#!/bin/sh
# @(#)src-get  1.18 05/07/07 Copyright 2005 J. Schilling
###########################################################################
# Written 2005 by J. Schilling
###########################################################################
# A source package controlling system which should behave similar to
# the Debian apt-get command.
###########################################################################
# The contents of this file are subject to the terms of the
# Common Development and Distribution License, Version 1.0 only.
# (the "License").  You may not use this file except in compliance
# with the License.
#
# See the file CDDL.Schily.txt in this distribution for details.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file CDDL.Schily.txt from this distribution.
###########################################################################

#
# Set up server URL for package description files.
# Must have a slash at the end.
#
server_url=http://sps.berlios.de/pkg/testing/

#
# If you do not have write access to a server, you may set up a local copy
#
#server_url=file:///tmp/pkg/

#
# Set up default pager.
#
PAGER=${PAGER-more}

#
# Set up default wget.
#
WGET=${WGET-sh_wget}

case $PATH in
	*/usr/sfw/bin*)
		;;
	*)
		if [ -d /usr/sfw/bin ]; then
			XPATH=/usr/sfw/bin:${XPATH-}
		fi
		;;
esac

PATH=${XPATH-}${PATH}

usage() {
	echo "Usage: src-get [cmd] [target]..."
	echo "Possible commands are:"
	echo "	init	initialize skeleton makefile system in empty directory"
	echo "	setup	setup platform dependent build commands in bins/<archdir>/*"
	echo "	install	install a source package"
	echo "	list	list installable packages"
	echo "	shell	start a SHELL with a clean environment"
	echo "	compile	do a full compilation from SRCROOT with a clean environment"
}

if [ $# -lt 1 ]; then
	usage
	exit 1
fi
cmd=$1
shift

echo "cmd:  $cmd"
echo "args: $@"

excode=255
trap 'rm -rf /tmp/.d.$$; if [ -f ./$do_wget_file ]; then rm -f ./$do_wget_file; fi; exit 1' 1 2 15
trap 'rm -rf /tmp/.d.$$; exit $excode' 0

ZIP_SUFFIX=
ZIP=cat
UNZIP=cat

if bzip2 --help > /dev/null 2>&1; then
	UNZIP="bzip2 -d"
	ZIP=bzip2
	ZIP_SUFFIX=.bz2
elif gzip --help > /dev/null 2>&1; then
	UNZIP="gzip -d"
	ZIP=gzip
	ZIP_SUFFIX=.gz
fi

get_srcroot() {
	SRCROOT=.
	loop=1
	while [ $loop -lt 100 ]; do
		if [ ! -d $SRCROOT ]; then
			# Abort on ENAMETOOLONG
			break
		fi
		if [ -r $SRCROOT/RULES/rules.top ]; then
			break
		fi
		if [ "$SRCROOT" = . ]; then
			SRCROOT=".."
		else
			SRCROOT="$SRCROOT/.."
		fi
		loop="`expr $loop + 1`"
	done
	if [ ! -r $SRCROOT/RULES/rules.top ]; then
		echo "Cannot find SRCROOT directory" 1>&2
		return 1
	fi
	return 0
}

cd_srcroot() {
	if [ ".$SRCROOT" = ".$NO_SRCROOT" ]; then
		echo "SRCROOT not known."			1>&2
		exit 1
	fi
	cd "$SRCROOT" || (echo "Cannot chdir to $SRCROOT"	1>&2; exit 1)
	SRCROOT=.
}

set_binspath() {
	PWD=`pwd`
	if [ "$SRCROOT" = . ];then
		PATH="${PWD}/${BINS}:${PATH}"
	else
		PATH="${PWD}/${SRCROOT}/${BINS}:${PATH}"
	fi
	export PATH
	unset PWD
}

get_bins() {
	if [ ".$SRCROOT" = ".$NO_SRCROOT" ]; then
		return 1
	fi
	OARCH=`${SRCROOT}/conf/oarch.sh`
	BINS=bins/"$OARCH"
}

need_mfs() {
	if [ ! -r ${SRCROOT}/RULES/rules.top ]; then
		echo "A makefile system is not installed."	1>&2
		echo "Run 'src-get init' first."		1>&2
		exit 1
	fi
}

check_bins() {
	if [	-r ${SRCROOT}/${BINS}/bzip2 -a	\
		-r ${SRCROOT}/${BINS}/gzip -a	\
		-r ${SRCROOT}/${BINS}/lndir -a	\
		-r ${SRCROOT}/${BINS}/patch -a	\
		-r ${SRCROOT}/${BINS}/smake -a	\
		-r ${SRCROOT}/${BINS}/star -a	\
		-r ${SRCROOT}/${BINS}/wget	]; then
			if [ "$WGET" = sh_wget ]; then
				WGET="wget --passive-ftp"
			fi
			return 0
	fi
	return 1
}

need_bins() {
	need_mfs
	get_bins
	if check_bins; then
		return 0
	else
		echo "Setup for $OARCH not yet done."	1>&2
		echo "Run 'src-get setup' first."	1>&2
		exit 1
	fi
}


sh_wget() {
	excode=255

	if [ $# -lt 1 ]; then
		echo "Usage: wget.sh URL"			1>&2
		echo "Only ftp:// type URLs are supported"	1>&2
		return 1
	fi

	wget_url="$1"
	wget_rest=`echo "$wget_url" | sed -e 's,^ftp://,,'`
	if [ "$wget_url" = "$wget_rest" ]; then
		echo "Unsupported protocol in" "$wget_url"	1>&2
		return 1
	fi
	wget_host=`echo "$wget_rest" | sed -e 's,/.*,,'`
	wget_file=`echo "$wget_rest" | sed -e 's,^[^/]*/,,'`
	wget_dname=`echo "$wget_file" | sed -e 's,[^/]*$,,;s,/$,,;s,^$,.,'`
	wget_fname=`echo "$wget_file" | sed -e 's,.*/,,'`

	mkdir /tmp/.d.$$
	cat <<-	EOF > /tmp/.d.$$/.netrc
		machine "$wget_host"  login ftp password wget.sh@Makefiles.Schily.build
	EOF
	chmod 600 /tmp/.d.$$/.netrc

	HOME=/tmp/.d.$$ ftp "$wget_host" <<- EOF
		bin
		passive on
		cd "$wget_dname"
		dir "$wget_fname"
		hash on
		verbose on
		get "$wget_fname"
		bye
	EOF
	excode=$?
	rm -fr /tmp/.d.$$
	return $excode
}

do_wget() {
	do_wget_url="$1"
	case "$1" in
	file:///*)
		do_wget_rest=`echo "$do_wget_url" | sed -e 's,^file://,,'`
		do_wget_file=`echo "$do_wget_url" | sed -e 's,.*/,,'`
		rm -rf "$do_wget_file"
		cp "$do_wget_rest" "$do_wget_file"
		return $?
		;;
	esac
	loop=0
	wget_retries=10
	while [ $loop -lt $wget_retries ]; do
		do_wget_file=`echo "$do_wget_url" | sed -e 's,.*/,,'`
		rm -rf "$do_wget_file"
		$WGET "$do_wget_url"

		if [ -f "$do_wget_file" ]; then
			break
		fi
		echo
		echo Retrying in 10 seconds
		sleep 10
		loop="`expr $loop + 1`"
	done
	if [ $loop -ge $wget_retries ]; then
		echo "Wget retry count exhausted - giving up."	1>&2
		exit 1
	fi
	do_wget_file=
}

get_catalog() {
	mkdir -p src-list
	cd src-list
	rm -f catalog
	do_wget ${server_url}catalog
	cd ..
}

do_dep() {
	deps="$@"

	if [ ."$@" = . ]; then
		return
	fi
	echo "Fetching dependencies: $deps"
	$0 install $deps
}

do_patch() {
	(
		cd $1
		if [ -r patches/patch.sh ]; then
			patches/patch.sh
		fi
	)
}

do_install() {
	target="$1"
	echo "Searching for target:" $target
	mkdir -p src-list
	cd src-list
	# target already installed?
	#rm $target
	TGT=`grep "$target" < ../src-list/catalog`
	#echo TGT $TGT
	nmatches=`echo "$TGT" | wc -w`
	#echo MATCHES $nmatches
	if [ $nmatches = 0 ]; then
		echo "No matching source for" $target
		exit
	fi
	if [ $nmatches -gt 1 ]; then
		echo "Too many matching sources for" $target
		echo "Select one from:" $TGT
		exit
	fi
	echo "Matching target:     " "$TGT"
	#
	# Retrieve Target desciption file that contains:
	#
	#	PKG=	The URL of the tar archive containing the wrappers
	#	DIR=	The directory in local tree where to put the target dir
	#	URL=	The URL where to fetch the source from upstream
	#	DEP=	A list of package names the current target depends on
	#
	do_wget ${server_url}"$TGT"
	PKG=
	DIR=
	URL=
	DEP=
	. ./$TGT
	echo PKG "'$PKG'"
	echo DIR "'$DIR'"
	echo URL "'$URL'"
	echo DEP "'$DEP'"
	do_dep "$DEP"

	if [ ."$URL" = . ]; then
		return
	fi
	do_wget ${server_url}"$PKG"
	cd ..
	pkg_fname=`echo "$PKG" | sed -e 's,.*/,,'`
	url_fname=`echo "$URL" | sed -e 's,.*/,,'`
	conf/mkdir.sh -p -T "$DIR"/"$TGT"
	star -x -C "$DIR" < src-list/"$pkg_fname"
	(cd "$DIR"/"$TGT" && ( do_wget $URL; star -x < "$url_fname" ) )
	do_patch "$DIR"/"$TGT"
}

NO_SRCROOT=no-SRCROOT-directory-found
if get_srcroot; then
	echo SRCROOT: $SRCROOT
else
	SRCROOT="$NO_SRCROOT"
fi

case $cmd in

	init)	
			if [ -r RULES/rules.top ]; then
				echo "A makefile system is already installed in the current directory."	1>&2
				exit 1
			fi
			if [ ! -z "`ls`" ]; then
				echo "Current directory not empty."		1>&2
				echo "Will not install makefile system."	1>&2
				exit 1
			fi
			do_wget ftp://ftp.berlios.de/pub/makefiles/testing/makefiles.tar${ZIP_SUFFIX}
			${UNZIP} < makefiles.tar${ZIP_SUFFIX} | tar xf -
			#
			# tar on HP-UX-10.x does not like tar xpf
			#
			if [ ! -r RULES/rules.top ]; then
				echo "The installation of the makefile system did fail."		1>&2
				exit 1
			fi
			echo
			echo "*********"
			echo "The installation of Makefiles was successful."
			echo
			echo "Do not forget to run 'src-get setup' for all platforms."
			echo "*********"
			echo
			exit
			;;

	setup)
			need_mfs
			# $BINS not set up
			#
			if [ ! -r RULES/rules.top ]; then
				echo "A makefile system is not installed in the current directory."	1>&2
				echo "Run 'src-get init' first"						1>&2
				exit 1
			fi
			sh conf/setup.sh
			;;

	list)
			need_bins
			set_binspath
			cd_srcroot
			get_catalog
			$PAGER src-list/catalog
			;;

	install)
			need_bins
			set_binspath
			cd_srcroot
			get_catalog
			for i in "$@"; do
				echo $i
				do_install "$i"
			done
			;;

	shell)
			need_bins
			unset LD_LIBRARY_PATH
			unset LD_RUN_PATH
			SHELL=${SHELL-/bin/sh}
			set_binspath
			echo "Note that 'smake' is the preferred make program."
			echo "Starting ${SHELL}..."
			exec ${SHELL}
			echo "Cannot exec ${SHELL}"	1>&2
			exit 1
			;;

	compile)
			need_bins
			unset LD_LIBRARY_PATH
			unset LD_RUN_PATH
			SHELL=${SHELL-/bin/sh}
			set_binspath
			cd_srcroot
			echo "Starting compilation..."
			exec smake "$@"
			echo "Cannot exec smake $@"	1>&2
			exit 1
			;;

	-help|*)	echo "@(#)src-get  1.18 05/07/07 Copyright 2005 J. Schilling"
			usage
			exit 0
			;;
esac