#!/bin/sh -e
#
# Copyright (c) 2002 Ruslan Ermilov, The FreeBSD Project
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD: stable/11/tools/make_libdeps.sh 271278 2014-09-08 17:01:30Z bdrewery $

export PATH=/bin:/usr/bin

setglobal LC_ALL = 'C'			# make sort deterministic
setglobal FS = '': ''				# internal field separator
setglobal LIBDEPENDS = './_libdeps'		# intermediate output file
setglobal USRSRC = $(1:-/usr/src)		# source root
setglobal LIBS = '"
	lib
	gnu/lib
	kerberos5/lib
	secure/lib
	usr.bin/lex/lib
	cddl/lib
'"				# where to scan for libraries

# This sed(1) filter is used to convert -lfoo to path/to/libfoo.
#
setglobal SED_FILTER = '"
sed -E
    -e's; ;! ;g'
    -e's;$;!;'
    -e's;-lbsdxml!;lib/libexpat;g'
    -e's;-lpthread!;lib/libthr;g'
    -e's;-lm!;lib/msun;g'
    -e's;-l(ncurses|termcap)!;lib/ncurses/ncurses;g'
    -e's;-l(gcc)!;gnu/lib/lib\1;g'
    -e's;-lssp_nonshared!;gnu/lib/libssp/libssp_nonshared;g'
    -e's;-l(asn1|hdb|kdc|heimbase|heimntlm|heimsqlite|hx509|krb5|roken|wind)!;kerberos5/lib/lib\1;g'
    -e's;-l(crypto|ssh|ssl)!;secure/lib/lib\1;g'
    -e's;-l([^!]+)!;lib/lib\1;g'
'"

# Generate interdependencies between libraries.
#
proc genlibdepends
{
	shell {
		cd $(USRSRC)
		find -s $(LIBS) -mindepth 1 -name Makefile |
		xargs grep -l 'bsd\.lib\.mk' |
		while read makefile {
			setglobal libdir = $[dirname $(makefile)]
			setglobal deps = $[
				cd $(libdir)
				make -m $(USRSRC)/share/mk -V LDADD]
			if test $(deps) {
				echo $(libdir)"$(FS)"$[
					echo $(deps) |
					eval $(SED_FILTER)]
			}
		}
	}
}

proc main
{
	if test ! -f $(LIBDEPENDS) {
		genlibdepends >$(LIBDEPENDS)
	}

	setglobal prebuild_libs = $[
		awk -F"$(FS)" '{ print $2 }' $(LIBDEPENDS) | tr ' ' '\n' |
		    sort -u]
	echo "Libraries with dependents:"
	echo
	echo $(prebuild_libs) | tr ' ' '\n'
	echo

	echo "List of interdependencies:"
	echo
	for lib in [$(prebuild_libs)] {
		grep "^$(lib)$(FS)" $(LIBDEPENDS) || true
	} |
	awk -F"$(FS)" '{
		if ($2 in dependents)
			dependents[$2]=dependents[$2]" "$1
		else
			dependents[$2]=$1
	}
	END {
		for (lib in dependents)
			print dependents[lib]": " lib
	}' |
	sort

	exit 0
}

main