improved go caching with nix

Co-authored-by: Gelu Vrabie <[email protected]>

.flake-modules/go-forwarder.nix

@@ -62,11 +62,8 @@
       make-shells.default = {
         # Go 1.24 compiler – align with go.mod
         packages = [ pkgs.go_1_24 ];
-
-        # TODO: change this into exported env via nix directly???
-        shellHook = ''
-          export GOPATH=$(mktemp -d)
-        '';
+        shellHook = "export GOPATH=$FLAKE_ROOT/.go_cache";
       };
     };
 }
+

.gitignore

@@ -4,6 +4,9 @@ __pycache__
 
 hosts_*.json
 
+# go cache is project local but not tracked
+.go_cache
+
 # hide direnv stuff
 .direnv/
 # TODO figure out how to properly solve the issue with these target directories showing up
@@ -21,4 +24,3 @@ rust/Cargo.lock
 
 # Says this symlink should be git-ignored https://github.com/juspay/just-flake
 just-flake.just
-.DS_Store