Docker wrapper script to deploy CLI applications

docker-wrapper.sh

#!/bin/sh

# docker-wrapper script.
# A wrapper script for invoking cli tools with docker.
#
# For example we'll use it for Bash Automated Testing System.
# Put this script in $PATH as `bats`.

PROGNAME="$(basename $0)"
IMAGE="bats/bats"
VERSION="latest"
WORKDIR="/app"

# Helper functions for guards
error(){
  error_code=$1
  echo "ERROR: $2" >&2
  echo "($PROGNAME wrapper version: $VERSION, error code: $error_code )" &>2
  exit $1
}

check_cmd_in_path(){
  cmd=$1
  which $cmd > /dev/null 2>&1 || error 1 "$cmd not found!"
}

# Guards (checks for dependencies)
check_cmd_in_path docker

# Set up mounted volumes, environment, and run our containerized command
exec docker run \
  --interactive --tty --rm \
  --volume "$(pwd)":"${WORKDIR}" \
  --workdir "${WORKDIR}" \
  "${IMAGE}:${VERSION}" "$@"