// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import { join } from "jsr:/@std/path@^0.224.0/join";
import { toPathString } from "./_to_path_string.ts";
/**
 * Asynchronously ensures that a directory is empty deletes the directory
 * contents it is not empty. If the directory does not exist, it is created.
 * The directory itself is not deleted.
 *
 * Requires the `--allow-read` and `--allow-write` flag.
 *
 * @param dir The path of the directory to empty, as a string or URL.
 * @returns A void promise that resolves once the directory is empty.
 *
 * @example
 * ```ts
 * import { emptyDir } from "@std/fs/empty-dir";
 *
 * await emptyDir("./foo");
 * ```
 */ export async function emptyDir(dir) {
  try {
    const items = await Array.fromAsync(Deno.readDir(dir));
    await Promise.all(items.map((item)=>{
      if (item && item.name) {
        const filepath = join(toPathString(dir), item.name);
        return Deno.remove(filepath, {
          recursive: true
        });
      }
    }));
  } catch (err) {
    if (!(err instanceof Deno.errors.NotFound)) {
      throw err;
    }
    // if not exist. then create it
    await Deno.mkdir(dir, {
      recursive: true
    });
  }
}
/**
 * Synchronously ensures that a directory is empty deletes the directory
 * contents it is not empty. If the directory does not exist, it is created.
 * The directory itself is not deleted.
 *
 * Requires the `--allow-read` and `--allow-write` flag.
 *
 * @param dir The path of the directory to empty, as a string or URL.
 * @returns A void value that returns once the directory is empty.
 *
 * @example
 * ```ts
 * import { emptyDirSync } from "@std/fs/empty-dir";
 *
 * emptyDirSync("./foo");
 * ```
 */ export function emptyDirSync(dir) {
  try {
    const items = [
      ...Deno.readDirSync(dir)
    ];
    // If the directory exists, remove all entries inside it.
    while(items.length){
      const item = items.shift();
      if (item && item.name) {
        const filepath = join(toPathString(dir), item.name);
        Deno.removeSync(filepath, {
          recursive: true
        });
      }
    }
  } catch (err) {
    if (!(err instanceof Deno.errors.NotFound)) {
      throw err;
    }
    // if not exist. then create it
    Deno.mkdirSync(dir, {
      recursive: true
    });
  }
}
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