Use rsync to manage esphome config directory

esphome tries to write build outputs to /nix/store which of course does
not work as it is read-only.

hosts/iron/services/esphome/default.nix

@@ -14,8 +14,6 @@ let
       mkdir $out
       cp -r * $out
       ln -snf "${config.sops.secrets.esphome.path}" "$out/secrets.yaml"
-      ln -snf "${stateDir}/.esphome" "$out/.esphome"
-      ln -snf "${stateDir}/.gitignore" "$out/.gitignore"
     '';
   };
   esphomeParams =
@@ -35,39 +33,19 @@ in
     enable = true;
     address = "127.0.0.1";
     port = ports.esphome.tcp;
-    /*
-      package = pkgs.esphome.overrideAttrs (o: o // {
-      propagatedBuildInputs = (o.propagatedBuildInputs or []) ++ [
-        pkgs.gcc
+    package = pkgs.esphome.overrideAttrs (attrs: {
+      makeWrapperArgs = attrs.makeWrapperArgs ++ [
+        "--prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath [ pkgs.stdenv.cc.cc.lib ]}"
       ];
-      makeWrapperArgs = [
-        # platformio is used in esphomeyaml/platformio_api.py
-        # esptool is used in esphomeyaml/__main__.py
-        # git is used in esphomeyaml/writer.py
-        "--prefix PATH : ${lib.makeBinPath (with pkgs; [ platformio esptool_3 git gcc])}"
-        "--set ESPHOME_USE_SUBPROCESS ''"
-      ];
-      });
-    */
-  };
-
-  systemd.services.esphome.serviceConfig = {
-    WorkingDirectory = lib.mkForce cfgdir;
-    ExecStart = lib.mkForce "${cfg.package}/bin/esphome dashboard ${esphomeParams} ${cfgdir}";
-    /*
-      Environment = [
-      "NIX_LD=/nix/store/qn3ggz5sf3hkjs2c797xf7nan3amdxmp-glibc-2.38-27/lib/ld-linux-x86-64.so.2"
-      "NIX_LD_LIBRARY_PATH=/nix/store/myw67gkgayf3s2mniij7zwd79lxy8v0k-gcc-12.3.0-lib/lib"
-      ];
-    */
+    });
   };
 
   system.activationScripts.esphome-custom = {
     deps = [ "users" "groups" ];
     text = ''
       mkdir -p "${stateDir}/.esphome"
-      touch "${stateDir}/.gitignore"
-      chown esphome:esphome "${stateDir}/.esphome" "${stateDir}/.gitignore"
+      ${pkgs.rsync}/bin/rsync -a --delete "${cfgdir}/" "${stateDir}/"
+      chown esphome:esphome "${stateDir}/"
     '';
   };
 }