#!/bin/sh

set -e

cwd="`pwd`"
date="`date +'%d %h %Y'`"

process () {
	(cd config &&
	 rm -f trace &&
	 m4 -P -I "$config" -DDB_DATE="$date" \
		common/init.m4 config.m4 common/main.m4 - common/final.m4
	)
}

txtconvert () {
	src=$1; dst=$2
	echo "	generating $dst from $src ..."
	rm -f html/txt/$dst.html html/txt/$dst.out
	perl -ne 'print unless m/^Other pages:$/ .. /^\<hr\>/' \
		html/$src.out >html/txt/$dst.html
	HOME=/dev/null lynx -nolist -dump -cfg=html/lynx-cfg \
		file://localhost/$cwd/html/txt/$dst.html >html/txt/$dst.out
	rm html/txt/$dst.html
}

config=local
if [ $# != 0 ]; then config="$1"; shift; fi
if [ $# != 0 ]; then echo >&2 'usage: ./build [<config>]'; false; fi

if [ ! -f config/$config/config.m4 ]; then echo >&2 "no such config: $config"; false; fi

errs="`echo 'm4_undivert(1)' | process | sed -ne '/[^ \t]/ s/^/ /p'`"
if [ "x$errs" != x ]
then
	echo >&2 'unexpected residues:'
	echo "$errs"
	false
fi

echo "macro substitutions ..."
for f in `find -name '*.in'`
do
	h="`echo $f | sed -e 's/\.in$//'`"
	process <"$f" >"$h.out"
	mv config/trace "$h.trace"
	if egrep 'DBC?U?_' /dev/null "$h.out"
	then
		echo >&2 'undefined macros'
		false
	fi
	[ ! -x "$f" ] || chmod +x "$h.out"
done

echo "documentation conversion ..."
txtconvert Reporting.html bug-reporting.txt
txtconvert Access.html bug-log-access.txt
txtconvert server-request.html bug-log-mailserver.txt
txtconvert Developer.html bug-maint-info.txt
txtconvert server-control.html bug-maint-mailcontrol.txt
txtconvert server-refcard.html bug-mailserver-refcard.txt

cgilibexist=`echo 'test -f DBC_CGILIB_PATH && echo true || echo false' | process`
htaccesspath=`echo DBC_HTACCESS_PATH | process`

rm -f install install.new
process <<'END' >install.new
#!/bin/sh
	set -e
	test -d DBC_BASE || mkdir DBC_BASE
	bugsid () {
		echo "installing $1 ..."
		test -d "$2" || mkdir "$2"
		cd "$1"
		for f in *.out
		do
			h="`echo $f | sed -e 's/\.out$//'`"
			rm -f "$2/$f"
			cp "./$f" "$2/"
			mv -f "$2/$f" "$2/$h"
		done
		cd "$3"
	}
	bugsid scripts DBC_SCRIPT_PATH ..
	bugsid html DBC_HTML_PATH ..
	bugsid html/txt DBC_DOCDIR_PATH ../..
	bugsid cgi DBC_CGI_PATH ..
END
if [ "x$htaccesspath" != x ]; then
	process <<END >>install.new
		cat <<'END2' >$htaccesspath.new
DBC_HTACCESS_CONTENTS
END2
		mv -f $htaccesspath.new $htaccesspath
END
fi

if $cgilibexist
then
	cgiii='cgi-lib already exists in DBC_CGILIB_PATH'
else
	cgiii='	DBC_CGILIB_PATH'
	process <<'END' >>install.new
		echo "installing cgi-lib.pl ..."
		cp cgi/cgi-lib.pl DBC_CGILIB_PATH.new
		mv -f DBC_CGILIB_PATH.new DBC_CGILIB_PATH
END
fi
process >>install.new <<'END'
	echo "setting up bugs database ..."
	DBC_SCRIPT_PATH/initialise
	echo "done."
	echo "You will have to intall the crontab (misc/crontab.out) yourself."
	exit 0
END
chmod +x install.new
mv -f install.new install

cgi="`cd cgi && echo *.out | sed -e 's/\.out//g'`"

process <<END
built for $config date DB_DATE ...
	will install unchanging files into:
		DBC_SCRIPT_PATH/
		DBC_HTML_PATH/
		DBC_CGI_PATH/ ($cgi)
	$cgiii
	will store data in:
		DB_HTMLDB_PATH/
		DBC_SPOOL_PATH/
	will expect CGI scripts to be available in:
		DBC_CGI_URL/
END

echo "run ./install to install"
exit 0