Script to make it easier to import books in different formats into Calibre using the "Add books > Add from folders and sub-folders" option.

calibre-prepare-add-multi-file.sh

#!/usr/bin/env bash

set -euo pipefail

# Handy script to make it easier to import books in different formats into Calibre using Add books > Add from folders and sub-folders.

function main {
  local -r folder="${1?Missing directory}"

  if [ ! -d "$folder" ]; then
    echo -e "\033[31m'$folder' is not a directory or does not exist\033[0m"
    exit 1
  fi

  cd "$folder"

  # List all unique names in the folder excluding hidden files and this script
  for filename in $(find . -maxdepth 1 -type f ! -name '.*' ! -name "$(basename "$0")" -exec basename {} \; | sed 's/\(.*\)\..*/\1/' | sort | uniq); do
    # Create a subfolder with the name of the file (no suffix)
    mkdir -p "$filename"
    # Move all files with that name (no suffix) inside the folder
    mv "$filename".* "$filename"/
    echo "'$filename' processed."
  done
}

main "$@"