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:
# NAME:
#	boot-strap
#
# SYNOPSIS:
#	boot-strap ["options"]
#	boot-strap --prefix=/opt --install
#	boot-strap --prefix=$HOME --install-host-target -DWITH_PROG_VERSION
#	boot-strap ["options"] op=build
#	boot-strap ["options"] op=install
#
# DESCRIPTION:
#	This script is used to configure/build bmake it builds for
#	each host-target in a different subdir to keep the src clean.
#	There is no requirement for an existing make(1).
#
#	On successful completion if no '--install' flag is given,
#	it echos a command to do installation.
#
#	The variable "op" defaults to 'all', and is affected by
#	'--install' flag as above.
#	Other values include:
#
#	configure
#		Just run 'configure'
#
#	build
#		If 'configure' has not been done, do it, then
#		run the build script, and finally 'test'.
#
#	install
#		If 'build' has not been done, do it, 'test' then
#		install. 
#
#	clean
#		attempt to clean up
#
#	test
#		run the unit-tests.  Done automatically after 'build'
#		and before 'install'.
#
#	The above are leveraged by a trivial makefile for the benefit
#	of those that have './configure; make; make install' baked
#	into them.
#	
#	Options:
#
#	-c "rc"
#		Pick up settings from "rc".  
#		We look for '.bmake-boot-strap.rc' before processing
#		options (unless SKIP_RC is set in environment).
#
#	--share "share_dir"
#		Where to put man pages and mk files.
#		If $prefix ends in $HOST_TARGET, and $prefix/../share
#		exits, the default will be that rather than $prefix/share.
#
#	--mksrc "mksrc"
#		Indicate where the mk files can be found.
#		Default is $Mydir/mk
#
#	--install
#		If build and test work, run bmake install.
#		BINDIR=$prefix/bin
#		SHAREDIR=$prefix/share
#
#	--install-host-target
#		As for '--install' but BINDIR=$prefix/$HOST_TARGET/bin
#		This is useful when $prefix/ is shared by multiple
#		machines.
#
#	Flags relevant when installing:
#
#	-DWITHOUT_INSTALL_MK
#		Skip installing mk files.
#		By default they will be installed to $prefix/share/mk
#
#	-DWITH_PROG_VERSION
#		Install 'bmake' as 'bmake-$MAKE_VERSION'
#		A symlink will be made as 'bmake' unless
#		-DWITHOUT_PROG_LINK is set.
#
#	Possibly useful configure_args:
#
#	--without-meta
#		disable use of meta mode.
#
#	--without-filemon
#		disable use of filemon(9) which is currently only
#		available for NetBSD and FreeBSD.
#
#	--with-filemon="path/to/filemon.h"
#		enables use of filemon(9) by meta mode.
#		
#	--with-machine="machine"
#		set "machine" to override that determined by
#		machine.sh
#	
#	--with-force-machine="machine"
#		force "machine" even if uname(3) provides a value.
#
#	--with-machine_arch="machine_arch"
#		set "machine_arch" to override that determined by
#		machine.sh
#
#	--with-default-sys-path="syspath"
#		set an explicit default "syspath" which is where bmake
#		will look for sys.mk and friends.
#
# AUTHOR:
#	Simon J. Gerraty <sjg@crufty.net>

# RCSid:
#	$Id: boot-strap,v 1.42 2013/01/25 20:20:33 sjg Exp $
#
#	@(#) Copyright (c) 2001 Simon J. Gerraty
#
#	This file is provided in the hope that it will
#	be of use.  There is absolutely NO WARRANTY.
#	Permission to copy, redistribute or otherwise
#	use this file is hereby granted provided that 
#	the above copyright notice and this notice are
#	left intact. 
#      
#	Please send copies of changes and bug-fixes to:
#	sjg@crufty.net
#

Mydir=`dirname $0`
. "$Mydir/os.sh"
case "$Mydir" in
/*) ;;
*) Mydir=`cd "$Mydir" && 'pwd'`;;
esac

Usage() {
	[ "$1" ] && echo "ERROR: $@" >&2
	echo "Usage:" >&2
	echo "$0 [--<configure_arg> ...][<prefix>][--install]" >&2
	exit 1
}

Error() {
	echo "ERROR: $@" >&2
	exit 1
}

source_rc() {
	rc="$1"; shift
	for d in ${*:-""}
	do
		r="${d:+$d/}$rc"
		[ -f "$r" -a -s "$r" ] || continue
		echo "NOTE: reading $r"
		. "$r"
		break
	done
}

cmd_args="$@"

# --install[-host-target] will set this
INSTALL_PREFIX=
# other things we pass to install step
INSTALL_ARGS=
CONFIGURE_ARGS=
MAKESYSPATH=
# pick a useful default prefix (for me at least ;-)
for prefix in /opt/$HOST_TARGET "$HOME/$HOST_TARGET" /usr/pkg /usr/local ""
do
	[ -d "${prefix:-.}" ] || continue
	case "$prefix" in
	*/$HOST_TARGET)
		p=`dirname $prefix`
		if [ -d $p/share ]; then
			INSTALL_BIN=$HOST_TARGET/bin
			prefix=$p
		fi
		;;
	esac
        echo "NOTE: default prefix=$prefix ${INSTALL_BIN:+INSTALL_BIN=$INSTALL_BIN}"
	break
done
srcdir=$Mydir
mksrc=$Mydir/mk
objdir=
quiet=:

${SKIP_RC:+:} source_rc .bmake-boot-strap.rc . "$Mydir/.." "$HOME"

get_optarg() {
	expr "x$1" : "x[^=]*=\\(.*\\)"
}

here=`'pwd'`
if [ $here = $Mydir ]; then
   # avoid polution
   OBJROOT=../
fi

op=all
BMAKE=

while :
do
	case "$1" in
	--) shift; break;;
        --help) sed -n -e "1d;/RCSid/,\$d" -e '/^#\.[a-z]/d' -e '/^#/s,^# *,,p' $0; exit 0;;
	--prefix) prefix="$2"; shift;;
	--prefix=*) prefix=`get_optarg "$1"`;;
	--src=*) srcdir=`get_optarg "$1"`;;
	--with-mksrc=*|--mksrc=*) mksrc=`get_optarg "$1"`;;
	--share=*) share_dir=`get_optarg "$1"`;;
	--share) share_dir="$2"; shift;;
	--with-default-sys-path=*)
	    CONFIGURE_ARGS="$1"
	    MAKESYSPATH=`get_optarg "$1"`;;
	--with-default-sys-path)
	    CONFIGURE_ARGS="$1 $2"
	    MAKESYSPATH="$2"; shift;;
	--install) INSTALL_PREFIX=${INSTALL_PREFIX:-$prefix};;
	--install-host-target)
                INSTALL_PREFIX=${INSTALL_PREFIX:-$prefix}
                INSTALL_BIN=$HOST_TARGET/bin;;
	--install-destdir=*) INSTALL_DESTDIR=`get_optarg "$1"`;;
	--install-prefix=*) INSTALL_PREFIX=`get_optarg "$1"`;;
	-DWITH*) INSTALL_ARGS="$INSTALL_ARGS $1";;
	-s|--src) srcdir="$2"; shift;;
	-m|--mksrc) mksrc="$2"; shift;;
	-o|--objdir) objdir="$2"; shift;;
	-q) quiet=;;
	-c) source_rc "$2"; shift;;
	--*) CONFIGURE_ARGS="$CONFIGURE_ARGS $1";;
	*=*) eval "$1"; export `expr "x$1" : "x\\(.[^=]*\\)=.*"`;;
	*) break;;
	esac
        shift
done

AddConfigure() {
	case " $CONFIGURE_ARGS " in
	*" $1"*) ;;
	*) CONFIGURE_ARGS="$CONFIGURE_ARGS $1$2";;
	esac
}

GetDir() {
	match="$1"
	shift
	fmatch="$1"
	shift
	for dir in $*
	do
		[ -d "$dir" ] || continue
		case "/$dir/" in
		*$match*) ;;
		*) continue;;
		esac
		case "$fmatch" in
		.) ;;
		*) [ -s $dir/$fmatch ] || continue;;
		esac
		case "$dir/" in
		*./*) cd "$dir" && 'pwd';;
		/*) echo $dir;;
		*) cd "$dir" && 'pwd';;
		esac
		break
	done
}

FindHereOrAbove() {
    (
	_t=-s
	while :
	do
		case "$1" in
		-C) cd "$2"; shift; shift;;
		-?) _t=$1; shift;;
		*) break;;
		esac
	done
	case "$1" in	
	/*)	# we shouldn't be here
		[ $_t "$1" ] && echo "$1"
		return
		;;
	.../*) want=`echo "$1" | sed 's,^.../*,,'`;;
	*) want="$1";;
	esac
	here=`'pwd'`
	while :
	do
		if [ $_t "./$want" ]; then
			echo "$here/$want"
			return
		fi
		cd ..
		here=`'pwd'`
		case "$here" in
		/) return;;
		esac
	done
    )
}

# is $1 missing from $2 (or PATH) ?
no_path() {
	eval "__p=\$${2:-PATH}"
	case ":$__p:" in *:"$1":*) return 1;; *) return 0;; esac
}

# if $1 exists and is not in path, append it
add_path () {
	case "$1" in
	-?) t=$1; shift;;
	*) t=-d;;
	esac
	case "$2,$1" in
	MAKESYSPATH,.../*) ;;
	*) [ $t ${1:-.} ] || return;;
	esac
	no_path $* && eval ${2:-PATH}="$__p${__p:+:}$1"
}


srcdir=`GetDir /bmake make-bootstrap.sh.in "$srcdir" "$2" "$Mydir" ./bmake* "$Mydir"/../bmake*`
[ -d "${srcdir:-/dev/null}" ] || Usage
case "$mksrc" in
none|-) # we don't want it
	mksrc=
	;;
.../*)	# find here or above
	mksrc=`FindHereOrAbove -C "$Mydir" -s "$mksrc/sys.mk"`
	# that found a file
	mksrc=`dirname $mksrc`
	;;
*)	# guess we want mksrc...
	mksrc=`GetDir /mk sys.mk "$mksrc" "$3" ./mk* "$srcdir"/mk* "$srcdir"/../mk*`
	[ -d "${mksrc:-/dev/null}" ] || Usage "Use '-m none' to build without mksrc"
	;;
esac

# Ok, get to work...
objdir="${objdir:-$OBJROOT$HOST_TARGET}"
[ -d "$objdir" ] || mkdir -p "$objdir"
[ -d "$objdir" ] || mkdir "$objdir"
cd "$objdir" || exit 1
# make it absolute
objdir=`'pwd'`

ShareDir() {
	case "/$1" in
	/) [ -d /share ] || return;;
	*/$HOST_TARGET)
		if [ -d "$1/../share" ]; then
			echo `dirname "$1"`/share
			return
		fi
		;;
	esac
	echo $1/share
}

# make it easy to force prefix to use $HOST_TARGET
: looking at "$prefix"
case "$prefix" in
*/host?target) prefix=`echo "$prefix" | sed "s,host.target,${HOST_TARGET},"`;;
esac

share_dir="${share_dir:-`ShareDir $prefix`}"

AddConfigure --prefix= "$prefix"
case "$CONFIGURE_ARGS" in
*--with-*-sys-path*) ;; # skip
*) [ "$share_dir" ] && AddConfigure --with-default-sys-path= "$share_dir/mk";;
esac
if [ "$mksrc" ]; then
        AddConfigure --with-mksrc= "$mksrc"
        # not all cc's support this
        CFLAGS_MF= CFLAGS_MD=
        export CFLAGS_MF CFLAGS_MD
fi

# this makes it easy to run the bmake we just built
# the :tA dance is needed because 'pwd' and even /bin/pwd
# may not give the same result as realpath().
Bmake() {
    (
	    cd $Mydir &&
	    MAKESYSPATH=$mksrc SRCTOP=$Mydir OBJTOP=$objdir \
	    MAKEOBJDIR='${.CURDIR:S,${SRCTOP:tA},${OBJTOP:tA},}' \
	    ${BMAKE:-$objdir/bmake} -f $Mydir/Makefile "$@"
    )
}

# make sure test below uses the same diff that configure did
TOOL_DIFF=`type diff | sed 's,[()],,g;s,^[^/][^/]*,,;q'`
export TOOL_DIFF

op_configure() {
	$srcdir/configure $CONFIGURE_ARGS || exit 1
}

op_build() {
	[ -s make-bootstrap.sh ] || op_configure
	chmod 755 make-bootstrap.sh || exit 1
	./make-bootstrap.sh || exit 1
	case "$op" in
	build) op_test;;
	esac
}

op_test() {
	[ -x bmake ] || op_build
	Bmake test || exit 1
}

op_clean() {
	if [ -x bmake ]; then
		ln bmake bmake$$
		BMAKE=$objdir/bmake$$ Bmake clean
		rm -f bmake$$
	elif [ $objdir != $srcdir ]; then
		rm -rf *
	fi
}

op_install() {
	op_test
	case "$INSTALL_PREFIX,$INSTALL_BIN,$prefix" in
	,$HOST_TARGET/bin,*/$HOST_TARGET)
		INSTALL_PREFIX=`dirname $prefix`
		;;
	esac
	INSTALL_PREFIX=${INSTALL_PREFIX:-$prefix}
	Bmake install prefix=$INSTALL_PREFIX BINDIR=$INSTALL_PREFIX/${INSTALL_BIN:-bin} ${INSTALL_DESTDIR:+DESTDIR=$INSTALL_DESTDIR} $INSTALL_ARGS || exit 1
}

op_all() {
	rm -f make-bootstrap.sh bmake *.o
	if [ -n "$INSTALL_PREFIX" ]; then
		op_install
	else
		op_test
		MAKE_VERSION=`sed -n '/^MAKE_VERSION/ { s,.*=  *,,;p; }' $srcdir/Makefile`
		echo You can install by running:
		echo
		echo $0 $cmd_args op=install
		echo
		echo "Use --install-prefix=/something to install somewhere other than $prefix"
		echo "Use --install-destdir=/somewhere to set DESTDIR during install"
		echo "Use --install-host-target to use INSTALL_BIN=$HOST_TARGET/bin"
		echo "Use -DWITH_PROG_VERSION to install as bmake-$MAKE_VERSION"
		echo "Use -DWITHOUT_PROG_LINK to supress bmake -> bmake-$MAKE_VERSION symlink"
		echo "Use -DWITHOUT_INSTALL_MK to skip installing files to $prefix/share/mk"
	fi
}

op_$op
exit 0