin/sh
#
# Run single command from Procfile
#
# This script is a basic replacement for foreman when running on Docker. When
# starting the docker instance, specify as command `script/start <type>`.
# `type` is looked up in `Procfile` and the command is started. This allows e.g.
# docker-compose to run multiple process/dyno types from a single image, without
# needing to know the exact command (which may change over time).
#
if [ ! "$1" ]; then
  echo "Usage: $0 <process type>" 1>&2
  echo
  echo "Note that some process types need the PORT environment variable."
  exit 1
fi

CMD=`cat Procfile | grep "^$1:" | cut -d: -f2-`
if [ ! "$CMD" ]; then
  echo "Process type $1 not found in Procfile" 1>&2
  exit 1
fi

exec /bin/sh -c "$CMD"