cd to nearest matching parent directory (stuff in a .bashrc or source it)

cdp.sh

function cdp() {
	# cd to the nearest matching parent directory
	# e.g. if PWD is /foo/bar/baz/alice/bob/eve, 'cdp baz' will cd to /foo/bar/baz/

	shopt -q nocaseglob
	nocaseglob=$?
	shopt -s nocaseglob 
	pat="^(.+)$1[^/]*"
	if [[ "$PWD" =~ $pat ]] ; then
		newdir=${BASH_REMATCH[0]}
		cd $newdir
		echo $newdir
	fi
	if (( $nocaseglob == 1 )) ; then shopt -u nocaseglob; fi
}