#! /bin/sh
# SPDX-FileCopyrightText: Eric S. Raymond <esr@thyrsus.com>
# SPDX-License-Identifier: BSD-2-Clause
#
# tapdiffer - Render diff between input and checkfile as a TAP report
#
# Usage: tapdiffer LEGEND CHECKFILE
#
# Output is a TAP report, ok if the diff is empty and not ok otherwise.
# A nonempty diff is shipped as a TAP YAML block following "not ok" 
# unless QUIET=1 in the environment.
#
if [ "$1" = "-w" ]
then
    diffopts=-ubZ
    shift
else
    diffopts=-u
fi

legend=$1
checkfile=$2

trap 'rm /tmp/tapdiff$$' EXIT HUP INT QUIT TERM

if diff --text "${diffopts}" ${checkfile} - >/tmp/tapdiff$$
then
	echo "ok - ${legend}"
else
	echo "not ok - ${checkfile}: ${legend}"
	if [ ! "${QUIET}" = 1 ]
	then
		echo "  --- |"
		sed </tmp/tapdiff$$ -e 's/^/  /'
		echo "  ..."
	fi
fi

# end