feat: add writeJson/writeJsonSync for fs modules (denoland/deno_std#271)

Original: e9d104a424

fs/write_json.ts

@@ -0,0 +1,57 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+/* eslint-disable @typescript-eslint/no-explicit-any */
+import * as path from "./path/mod.ts";
+type Replacer = (key: string, value: any) => any;
+
+export interface WriteJsonOptions {
+  spaces?: number | string;
+  replacer?: Array<number | string> | Replacer;
+}
+
+/* Writes an object to a JSON file. */
+export async function writeJson(
+  filePath: string,
+  object: any,
+  options: WriteJsonOptions = {}
+): Promise<void> {
+  filePath = path.resolve(filePath);
+
+  let contentRaw = "";
+
+  try {
+    contentRaw = JSON.stringify(
+      object,
+      options.replacer as string[],
+      options.spaces
+    );
+  } catch (err) {
+    err.message = `${filePath}: ${err.message}`;
+    throw err;
+  }
+
+  await Deno.writeFile(filePath, new TextEncoder().encode(contentRaw));
+}
+
+/* Writes an object to a JSON file. */
+export function writeJsonSync(
+  filePath: string,
+  object: any,
+  options: WriteJsonOptions = {}
+): void {
+  filePath = path.resolve(filePath);
+
+  let contentRaw = "";
+
+  try {
+    contentRaw = JSON.stringify(
+      object,
+      options.replacer as string[],
+      options.spaces
+    );
+  } catch (err) {
+    err.message = `${filePath}: ${err.message}`;
+    throw err;
+  }
+
+  Deno.writeFileSync(filePath, new TextEncoder().encode(contentRaw));
+}