#!/bin/sh
#
# prefixsubdirs.sh, Copyright © 2018 Matteo Cypriani
#
# This program is free software. It comes without any warranty, to
# the extent permitted by applicable law. You can redistribute it
# and/or modify it under the terms of the Do What The Fuck You Want
# To Public License, Version 2, as published by Sam Hocevar. See
# http://sam.zoy.org/wtfpl/COPYING for more details.
#
# For each directory provided on the command-line, this script prefixes its
# subdirectorie(s) with its name and a separator (" ; " by default).

set -e
#set -x

SEPARATOR=' ; '
MVOPTS='-v'

prefix_subdirs()
(
    dir="$1"
    cd "$dir"

    files="$(echo -- *)"
    [ "$files" = '*' ] && return 0

    for file in * ; do
        [ -d "$file" ] || continue
        mv $MVOPTS "$file" "${dir}${SEPARATOR}${file}"
    done
)

if [ $# -lt 1 ] ; then
    echo "Usage: $(basename "$0") DIRECTORY [DIRECTORY [...]]" >&2
    exit 1
fi

while [ -n "$1" ] ; do
    dir=$1
    shift

    if [ ! -d "$dir" ] ; then
        printf 'Warning! "%s" is not a directory: ignoring.\n' "$dir" >&2
        continue
    fi

    printf 'Entering "%s" ...\n' "$dir"
    prefix_subdirs "$dir"
done

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