From b47f5287648f0839ec7cfa4e28f584a967d3b37e Mon Sep 17 00:00:00 2001
From: Luke Edwards <luke.edwards05@gmail.com>
Date: Mon, 10 Aug 2020 22:00:51 -0700
Subject: [PATCH] feat: add `deno` entry (#4)

* feat: add `deno` entry

* chore: rename `index.ts` -> `async.ts`

* feat: add `deno/sync` entry

* chore: add jsdocs

* chore: add "deno" section to readme
---
 deno/async.ts | 29 +++++++++++++++++++++++++++++
 deno/sync.ts  | 28 ++++++++++++++++++++++++++++
 readme.md     | 22 ++++++++++++++++++++++
 3 files changed, 79 insertions(+)
 create mode 100644 deno/async.ts
 create mode 100644 deno/sync.ts

diff --git a/deno/async.ts b/deno/async.ts
new file mode 100644
index 0000000..78046cb
--- /dev/null
+++ b/deno/async.ts
@@ -0,0 +1,29 @@
+import { dirname, resolve } from 'https://deno.land/std/path/mod.ts'
+
+type Promisable<T> = T | Promise<T>;
+export type Callback = (directory: string, files: string[]) => Promisable<string | false | void>
+
+async function toItems(dir: string) {
+	let list = [];
+	for await (let tmp of Deno.readDir(dir)) {
+		list.push(tmp.name);
+	}
+	return list;
+}
+
+/** Requires `allow-read` permission. */
+export default async function (start: string, callback: Callback) {
+	let dir = resolve('.', start);
+	let stats = await Deno.stat(dir);
+
+	if (!stats.isDirectory) {
+		dir = dirname(dir);
+	}
+
+	while (true) {
+		let tmp = await callback(dir, await toItems(dir));
+		if (tmp) return resolve(dir, tmp);
+		dir = dirname(tmp = dir);
+		if (tmp === dir) break;
+	}
+}
diff --git a/deno/sync.ts b/deno/sync.ts
new file mode 100644
index 0000000..4e1190b
--- /dev/null
+++ b/deno/sync.ts
@@ -0,0 +1,28 @@
+import { dirname, resolve } from 'https://deno.land/std/path/mod.ts'
+
+export type Callback = (directory: string, files: string[]) => string | false | void;
+
+function toItems(dir: string) {
+	let list = [];
+	for (let tmp of Deno.readDirSync(dir)) {
+		list.push(tmp.name);
+	}
+	return list;
+}
+
+/** Requires `allow-read` permission. */
+export default function (start: string, callback: Callback) {
+	let dir = resolve('.', start);
+	let stats = Deno.statSync(dir);
+
+	if (!stats.isDirectory) {
+		dir = dirname(dir);
+	}
+
+	while (true) {
+		let tmp = callback(dir, toItems(dir));
+		if (tmp) return resolve(dir, tmp);
+		dir = dirname(tmp = dir);
+		if (tmp === dir) break;
+	}
+}
diff --git a/readme.md b/readme.md
index e47a34a..4e2195c 100644
--- a/readme.md
+++ b/readme.md
@@ -9,6 +9,12 @@ With [escalade](https://en.wikipedia.org/wiki/Escalade), you can scale parent di
 
 > **Important:**<br>Please note that `escalade` only deals with direct ancestry – it will not dive into parents' sibling directories.
 
+---
+
+**Notice:** As of v3.1.0, `escalade` now includes [Deno support](http://deno.land/x/escalade)! Please see [Deno Usage](#deno) below.
+
+---
+
 ## Install
 
 ```
@@ -177,6 +183,22 @@ If the string is an absolute path, then it's left as is. Otherwise, the string i
   escalade/sync    x  1,248 ops/sec ± 0.50% (93 runs sampled)
 ```
 
+## Deno
+
+As of v3.1.0, `escalade` is available on the Deno registry.
+
+Please note that the [API](#api) is identical and that there are still [two modes](#modes) from which to choose:
+
+```ts
+// Choose "async" mode
+import escalade from 'https://deno.land/escalade/async.ts';
+
+// Choose "sync" mode
+import escalade from 'https://deno.land/escalade/sync.ts';
+```
+
+> **Important:** The `allow-read` permission is required!
+
 
 ## Related