yazi: add fish and nushell integration

PR #4493

tests/modules/programs/yazi/default.nix

@@ -2,4 +2,6 @@
   yazi-settings = ./settings.nix;
   yazi-bash-integration-enabled = ./bash-integration-enabled.nix;
   yazi-zsh-integration-enabled = ./zsh-integration-enabled.nix;
+  yazi-fish-integration-enabled = ./fish-integration-enabled.nix;
+  yazi-nushell-integration-enabled = ./nushell-integration-enabled.nix;
 }

tests/modules/programs/yazi/fish-integration-enabled.nix

@@ -0,0 +1,27 @@
+{ ... }:
+
+let
+  shellIntegration = ''
+    function ya
+      set tmp (mktemp -t "yazi-cwd.XXXXX")
+      yazi --cwd-file="$tmp"
+      if set cwd (cat -- "$tmp") && [ -n "$cwd" ] && [ "$cwd" != "$PWD" ]
+        cd -- "$cwd"
+      end
+      rm -f -- "$tmp"
+    end
+  '';
+in {
+  programs.fish.enable = true;
+
+  programs.yazi = {
+    enable = true;
+    enableFishIntegration = true;
+  };
+
+  test.stubs.yazi = { };
+
+  nmt.script = ''
+    assertFileContains home-files/.config/fish/config.fish '${shellIntegration}'
+  '';
+}

tests/modules/programs/yazi/nushell-integration-enabled.nix

@@ -0,0 +1,33 @@
+{ pkgs, ... }:
+
+let
+  shellIntegration = ''
+    def-env ya [] {
+      let tmp = (mktemp -t "yazi-cwd.XXXXX")
+      yazi --cwd-file $tmp
+      let cwd = (cat -- $tmp)
+      if $cwd != "" and $cwd != $env.PWD {
+        cd $cwd
+      }
+      rm -f $tmp
+    }
+  '';
+in {
+  programs.nushell.enable = true;
+
+  programs.yazi = {
+    enable = true;
+    enableNushellIntegration = true;
+  };
+
+  test.stubs.yazi = { };
+
+  nmt.script = let
+    configPath = if pkgs.stdenv.isDarwin then
+      "home-files/Library/Application Support/nushell/config.nu"
+    else
+      "home-files/.config/nushell/config.nu";
+  in ''
+    assertFileContains '${configPath}' '${shellIntegration}'
+  '';
+}