#!/bin/sh
#-
# Copyright (c) 2011 Nathan Whitehorn
# Copyright (c) 2013-2018 Devin Teske
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$
#

error()
{
	bsddialog --backtitle "FreeBSD Installer" --title "Error" --msgbox "$1" 0 0
	exit 1
}

FETCH_DISTRIBUTIONS=""
LOCAL_DISTRIBUTIONS=""
for dist in $DISTRIBUTIONS; do
	if [ ! -f $BSDINSTALL_DISTDIR/$dist ]; then
		FETCH_DISTRIBUTIONS="$FETCH_DISTRIBUTIONS $dist"
	else
		LOCAL_DISTRIBUTIONS="$LOCAL_DISTRIBUTIONS $dist"
	fi
done
LOCAL_DISTRIBUTIONS=`echo $LOCAL_DISTRIBUTIONS`	# Trim white space
FETCH_DISTRIBUTIONS=`echo $FETCH_DISTRIBUTIONS`	# Trim white space

if [ -z "$FETCH_DISTRIBUTIONS" ]; then
	echo $BSDINSTALL_DISTDIR >&2
	exit 0
fi

ALL_DISTRIBUTIONS="$DISTRIBUTIONS"
WANT_DEBUG=

# Download to a directory in the new system as scratch space
BSDINSTALL_FETCHDEST="$BSDINSTALL_CHROOT/usr/freebsd-dist"
mkdir -p "$BSDINSTALL_FETCHDEST" || error "Could not create directory $BSDINSTALL_FETCHDEST"

if [ -z "$BSDINSTALL_DISTSITE" ]; then
	exec 3>&1
	BSDINSTALL_DISTSITE=$(`dirname $0`/mirrorselect 2>&1 1>&3)
	MIRROR_BUTTON=$?
	exec 3>&-
	test $MIRROR_BUTTON -eq 0 || error "No mirror selected"
	export BSDINSTALL_DISTSITE
fi

BSDINSTALL_DISTDIR_ORIG="$BSDINSTALL_DISTDIR"
export BSDINSTALL_DISTDIR="$BSDINSTALL_FETCHDEST"
export FTP_PASSIVE_MODE=YES

if [ -f "$BSDINSTALL_DISTDIR_ORIG/MANIFEST" ]; then
	cp "$BSDINSTALL_DISTDIR_ORIG/MANIFEST" "$BSDINSTALL_DISTDIR/MANIFEST"
	VERIFY_MANIFEST_SIG=0
else
	FETCH_DISTRIBUTIONS="MANIFEST $FETCH_DISTRIBUTIONS"
	VERIFY_MANIFEST_SIG=1

	# XXX actually verify signature on manifest
	bsddialog --backtitle "$OSNAME Installer" --title "Warning" --msgbox "Manifest not found on local disk and will be fetched from an unverified source. This is a potential security risk. If you do not wish to proceed, press control-C now." 0 0
fi

if [ ! -z "$LOCAL_DISTRIBUTIONS" ]; then
	# Copy local stuff first
	env DISTRIBUTIONS="$LOCAL_DISTRIBUTIONS" \
		BSDINSTALL_DISTSITE="file://$BSDINSTALL_DISTDIR" \
		bsdinstall distfetch || \
		error "Failed to fetch distribution from local media"
fi

export DISTRIBUTIONS="$FETCH_DISTRIBUTIONS"

# Iterate through the distribution list and set a flag if debugging
# distributions have been selected.
for _DISTRIBUTION in $DISTRIBUTIONS; do
	case $_DISTRIBUTION in
		*-dbg.*)
			[ -e $BSDINSTALL_DISTDIR/$_DISTRIBUTION ] \
				&& continue
			WANT_DEBUG=1
			DEBUG_LIST="\n$DEBUG_LIST\n$_DISTRIBUTION"
			;;
		*)
			;;
	esac
done

# Fetch the distributions.
bsdinstall distfetch
rc=$?

if [ $rc -ne 0 ]; then
	# If unable to fetch the remote distributions, recommend
	# deselecting the debugging distributions, and retrying the
	# installation, since failure to fetch *-dbg.txz should not
	# be considered a fatal installation error.
	msg="Failed to fetch remote distribution"
	if [ ! -z "$WANT_DEBUG" ]; then
		# Trim leading and trailing newlines.
		DEBUG_LIST="${DEBUG_LIST%%\n}"
		DEBUG_LIST="${DEBUG_LIST##\n}"
		msg="$msg\n\nPlease deselect the following distributions"
		msg="$msg and retry the installation:"
		msg="$msg\n$DEBUG_LIST"
	fi
	error "$msg"
fi

echo $BSDINSTALL_DISTDIR >&2