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#!/usr/bin/env sh
set -e

WD="${WD:-/usr/mp}"
PORTS="${PORTS:-/usr/ports/ports}"
PORTS_DIR="${PORTS_DIR:-/usr/ports}"
PORTS_REPO="${PORTS_REPO:-https://git.0druid.cc/druid520/ports.git}"
STATUS="$WD/status"
INSTALLED="$WD/installed"
EXTINSTALLED="$WD/extinstalled"
CFG="$WD/mp.conf"

war() {
	echo "warn: $1" >&2
}
die() {
	echo "err: $1" >&2
	exit 1
}
ok() {
	echo "ok: $1" >&2
}

if [ -f "$CFG" ]; then
	. "$CFG"
fi

mp_init() {
	if [ -f "$STATUS" ]; then
		return
	fi
	war "uninitialized, initializing."
	git clone "$PORTS_REPO" "$PORTS_DIR" --depth 1 || die "failed cloning $PORTS_REPO to $PORTS_DIR."
	mkdir -p "$WD" || die "failed making $WD."
	touch "$STATUS" "$INSTALLED" "$EXTINSTALLED" || die "failed making $STATUS, $INSTALLED, $EXTINSTALLED."
}
mp_add() {
	if [ -z "$1" ]; then
		die "pkg name required."
	fi
	if [ ! -d "$PORTS/$1" ]; then
		die "port $1 not found."
	fi

	cp -r "$PORTS/$1" "$WD/$1" || die "failed copying $PORTS/$1 to $WD/$1."
	cd "$WD/$1" || die "failed changing directory to $WD/$1."
	
	if [ -f "pkg.conf" ]; then
		. ./pkg.conf || die "unknown error involving $WD/$1/pkg.conf."
 	else
		die "missing $WD/$1/pkg.conf."
	fi
	if [ -z "$pkg_name" ]; then
		die "pkg_name not set in $WD/$1/pkg.conf."
	fi
	if [ -z "$pkg_ver" ]; then
		die "pkg_ver not set in $WD/$1/pkg.conf."
	fi
	if [ -z "$pkg_license" ]; then
		die "pkg_license not set in $WD/$1/pkg.conf."
	fi 

	if [ -f "add.sh" ]; then
		sh ./add.sh || die "$WD/$1/add.sh failed."
	else
		die "missing $WD/$1/add.sh."
	fi
	
	echo "$pkg_name" | tee -a "$INSTALLED" || die "failed writing to $INSTALLED."
	echo "$pkg_name-$pkg_ver ($pkg_license)" | tee -a "$EXTINSTALLED" || die "failed writing to $EXTINSTALLED."
	
	ok "$pkg_name added."
}
mp_del() {
        if [ -z "$1" ]; then
                die "pkg name required."
        fi
        if [ ! -d "$WD/$1" ]; then
                die "pkg not installed."
        fi

        cd "$WD/$1" || die "failed changing directory to $WD/$1."

        if [ -f "pkg.conf" ]; then
                . ./pkg.conf || die "unknown error involving $WD/$1/pkg.conf."
        else
                die "missing $WD/$1/pkg.conf."
        fi
        if [ -z "$pkg_name" ]; then
                die "pkg_name not set in $WD/$1/pkg.conf."
        fi
        if [ -z "$pkg_ver" ]; then
                die "pkg_ver not set in $WD/$1/pkg.conf."
        fi
        if [ -z "$pkg_license" ]; then
                die "pkg_license not set in $WD/$1/pkg.conf."
        fi

        if [ -f "del.sh" ]; then
                sh ./del.sh || die "$WD/$1/del.sh failed."
        else
                die "missing $WD/$1/del.sh."
        fi

        sed -i "/^$pkg_name$/d" "$INSTALLED" || die "failed writing to $INSTALLED."
        sed -i "/^$pkg_name-$pkg_ver (/d" "$EXTINSTALLED" || die "failed writing to $EXTINSTALLED."
        rm -rf "$WD/$1" || die "failed removing $WD/$1."

	ok "$pkg_name deleted."
}
mp_cln() {
	if [ -z "$1" ]; then
		die "pkg name required."
	fi
	if [ ! -d "$WD/$1" ]; then
		die "pkg wd not found."
	fi

	rm -rf "$WD/$1" || die "failed removing $WD/$1."

	ok "$1 cleaned."
}
mp_upd() {
	cd "$PORTS_DIR" || die "missing $PORTS_DIR."
	git pull || die "failed git pull on $PORTS_DIR."

	if [ "$1" = "_" ]; then
		if [ ! -f "$INSTALLED" ]; then
			die "no pkgs installed."
		fi
		for pkg in $(cat "$INSTALLED"); do
			(mp_del "$pkg")
			(mp_add "$pkg")
			ok "$pkg updated."
		done
	else
		(mp_del "$1")
		(mp_add "$1")
		ok "$1 updated."
	fi
}

mp_init

case $# in
	0|1)
		die "usage: mp <a|d|u|c> <pkg|_>."
		;;
	*)
		case $1 in
			a) (mp_add "$2") ;;
			d) (mp_del "$2") ;;
			u) (mp_upd "$2") ;;
			c) (mp_cln "$2") ;;
			*) die "usage: mp <a|d|u> <pkg|_>." ;;
		esac
		;;
esac