initial commit

lib.nix

@@ -0,0 +1,55 @@
+{ pkgs, ... }:
+let
+  lib = pkgs.lib;
+  defaultUpdater = { git ? null, url ? null, path ? null, keys ? null, dest, check }:
+    let
+      config.systemd.services."fooud-${dest}" = {
+        serviceConfig = {
+          Type = "oneshot";
+          User = "root";
+          Group = "root";
+          ExecStart = let
+            dest = lib.assertMsg dest "dest must be set";
+            remote =
+              if git then "--git " + git
+              else if url then "--url " + url
+              else if path then "--path " + path
+              else builtins.throw "one of git, url or path must be set";
+            keys_str = if git then
+              lib.strings.concatStrings builtins.map (x: "--key ${x} ") keys
+            else throw "cannot use keys with git";
+
+          in pkgs.writeShellScript "fooud-${dest}-wrapper" ''
+              ${pkgs.fooud}/bin/fooud ${keys_str} ${remote} ${dest}
+              '';
+        };
+      };
+
+      config.systemd.timers.${dest} = {
+        wantedBy = [ "timers.target" ];
+        timerConfig = {
+          OnActiveSec = "0s";
+          OnUnitActiveSec = check;
+          Unit = "fooud-${dest}.service";
+          Persistent = true;
+        };
+      };
+    in
+      dest;
+in
+let
+  gitUpdater = { git, keys, dest, check }:
+    defaultUpdater { git = git; keys = keys; dest = dest; check = check; };
+  fsUpdater = { path, dest, check }:
+    defaultUpdater { path = path; dest = dest; check = check; };
+  urlUpdater = { url, dest, check }:
+    defaultUpdater { url = url; dest = dest; check = check; };
+
+  lib = {
+    inherit
+      gitUpdater
+      fsUpdater
+      urlUpdater;
+  };
+  in
+lib