dmenu-path

#!/bin/bash
#
# dmenu-path: Make dmenu's cache file conform to XDG base spec.
#
# 2010 Tom Vincent <http://www.tlvince.com/>
#
# This file was originally part of the dmenu package as "dmenu_path", whose
# license follows:
#
# MIT/X Consortium License
#
# © 2006-2008 Anselm R. Garbe <garbeam at gmail dot com>
# © 2006-2008 Sander van Dijk <a dot h dot vandijk at gmail dot com>
# © 2006-2007 Michał Janeczek <janeczek at gmail dot com>
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.

CACHE="${XDG_CACHE_HOME:-"$HOME/.cache"}"
test -d "$CACHE/dmenu" || mkdir -p "$CACHE/dmenu"
CACHE+="/dmenu/dmenu-cache"

IFS=:

uptodate() {
    test -f "$CACHE" &&
    for dir in $PATH
    do
        test ! $dir -nt "$CACHE" || return 1
    done
}

if ! uptodate
then
    for dir in $PATH
    do
        cd "$dir" &&
        for file in *
        do
            test -x "$file" && echo "$file"
        done
    done | sort | uniq > "$CACHE".$$ &&
    mv "$CACHE".$$ "$CACHE"
fi

cat "$CACHE"