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#!/bin/sh
# toc -- run troff in three passes
usage() {
echo "usage: $0 [cmd ... \|] <troff> [arg ...]" 1>&2
echo "(input should be given on stdin)" 1>&2
exit 1
}
tmp() {
x=`mktemp` || exit $?
RM=$RM\ $x
eval $1=\$x
}
end() {
cat $1
exit $s
}
RM=rm
AWK='
/^\(toc\)/ { print substr($0, 6); next }
{ print > "/dev/stderr" }
'
[ $# -eq 0 ] && usage
trap '$RM; RM=; exit 130' INT
trap '$RM' EXIT
for t in f g h i j; do tmp $t; done
echo $0: first pass 1>&2
tee $f | { eval "$@" -rte=1 -dtf=; s=$?; } 2>&1 1>$i | awk "$AWK" >$g
[ -s $g ] || end $i
echo $0: second pass 1>&2
{ eval "$@" -rte=1 -dtf=$g; s=$?; } <$f 2>&1 1>$j | awk "$AWK" >$h
diff -q $g $h >/dev/null && end $j
echo $0: third pass 1>&2
{ eval "$@" -rte=0 -dtf=$h; s=$?; } <$f | grep -v '^(toc)'
exit $s
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