refactor: remove $.cwd and use Deno.chdir for cd

src/runtime/cd.ts

@@ -1,22 +1,19 @@
 import { error } from "../_utils.ts";
 
-export function cd(path: string) {
+export function cd(dir: string) {
   if ($.verbose) {
-    console.log($.brightBlue("$ %s"), `cd ${path}`);
+    console.log($.brightBlue("$ %s"), `cd ${dir}`);
   }
-
   try {
-    Deno.lstatSync(path);
+    Deno.chdir(new URL(dir, $.mainModule).pathname);
   } catch (err) {
     if (err instanceof Deno.errors.NotFound) {
       const stack: string = (new Error().stack!.split("at ")[2]).trim();
-      error(`cd: ${path}: No such directory\n  at ${stack}`);
+      error(`cd: ${dir}: No such directory\n    at ${stack}`);
     } else if (err instanceof Deno.errors.PermissionDenied) {
       const stack: string = (new Error().stack!.split("at ")[2]).trim();
-      error(`cd: ${path}: Permission denied\n  at ${stack}`);
+      error(`cd: ${dir}: Permission denied\n    at ${stack}`);
     }
     error(err);
   }
-
-  $.cwd = path;
 }

src/runtime/exec.ts

@@ -17,7 +17,6 @@ export async function exec(
   const combined: Array<string> = [];
   const process = Deno.run({
     cmd: [$.shell, "-c", cmd],
-    cwd: $.cwd,
     env: Deno.env.toObject(),
     stdout: "piped",
     stderr: "piped",

src/runtime/mod.ts

@@ -7,7 +7,6 @@ export type $ = typeof exec & typeof colors & {
   shell: string;
   mainModule: string;
   verbose: boolean;
-  cwd: string;
   quote: typeof shq;
   throwErors: boolean;
 };
@@ -20,7 +19,6 @@ $._stack = [];
 $.shell = "/bin/sh";
 $.mainModule = "";
 $.verbose = false;
-$.cwd = Deno.cwd();
 $.quote = shq;
 $.throwErors = false;