path2dir

#!/usr/bin/env bash
#
# Using a file containing paths as input, output directories..
#
# Written By: Derek Callaway [decal (AT) sdf {D0T} org]
# Last Modified: Mon Dec 18 22:52:07 PST 2017
# Tested On: Ubuntu 16.04.3 LTS
#

if [ ! "$1" ]
 then #
 echo "usage: $0 PATHFILE"
 echo ' PATHFILE location of file containing list of path names to parse directories from'

 exit 64
fi

(for s in `cat -- "$1"`
 do dirname $s
done) | sed -r 's![?]+.*$!!g' | sed -r 's![#].*$!!g' | sort -u

exit 0