#!/bin/sh
#
# Copyright (C) 2001-2023 Graeme Walker <graeme_walker@users.sourceforge.net>
# 
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
# ===
#
# reduce
#
# Runs the 'reduce.pl' script for emailrelay source files.
#
# usage: reduce {--create|--apply|--undo} [--debug]
#

thisdir="`cd \`dirname $0\` && pwd`"
srcdir="`cd \`dirname $0\`/../src && pwd`"
maindir="`cd \`dirname $0\`/../src/main && pwd`"

usage="{--create|--apply|--undo}"
opt_debug=""
if test "$2" = "--debug"
then
	opt_debug="--debug"
:
elif test "$2" != ""
then
	echo usage: `basename $0` "$usage" >&2
	exit 2
fi

cfg_dirs="glib gssl gnet gauth gpop gstore gfilters gverifiers gsmtp"

cfg_exclude_files="__none__"
cfg_exclude_files="${cfg_exclude_files}|geventemitter.cpp" # used differently for select vs epoll
cfg_exclude_files="${cfg_exclude_files}|gtest.cpp" # preprocessor shenanigans
cfg_exclude_files="${cfg_exclude_files}|ginterfaces_unix.cpp" # preprocessor shenanigans

cfg_exclude_functions="__none__"
cfg_exclude_functions="${cfg_exclude_function} GNet::inet_pton_imp" # see gdef.h
cfg_exclude_functions="${cfg_exclude_function} GNet::inet_ntop_imp" # see gdef.h
cfg_exclude_functions="${cfg_exclude_function} G::LogOutput::assertion" # needed for CPPFLAGS=-D_DEBUG etc

cd "$maindir"

if test "$1" = "--create"
then
	# check source is unreduced
	if grep -q -l "ifndef G_LIB_SMALL" ../glib/*.cpp
	then
		echo "reduce: error: source code already reduced" >&2
		exit 1
	fi

	# start with a clean build with everything included (debugging, openssl, mbedtls etc) except the gui
	echo -n "reduce: running intial build..."
	if cd ../.. && ./configure.sh -d -q --disable-gui --enable-submission --without-doxygen --with-openssl --with-mbedtls --with-submission
	then
		cd "$maindir"
	else
		echo ".. configure failed"
		exit 1
	fi
	if test ! -e Makefile ; then echo "reduce: error: no Makefile in $maindir" >&2 ; exit 1 ; fi
	if make -C .. -j 10 V=0 >/dev/null 2>&1 ; then :
	else
		echo ".. make failed"
		exit 1
	fi
	echo ".. done"

	# run 'reduce --append --out' for every source file
	t="`perl -e 'print time'`"
	errors=0
	for d in $cfg_dirs
	do
		for f in `$thisdir/reduce.pl --sources "../$d"`
		do
			if test ! -f "../$d/$f"
			then
				echo "reduce: error: source code not found [src/$d/$f]" >&2
				exit 1
			fi
			if grep -q -l "ifndef G_LIB_SMALL" "../$d/$f"
			then
				echo "reduce: error: source code already reduced" >&2
				exit 1
			fi
			if echo "$f" | egrep -q "$cfg_exclude_files" ; then :
			else
				if "$thisdir/reduce.pl" $opt_debug --append --out "$srcdir/reduce.dat.$t" -- "../$d/$f" 'make -C ..' 'make -C .. extra' 'make -C ../../test programs'
				then :
				else
					echo "reduce: error: failed to reduce [$f]" >&2
					errors=1
				fi
			fi
		done
	done

	# fix up -- delete specific functions
	for re in $cfg_exclude_functions
	do
		sed -i "/$re/d" "$srcdir/reduce.dat.$t"
	done

	# report the output
	if test "$errors" -ne 0
	then
		echo "reduce: error: failed to reduce one or more source files: partial output in reduce.dat.$t" >&2
	else
		echo "$srcdir/reduce.dat.$t"
	fi

	# stash the output for "--apply"
	cp "$srcdir/reduce.dat.$t" "$srcdir/.reduce.dat"
:
elif test "$1" = "--apply"
then
	"$thisdir/reduce.pl" --in "$srcdir/.reduce.dat"
:
elif test "$1" = "--undo"
then
	"$thisdir/reduce.pl" --undo "$srcdir"
:
else
	echo usage: `basename $0` "$usage" >&2
	exit 2
fi