Fix fish shell variable scope in init command

[hirotaka]

Summary

Fixes a fish shell variable scope bug where the cd command was not being executed after selecting a directory.

Problem

In fish shell, variables declared with set -l inside switch case blocks are scoped to that block only. This caused the cmd variable to be undefined outside the switch statement, resulting in the cd command not being executed.

Solution

• Declare cmd variable before the switch statement with set -l cmd ""
• Use set (without -l) inside case blocks to update the outer scope variable

Testing

All existing tests pass after this fix (22 tests, 68 assertions).

[franck]

Thanks. This changes fix try with fish.

[gamb]

For any home manager users you can adopt this patch with an override:

  programs.try = {
    enable = true;
    package = inputs.try.packages.${system}.default.overrideAttrs (old: {
      patches = (old.patches or [ ]) ++ [
        (pkgs.fetchpatch {
          url = "https://patch-diff.githubusercontent.com/raw/tobi/try/pull/39.diff";
          sha256 = "sha256-wZdZskcfBD3Z5xlyozO70O3v87Dx8hKb8+kX8eCE9Zw=";
        })
      ];
    });
  };

Confirmed it works for me