fs: make mkdtemp accept buffers and URL

doc/api/fs.md

@@ -1159,14 +1159,17 @@ makeDirectory().catch(console.error);
 <!-- YAML
 added: v10.0.0
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/48828
+    description: The `prefix` parameter now accepts buffers and URL.
   - version:
       - v16.5.0
       - v14.18.0
     pr-url: https://github.com/nodejs/node/pull/39028
     description: The `prefix` parameter now accepts an empty string.
 -->
 
-* `prefix` {string}
+* `prefix` {string|Buffer|URL}
 * `options` {string|Object}
   * `encoding` {string} **Default:** `'utf8'`
 * Returns: {Promise}  Fulfills with a string containing the file system path
@@ -3244,6 +3247,9 @@ See the POSIX mkdir(2) documentation for more details.
 <!-- YAML
 added: v5.10.0
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/48828
+    description: The `prefix` parameter now accepts buffers and URL.
   - version: v18.0.0
     pr-url: https://github.com/nodejs/node/pull/41678
     description: Passing an invalid callback to the `callback` argument
@@ -3267,7 +3273,7 @@ changes:
     description: The `callback` parameter is optional now.
 -->
 
-* `prefix` {string}
+* `prefix` {string|Buffer|URL}
 * `options` {string|Object}
   * `encoding` {string} **Default:** `'utf8'`
 * `callback` {Function}
@@ -5550,14 +5556,17 @@ See the POSIX mkdir(2) documentation for more details.
 <!-- YAML
 added: v5.10.0
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/48828
+    description: The `prefix` parameter now accepts buffers and URL.
   - version:
       - v16.5.0
       - v14.18.0
     pr-url: https://github.com/nodejs/node/pull/39028
     description: The `prefix` parameter now accepts an empty string.
 -->
 
-* `prefix` {string}
+* `prefix` {string|Buffer|URL}
 * `options` {string|Object}
   * `encoding` {string} **Default:** `'utf8'`
 * Returns: {string}

lib/fs.js

@@ -2902,7 +2902,7 @@ realpath.native = (path, options, callback) => {
 
 /**
  * Creates a unique temporary directory.
- * @param {string} prefix
+ * @param {string | Buffer | URL} prefix
  * @param {string | { encoding?: string; }} [options]
  * @param {(
  *   err?: Error,
@@ -2914,8 +2914,7 @@ function mkdtemp(prefix, options, callback) {
   callback = makeCallback(typeof options === 'function' ? options : callback);
   options = getOptions(options);
 
-  validateString(prefix, 'prefix');
-  nullCheck(prefix, 'prefix');
+  prefix = getValidatedPath(prefix, 'prefix');
   warnOnNonPortableTemplate(prefix);
   const req = new FSReqCallback();
   req.oncomplete = callback;
@@ -2924,15 +2923,14 @@ function mkdtemp(prefix, options, callback) {
 
 /**
  * Synchronously creates a unique temporary directory.
- * @param {string} prefix
+ * @param {string | Buffer | URL} prefix
  * @param {string | { encoding?: string; }} [options]
  * @returns {string}
  */
 function mkdtempSync(prefix, options) {
   options = getOptions(options);
 
-  validateString(prefix, 'prefix');
-  nullCheck(prefix, 'prefix');
+  prefix = getValidatedPath(prefix, 'prefix');
   warnOnNonPortableTemplate(prefix);
   const path = `${prefix}XXXXXX`;
   const ctx = { path };

lib/internal/fs/promises.js

@@ -59,7 +59,6 @@ const {
   getStatsFromBinding,
   getValidatedPath,
   getValidMode,
-  nullCheck,
   preprocessSymlinkDestination,
   stringToFlags,
   stringToSymlinkType,
@@ -994,8 +993,7 @@ async function realpath(path, options) {
 async function mkdtemp(prefix, options) {
   options = getOptions(options);
 
-  validateString(prefix, 'prefix');
-  nullCheck(prefix);
+  prefix = getValidatedPath(prefix, 'prefix');
   warnOnNonPortableTemplate(prefix);
   return binding.mkdtemp(`${prefix}XXXXXX`, options.encoding, kUsePromises);
 }

lib/internal/fs/utils.js

@@ -749,7 +749,7 @@ let nonPortableTemplateWarn = true;
 function warnOnNonPortableTemplate(template) {
   // Template strings passed to the mkdtemp() family of functions should not
   // end with 'X' because they are handled inconsistently across platforms.
-  if (nonPortableTemplateWarn && StringPrototypeEndsWith(template, 'X')) {
+  if (nonPortableTemplateWarn && StringPrototypeEndsWith(`${template}`, 'X')) {
     process.emitWarning('mkdtemp() templates ending with X are not portable. ' +
                         'For details see: https://nodejs.org/api/fs.html');
     nonPortableTemplateWarn = false;

test/parallel/test-fs-mkdtemp.js

@@ -8,29 +8,55 @@ const path = require('path');
 const tmpdir = require('../common/tmpdir');
 tmpdir.refresh();
 
-const tmpFolder = fs.mkdtempSync(path.join(tmpdir.path, 'foo.'));
-
-assert.strictEqual(path.basename(tmpFolder).length, 'foo.XXXXXX'.length);
-assert(fs.existsSync(tmpFolder));
-
-const utf8 = fs.mkdtempSync(path.join(tmpdir.path, '\u0222abc.'));
-assert.strictEqual(Buffer.byteLength(path.basename(utf8)),
-                   Buffer.byteLength('\u0222abc.XXXXXX'));
-assert(fs.existsSync(utf8));
-
 function handler(err, folder) {
   assert.ifError(err);
   assert(fs.existsSync(folder));
   assert.strictEqual(this, undefined);
 }
 
-fs.mkdtemp(path.join(tmpdir.path, 'bar.'), common.mustCall(handler));
+{
+  const tmpFolder = fs.mkdtempSync(path.join(tmpdir.path, 'foo.'));
+
+  assert.strictEqual(path.basename(tmpFolder).length, 'foo.XXXXXX'.length);
+  assert(fs.existsSync(tmpFolder));
 
-// Same test as above, but making sure that passing an options object doesn't
-// affect the way the callback function is handled.
-fs.mkdtemp(path.join(tmpdir.path, 'bar.'), {}, common.mustCall(handler));
+  const utf8 = fs.mkdtempSync(path.join(tmpdir.path, '\u0222abc.'));
+  assert.strictEqual(Buffer.byteLength(path.basename(utf8)),
+                     Buffer.byteLength('\u0222abc.XXXXXX'));
+  assert(fs.existsSync(utf8));
+
+  fs.mkdtemp(path.join(tmpdir.path, 'bar.'), common.mustCall(handler));
+
+  // Same test as above, but making sure that passing an options object doesn't
+  // affect the way the callback function is handled.
+  fs.mkdtemp(path.join(tmpdir.path, 'bar.'), {}, common.mustCall(handler));
+
+  const warningMsg = 'mkdtemp() templates ending with X are not portable. ' +
+                     'For details see: https://nodejs.org/api/fs.html';
+  common.expectWarning('Warning', warningMsg);
+  fs.mkdtemp(path.join(tmpdir.path, 'bar.X'), common.mustCall(handler));
+}
 
-const warningMsg = 'mkdtemp() templates ending with X are not portable. ' +
-                   'For details see: https://nodejs.org/api/fs.html';
-common.expectWarning('Warning', warningMsg);
-fs.mkdtemp(path.join(tmpdir.path, 'bar.X'), common.mustCall(handler));
+{
+  tmpdir.url = new URL(`file://${tmpdir.path}`);
+  const urljoin = (base, path) => new URL(path, base);
+
+  const tmpFolder = fs.mkdtempSync(urljoin(tmpdir.url, 'foo.'));
+
+  assert.strictEqual(path.basename(tmpFolder).length, 'foo.XXXXXX'.length);
+  assert(fs.existsSync(tmpFolder));
+
+  const utf8 = fs.mkdtempSync(urljoin(tmpdir.url, '\u0222abc.'));
+  assert.strictEqual(Buffer.byteLength(path.basename(utf8)),
+                     Buffer.byteLength('\u0222abc.XXXXXX'));
+  assert(fs.existsSync(utf8));
+
+  fs.mkdtemp(urljoin(tmpdir.url, 'bar.'), common.mustCall(handler));
+
+  // Same test as above, but making sure that passing an options object doesn't
+  // affect the way the callback function is handled.
+  fs.mkdtemp(urljoin(tmpdir.url, 'bar.'), {}, common.mustCall(handler));
+
+  // Warning fires only once
+  fs.mkdtemp(urljoin(tmpdir.url, 'bar.X'), common.mustCall(handler));
+}