Move devshell to subdirectory

devshell/commands.nix

@@ -0,0 +1,52 @@
+{ pkgs, ... }:
+let
+  homeFlake = "$HOME/.config/nixpkgs/flake.nix";
+in
+{
+  commands = [
+    {
+      name = "repl";
+      category = "utilities";
+      help = "Open a `nix repl` with this flake";
+      command =
+        ''
+          tmp="$(mktemp --tmpdir repl.nix.XXXXX)"
+          echo "builtins.getFlake \"$PRJ_ROOT\"" > "$tmp"
+          nix repl "$tmp" || true
+          rm "$tmp"
+        '';
+    }
+    {
+      name = "home-link";
+      category = "utilities";
+      help = "Install link to flake.nix for home-manager to use";
+      command =
+        ''
+          [ -e "${homeFlake}" ] && echo "${homeFlake} already exists" && exit 1
+
+          mkdir -p "$(dirname "${homeFlake}")"
+          ln -s "$(pwd)/flake.nix" "${homeFlake}"
+          echo "Installed link to $(pwd)/flake.nix at ${homeFlake}"
+        '';
+    }
+    {
+      name = "home-unlink";
+      category = "utilities";
+      help = "Remove home-manager flake.nix link";
+      command = "rm -f ${homeFlake}";
+    }
+
+    {
+      name = "fmt";
+      category = "tasks";
+      help = pkgs.nixpkgs-fmt.meta.description;
+      command = ''exec "${pkgs.nixpkgs-fmt}/bin/nixpkgs-fmt" "$@"'';
+    }
+    {
+      name = "home-switch";
+      category = "tasks";
+      help = "Run `home-manager switch`";
+      command = ''home-manager switch --flake . "$@"'';
+    }
+  ];
+}