convert between NFC and NFD Unicode normalization (e.g. for Korean)

nfc

#!/usr/bin/env bash

die() {
	echo "$*" 1>&2; exit 1;
}

print_usage() {
	echo "usage: $my_name <FILE> | $my_name <DIRECTORY>"
}

my_name=$(basename "$0")
file_arg="$*"

if [ "$file_arg" = "" ];
then
	print_usage
	exit 0
fi

if [ "$my_name" = "nfc" ];
then
	convmv_args=(--nfc --notest -f utf8 -t utf8)
elif [ "$my_name" = "nfd" ];
then
	convmv_args=(--nfd --notest -f utf8 -t utf8)
else
	die "error: please rename $0 into nfc or nfd."
fi

if [ -f "$file_arg" ];
then
	convmv    "${convmv_args[@]}" "$file_arg"
elif [ -d "$file_arg" ];
then
	convmv -r "${convmv_args[@]}" "$file_arg"
else
	print_usage
	die "error: invalid argument!"
fi