gen_random_filename.bash

# Bash function gen_random_filename
# Description: Generates random two-word names with date appended
# Requires a dictionary file, easily generated with `aspell dump master > dictionary.txt`
# or grab it from https://gist.githubusercontent.com/ttscoff/55493fe89c35ec1588ba/raw/
# Requires shuf and aspell
#
# Example results:
# reissue_degraded-2015-03-12@0254
# Cascades_derivatives-2015-03-12@0255
# oxygens_soaked-2015-03-12@0256
# leaderships_neutralized-2015-03-12@0306

DICT_FILE=dictionary.txt
DATE_APPEND=${1-yes}


check_pkgs(){
	if [[ ! $(which shuf) ]] && [[ ! $(which aspell) ]] ; then
		cat <<-EOS
		$FUNCNAME requires the utilities:
         aspell          :to generate random names
         shuf (or gshuf) :to shuffle words

        ... please install them first.
         pkg_name: coreutils, aspell

		EOS
	fi
}

populate_dict(){
	if [ ! -f $DICT_FILE ]; then
		echo 'generating dictionary file to shuffle'
		aspell dump master > dictionary.txt
	fi
}

gen_random_name() {
	local randwords
	local title

	randwords=`shuf -n 2 $DICT_FILE|sed 's/[^a-zA-Z]//g'`
	title=`echo $randwords|tr ' ' '_'`

	if [ "$DATE_APPEND" = yes ]; then
		echo $title-$(date +'%F@%I%M')
	else
		echo $title
	fi
}

check_pkgs
populate_dict
gen_random_name