An attempt was made

nixos/boxes/colony/vms/git/default.nix

@@ -102,6 +102,34 @@ in
 
             services = {
               fstrim = lib.my.c.colony.fstrimConfig;
+              # Hacks for Jsch (Minecraft FastBack) to work
+              openssh = {
+                hostKeys = [
+                  {
+                    bits = 4096;
+                    path = "/etc/ssh/ssh_host_rsa_key";
+                    type = "rsa";
+                  }
+                  {
+                    path = "/etc/ssh/ssh_host_ed25519_key";
+                    type = "ed25519";
+                  }
+
+                  {
+                    type = "ecdsa-sha2-nistp256";
+                    path = "/etc/ssh/ssh_host_ecdsa_key";
+                  }
+                ];
+                settings = {
+                  Macs = [
+                    "hmac-sha2-512-etm@openssh.com"
+                    "hmac-sha2-256-etm@openssh.com"
+                    "umac-128-etm@openssh.com"
+
+                    "hmac-sha2-256"
+                  ];
+                };
+              };
               netdata.enable = true;
               nginx = {
                 enable = true;

nixos/boxes/colony/vms/whale2/minecraft/default.nix

@@ -1,4 +1,4 @@
-{ lib, config, allAssignments, ... }:
+{ lib, pkgs, config, allAssignments, ... }:
 let
   inherit (lib) concatStringsSep;
   inherit (lib.my) dockerNetAssignment;
@@ -18,6 +18,17 @@ let
     "d6ec4c91-5da2-44eb-b89d-71dc8fe017a0" # Eefah98
     "096a7348-fabe-4b2d-93fc-fd1fd5608fb0" # ToTheMoonStar
   ];
+
+  fastback = {
+    gitConfig = pkgs.writeText "git-config" ''
+      [user]
+      	email = "simpcraft@nul.ie"
+      	name = "Simpcraft bot"
+    '';
+    knownHosts = pkgs.writeText "known_hosts" ''
+      git.nul.ie ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBD023ECzYmLeXIpcGVaciPjq6UN/Sjmsys5HP/Nei5GkrUZqPa3OJ2uSXKLUSKGYdeNhxaFTPJe8Yx3TsZxMme8=
+    '';
+  };
 in
 {
   config = {
@@ -87,6 +98,9 @@ in
         volumes = [
           "minecraft_staging_data:/data"
           "${./icon.png}:/ext/icon.png:ro"
+          "${fastback.gitConfig}:/data/.config/git/config:ro"
+          "${fastback.knownHosts}:/data/.ssh/known_hosts:ro"
+          "${config.age.secrets."whale2/simpcraft-git.key".path}:/data/.ssh/id_rsa"
         ];
 
         extraOptions = [
@@ -98,6 +112,9 @@ in
     my = {
       secrets.files = {
         "whale2/simpcraft.env" = {};
+        "whale2/simpcraft-git.key" = {
+          owner = "1000";
+        };
       };
     };
   };

secrets/whale2/simpcraft-git.key.age

@@ -0,0 +1,64 @@
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