mx: add timer for blog rendering

Signed-off-by: Harald Hoyer <harald@hoyer.xyz>

homes/x86_64-linux/harald@mx/default.nix

@@ -31,5 +31,37 @@
 
   xdg.enable = true;
   xdg.mime.enable = true;
+
+  systemd.user.services = {
+    render_blog = {
+      Service = {
+        Type = "oneshot";
+        ExecStart = toString (
+          pkgs.writeShellScript "render_blog.sh" ''
+            set -eou pipefail
+            DIR=/var/tmp/blog.$$
+            rm -fr $DIR
+            mkdir -p $DIR
+            cd $DIR
+            ${pkgs.git}/bin/git clone --recurse-submodules https://git.hoyer.xyz/harald/blog.git
+            cd blog
+            ./build.sh
+            cd /var/tmp
+            rm -fr $DIR
+          ''
+        );
+      };
+      Install.WantedBy = [ "default.target" ];
+    };
+  };
+
+  systemd.user.timers = {
+    render_blog = {
+      Timer = {
+        OnCalendar = "hourly";
+      };
+      Install.WantedBy = [ "timers.target" ];
+    };
+  };
 }