new

#!/bin/ksh

PROG=$(basename "$0")

: "${NEW_DIR:="$HOME/.new"}"

USAGE="
Usage: $PROG [ -h ] [ -l ] [ -o output ] [ -t newtemp ] [ template ]

	Create new files based off of a common template

	-h		This help message
	-l		List available templates
	-t newtemp	Create a new template named newtemp
	-o output	Output new file template to file output
			instead of stdout
"

if [ ! -d "$NEW_DIR/." ]
then
	echo "$PROG: Error: could not find new files" \
    "directory ~/.new or NEW_DIR ($NEW_DIR)" >&2
	exit 1
fi

output=
LIST_OPT=0
NEWTEMP_OPT=0
TEMP_OPT=0
OUT_OPT=0
SYNTAX="$PROG: option syntax error."

if [ "$#" = 0 ]
then
	echo "$USAGE" >&2
	exit 1
fi

while [ "$#" -gt 0 ]
do
	OPT="$1"
	case "$OPT" in
		-h)	echo "$USAGE" >&2
				exit 1
				;;
		-l)	LIST_OPT=1
			;;
		-t)	NEWTEMP_OPT=1
			newtemp="$2"
			[ -z "$newtemp" ] && { echo "$SYNTAX" ;echo "$USAGE" ;exit 1 ;} >&2
			shift
			;;
		-o)	OUT_OPT=1
			output="$2"
			[ -z "$output" ] && { echo "$SYNTAX" ;echo "$USAGE"  ;exit 1 ;} >&2
			shift
			;;
		# unknown option
		-?)	echo "$SYNTAX" >&2
			echo "$USAGE" >&2
			exit 1
			;;
		*)	break
			;;
	esac
	shift
done

if [ "$#" != 0 ]
then
	template="$1"
	TEMP_OPT=1
	shift
	if [ "$#" -gt 0 ]
	then
		echo "$SYNTAX" >&2
		echo "$USAGE" >&2
		exit 1
	fi
fi

if [ "$LIST_OPT" = 1 ]
then
	echo "Templates:"
  for t in "$NEW_DIR"/*
  do
    echo "	$(basename "$t")"
  done
	exit 0
fi


if [ "$NEWTEMP_OPT" = 1 ]
then
	if [ -f "$NEW_DIR/$newtemp" ]
	then
		echo "$PROG: Error: Template $newtemp already exists." >&2
		exit 1
	fi
	touch "$NEW_DIR/$newtemp"
	ED=
	{ [ -n "$VISUAL" ] && ED="$VISUAL" ;} || \
	{ [ -n "$EDITOR" ] && ED="$EDITOR" ;} || \
	{ [ -e /usr/bin/vi ] && ED=/usr/bin/vi ;} || \
	{ [ -e /bin/vi ] && ED=/bin/vi ;} || \
	{ [ -e /bin/ed ] && ED=/bin/ed ;} || \
	{ echo "$PROG: Could not located an editor. " \
			"New template created at $NEW_DIR/${newtemp}." >&2 ;exit 1 ;}

	"$ED" "$NEW_DIR/$newtemp"
	exit 0
fi

if [ "$TEMP_OPT" = 1 ]
then
	if [ ! -f "$NEW_DIR/$template" ]
	then
		echo "$PROG: Error: Template could not be found ($template)." >&2
		exit 1
	fi


	if [ "$OUT_OPT" = 1 ]
	then
		eval "exec 1>$output"
	fi
	cat "$NEW_DIR/$template"
	exit 0
fi