#!/bin/bash

set -e

# Ensure $HOME exists when starting
if [ ! -d "${HOME}" ]; then
  mkdir -p "${HOME}"
fi

# Setup $PS1 for a consistent and reasonable prompt
if [ -w "${HOME}" ] && [ ! -f "${HOME}"/.bashrc ]; then
  echo "PS1='\s-\v \w \$ '" > "${HOME}"/.bashrc
  echo -e 'if [ -f /etc/bashrc ]; then\n  . /etc/bashrc\nfi' >> "${HOME}"/.bashrc
fi

# Add current (arbitrary) user to /etc/passwd and /etc/group
if ! whoami &> /dev/null; then
  if [ -w /etc/passwd ]; then
    echo "${USER_NAME:-user}:x:$(id -u):0:${USER_NAME:-user} user:${HOME}:/bin/bash" >> /etc/passwd
    echo "${USER_NAME:-user}:x:$(id -u):" >> /etc/group
  fi
fi

exec "$@"