Add a script to resume a zfs send/recv.

nix/configuration/roles/zfs/default.nix

@@ -17,6 +17,13 @@ let
       (old: {
         buildCommand = "${old.buildCommand}\n patchShebangs $out";
 
+      });
+  zfs_clone_resume =
+    (pkgs.writeScriptBin "zfs_clone_resume" (builtins.readFile ./files/zfs_clone_resume.bash))
+    .overrideAttrs
+      (old: {
+        buildCommand = "${old.buildCommand}\n patchShebangs $out";
+
       });
 in
 {
@@ -35,5 +42,6 @@ in
   environment.systemPackages = with pkgs; [
     zfs_clone_send
     zfs_clone_recv
+    zfs_clone_resume
   ];
 }

nix/configuration/roles/zfs/files/zfs_clone_resume.bash

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+#
+# Resume a zfs send.
+set -euo pipefail
+IFS=$'\n\t'
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+function main {
+    local hst="$1"
+    local dst="$2"
+    local token
+    token=$(zfs get -H -o value receive_resume_token "$dst")
+    ssh "$hst" doas zfs send --verbose -t "$token" | doas zfs recv -s "$dst"
+
+}
+
+main "${@}"