#!/bin/sh -e

fetch() {
	for s in $source; do
		filename=${s##*/}
		if [ "$s" != "$filename" ]; then
			if [ ! -f $SRCDIR/$filename ]; then
				echo "fetching $s"
				curl -C - -L --fail --ftp-pasv --retry 999 --retry-delay 3 -o $SRCDIR/$filename.part $s && \
					mv $SRCDIR/$filename.part $SRCDIR/$filename || {
						echo "failed fetch $s"
						exit 1
					}
			fi
		fi
	done
}

unpack() {
	rm -fr "$WORKDIR/$pkg"
	mkdir -p "$WORKDIR/$pkg"
	for src in $source; do
		filename=${src##*/}
		case $src in
			*.tar|*.tar.gz|*.tar.Z|*.tgz|*.tar.bz2|*.tbz2|*.tar.xz|*.txz|*.tar.lzma|*.zip)
				echo "extracting $filename..."
				tar -xf "$SRCDIR/$filename" -C "$WORKDIR/$pkg" || {
					echo "failed extracting $filename"
					exit 1
				};;
		esac
	done
}

buildtc() {
	cd $WORKDIR/$name
	(set -e -x; build)
	if [ $? -ne 0 ]; then
		echo "!!! build $name-$version failed !!!"
		exit 1
	else
		echo "--- build $name-$version success ---"
	fi
	[ "$name" ] && rm -fr $WORKDIR/$name
	echo $name-$version > $LFS/tools/$(basename $script)
}

checkdone() {
	if [ -e $LFS/tools/$(basename $script) ]; then
		echo "*** skip $(basename $script) ***"
		return 1
	else
		echo ">>> building $(basename $script) <<<"
		return 0
	fi
}

build() {
	:
}

main() {
	for script in $TCDIR/[0-9][0-9]-*; do
		checkdone || continue
		cd $CWD
		. $script
		pkg=$name
		fetch
		unpack
		buildtc
		unset source name version build
		#build_stage1 $script
	done
}

if [ $(id -u) = 0 ]; then
	echo "$0 script need to run as regular user!"
	exit 1
fi

CWD=$PWD

if [ -f $CWD/config ]; then
	. $CWD/config
fi

PATH=/tools/bin:/bin:/usr/bin

TCDIR=$CWD/toolchain
PATCHDIR=$CWD/patches
FILEDIR=$CWD/files

LFS_TGT=x86_64-lfs-linux-gnu
LFS_TGT32=i686-lfs-linux-gnu

MAKEFLAGS="${MAKEFLAGS:--j$(nproc)}"
LFS="${LFS:-$CWD/lfs-rootfs}"
PKGDIR="${PKGDIR:-$CWD/pkg}"
SRCDIR="${SRCDIR:-$CWD/src}"
WORKDIR="${WORKDIR:-$CWD/work}"
CFLAGS="${CFLAGS:--O2 -march=x86-64 -pipe}"

export LC_ALL=C PATH MAKEFLAGS LFS LFS_TGT LFS_TGT32

mkdir -p $SRCDIR $PKGDIR $WORKDIR

if [ ! -d $LFS/tools ]; then
	mkdir -pv $LFS/tools
fi

if [ ! -w $LFS ]; then
	echo "'$LFS' directory has no right access"
	echo "Please run 'chown -Rv $USER:$USER $LFS' as root"
	exit 1
fi

if [ ! -L /tools ] || [ $(realpath /tools) != $LFS/tools ]; then
	echo "Please create required '/tools' symlink by running 'ln -svf $LFS/tools /tools' as root"
	exit 1
fi

main $@

exit 0