path: root/modules.d/conf-tgz/hooks/s3-unpack-config-tgz.sh

#!/bin/ash
# -*- coding: utf-8 -*-

# tarcopy <source_dir> <target_dir>
tarcopy() (
	if ! [ -d "$1" ] || ! [ -d "$2" ]; then
		echo "'$1' or '$2' is not a directory"
		return 1
	fi
	cd "$1" || return 1
	local filelist="$(mktemp)"
	find . \! -type d > "$filelist"
	if [ -s "$filelist" ]; then
		tar -c -p -T "$filelist" | tar -xp -C "$2" || return 1
	fi
	rm -f -- "$filelist"
	return 0
)

config_tgz="/etc/config.tgz"
[ -e "$config_tgz" ] || exit 1
# create list of overwritten files for debugging purposes
mkdir -p "${NEWROOT}/opt/openslx"
tar \
	--list \
	--verbose \
	--file="$config_tgz" \
	> "${NEWROOT}/opt/openslx/config.tgz.list" 2>&1
extract_dir="$(mktemp -d)"
if ! tar \
		--extract \
		--preserve-permissions \
		--file="$config_tgz" \
		--directory="$extract_dir"; then
	echo "Failed to extract '$config_tgz' to '$extract_dir'."
	exit 1
fi
# check SLX_LOCAL_CONFIGURATION
. "/etc/openslx"
if [ -n "$SLX_LOCAL_CONFIGURATION" ]; then
	if ! [ -d "${extract_dir}/openslx-configs/${SLX_LOCAL_CONFIGURATION}" ]; then
		echo "Ignoring missing SLX_LOCAL_CONFIGURATION in '$config_tgz'."
	else
		tarcopy \
			"${extract_dir}/openslx-configs/${SLX_LOCAL_CONFIGURATION}" \
			"${extract_dir}"
	fi
fi
# always purge openslx-configs/
rm -rf "${extract_dir}/openslx-configs"

# finally copy the rest into stage4
if ! tarcopy "${extract_dir}" "$NEWROOT"; then
	echo "'tarcopy' from '$extract_dir' to '$NEWROOT' failed."
	exit 1
fi

exit 0