Make hardlinks out of a list of duplicate files generated by rdfind

dedup.sh

#!/usr/bin/env bash

help() {
  echo "Makes hardlinks out of a list of duplicates files generated by rdfind."
  echo
  echo "usage: $0 <duplicates_file>"
}

main() {
  local duplicates_file=$1

  if [ $# -lt 1 ]; then
    help
    exit 1
  fi

  while read -r line; do
    # If line is blank, stop the current and start a new one
    if [ "$line" = "" ]; then
      origin=""
    elif [ "$origin" = "" ]; then
      echo "Origin: $line"
      origin="$line"
    else
      rm "$line"
      ln "$origin" "$line"
      echo "  Linked to: $line"
    fi
  done <"$duplicates_file"
}

main "$@"