#!/bin/sh
# configure - home-grown configuration script for bsd-games

# Default paths follow Filesystem Hierarchy Standard version 2.0.

# This will only ask some questions if the previous answers are appropriate.
# It will substitute values in the directories built in, and the main
# GNUmakefile.

# Allow defaults to be given by a script
if [ -e ./config.params ]; then
    . ./config.params
fi

subst_vars=srcdir

srcdir="`pwd`"

ask () {
    long_query="$1"
    query_var="$2"
    dflt_var="bsd_games_cfg_$query_var"
    eval default=\"\$\{${dflt_var}-\$3\}\"
    printf "%s [%s] " "$long_query" "$default"
    if [ "x$bsd_games_cfg_non_interactive" = xy ]; then
	# Follow default
	input=''
	echo "[ Using default ]"
    else
	read input
    fi
    case "$input" in
	'')
	    input="$default"
	    ;;
	*)
	    ;;
    esac
    eval $query_var=\"\$input\"
    subst_vars="$subst_vars $query_var"
}

ask_yn () {
    eval $2=
    eval answer=\$$2
    while test "x$answer" = x; do
	ask "$1" $2 $3
	eval answer=\$$2
	case "$answer" in
	    [yY]*)
		answer=y
		;;
	    [nN]*)
		answer=n
		;;
	    *)
		answer=
		echo "Please answer y or n"
		;;
        esac
    done
    eval $2=\$answer
}

askperms () {
    filetype=$1
    var_prefix=$2
    def_owner=$3
    def_group=$4
    def_perms=$5
    if [ $do_chown = y ]; then
	ask "$filetype owner" ${var_prefix}_owner $def_owner
	ask "$filetype group" ${var_prefix}_group $def_group
    fi
    ask "$filetype permissions" ${var_prefix}_perms $def_perms
    if [ $do_chown = y ]; then
	eval install_$var_prefix=\"install -c -m \$${var_prefix}_perms -o \$${var_prefix}_owner -g \$${var_prefix}_group\"
    else
	eval install_$var_prefix=\"install -c -m \$${var_prefix}_perms\"
    fi
    subst_vars="$subst_vars install_$var_prefix"
}

building_in () {
    echo " $build_dirs " |grep -q " $1 "
}

not_building_in () {
    echo " $no_build_dirs " |grep -q " $1 "
}

game_ask () {
    game="$1"
    if building_in "$game"; then
	ask "$2" "$3" "$4"
    fi
}

echo "For normal usage the installation prefix will be empty.  If you wish"
echo "to install everything in another directory to that in which it will"
echo "finally be located (so that your packaging system can then move it"
echo "there) you should name that directory here.  This is most likely to"
echo "be the case if you are packaging bsd-games for a Linux distribution."
ask "Installation prefix" install_prefix ''

echo "There may be some programs here you have from another package and so"
echo "do not want to build and install.  The most likely ones are banner,"
echo "factor and fortune."

ask "Games not to build" no_build_dirs ''

# Normalise white space in no_build_dirs
no_build_dirs="`echo $no_build_dirs`"

def_build_dirs=
for file in *; do
    if [ -e "$file/Makefrag" ] && ! not_building_in "$file" && [ "$file" != lib ]; then
	def_build_dirs="$def_build_dirs $file"
    fi
done
def_build_dirs=${def_build_dirs## }

ask "Games to build" build_dirs "$def_build_dirs"

# Normalise white space in build_dirs
build_dirs="`echo $build_dirs`"

echo
echo "*** NOTE - The default directories for installation follow the"
echo "*** Filesystem Hierarchy Standard version 2.0 (FHS).  If your"
echo "*** system still uses the older FSSTND 1.2, or if you wish to install"
echo "*** under /usr/local, you will need to check the paths and make"
echo "*** changes as appropriate.  If this is your first installation with"
echo "*** the new FHS paths, you may need to remove some old files after"
echo "*** installation."
echo

ask "Games directory" gamesdir /usr/games

# We put huntd in /usr/games by default (instead of /usr/sbin as earlier,
# or /usr/lib) since it can reasonably be called by users and counts
# properly more as a game than an ordinary user binary.
if building_in hunt; then
    echo
    echo "Hunt includes a daemon for coordinating games with multiple players"
    ask "Daemon directory" sbindir /usr/games
else
    sbindir=
    subst_vars="$subst_vars sbindir"
fi
if building_in fortune; then
    echo
    echo "Fortune includes a non-game utility strfile"
    ask "Non-game binary directory" usrbindir /usr/bin
else
    usrbindir=
    subst_vars="$subst_vars usrbindir"
fi

hidegame=:
subst_vars="$subst_vars hidegame"
if building_in dm; then
    echo
    echo "You may wish to restrict the use of games by user, terminal, load,"
    echo "etc..  This can be done by the use of dm.  If you use this"
    echo "configuration, then games will be kept in a non-world-searchable"
    echo "directory such as /usr/lib/games/dm and replaced by symlinks to dm."
    echo "Even if you don't choose this option, you will still be asked"
    echo "for the directory name, since you are building dm, and can change"
    echo "manually later.  It is strongly recommended that you keep the"
    echo "default answer of 'n'."
    ask_yn "Use dm and hide games" use_dm n
    # The default location is now /usr/lib/games/dm to conform to FHS 2.0.
    ask "Directory for hidden games" libexecdir /usr/lib/games/dm
    if [ "$use_dm" = y ]; then
	hidegame=$srcdir/hide-game
    fi
fi
ask "Section 6 manpage directory" man6dir /usr/share/man/man6
if building_in dm || building_in fortune; then
    ask "Section 8 manpage directory" man8dir /usr/share/man/man8
else
    man8dir=
    subst_vars="$subst_vars man8dir"
fi
if building_in dm; then
    ask "Section 5 manpage directory" man5dir /usr/share/man/man5
else
    man5dir=
    subst_vars="$subst_vars man5dir"
fi

# The paths for data are as per the FHS.  If a future version removes the
# games ghettoes of /usr/games, /var/games, etc., then a subdirectory for
# this package (/usr/share/bsdgames, /var/state/bsdgames, etc.) would be
# desirable, but I don't feel it necessary at present.

# arch-dependent data is a bad thing, and we should change the games to
# avoid it where possible, but until then this is needed.
ask "Library directory for constant data
	(architecture dependent)" usrlibdir /usr/lib/games
ask "Library directory for constant data
	(architecture independent)" sharedir /usr/share/games
ask "Library directory for variable data" varlibdir /var/games

ask_yn "Set owners/groups on installed files" do_chown y

echo
echo "See SECURITY for a discussion of security issues related to score files."
echo "There are at least two possible security policies if you want them to"
echo "work.  You can make the files world-writable, and then anyone who wants"
echo "can put anything in them, which may not be desirable if you think people"
echo "might cheat this way.  Or you can make the games that use them setgid"
echo "games, and give the files permissions 0664.  Note, however, that some"
echo "of the games may well be insecure when this is done and"
echo "malicious users may still be able to overwrite anything writable by"
echo "group games, since the games were probably not designed with security in"
echo "mind, although version 2.2 is more secure than earlier versions."
echo "The default is neither of these: it creates scorefiles with"
echo "permissions 0644 and gives the games no special privileges, which is"
echo "more secure but means that the games will fail when trying to write"
echo "to their scorefiles."

askperms "Binary" binary root root 0755
askperms "Game with scorefile" score_game root root 0755 # or root games 2755?
if building_in hunt; then
    askperms "Daemon" daemon root root 0755
fi
if building_in dm; then
    askperms "Directory for hidden games" dmdir root games 0750
    install_dmdir=`echo "$install_dmdir"| sed 's/install -c/install -d/'`
    askperms "dm" dm root games 2755
fi
askperms "Manpage" manpage root root 0644
askperms "Constant data" constdata root root 0644
askperms "Variable data" vardata root root 0644 # or 0666?

use_dot_so=
while test x$use_dot_so = x; do
    ask "Use .so or symlinks for manpages" use_dot_so .so
    case "$use_dot_so" in
        .so)
    	;;
        syml*)
    	use_dot_so=symlinks
    	;;
        *)
    	use_dot_so=
	echo "Please answer \`.so\' or \`symlinks\'"
    	;;
    esac
done
subst_vars="$subst_vars use_dot_so"

ask_yn "Gzip manpages" gzip_manpages y

# What we do with manpages is a bit complicated.  If either ppt or morse is
# being built, we must also install the bcd manpage, even if bcd isn't being
# built.  We then need to do either .so or symlink.  This should all be handled
# by the install-man.in script, but the installation of linked-to manpages
# isn't implemented yet.

# Copy install_binary to install_script
install_script="$install_binary"
subst_vars="$subst_vars install_script"

echo
echo "It is presumed in some places by the Makefiles that the compiler"
echo "will be some form of gcc."
ask "Compiler" cc gcc
ask "Optimize flags" optimize_flags "-g -O2"
echo
echo "The default warning flags should give a compile with few warnings."
# -Wbad-function-cast and -Wshadow give lots of warnings that are basically
# harmless.
# -Wwrite-strings probably needs a lot of work on the games to get const in
# where needed, but would be a good idea.
ask "Compiler warning flags" warning_flags "-Wall -W -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wcast-align -Wcast-qual"
echo
echo "You probably want the default here, or could use -lncurses_g for"
echo "debugging ncurses.  Use -lcurses -ltermcap if you want to try that,"
echo "but note that this is no longer supported and may not work."
ask "Ncurses library" ncurses_lib -lncurses
echo
echo "If you have a directory /usr/include/ncurses with the ncurses include"
echo "files in it, and the <curses.h>, <termcap.h>, etc. in /usr/include"
echo "are for BSD curses/termcap, you will need to put -I/usr/include/ncurses"
echo "here.  Otherwise (if the ncurses includes are in /usr/include), leave"
echo "this blank.  Leave it blank if /usr/include/ncurses is a symbolic link"
echo "to /usr/include."
ask "Ncurses includes" ncurses_includes ''

ask "Other CFLAGS" other_cflags ''
ask "Other LDFLAGS" other_ldflags ''

echo
echo "For some special purposes you may want to link all games with a"
echo "particular library, in addition to those they would normally be linked"
echo "with.  Unless you know you want this, you can leave it empty."
ask "Base libraries" base_libs ''

if building_in atc; then
    ask "Yacc program" yacc "bison -y"
fi
if building_in atc; then
    ask "Lex program" lex flex
    ask "Lex library" lex_lib -lfl
fi

echo
echo "You can choose the default pager for those games that use one (for"
echo "example, for viewing instructions).  This can be an absolute path,"
echo "or the name of the pager to be searched for via the PATH at runtime."
echo "All these games will also honour the PAGER environment variable if set,"
echo "in the correct (POSIX.2) way."
ask "Pager" pager /usr/bin/less

if building_in fortune; then
    echo
    echo "Fortune comes with some potentially offensive fortunes.  You should"
    echo "only install these if you are sure that your users want them."
    ask_yn "Install offensive fortunes" offensive_fortunes n
    if [ $offensive_fortunes = y ]; then
	fortune_type=real
    else
	fortune_type=fake
    fi
    subst_vars="$subst_vars fortune_type"
fi

if building_in sail; then
    echo
    echo "Sail needs its own directory it can write to for temporary files"
    echo "to synchronise among multiple players.  Note that with the"
    echo "default permissions given here this will not work: you may want"
    echo "to choose permissions appropriate to the security policy you are"
    echo "using.  It may be more secure if this directory is not world"
    echo "accessible (e.g. mode 2770)."
    ask "Directory for sail temporary files" sail_dir "$varlibdir/sail"
    askperms "Sail directory" sail_dir root root 0750
    install_sail_dir=`echo "$install_sail_dir" |sed 's/install -c/install -d/'`
fi

echo
echo "You can configure the exact names used for data files by various"
echo "of the games.  Most probably the defaults are OK."
game_ask atc "Directory for atc static data" atc_dir "$sharedir/atc"
game_ask atc "Score file for atc" atc_scorefile "$varlibdir/atc_score"
game_ask battlestar "Score file for battlestar" battlestar_scorefile "$varlibdir/battlestar.log"
# Bog has some other configuration
game_ask boggle "Directory for boggle static data" boggle_dir "$sharedir/boggle"
game_ask canfield "Score file for canfield" canfield_scorefile "$varlibdir/cfscores"
game_ask cribbage "File for cribbage instructions" cribbage_instrfile "$sharedir/cribbage.instr"
game_ask cribbage "Score file for cribbage" cribbage_scorefile "$varlibdir/criblog"
game_ask dm "Configuration file for dm" dm_configfile /etc/dm.conf
game_ask dm "File to disable games playing" dm_nogamesfile /etc/nogames
game_ask dm "Log file for dm" dm_logfile "$varlibdir/games.log"
game_ask fish "File for fish instructions" fish_instrfile "$sharedir/fish.instr"
game_ask hangman "Words file for hangman" hangman_wordsfile "$sharedir/hangman-words"
# Hunt has some other configuration
game_ask monop "File for monop cards" monop_cardsfile "$usrlibdir/monop-cards.pck"
game_ask phantasia "Directory for phantasia variable data" phantasia_dir "$varlibdir/phantasia"
game_ask quiz "Directory for quiz static data" quiz_dir "$sharedir/quiz"
game_ask robots "Score file for robots" robots_scorefile "$varlibdir/robots_roll"
game_ask rogue "Score file for rogue" rogue_scorefile "$varlibdir/rogue.scores"
game_ask sail "Score file for sail" sail_scorefile "$varlibdir/saillog"
game_ask snake "Score file for snake" snake_scorefile "$varlibdir/snake.log"
game_ask snake "Raw score file for snake" snake_rawscorefile "$varlibdir/snakerawscores"
game_ask tetris "Score file for tetris" tetris_scorefile "$varlibdir/tetris-bsd.scores"
game_ask wump "File for wump info" wump_infofile "$sharedir/wump.info"

# Generate simplistic substitution script.
# This does not allow escaped @s in the substituted file, will fail on
# newline or % in filenames, etc..  The justification is that proper insertion
# of arbitrary 8-bit data in different files requires too much knowledge
# of escapes specific to the particular file type, so these things would
# probably fail anyway.
: >subst.sed
for var in $subst_vars; do
    eval echo \""s%@$var@%\$$var%g"\" >> subst.sed
done

substitute () {
    for file in "$@"; do
	dir="${file%%/*}"
	if building_in $dir || [ "$file" = "$dir" ]; then
	    source_file="${file}.in"
	    echo "Extracting $file from $source_file"
	    cp "$source_file" "$file" # set permissions
	    case "$file" in
	    (Makeconfig)
		echo "# Automatically generated by configure from $source_file.  Do not edit." >"$file"
		;;
	    (*.[1-9])
		echo ".\\\" Automatically generated by configure from $source_file.  Do not edit." >"$file"
		;;
	    (*.[ch])
		echo "/* Automatically generated by configure from $source_file.  Do not edit. */" >"$file"
		;;
	    (*)
		echo "#!/bin/sh" >"$file"
		echo "# Automatically generated by configure from $source_file.  Do not edit." >>"$file"
		;;
	    esac
	    sed -f subst.sed <"$source_file" >>"$file"
	fi
    done
}

subst_files="`cat substfiles`"

substitute $subst_files

# Now we want to create the main GNUmakefile that includes the subdirectory
# fragments and all the necessary dependencies.  This may take some time.

echo "Generating the main GNUmakefile, please wait..."

prog_to_exec () {
    if [ "x$(dirname $1)" = x. ]; then
	echo "$1/$1"
    else
	echo "$1"
    fi
}

slash_to_under () {
    echo "$1" |sed 's:/:_:g'
}

exec_to_libs () {
    eval echo \$$(slash_to_under $1)_libs
}

exec_to_objs () {
    eval echo \$$(slash_to_under $1)_objs
}

make_dirs_tmp="$(find $build_dirs -depth -type d) lib"

make_dirs=

for dir in $make_dirs_tmp; do
    if [ -e $dir/Makefrag ]; then
	make_dirs="$make_dirs $dir"
    fi
done

all_dependencies=

for dir in $make_dirs; do
    udir=$(slash_to_under $dir)
    all_dependencies="$all_dependencies ${udir}_all"
done

cat >GNUmakefile <<EOF
# GNUmakefile - automatically generated by configure.  Do not edit.

# No suffix rules
.SUFFIXES:

# Include configuration
include Makeconfig

.PHONY:	all $all_dependencies
all:	$all_dependencies

EOF

for dir in $make_dirs; do
    udir=$(slash_to_under $dir)
    eval clean_$udir=
    cat >>GNUmakefile <<EOF
include $dir/Makefrag

$dir/%.o:	$dir/%.c
	\$(CC) \$(CFLAGS) \$(${udir}_CFLAGS) \$(${udir}_DEFS) \$(BASE_INCS) -I$dir \$(${udir}_INCS) -c \$< -o \$@

$dir/%.i:	$dir/%.c
	\$(CC) \$(CFLAGS) \$(${udir}_CFLAGS) \$(${udir}_DEFS) \$(BASE_INCS) -I$dir \$(${udir}_INCS) -E \$< -o \$@

$dir/%.s:	$dir/%.c
	\$(CC) \$(CFLAGS) \$(${udir}_CFLAGS) \$(${udir}_DEFS) \$(BASE_INCS) -I$dir \$(${udir}_INCS) -S -fverbose-asm \$< -o \$@

$dir/%.d:	$dir/%.c
	./mkdep \$< \$@ \$(CC) \$(CFLAGS) \$(${udir}_CFLAGS) \$(${udir}_DEFS) \$(BASE_INCS) -I$dir \$(${udir}_INCS)

EOF
done

while read prog libs; do
    if ! building_in ${prog%%/*}; then
	continue
    fi
    exec=$(prog_to_exec $prog)
    evar=$(slash_to_under $exec)_libs
    eval $evar=\"\$libs\"
done <exec.libs

while read prog objs; do
    if ! building_in ${prog%%/*}; then
	continue
    fi
    exec=$(prog_to_exec $prog)
    evar=$(slash_to_under $exec)_libs
    eval libs=\"\$$evar\"
    dir=$(dirname $exec)
    udir=$(slash_to_under $dir)
    nobjs=
    deps_to_inc=
    eval clean_$udir=\"\$clean_$udir $(basename $exec)\"
    for obj in $objs; do
	if [ "x$(dirname $obj)" = x. ]; then
	    obj=$dir/$obj
	fi
	nobjs="$nobjs $obj"
	obj_dep_var=$(slash_to_under $obj)
	obj_dep_var=${obj_dep_var%%.o}_deps_included
	eval obj_dep_val=\$$obj_dep_var
	if [ "x$obj_dep_val" = "x" ]; then
	    deps_to_inc="$deps_to_inc ${obj%%.o}.d"
	    eval $obj_dep_var=y
	fi
    done
    cat >>GNUmakefile <<EOF
ifneq (\$(nodep),true)
include $deps_to_inc
endif

$exec:	$nobjs
	\$(CC) \$(LDFLAGS) \$^ $libs \$(BASE_LIBS) -o \$@

EOF
done <exec.objs

clean_dependencies=
install_dependencies=

for dir in $make_dirs; do
    udir=$(slash_to_under $dir)
    clean_dependencies="$clean_dependencies ${udir}_clean"
    install_dependencies="$install_dependencies ${udir}_install"
    eval clean=\"\$clean_$udir\"
    cat >>GNUmakefile <<EOF
.PHONY:	${udir}_clean
${udir}_clean:
	cd $dir && rm -f -- a.out core *.o *.d *.i *.s *.d.tmp $clean \$(${udir}_CLEANFILES)

.PHONY:	${udir}_install ${udir}_install-strip ${udir}_installdirs
${udir}_install:	${udir}_installdirs

${udir}_install-strip:
	\$(MAKE) ${udir}_install \$(DEFS_TO_PASS_STRIP)

${udir}_installdirs:
	set -e; for d in \$(${udir}_DIRS) /; do mkdir -p \$(INSTALL_PREFIX)\$\$d; done

EOF
done

cat >>GNUmakefile <<EOF
.PHONY:	clean mostlyclean distclean maintainer-clean
clean mostlyclean:	$clean_dependencies

distclean maintainer-clean:	clean
	rm -f subst.sed
	rm -f \`cat substfiles\`
	rm -f GNUmakefile

.PHONY:	install install-strip

install:	$install_dependencies

install-strip:
	\$(MAKE) install \$(DEFS_TO_PASS_STRIP)

# Standard GNU targets we don't support
.PHONY:	uninstall TAGS dist
uninstall TAGS dist:
	@echo "The GNU target \\\`\$@' is not supported by this package." >&2; exit 1

# GNU targets that can do nothing
.PHONY:	info dvi
info dvi:
	@echo "This package comes with no Texinfo documentation."

EOF

# We can `make GAME_check' for the following games, but no longer have
# a top level target:
# bcd factor morse pig primes number pom ppt wargames
# If we put in a top level target again, it should compare against known good
# output.