Support restic's --one-file-system option.

examples/example.restic

@@ -32,6 +32,9 @@ exclude =
 # This option may be specified multiple times.
 tag =
 
+# Only backup files from the file systems on which the initially specified files or directories reside.
+one_file_system = yes
+
 [retention]
 
 # Never delete the n last (most recent) snapshots

handlers/restic.in

@@ -44,6 +44,7 @@ if [[ "$backup" == "yes" ]]; then
    getconf include "/etc /home /usr/local"
    getconf exclude "/tmp /proc /dev /sys /net /misc /media /srv /selinux"
    getconf tag
+   getconf one_file_system "yes"
 
    if [ -z "$include" ]; then
       debug "No files or directories specified for backup."
@@ -78,9 +79,14 @@ if [[ "$backup" == "yes" ]]; then
       done
    fi
 
+   if [[ "$one_file_system" == "yes" ]]; then
+      other_options="$other_options --one-file-system"
+   fi
+
+
    info "Taking backup snapshot."
-   debug "Running: restic --repo $repo --password-file $password_file backup $tag_options $exclude_options $include_options"
-   restic --repo $repo --password-file $password_file backup $tag_options $exclude_options $include_options
+   debug "Running: restic --repo $repo --password-file $password_file backup $other_options $tag_options $exclude_options $include_options"
+   restic --repo $repo --password-file $password_file backup $other_options $tag_options $exclude_options $include_options
    [ $? -ne 0 ] && fatal "restic backup failed."
 
 else