setup.sh

#!/usr/bin/env bash

total_nameservers=$(grep -c 'nameserver' /etc/resolv.conf || :)
total_local_nameservers=$(grep -c 'nameserver 127' /etc/resolv.conf || :)
if [[ $total_local_nameservers -gt 0 && $total_nameservers -eq 1 ]]; then
    echo "Warning!"
    echo "It looks like you only have a loopback nameserver defined in /etc/resolv.conf"
    echo "DNS resolution inside Docker containers will fail."
    echo "You will need to set correct resolvers."
    echo "This is usually caused by NetworkManager using dnsmasq to handle"
    echo "setting up your resolvers."
    echo
    read -rp "Press any key to continue."
fi

cmd_list=(
  "virtualenv-2.7 virtualenv-2.5 virtualenv"
  "docker docker.io"
)

# Function to check if referenced command exists
cmd_exists() {
  if [ $# -eq 0 ]; then
    echo 'WARNING: No command argument was passed to verify exists'
  fi

  #cmds=($(echo "${1}"))
  cmds=($(printf '%s' "${1}"))
  fail_counter=0
  for cmd in "${cmds[@]}"; do
    command -v "${cmd}" >&/dev/null # portable 'which'
    rc=$?
    if [ "${rc}" != "0" ]; then
      fail_counter=$((fail_counter+1))
    fi
  done

  if [ "${fail_counter}" -ge "${#cmds[@]}" ]; then
    echo "Unable to find one of the required commands [${cmds[*]}] in your PATH"
    return 1
  fi
}

# Verify that referenced commands exist on the system
for cmd in "${cmd_list[@]}"; do
  cmd_exists "${cmd[@]}"
  # shellcheck disable=SC2181
  if [ $? -ne 0 ]; then
    return $?
  fi
done

# Test whether or not we can talk to the docker daemon
if [[ -z $ANSIBLE_SETUP_SKIP_DOCKER ]]; then
   docker ps > /dev/null
   rc=$?
   if [[ $rc -gt 0 ]]; then
       echo "One of the following cases may have happened:"
       echo "* You are missing docker."
       echo "* Your user is not part of the docker group."
       echo "* The docker daemon is not running."
       return $rc
   fi
fi

run() {
    if ! "$@"; then
      echo $?
      return $?
    fi
}

#echo " ------------------------------------------------------------------"
#echo "                                                                   "
#echo " You should be running this with "source ./setup.sh"               "
#echo " Running this directly like:                                       "
#echo " * ./setup.sh                                                      "
#echo " * bash ./setup.sh                                                 "
#echo " Will fail to set certain environment variables that may bite you. "
#echo "                                                                   "
#echo "                                                                   "
#echo " Waiting 5 seconds for you make sure you have ran this correctly   "
#echo " Cntrl-C to bail out...                                            "
#echo "                                                                   "
#echo " ------------------------------------------------------------------"
#
#for n in {5..1}; do
#  printf "\r%s " $n
#  sleep 1
#done
#echo -e "\n"

# Use existing Python VirtualENV if avilable
virtualenv_path='.venv'
if [ ! -d "${virtualenv_path}" ]; then
    echo "Failed to find a virtualenv, creating one."
    virtualenv --no-site-packages ${virtualenv_path}
else
    echo "Found existing virtualenv, using that instead."
fi

# shellcheck disable=SC1091
# shellcheck source=./venv/bin/activate
source ./.venv/bin/activate
# Upgrade pip iva pypa, need Pip 9.0.3 or greater that supports TLSv1.2
run curl https://bootstrap.pypa.io/get-pip.py | python
run pip install -U pip
run pip install -r requirements.txt --upgrade

echo " ----------------------------------------------------------------------------"
echo ""
echo " You are now within a python virtualenv at ${virtualenv_path} "
echo " This means that all python packages installed will not affect your system. "
echo " To return _back_ to system python, run deactivate in your shell. "
echo ""
echo " To test your changes run 'molecule test' in your shell. "
echo " ----------------------------------------------------------------------------"