| #!/bin/bash | |
| set -e | |
| if [ -z "$1" ]; then | |
| source_list=/dev/stdin | |
| dest_list=/dev/stdout | |
| else | |
| source_list="$1" | |
| dest_list="$1" | |
| fi | |
| # Load the file | |
| readarray A < "$source_list" | |
| # Sort | |
| IFS=$'\n' | |
| # Stash away comments | |
| C=( $(grep -E '^#' <<< "${A[*]}") ) | |
| A=( $(grep -v -E '^#' <<< "${A[*]}") ) | |
| # Sort entries | |
| A=( $(LC_COLLATE=C sort -f <<< "${A[*]}") ) | |
| A=( $(uniq <<< "${A[*]}") ) | |
| # Concatenate comments and entries | |
| A=( ${C[*]} ${A[*]} ) | |
| unset IFS | |
| # Dump array back into the file | |
| printf '%s\n' "${A[@]}" > "$dest_list" |