modules/sendsms: gate the unit with a file

To prevent the unit to be triggered multiple times if the host has
already rebooted, we create a gate file when we're done running, and
before running, we check if the file exists.

Enable the service on tahoe.

Don't restart the unit when its definition has changed.

1 files changed, 4 insertions, 0 deletions

diff --git a/flake.nix b/flake.nix
index f08ceb7..6179c2e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -54,6 +54,10 @@
         nixpkgs-stable.follows = "nixpkgs";
       };
     };
+
+    sendsms = {
+      url = "git+https://git.fcuny.net/fcuny/sendsms?ref=main";
+    };
   };
 
   # Output config, or config for NixOS system