LDIF to YAML with some basic Base64 handling

ldif2yaml

#!/bin/bash

set -o pipefail

ldif_attr_re='^([^ :]+)(::?) (.+)$'
ldif_continue_re='^ (.+)$'
printable_re="^[[:print:]]+$"
yaml_attr_fmt='%s %s: "%s"\n'

declare -A RECORD
declare -A TYPE

function parse_ldif {
  while IFS='' read line; do
    # Skip LDIF comments
    test "${line:0:1}" == "#" && continue;

    if [[ -z $line ]]; then
      first=true
      for i in ${!RECORD[@]}; do
        data=${RECORD[$i]}
        type=${TYPE[$i]}

        if [[ $type = '::' ]]; then
          data=$(base64 -d <<<"$data" || true)
        fi

        if [[ -n $data ]]; then
          if ! [[ $data =~ $printable_re ]]; then
            data=$(base64 -w0 <<<"$data")
          fi
          
          data=${data//\"/\\\"}
          data=${data//\\/\\\\}
          indent=' '
          if [[ $first = true ]]; then
            indent='-'
            first=false
          fi
          printf "$yaml_attr_fmt"  "$indent" "$i" "$data"
        fi
      done
      RECORD=()
      TYPE=()
    else
      if [[ $line =~ $ldif_attr_re ]]; then
        attr=${BASH_REMATCH[1]}

        RECORD[$attr]=${BASH_REMATCH[3]}
        TYPE[$attr]=${BASH_REMATCH[2]}
      elif [[ $line =~ $ldif_continue_re ]]; then
        RECORD[$attr]="${RECORD[$attr]}${BASH_REMATCH[1]}"
      fi
    fi
  done
}

parse_ldif