feat: add ensureDir/ensureFile for fs modules (denoland/deno_std#264)

Original: https://github.com/denoland/deno_std/commit/9ae941338aea09adf0d4f48d40f2b09131ae3d5f

1 files changed, 42 insertions, 0 deletions

diff --git a/fs/ensure_file.ts b/fs/ensure_file.ts
new file mode 100644
index 000000000..ef0af5300
--- /dev/null
+++ b/fs/ensure_file.ts
@@ -0,0 +1,42 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+import * as path from "./path/mod.ts";
+import { ensureDir, ensureDirSync } from "./ensure_dir.ts";
+/**
+ * Ensures that the file exists.
+ * If the file that is requested to be created is in directories that do not exist, these directories are created. If the file already exists, it is NOT MODIFIED.
+ * @export
+ * @param {string} filePath
+ * @returns {Promise<void>}
+ */
+export async function ensureFile(filePath: string): Promise<void> {
+  try {
+    // if file exists
+    await Deno.stat(filePath);
+  } catch {
+    // if file not exists
+    // ensure dir exists
+    await ensureDir(path.dirname(filePath));
+    // create file
+    await Deno.writeFile(filePath, new Uint8Array());
+  }
+}
+
+/**
+ * Ensures that the file exists.
+ * If the file that is requested to be created is in directories that do not exist, these directories are created. If the file already exists, it is NOT MODIFIED.
+ * @export
+ * @param {string} filePath
+ * @returns {void}
+ */
+export function ensureFileSync(filePath: string): void {
+  try {
+    // if file exists
+    Deno.statSync(filePath);
+  } catch {
+    // if file not exists
+    // ensure dir exists
+    ensureDirSync(path.dirname(filePath));
+    // create file
+    Deno.writeFileSync(filePath, new Uint8Array());
+  }
+}