INI parser in pure bash4+

ini.sh

#!/bin/bash

CONFIG=$1

#### Assign associative arrays from ini config file: key[section]=value
while IFS='\n' read line; do
  # Ignore comments and empty lines
  [[ ${line} =~ (^[[:space:]]*$|^[\;x\#]) ]] && continue

  # Are we a section heading?
  if [[ ${line} == \[*] ]]; then
    # add quotes witin the brackets
    line=${line/#\[/\[\'} line=${line/%\]/\'\]}

    section=${line}
  # Or are we a key=value pair?
  else
    IFS='= ' read var val <<< ${line}
    declare -A "${var}${section}=${val}"
  fi
done < ${CONFIG}

PS3="Please make a selection: " 
unset i; while [[ ! ${i} ]]; do
  select i in "${!host[@]}" "New connection"; do
    if [[ ${i} == "New connection" ]]; then
      read -r -p 'Please enter domain\user@host: ' connection
      RDP_DOMAIN=${1%%\\*}; RDP_HOST=${1##*@}
      RDP_USER=${1##*\\};
      [[ ${RDP_DOMAIN} == ${RDP_USER} ]] && unset RDP_DOMAIN
      RDP_USER=${RDP_USER%@*}
    else
      SECTION=${i}
    fi
    break
  done
  [[ -z ${i} ]] && echo -e "\n* Invalid selection! *\n"
done

echo '${domain["${SECTION}"]}' = ${domain["${SECTION}"]}
echo '${host["${SECTION}"]}' = ${host["${SECTION}"]}
echo '${user["${SECTION}"]}' = ${user["${SECTION}"]}