soft coding

lib/xlib/default.nix

@@ -40,6 +40,8 @@ in
       hostname,
       type,
       username ? "oqyude",
+      uid ? 1000,
+      gid ? 1000,
     }:
     let
       device = mkDevice {
@@ -47,6 +49,8 @@ in
           hostname
           type
           username
+          uid
+          gid
           ;
       };
     in
@@ -56,11 +60,19 @@ in
           hostname
           type
           username
+          uid
+          gid
           ;
       };
       isDesktop = device.isDesktop;
       isHeadless = device.isHeadless;
       dirs = mkDirs username;
-      inherit helpers;
+      # Bind the host's ids into the mount helpers, so ntfs3/exfat options
+      # carry the same uid/gid the primary user actually has.
+      helpers = import ./helpers.nix {
+        inherit lib;
+        uid = device.uid;
+        gid = device.gid;
+      };
     };
 }

lib/xlib/device.nix

@@ -49,6 +49,12 @@ in
       hostname,
       type,
       username ? "oqyude",
+      # The primary user is pinned to 1000 rather than left to NixOS'
+      # nextfree logic: the mount helpers below write uid=/gid= into
+      # ntfs3/exfat options, and an NTFS/exFAT volume mounted with a
+      # different id shows every file as owned by `nobody`.
+      uid ? 1000,
+      gid ? 1000,
     }:
     let
       capabilities = devices.${type} or (throw "xlib: unknown device type '${type}', expected one of ${lib.concatStringsSep ", " (builtins.attrNames devices)}");
@@ -58,6 +64,8 @@ in
         hostname
         type
         username
+        uid
+        gid
         ;
       isDesktop = capabilities.desktop;
       isHeadless = capabilities.headless;

lib/xlib/helpers.nix

@@ -1,5 +1,10 @@
 {
   lib,
+  # The primary user's ids, bound from xlib.device by mkXlib. ntfs3/exfat
+  # volumes carry POSIX ids, so a mount using anything other than the real
+  # uid/gid shows every file as owned by `nobody`.
+  uid,
+  gid,
   ...
 }:
 # Pure helper functions for module definitions.
@@ -105,8 +110,8 @@ let
         fsType = "ntfs3";
         options = [
           "defaults"
-          "uid=1000"
-          "gid=1000"
+          "uid=${toString uid}"
+          "gid=${toString gid}"
           "fmask=${mask}"
           "dmask=${mask}"
           "nofail"
@@ -128,8 +133,8 @@ let
         fsType = "exfat";
         options = [
           "nofail"
-          "uid=1000"
-          "gid=1000"
+          "uid=${toString uid}"
+          "gid=${toString gid}"
         ];
       };
     };