trainline.sh

#!/bin/sh

# A wrapper script for invoking a docker container
# Based on https://spin.atomicobject.com/2015/11/30/command-line-tools-docker/

DOCKER_IMAGE="thibdct/trainline"

error(){
  error_code=$1
  echo "ERROR: $2" >&2
  exit $1
}
check_cmd_in_path(){
  cmd=$1
  which $cmd > /dev/null 2>&1 || error 1 "$cmd not found!"
}
upgrade(){
  docker pull $DOCKER_IMAGE
  exit 1
}
uninstall(){
  read -p "Are you sure to uninstall (y/n)? " -n 1 -r
  echo
  if [[ $REPLY =~ ^[Yy]$ ]]
  then
    docker rmi $DOCKER_IMAGE
    rm $0
  fi
  exit 1
}

# Checks for dependencies
check_cmd_in_path docker

case $1 in
    --uninstall)
    uninstall
    ;;
    --upgrade)
    upgrade
    ;;
esac

# Run our containerized command
exec docker run -it --rm $DOCKER_IMAGE "$@"