chore: let gdb use a single history file

users/myuser/dev/gdb.nix

@@ -1,12 +1,16 @@
-{ pkgs, ... }: let
+{pkgs, ...}: let
   # pwndbg wraps a gdb binary for us, but we want debuginfod in there too.
   # Also make it the default gdb.
-  pwndbgWithDebuginfod = (pkgs.pwndbg.override {
+  pwndbgWithDebuginfod =
+    (pkgs.pwndbg.override {
       gdb = pkgs.gdb.override {
         enableDebuginfod = true;
       };
-  }).overrideAttrs (_finalAttrs: previousAttrs: {
-    installPhase = previousAttrs.installPhase + ''
+    })
+    .overrideAttrs (_finalAttrs: previousAttrs: {
+      installPhase =
+        previousAttrs.installPhase
+        + ''
           ln -s $out/bin/pwndbg $out/bin/gdb
         '';
     });
@@ -19,11 +23,18 @@ in {
   home.file.gdbinit = {
     target = ".gdbinit";
     text = ''
-      set debuginfod enabled on
       set auto-load safe-path /
-      set disassembly-flavor intel
+      set debuginfod enabled on
+
       set history save on
+      set history filename ~/.local/share/gdb/history
+
+      set disassembly-flavor intel
       set print pretty on
     '';
   };
+
+  home.persistence."/state".directories = [
+    ".local/share/gdb"
+  ];
 }