bashsubimp.shlib

###################
# bashimp.shlib v0.2.0
#
# @author RuneImp <runeimp@gmail.com>
# @licenses http://opensource.org/licenses/MIT
#
#####
# ChangeLog:
# ----------
# 2016-04-30  0.2.0      Updated app references
# 2016-04-29  0.1.0      Initial script creation
#
#

[[ "x$APP_NAME_CLI" = "x" ]]			&& echo "APP_NAME_CLI is undefined" 1>&2
[[ "x$APP_NAME_APP" = "x" ]]			&& echo "APP_NAME_APP is undefined" 1>&2
[[ "x$CMD_PREFIX" = "x" ]]				&& CMD_PREFIX="${APP_NAME_CLI}-"
[[ $DEFAULT_LIST_SUBCOMMANDS != 1 ]]	&& declare -i DEFAULT_LIST_SUBCOMMANDS=0

declare -i EXIT_NO_COMMAND=1
declare -i EXIT_NO_SUBCOMMAND_FOUND=2
declare -i EXIT_NO_SUBCOMMANDS_FOUND=3

declare cmd=""
declare cmd_name="$1"; shift;
declare -i fast_basename=1

[[ "x$MSG_SUBCOMMAND_NOT_GIVEN" = 'x' ]] && declare MSG_SUBCOMMAND_NOT_GIVEN='ERROR: No command specified'
[[ "x$MSG_SUBCOMMAND_NOT_FOUND" = 'x' ]] && declare MSG_SUBCOMMAND_NOT_FOUND="WARNING: '$cmd_name' not available as a $APP_NAME_CLI subcommand. Maybe you ment something else?"

# Testing for fast basename support
declare TMP='/path/to/trim/test.txt.gz'
TMP="${TMP##*/}"
if [[ "${TMP}" = 'test.txt.gz' ]]; then
	fast_basename=0
fi

unset TMP

#
# FUNCTIONS
#
bashsubimp::error()
{
	echo "  $1" 1>&2
	if [[ "x$2" != "x" ]]; then
		exit $2
	fi
}

bashsubimp::list_subcommands() {
	declare filename=""
	declare -i i=0
	declare oldIFS="$IFS"
	IFS=:

	echo "  $APP_NAME_APP Commands:"
	printf "    %-12s %s\n" list "List all subcommands."
	printf "    %-12s %s\n" version "Display application version number only."
	printf "    %-12s %s\n" Version "Display application label with version number."

	while read -r path
	do
		IFS="$oldIFS"
		for filename in $(ls "${path}/${CMD_PREFIX}"* 2> /dev/null); do
			# echo "\$filename: $filename"
			if [[ "${filename##*.}" != 'js' ]]; then
				if [[ $fast_basename = 0 ]]; then
					filename="${filename##*/}"
					if [[ "${filename##*.}" = 'shlib' ]]; then
						filename="${filename%.*}"
					fi
					filename="${filename#$CMD_PREFIX}"
				else
					filename="$(basename "$filename")"
					filename="$(echo "$filename" | sed "s/^$CMD_PREFIX//")"
				fi
				echo "    $filename"
			fi
		done
		IFS=:
	done <<< $(echo "$PATH" | tr ':' '\n')

	IFS="$oldIFS"
}

#
# Subcommand Processing
#
case "$cmd_name" in
	list)
		bashsubimp::list_subcommands
		exit 0
		;;
	version)
		echo "$APP_VERSION"
		exit 0
		;;
	Version)
		echo "$APP_LABEL"
		exit 0
		;;
	*)
		cmd="${CMD_PREFIX}${cmd_name}"
		if [[ "x$cmd_name" = "x" ]] && [[ $DEFAULT_LIST_SUBCOMMANDS != 1 ]]; then
			bashsubimp::list_subcommands
		elif [[ "$cmd" != "$CMD_PREFIX" ]]; then
			if [[ $(type -t "$cmd" 2> /dev/null) = 'file' ]]; then
				"$cmd" "$@"
			else
				bashsubimp::error "$MSG_SUBCOMMAND_NOT_FOUND" $EXIT_NO_SUBCOMMAND_FOUND
			fi
		else
			bashsubimp::error "$MSG_SUBCOMMAND_NOT_GIVEN" $EXIT_NO_COMMAND
		fi
		;;
esac