#!/bin/bash
# Copyright (C) 2016 Ian Kelling

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

#     http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

rmln () {
    local help="Usage: rmln [RM_OPTION]... FILE...
wrap rm, expanding symlink arguments

Symlink arguments are recursively expanded so the links and the targets
are removed.  All arguments to rm work.

rm's --help:
"
    local file targets

    # simple but correct counting past gnu rm options
    local -i index=1
    local options=true
    local helped=false # only print our help once
    while $options; do
        if [[ "${@:index:1}" == -* ]]; then
            if [[ "${@:index:1}" == --help ]] && ! $helped; then
                echo "$help"
                helped=true
            fi
            if [[ "${@:index:1}" == -- ]]; then
                options=false
            fi
            index+=1
        else
            options=false
        fi
    done

    for file in "${@:index}"; do
        [[ -L "$file" ]] && _rmln_recurse "$file"
    done
    rm "$@" "${targets[@]}"
}

_rmln_recurse() {
    local x="$( readlink "$1" )"
    targets+=( "$x" )
    [[ -L $x ]] && _rmln_recurse "$x"
}
rmln "$@"