refactor: migrate codebase to TypeScript

Author: fraxken

index.d.ts

@@ -2,10 +2,17 @@
   "name": "@nodesecure/fs-walk",
   "version": "1.0.0",
   "description": "Modern FileSystem (fs) utilities to lazy walk directories Asynchronously (but also Synchronously)",
-  "exports": "./index.js",
+  "exports": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "type": "module",
+  "engines": {
+    "node": ">=18.0.0"
+  },
   "scripts": {
-    "lint": "eslint index.js",
-    "test-only": "node --test",
+    "build": "tsc",
+    "prepublishOnly": "npm run build",
+    "lint": "eslint src/**/*.ts test/**/*.ts",
+    "test-only": "glob -c \"tsx --test\" \"./test/**/*.spec.ts\"",
     "test": "npm run lint && npm run test-only",
     "coverage": "c8 -r html npm test"
   },
@@ -24,21 +31,20 @@
   ],
   "author": "GENTILHOMME Thomas <[email protected]>",
   "files": [
-    "index.d.ts",
-    "index.js",
-    "type"
+    "dist"
   ],
   "license": "MIT",
   "bugs": {
     "url": "https://github.com/NodeSecure/fs-walk/issues"
   },
   "homepage": "https://github.com/NodeSecure/fs-walk#readme",
   "devDependencies": {
-    "@nodesecure/eslint-config": "^1.7.0",
-    "c8": "^8.0.0"
-  },
-  "type": "module",
-  "engines": {
-    "node": ">=18.0.0"
+    "@nodesecure/eslint-config": "^1.9.0",
+    "@types/node": "^20.11.28",
+    "c8": "^8.0.1",
+    "eslint": "^8.57.0",
+    "glob": "^10.3.10",
+    "tsx": "^4.7.1",
+    "typescript": "^5.4.2"
   }
 }

index.js

@@ -0,0 +1,6 @@
+
+export const EXCLUDED_DIRECTORY = new Set([
+  "node_modules",
+  ".vscode",
+  ".git"
+]);

package.json

@@ -0,0 +1,3 @@
+export * from "./walk.js";
+export * from "./walkSync.js";
+export * from "./types.js";

src/constants.ts

@@ -0,0 +1,8 @@
+// Import Node.js Dependencies
+import { Dirent } from "node:fs";
+
+export interface WalkOptions {
+  extensions?: Set<string>;
+}
+
+export type WalkResult = [dirent: Dirent, absoluteFileLocation: string];

src/index.ts

@@ -0,0 +1,45 @@
+// Import Node.js Dependencies
+import fs from "node:fs/promises";
+import path from "node:path";
+
+// Import Internal Dependencies
+import { EXCLUDED_DIRECTORY } from "./constants.js";
+import type { WalkOptions, WalkResult } from "./types.js";
+
+/**
+ * @example
+ * import { walk } from "@nodesecure/fs-walk";
+ *
+ * for await (const [dirent, location] of walk(__dirname) {
+ *  if (dirent.isFile()) {
+ *    console.log(location);
+ *  }
+ * }
+ */
+export async function* walk(
+  directory: string,
+  options: WalkOptions = Object.create(null)
+): AsyncIterableIterator<WalkResult> {
+  const extensions = options?.extensions ?? null;
+  const dirents = await fs.opendir(directory);
+
+  for await (const dirent of dirents) {
+    if (EXCLUDED_DIRECTORY.has(dirent.name)) {
+      continue;
+    }
+
+    if (dirent.isFile()) {
+      if (extensions !== null && !extensions.has(path.extname(dirent.name))) {
+        continue;
+      }
+
+      yield [dirent, path.join(directory, dirent.name)];
+    }
+    else if (dirent.isDirectory()) {
+      const subDirectoryLocation = path.join(directory, dirent.name);
+
+      yield [dirent, subDirectoryLocation];
+      yield* walk(subDirectoryLocation, options);
+    }
+  }
+}

src/types.ts

@@ -0,0 +1,45 @@
+// Import Node.js Dependencies
+import fs from "node:fs";
+import path from "node:path";
+
+// Import Internal Dependencies
+import { EXCLUDED_DIRECTORY } from "./constants.js";
+import type { WalkOptions, WalkResult } from "./types.js";
+
+/**
+ * @example
+ * import { walkSync, FILE } from "@nodesecure/fs-walk";
+ *
+ * for (const [type, location] of walkSync(__dirname) {
+ *  if (type === FILE) {
+ *    console.log(location);
+ *  }
+ * }
+ */
+export function* walkSync(
+  directory: string,
+  options: WalkOptions = Object.create(null)
+): IterableIterator<WalkResult> {
+  const extensions = options?.extensions ?? null;
+  const dirents = fs.readdirSync(directory, { withFileTypes: true });
+
+  for (const dirent of dirents) {
+    if (EXCLUDED_DIRECTORY.has(dirent.name)) {
+      continue;
+    }
+
+    if (dirent.isFile()) {
+      if (extensions !== null && !extensions.has(path.extname(dirent.name))) {
+        continue;
+      }
+
+      yield [dirent, path.join(directory, dirent.name)];
+    }
+    else if (dirent.isDirectory()) {
+      const subDirectoryLocation = path.join(directory, dirent.name);
+
+      yield [dirent, subDirectoryLocation];
+      yield* walkSync(subDirectoryLocation, options);
+    }
+  }
+}

src/walk.ts

@@ -0,0 +1,70 @@
+// Import Node.js Dependencies
+import { describe, it } from "node:test";
+import assert from "node:assert";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+
+// Import Internal Dependencies
+import { walk, walkSync } from "../src/index.js";
+
+// CONSTANTS
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
+const kRootLocation = path.join(__dirname, "..");
+const kFixturesDir = path.join(__dirname, "fixtures");
+
+const kExpectedJSFiles = [
+  "src/index.ts",
+  "src/constants.ts",
+  "src/types.ts",
+  "src/walk.ts",
+  "src/walkSync.ts",
+  "test/walk.spec.ts"
+]
+  .map((fileLocation) => path.normalize(fileLocation))
+  .sort();
+
+describe("walk", () => {
+  it("should return all TypeScript files of the package", async() => {
+    const files: string[] = [];
+    const options = { extensions: new Set([".ts"]) };
+
+    for await (const [dirent, absoluteFileLocation] of walk(
+      kRootLocation,
+      options
+    )) {
+      if (dirent.isFile()) {
+        files.push(path.relative(kRootLocation, absoluteFileLocation));
+      }
+    }
+
+    assert.deepEqual(files.sort(), kExpectedJSFiles);
+  });
+});
+
+describe("walkSync", () => {
+  it("should return all TypeScript files of the package", () => {
+    const options = { extensions: new Set([".ts"]) };
+
+    const files = [...walkSync(kRootLocation, options)]
+      .filter(([dirent]) => dirent.isFile())
+      .map(([, absoluteFileLocation]) => path.relative(kRootLocation, absoluteFileLocation));
+
+    assert.deepEqual(files, kExpectedJSFiles);
+  });
+
+  it("should return all files in the fixtures directory", () => {
+    const files = [...walkSync(kFixturesDir)]
+      .filter(([dirent]) => dirent.isFile())
+      .map(([, absoluteFileLocation]) => path.relative(kRootLocation, absoluteFileLocation));
+
+    const expectedFiles = [
+      "test/fixtures/foobar.txt",
+      "test/fixtures/test.md"
+    ].map((fileLocation) => path.normalize(fileLocation));
+
+    assert.deepEqual(files, expectedFiles);
+  });
+});
+
+