#!/bin/bash

<< MIT-LICENSE
Copyright (c) 2023 Jianjun Liu<jianjunliu@126.com> https://www.pkglinux.top

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
MIT-LICENSE

PKG_STRAP_VERBOSE=""
PKG_STRAP_DESTDIR="/mnt"
PKG_STRAP_PREFIX="$(readlink /pkg)"
PKG_STRAP_PKGIN_REPO_CONF_FILE="etc/pkgin/repositories.conf"
PKG_STRAP_REPO=$(grep -v -e "^#" -e "^$" /pkg/$PKG_STRAP_PKGIN_REPO_CONF_FILE)

pkg-strap-usage()
{
	# Display Help
	echo "Create a new PKGLinux system installation from scratch."
	echo
	echo "Syntax: $0 [ -h|v|V|p|d ] [ --help|verbose|version|prefix|destdir ] [ repourl ]"
	echo "options:"
	echo "h     Print this help."
	echo "v     Verbose mode."
	echo "V     Print software version and exit."
	echo "p     Set new prefix."
	echo "d     Set new destination directory other than $PKG_STRAP_DESTDIR."
	echo
}

echo Starting $0 $@

for arg in "$@"; do
	shift
	case "$arg" in
		"--help")	set -- "$@" "-h" ;;
		"--verbose")	set -- "$@" "-v" ;;
		"--version")	set -- "$@" "-V" ;;
		"--prefix")	set -- "$@" "-p" ;;
		"--destdir")	set -- "$@" "-d" ;;
		*)		set -- "$@" "$arg"
	esac
done

while getopts ':hvVp:d:' OPTION; do
	case "$OPTION" in
		h)	# display usage
			pkg-strap-usage
			exit;;
		v)	# verbose mode
			PKG_STRAP_VERBOSE="-v"
			;;
		V)	# display version
			echo "1.0"	
			exit;;
		p)	# set new prefix
			PKG_STRAP_PREFIX="$OPTARG" ;;
		d)	# default destdir
			PKG_STRAP_DESTDIR="$OPTARG";;
		\?)	# Invalid option
	                echo "Error: Invalid option"
			exit;;
	esac
done

shift "$(($OPTIND -1))"

[[ "$#" -gt 1 ]] && pkg-strap-usage

[ ${UID} -ne 0 ] && echo "$0 will not be performed when not running as root" && exit 1;

[[ "$#" -gt 0 ]] && { PKG_STRAP_REPO=$1; }

#if [[ $(curl -sk --head "$PKG_STRAP_REPO" | head -n 1 | grep "HTTP/[1-3].[0-9] [23]..") ]]; then
#if curl --head --silent --fail -k "$PKG_STRAP_REPO" &> /dev/null; then
if curl --head --silent --fail -k "$PKG_STRAP_REPO" 2>&1> /dev/null; then
	echo "$PKG_STRAP_REPO is available."
else
	echo "$PKG_STRAP_REPO is not available."
	exit 1
fi

pkg_add $PKG_STRAP_VERBOSE -K /$PKG_STRAP_PREFIX/pkgdb $PKG_STRAP_REPO/pkg_install

/$PKG_STRAP_PREFIX/sbin/pkg_add $PKG_STRAP_VERBOSE -P $PKG_STRAP_DESTDIR $PKG_STRAP_REPO/pkgstrap

mkdir -p $PKG_STRAP_VERBOSE $PKG_STRAP_DESTDIR/$PKG_STRAP_PREFIX/var/db/pkgin/
mkdir -p $PKG_STRAP_VERBOSE $PKG_STRAP_DESTDIR/$PKG_STRAP_PREFIX/etc/pkgin/
( cd $PKG_STRAP_DESTDIR/$PKG_STRAP_PREFIX/; cp -a $PKG_STRAP_VERBOSE share/examples/pkgin etc/ )
( cd $PKG_STRAP_DESTDIR/$PKG_STRAP_PREFIX/etc/pkgin/; cp -a $PKG_STRAP_VERBOSE repositories.conf.example repositories.conf )
echo $PKG_STRAP_REPO >> $PKG_STRAP_DESTDIR/$PKG_STRAP_PREFIX/$PKG_STRAP_PKGIN_REPO_CONF_FILE

mkdir -p $PKG_STRAP_VERBOSE $PKG_STRAP_DESTDIR/{dev,proc,sys,run}	
mknod -m 600 $PKG_STRAP_DESTDIR/dev/console c 5 1
mknod -m 666 $PKG_STRAP_DESTDIR/dev/null c 1 3
mkdir -p $PKG_STRAP_VERBOSE $PKG_STRAP_DESTDIR/dev/pts
mkdir -p $PKG_STRAP_VERBOSE $PKG_STRAP_DESTDIR/run/nscd
install -d $PKG_STRAP_VERBOSE -m 1777 $PKG_STRAP_DESTDIR/tmp $PKG_STRAP_DESTDIR/var/tmp
mkdir -p $PKG_STRAP_VERBOSE $PKG_STRAP_DESTDIR/{home,mnt,opt}
mkdir -p $PKG_STRAP_VERBOSE $PKG_STRAP_DESTDIR/{media/{floppy,cdrom},srv}

mkdir -p $PKG_STRAP_VERBOSE $PKG_STRAP_DESTDIR/var/{log,mail,spool}
ln $PKG_STRAP_VERBOSE -sf ../run $PKG_STRAP_DESTDIR/var/
ln $PKG_STRAP_VERBOSE -sf ../run/lock $PKG_STRAP_DESTDIR/var/lock
mkdir -p $PKG_STRAP_VERBOSE $PKG_STRAP_DESTDIR/var/{opt,cache,lib/{avahi,color,colord,misc,polkit,locate},local}

ln $PKG_STRAP_VERBOSE -sf $PKG_STRAP_PREFIX $PKG_STRAP_DESTDIR/pkg
ln $PKG_STRAP_VERBOSE -sf pkg/native/{bin,etc,lib,lib32,lib64,libx32,root,sbin,usr} $PKG_STRAP_DESTDIR
ln $PKG_STRAP_VERBOSE -sf ../../run $PKG_STRAP_DESTDIR/pkg/var/

cp -a $PKG_STRAP_VERBOSE $PKG_STRAP_DESTDIR/pkg/gnu/bin/* $PKG_STRAP_DESTDIR/usr/bin/
cp -a $PKG_STRAP_VERBOSE $PKG_STRAP_DESTDIR/pkg/gnu/bin/* $PKG_STRAP_DESTDIR/bin/

ln $PKG_STRAP_VERBOSE -sf ../pkg/var/db/dbus/machine-id $PKG_STRAP_DESTDIR/etc/