First pass at oracles automation

machines/oracles/automation.nix

@@ -0,0 +1,16 @@
+{ config, lib, pkgs, ... }:
+let
+  repo-updater = pkgs.writeShellScriptBin "repo-updater"
+    (builtins.readFile ../../scripts/gitea/update-repo.sh);
+in {
+  # Automate updating rust utility flake
+  systemd.services."rust-util-update" = {
+    environment = { XDG_RUNTIME_DIR = "/tmp"; };
+    serviceConfig = {
+      ExecStart =
+        "${repo-updater}/bin/repo-updater gitea@git.stranger.systems:nix/Rust.git trunk";
+      Type = "oneshot";
+      User = "nathan";
+    };
+  };
+}

machines/oracles/configuration.nix

@@ -1,6 +1,7 @@
 { config, lib, pkgs, inputs, ... }:
 
 {
+  imports = [ ./automation.nix ];
   # Sops setup for this machine
   sops.secrets = {
     "borg-ssh-key" = {

scripts/gitea/update-repo.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+set -eou pipefail
+
+TEMP_DIR=$(mktemp -d "repo-updater.XXXX" -p $XDG_RUNTIME_DIR)
+pushd $TEMP_DIR
+
+git clone "$1" repo
+pushd repo
+git switch $2
+
+./update.sh
+
+git add -A
+if git commit -m "Update flake/dependencies"; then
+    git push -u origin $2
+else
+    echo "No changes made"
+fi
+
+popd
+popd
+rm -rf $TEMP_DIR