Open MacOS Application from command line based on pattern

open_mac_app.sh

# open matching application on MacOS based on part of the pattern
# case insensitive
# errors out if there is less than or more than a single match
# app is forwarded all parameters after pattern
# example usage: a gimp pic.jpeg
function a() {
	local app="$1"

	# if no dir is specified, then it is the current dir.
	if [ -z "$app" ]; then
		echo "You have to specify a part of an app name to start it."
		return 1
	fi

	# length=`echo $matches | wc -l`
	local length=`ls /Applications | grep -i -c "$app"`
	if [[ $length -eq 0 ]]; then
		echo "No matching apps."
		return 1
	fi
	if [[ $length -gt 1 ]]; then
		local matches=`ls /Applications | grep -i "$app"`
		echo "More than 1 matching apps."
		echo $matches
		return 1
	fi
	if [[ $length -eq 1 ]]; then
		local match=`ls /Applications | grep -i "$app"`
		match=`echo "$match" | sed -e "s/\/$//"`
		# remove @ of linked files
		if [[ "$match" == *"@" ]]; then
			match=${match%"@"}
		fi
		open -a "$match" "${@:2}"
		return 0
	fi
	echo "other"
}