feat: add deno.makeTempDir

1 files changed, 74 insertions, 0 deletions

diff --git a/js/make_temp_dir.ts b/js/make_temp_dir.ts
new file mode 100644
index 000000000..b252be381
--- /dev/null
+++ b/js/make_temp_dir.ts
@@ -0,0 +1,74 @@
+// Copyright 2018 the Deno authors. All rights reserved. MIT license.
+import * as fbs from "gen/msg_generated";
+import { flatbuffers } from "flatbuffers";
+import * as dispatch from "./dispatch";
+import { assert } from "./util";
+
+export interface MakeTempDirOptions {
+  dir?: string;
+  prefix?: string;
+  suffix?: string;
+}
+
+/**
+ * makeTempDirSync is the synchronous version of `makeTempDir`.
+ *
+ *     import { makeTempDirSync } from "deno";
+ *     const tempDirName0 = makeTempDirSync();
+ *     const tempDirName1 = makeTempDirSync({ prefix: 'my_temp' });
+ */
+export function makeTempDirSync(options: MakeTempDirOptions = {}): string {
+  return res(dispatch.sendSync(...req(options)));
+}
+
+/**
+ * makeTempDir creates a new temporary directory in the directory `dir`, its
+ * name beginning with `prefix` and ending with `suffix`.
+ * It returns the full path to the newly created directory.
+ * If `dir` is unspecified, tempDir uses the default directory for temporary
+ * files. Multiple programs calling tempDir simultaneously will not choose the
+ * same directory. It is the caller's responsibility to remove the directory
+ * when no longer needed.
+ *
+ *     import { makeTempDir } from "deno";
+ *     const tempDirName0 = await makeTempDir();
+ *     const tempDirName1 = await makeTempDir({ prefix: 'my_temp' });
+ */
+export async function makeTempDir(
+  options: MakeTempDirOptions = {}
+): Promise<string> {
+  return res(await dispatch.sendAsync(...req(options)));
+}
+
+function req({
+  dir,
+  prefix,
+  suffix
+}: MakeTempDirOptions): [flatbuffers.Builder, fbs.Any, flatbuffers.Offset] {
+  const builder = new flatbuffers.Builder();
+  const fbDir = dir == null ? -1 : builder.createString(dir);
+  const fbPrefix = prefix == null ? -1 : builder.createString(prefix);
+  const fbSuffix = suffix == null ? -1 : builder.createString(suffix);
+  fbs.MakeTempDir.startMakeTempDir(builder);
+  if (dir != null) {
+    fbs.MakeTempDir.addDir(builder, fbDir);
+  }
+  if (prefix != null) {
+    fbs.MakeTempDir.addPrefix(builder, fbPrefix);
+  }
+  if (suffix != null) {
+    fbs.MakeTempDir.addSuffix(builder, fbSuffix);
+  }
+  const msg = fbs.MakeTempDir.endMakeTempDir(builder);
+  return [builder, fbs.Any.MakeTempDir, msg];
+}
+
+function res(baseRes: null | fbs.Base): string {
+  assert(baseRes != null);
+  assert(fbs.Any.MakeTempDirRes === baseRes!.msgType());
+  const res = new fbs.MakeTempDirRes();
+  assert(baseRes!.msg(res) != null);
+  const path = res.path();
+  assert(path != null);
+  return path!;
+}