#! /bin/sh
set -e

# Check that a manual page formats without errors. Lintian does something
# similar for Debian packages. Relies on top_builddir, LINGUA, and EGREP
# variables exported from 'make check', or you can set them manually.

if [ -z "$top_builddir" ]; then
	echo "top_builddir unset; try 'make check' instead?"
	exit 77
elif [ -z "$LINGUA" ]; then
	echo "LINGUA unset; try 'make check' instead?"
	exit 77
elif [ -z "$EGREP" ]; then
	echo "EGREP unset; try 'make check' instead?"
	exit 77
fi

[ -x "$top_builddir/src/man" ] || exit 77

code=0
errors="$(LC_ALL=C MANWIDTH=80 MAN_KEEP_FORMATTING=1 "$top_builddir/libtool" \
		--mode=execute \
		-dlopen "$top_builddir/lib/.libs/libman.la" \
		-dlopen "$top_builddir/libdb/.libs/libmandb.la" \
		"$top_builddir/src/man" --warnings -E UTF-8 -l "$1" \
		2>&1 >/dev/null)" || code=$?

# Ignore wrapping failures for CJK manual pages; this should go away once
# groff supports these natively.
# Indeed, even for other languages we're going to get "cannot adjust line"
# if %manpath_config_file% expands to something long. Hmm. We'll just ignore
# this across the board for now.
errors="$(echo "$errors" | $EGREP -v "(cannot adjust line|can't break line)")" || true

if [ "$code" != 0 ]; then
	echo "man -E UTF-8 -l $1 failed with exit status $code and error output:"
	echo "$errors"
	exit $code
elif [ "$errors" ]; then
	echo "man -E UTF-8 -l $1 produced error output:"
	echo "$errors"
	exit 1
else
	exit 0
fi