XCOMM!/bin/sh
XCOMM
XCOMM $XConsortium: mdepend.cpp,v 1.7 91/08/22 11:42:53 rws Exp $
XCOMM
XCOMM	Do the equivalent of the 'makedepend' program, but do it right.
XCOMM
XCOMM	Usage:
XCOMM
XCOMM	makedepend [cpp-flags] [-w width] [-s magic-string] [-f makefile]
XCOMM	  [-o object-suffix]
XCOMM
XCOMM	Notes:
XCOMM
XCOMM	The C compiler used can be overridden with the environment
XCOMM	variable "CC".
XCOMM
XCOMM	The "-v" switch of the "makedepend" program is not supported.
XCOMM
XCOMM
XCOMM	This script should
XCOMM	work on both USG and BSD systems.  However, when System V.4 comes out,
XCOMM	USG users will probably have to change "silent" to "-s" instead of
XCOMM	"-" (at least, that is what the documentation implies).
XCOMM
CC=PREPROC

silent='-'

TMP=/tmp/mdep$$
CPPCMD=${TMP}a
DEPENDLINES=${TMP}b
TMPMAKEFILE=${TMP}c
MAGICLINE=${TMP}d
ARGS=${TMP}e

trap "rm -f ${TMP}*; exit 1" 1 2 15
trap "rm -f ${TMP}*; exit 0" 1 2 13

echo " \c" > $CPPCMD
if [ `wc -c < $CPPCMD` -eq 1 ]
then
    c="\c"
    n=
else
    c=
    n="-n"
fi

echo $n "$c" >$ARGS

files=
makefile=
magic_string='# DO NOT DELETE'
objsuffix='.o'
width=78
endmarker=""
verbose=n

while [ $# != 0 ]
do
    if [ "$endmarker"x != x -a "$endmarker" = "$1" ]; then
	endmarker=""
    else
	case "$1" in
	    -D*|-I*)
		echo $n " '$1'$c" >> $ARGS
		;;

	    -g|-o)
		;;

	    *)
		if [ "$endmarker"x = x ]; then
		    case "$1" in 	
			-w)
			    width="$2"
			    shift
			    ;;
			-s)
			    magic_string="$2"
			    shift
			    ;;
			-f)
			    makefile="$2"
			    shift
			    ;;
			-o)
			    objsuffix="$2"
			    shift
			    ;;
			
			--*)
			    echo "$1" | sed 's/^\-\-//' >${TMP}end
			    endmarker="`cat ${TMP}end`"
			    rm -f ${TMP}end
			    if [ "$endmarker"x = x ]; then
				endmarker="--"
			    fi
			    ;;
			-v)
			    verbose="y"
			    ;;

			-cc)
			    CC="$2"
			    shift
			    ;;

			-*)
			    echo "Unknown option '$1' ignored" 1>&2
			    ;;
			*)
			    files="$files $1"
			    ;;
		    esac
		fi
		;;
	esac
    fi
    shift
done
echo ' $*' >> $ARGS

echo "exec $CC `cat $ARGS`" > $CPPCMD
chmod +x $CPPCMD
rm $ARGS

case "$makefile" in
    '')
	if [ -r makefile ]
	then
	    makefile=makefile
	elif [ -r Makefile ]
	then
	    makefile=Makefile
	else
	    echo 'no makefile or Makefile found' 1>&2
	    exit 1
	fi
	;;
    -)
	makefile=$TMPMAKEFILE
	;;
esac

if [ "$verbose"x = "y"x ]; then 
    cat $CPPCMD
fi

echo '' > $DEPENDLINES
for i in $files
do
    $CPPCMD $i \
      | sed -n "/^#/s;^;$i ;p"
done \
  | sed -e 's|/[^/.][^/]*/\.\.||g' -e 's|/\.[^.][^/]*/\.\.||g' \
    -e 's|"||g' -e 's| \./| |' \
  | awk '{
	if ($1 != $4  &&  $2 != "#ident")
	    {
	    ofile = substr ($1, 1, length ($1) - 2) "'"$objsuffix"'"
	    print ofile, $4
	    }
	}' \
  | sort -u \
  | awk '
	    {
	    newrec = rec " " $2
	    if ($1 != old1)
		{
		old1 = $1
		if (rec != "")
		    print rec
		rec = $1 ": " $2
		}
	    else if (length (newrec) > '"$width"')
		{
		print rec
		rec = $1 ": " $2
		}
	    else
		rec = newrec
	    }
	END \
	    {
	    if (rec != "")
		print rec
	    }' \
  | egrep -v '^[^:]*:[ 	]*$' >> $DEPENDLINES

trap "" 1 2 13 15	# Now we are committed
case "$makefile" in
    $TMPMAKEFILE)
	;;
    *)
	rm -f $makefile.bak
	cp $makefile $makefile.bak
	echo "Appending dependencies to $makefile"
	;;
esac

XCOMM
XCOMM Append the magic string and a blank line so that /^$magic_string/+1,\$d
XCOMM can be used to delete everything from after the magic string to the end
XCOMM of the file.  Then, append a blank line again and then the dependencies.
XCOMM
cat >> $makefile << END_OF_APPEND

$magic_string

END_OF_APPEND
ed $silent $makefile << END_OF_ED_SCRIPT
/^$magic_string/+1,\$d
w
q
END_OF_ED_SCRIPT
echo '' >>$makefile
cat $DEPENDLINES >>$makefile

case "$makefile" in
    $TMPMAKEFILE)
	cat $TMPMAKEFILE
	;;

esac

rm -f ${TMP}*
exit 0