hst/grp_pwd: specify new uid format

This leaves slots available for additional uid ranges in Rosa OS.

This breaks all existing installations! Users are required to fix ownership manually.

Closes #18.

Signed-off-by: Ophestra <cat@gensokyo.uk>

nixos.nix

@@ -20,9 +20,10 @@ let
 
   cfg = config.environment.hakurei;
 
-  getsubuid = fid: aid: 1000000 + fid * 10000 + aid;
-  getsubname = fid: aid: "u${toString fid}_a${toString aid}";
-  getsubhome = fid: aid: "${cfg.stateDir}/u${toString fid}/a${toString aid}";
+  # userid*userOffset + appStart + appid
+  getsubuid = userid: appid: userid * 100000 + 10000 + appid;
+  getsubname = userid: appid: "u${toString userid}_a${toString appid}";
+  getsubhome = userid: appid: "${cfg.stateDir}/u${toString userid}/a${toString appid}";
 in
 
 {