#!/bin/sh

if [ $# -gt 1 -o "$1" = "--help" ]; then
    echo "This is not a standard GNU configure script. It is an" 1>&2
    echo "interactive shell script which can takes as only argument" 1>&2
    echo "an answer to the first question asked by the interactive run." 1>&2
    echo "If you wish information about what it does, you will" 1>&2
    echo "have to read the script source." 1>&2
    exit 1
fi

echo "This script configures the Makefile in the plan distribution. It saves a"
echo "backup of the original file in Makefile.orig, and the previous Makefile"
echo "in Makefile.back. It does not modify or install any other files."

line=line
which $line >/dev/null 2>&1 || line=read	# Linux has no line command

readline()
{
	if test $interactive = no; then
		in=
	else
		case $line in
			line)	in=`line`;;
			read)	read in;;
		esac
	fi
}


#-----------------------------------------------------------------------------
# defaults
#-----------------------------------------------------------------------------

interactive=yes

if test x"$1" != x; then
	in=$1
	interactive=no
	echo ""
	echo "Running in non-interactive mode"
	echo ""
else
	echo ""
	echo "Choose defaults for all following questions:"
	echo "1 -- same as the previous configuration (default)"
	echo "2 -- factory defaults (requires write access to /usr/local)"
	echo "3 -- Silicon Graphics freeware (requires root privileges)"
	echo "4 -- Debian Linux standard (requires root privileges)"
	echo "5 -- SuSE Linux standard (requires root privileges)"
	readline
fi

case ${in:-1} in
  1)	sed '/end of configuration section/q' Makefile > .conftemp
	. ./.conftemp
	rm .conftemp
	PLANHOME=
	test x$PLANRULE = x || PLANHOME=`echo $PLANRULE | sed 's/.*=//;s/"//g'`
	;;
  2)	DIR=/usr/local/bin		# traditional factory defaults
	SBIN=
	LIB=/usr/local/lib
	MAN=/usr/local/man/man
	CATMAN=/usr/catman/local/cat
	PLANHOME=
	PLANLOCK=
	PLANDLOCK=
	INCDIR=
	LEX=lex
	YACC=yacc
	NOB_UID=
	NOB_GID=
	CPP_PATH='/lib/cpp -P -I$(HELP)'
	DOFORK=TRUE
	JAPAN=
	DEBUG=-O2
	DEFTARGET=help
	HOLIDAY=
	;;
  3)	DIR=/usr/freeware/bin		# SGI freeware CD
	SBIN=
	LIB=/usr/freeware/lib
	MAN=/usr/share/man/local/man/man
	CATMAN=/usr/share/catman/local/cat
	PLANHOME=
	PLANLOCK=
	PLANDLOCK=
	INCDIR=
	LEX=lex
	YACC=yacc
	NOB_UID=60001
	NOB_GID=60001
	CPP_PATH='/lib/cpp -P -I$(HELP)'
	DOFORK=TRUE
	JAPAN=
	DEBUG="-O2 -n32"
	DEFTARGET=sgi6
	HOLIDAY=
	;;
  4)	DIR=/usr/bin			# Debian Linux
	SBIN=/usr/sbin
	LIB=/usr/lib/plan
	HELP=/usr/share/plan
	NETPLANDIR=/var/lib/plan
	MAN=/usr/share/man/man
	CATMAN=NONE
	PLANHOME=.plan.dir
	PLANLOCK=
	PLANDLOCK=
	INCDIR=
	LEX=lex
	YACC=yacc
	NOB_UID=65534
	NOB_GID=65534
	CPP_PATH='/usr/bin/cpp -P -I$(HELP)'
	DOFORK=FALSE
	JAPAN=
	DEBUG="-O2"
	DEFTARGET=linux
	HOLIDAY=NONE
	;;
  5)	DIR=/usr/X11R6/bin		# SuSE Linux
	SBIN=/usr/X11R6/bin
	LIB=/usr/lib/plan
	HELP=/usr/lib/plan
	NETPLANDIR=/usr/lib/plan
	MAN=/usr/X11R6/man/man
	CATMAN=NONE
	PLANHOME=
	PLANLOCK=
	PLANDLOCK=
	INCDIR=
	LEX=lex
	YACC=yacc
	NOB_UID=65534
	NOB_GID=65534
	CPP_PATH='/usr/bin/cpp -P -I$(HELP)'
	DOFORK=FALSE
	JAPAN=
	DEBUG="-O2"
	DEFTARGET=linux
	HOLIDAY=/usr/lib/plan/holiday
	;;
  mi)	DIR=/usr/local/mi/bin		# mental images
	SBIN=
	LIB=/usr/local/mi/lib
	MAN=
	CATMAN=
	PLANHOME=
	PLANLOCK=
	PLANDLOCK=
	INCDIR=
	LEX=lex
	YACC=yacc
	NOB_UID=
	NOB_GID=
	CPP_PATH='/lib/cpp -P -I$(HELP)'
	DOFORK=TRUE
	JAPAN=
	DEBUG=-O2
	DEFTARGET=sgi6
	HOLIDAY=
	;;
  *)	echo "illegal choice, exiting."
	exit;;
esac

#-----------------------------------------------------------------------------
# configuration questions
#-----------------------------------------------------------------------------

echo ""
echo "installation directory for plan executable? [$DIR]"
readline; DIR=${in:-$DIR}

SBIN=${SBIN:-$DIR}
echo ""
echo "installation directory for system executables (netplan)? [$SBIN]"
readline; SBIN=${in:-$SBIN}

LIB=${LIB:-$DIR}
echo ""
echo "installation directory for support executables and files? [$LIB]"
readline; LIB=${in:-$LIB}

HELP=${HELP:-$LIB}
echo ""
echo "installation directory for online help file? [$HELP]"
readline; HELP=${in:-$HELP}

NETPLANDIR=${NETPLANDIR:-$LIB}
echo ""
echo "installation directory for netplan's netplan.dir directory? [$NETPLANDIR]"
readline; NETPLANDIR=${in:-$NETPLANDIR}

MAN=${MAN:-$LIB}
echo ""
echo "The man pages go into sections 1 and 4, either in nroff or catman format."
echo "Please choose the directory root. For example, to install /foo/man1/plan"
echo "and /foo/man4/pland, enter /foo/man (without the trailing 1 or 4). Enter"
echo "NONE if you don't want nroff manpages."
echo "installation directory prefix for nroff man pages? [$MAN]"
readline; MAN=${in:-$MAN}

CATMAN=${CATMAN:-$MAN}
echo ""
echo "installation directory for cat man pages (or NONE)? [$CATMAN]"
readline; CATMAN=${in:-$CATMAN}

test x$PLANHOME = x && PLANHOME=/
echo ""
echo "You can either put lock files into /tmp and the default appointment files"
echo "in your home directory, or create a subdirectory in your home directory"
echo "that stores all lock and appointment files. Enter a single slash (/) for"
echo "the former and the name of a directory (recommended: .plan.dir) in the"
echo "latter case (note: if you change from a previous installation, you will"
echo "have to move the old files manually): [$PLANHOME]"
readline; PLANHOME=${in:-$PLANHOME}
if test x$PLANHOME = x/; then
	PLANHOME=
	PLANLOCK=${PLANLOCK:-/tmp/.plan%d}
	PLANDLOCK=${PLANDLOCK:-/tmp/.pland%d}
else
	PLANLOCK=${PLANLOCK:-\~/$PLANHOME/lock.plan}
	PLANDLOCK=${PLANDLOCK:-\~/$PLANHOME/lock.pland}
fi

echo ""
echo "main (plan) lockfile (use %d for user ID)? [$PLANLOCK]"
readline; PLANLOCK=${in:-$PLANLOCK}

echo ""
echo "daemon (pland) lockfile (use %d for user ID)? [$PLANDLOCK]"
readline; PLANDLOCK=${in:-$PLANDLOCK}

if test x$LEX = x; then
	LEX=`which lex`
	case $LEX in /);; *) LEX="`which flex` -l";; esac
	case $LEX in /);; *) LEX=;; esac
fi
echo ""
echo "Where is your lex program? [$LEX]"
readline; LEX=${in:-$LEX}

if test x$YACC = x; then
	YACC=`which yacc`
	case $YACC in /);; *) LEX="`which bison` -y";; esac
	case $YACC in /);; *) LEX=;; esac
fi
echo ""
echo "Where is your yacc program? [$YACC]"
readline; YACC=${in:-$YACC}

test "x$CPP_PATH" = x && CPP_PATH='/lib/cpp -P -I$(HELP)'
echo ""
echo "If you have a C preprocessor, you can enter a command line here that will"
echo "be used by plan to preprocess holiday configuration files. Enter a single"
echo "slash (/) to disable preprocessing: [$CPP_PATH]"
readline; CPP_PATH=${in:-$CPP_PATH}
test "x$CPP_PATH" = x/ && CPP_PATH=

def=y
test ${DOFORK:-TRUE} = FALSE && def=n
echo ""
echo "Should plan background itself on startup, as if \`\`plan &'' had been"
echo "used? Answer y or n: [$def]"
readline; in=${in:-$def}
DOFORK=TRUE
test $in = n && DOFORK=FALSE

IFS=":"
set `grep nobody /etc/passwd | sed 's/[^0-9:]/x/g'`
test x$NOB_UID = x && NOB_UID=${3:-60001}
test x$NOB_GID = x && NOB_GID=${4:-60001}
echo ""
echo "Enter an unprivileged (nobody) numerical user ID for netplan: [$NOB_UID]"
readline; NOB_UID=${in:-$NOB_UID}
echo ""
echo "Enter an unprivileged (nobody) numerical group ID for netplan: [$NOB_GID]"
readline; NOB_GID=${in:-$NOB_GID}

tmp=n
test x"$JAPAN" = x || tmp=y
echo ""
echo "Do you want to compile a Japan-specific binary? Answer y or n: [$JAPAN]"
readline; tmp=${in:-$tmp}
if test x$tmp = xy; then
	JAPAN='"$(JAPANDEFS)"'
	HOLIDAY=japan
fi

test x$HOLIDAY = x && HOLIDAY=german
echo ""
echo "The following custom holiday definitions are available:"
ls -1 ../holiday | sed 's/holiday_/    /'
echo "Choose one: [$HOLIDAY]"
readline; HOLIDAY=${in:-$HOLIDAY}

test x$DEFTARGET = xhelp && DEFTARGET=linux
echo ""
echo "The following target systems are available:"
grep "^.@echo .  make " Makefile | sed 's/.@echo....make/   /;s/"$//'
echo "Choose a code from the left column: [$DEFTARGET]"
readline; DEFTARGET=${in:-$DEFTARGET}

#-----------------------------------------------------------------------------
# rewrite Makefile
#-----------------------------------------------------------------------------

planrule=
test x$PLANHOME = x || planrule="-DPLANHOME=\\\\\"\"$PLANHOME\"\\\\\""
test -f Makefile.orig ||\
	(mv Makefile Makefile.orig && cp Makefile.orig Makefile)
cp Makefile Makefile.back
sed    "s+^DIR=.*+DIR=$DIR+;\
	s+^LIB=.*+LIB=$LIB+;\
	s+^SBIN=.*+SBIN=$SBIN+;\
	s+^HELP=.*+HELP=$HELP+;\
	s+^NETPLANDIR=.*+NETPLANDIR=$NETPLANDIR+;\
	s+^MAN=.*+MAN=$MAN+;\
	s+^CATMAN=.*+CATMAN=$CATMAN+;\
	s+^PLANRULE=.*+PLANRULE=$planrule+;\
	s+^PLANLOCK=.*+PLANLOCK=\"$PLANLOCK\"+;\
	s+^PLANDLOCK=.*+PLANDLOCK=\"$PLANDLOCK\"+;\
	s+^INCDIR=.*+INCDIR=$INCDIR+;\
	s+^LEX=.*+LEX=$LEX+;\
	s+^YACC=.*+YACC=$YACC+;\
	s+^NOB_UID=.*+NOB_UID=$NOB_UID+;\
	s+^NOB_GID=.*+NOB_GID=$NOB_GID+;\
	s+^CPP_PATH=.*+CPP_PATH='$CPP_PATH'+;\
	s+^DOFORK=.*+DOFORK=$DOFORK+;\
	s+^JAPAN=.*+JAPAN=$JAPAN+;\
	s+^HOLIDAY=.*+HOLIDAY=$HOLIDAY+;\
	s+^DEBUG=.*+DEBUG=$DEBUG+;\
	s+^DEFTARGET=.*+DEFTARGET=$DEFTARGET+" Makefile > .conftemp
mv .conftemp Makefile

echo ""
echo " ---  Done  ---"
echo ""
echo "Now run \`\`make clean'', \`\`make'' and \`\`make install'' to compile"
echo "and install plan."