mount.restic

#!/bin/bash

set -e
set -u

declare -a available_restic_mount_opts=($(restic mount --help | grep -Eio "[-]-[a-z0-9-]+"))
declare -a restic_mount_args=()
fuse_opts=''

mntname=$1
shift
mntpoint=$1
shift


while [ $# -gt 0 ]
do
case "$1" in
-o)
	shift
	oldIFS=$IFS
	IFS=,
	for option in $1
	do
		option_key=${option%%=*}
		is_restic_opt=0
		for restic_opt in "${available_restic_mount_opts[@]}"
		do
			case "$restic_opt" in
			--repo)	continue;;
			esac
			
			if [ "--$option_key" = "$restic_opt" ]
			then
				if [[ $option =~ =(.+) ]]
				then
					option_value=${BASH_REMATCH[1]}
					if [ "${option_value:0:2}" = '~/' ]
					then
						option_value=$HOME/${option_value:2}
						option="$option_key=$option_value"
					fi
				fi
				
				restic_mount_args+=("--$option")
				is_restic_opt=1
				break
			fi
		done
		
		if [ $is_restic_opt = 0 ]
		then
			fuse_opts=$fuse_opts${fuse_opts:+,}$option
		fi
	done
	IFS=$oldIFS
	;;
-n|-s)
	true
	;;
*)
	echo "Unknown option: $1" >&2
	exit 255
	;;
esac
shift
done

set +u

exec setsid restic mount "${restic_mount_args[@]}" --repo="$mntname" ${fuse_opts:+-o "$fuse_opts"} "$mntpoint" &
disown