Added parsing of options

music-sync.sh

@@ -0,0 +1,81 @@
+#!/bin/bash
+
+# saner programming env: these switches turn some bugs into errors
+set -o errexit -o pipefail -o noclobber -o nounset
+source="-"
+dest="-"
+verbose=true
+help=false
+
+GetOptions() {
+
+	# https://stackoverflow.com/a/29754866
+	! getopt --test > /dev/null 
+	if [[ ${PIPESTATUS[0]} -ne 4 ]]; then
+		VerboseOutput "Fatal" "\`getopt --test\` failed"
+		echo "Sorry, It seems that your shell is not supported"
+		echo "If you're using mac or another unix-like system, please install GNU getopt"
+		exit 1
+	fi
+
+	OPTIONS=s:d:vh
+	LONGOPTS=source:,dest:,verbose,help
+
+	# -use ! and PIPESTATUS to get exit code with errexit set
+	# -temporarily store output to be able to check for errors
+	# -activate quoting/enhanced mode (e.g. by writing out “--options”)
+	# -pass arguments only via   -- "$@"   to separate them correctly
+	! PARSED=$(getopt --options=$OPTIONS --longoptions=$LONGOPTS --name "$0" -- "$@")
+	if [[ ${PIPESTATUS[0]} -ne 0 ]]; then
+		# e.g. return value is 1
+		#  then getopt has complained about wrong arguments to stdout
+		help=true
+		Usage
+		exit 2
+	fi
+
+	# read getopt’s output this way to handle the quoting right:
+	eval set -- "$PARSED"
+
+	verbose=false
+	# now enjoy the options in order and nicely split until we see --
+	while true; do
+		case "$1" in
+			-v|--verbose)
+				verbose=true
+				shift
+				;;
+			-h|--help)
+				help=true
+				echo "test"
+				shift
+				;;
+			-s|--source)
+				source="$2"
+				shift 2
+				;;
+			-d|--dest)
+				dest="$2"
+				shift 2
+				;;
+			--)
+				shift
+				break
+				;;
+			*)
+				echo "Programming error"
+				return 3
+				;;
+		esac
+	done
+
+}
+
+
+VerboseOutput() {
+	if [[ $verbose ]]; then
+		echo "[$1] $2" >&2
+	fi
+}
+
+GetOptions $@