Fix(bundler): allow generating exe file in nested path. (#4226)

* Fix(bundler): allow generating binary file in nested path.
Close: #4195

* Add read flag for fd.

* refactor

1 files changed, 40 insertions, 1 deletions

diff --git a/test/bundler/cli.test.ts b/test/bundler/cli.test.ts
index e2f99a9ed..3df2ab75e 100644
--- a/test/bundler/cli.test.ts
+++ b/test/bundler/cli.test.ts
@@ -1,6 +1,8 @@
 import { bunEnv, bunExe } from "harness";
-import path from "path";
 import { describe, expect, test } from "bun:test";
+import fs from "node:fs";
+import { tmpdir } from "node:os";
+import path from "node:path";
 
 describe("bun build", () => {
   test("warnings dont return exit code 1", () => {
@@ -13,4 +15,41 @@ describe("bun build", () => {
       'warn: "key" prop before a {...spread} is deprecated in JSX. Falling back to classic runtime.',
     );
   });
+
+  test("generating a standalone binary in nested path, issue #4195", () => {
+    function testCompile(outfile: string) {
+      const { exitCode } = Bun.spawnSync({
+        cmd: [
+          bunExe(),
+          "build",
+          path.join(import.meta.dir, "./fixtures/trivial/index.js"),
+          "--compile",
+          "--outfile",
+          outfile,
+        ],
+        env: bunEnv,
+      });
+      expect(exitCode).toBe(0);
+    }
+    function testExec(outfile: string) {
+      const { exitCode } = Bun.spawnSync({
+        cmd: [outfile],
+      });
+      expect(exitCode).toBe(0);
+    }
+    {
+      const baseDir = `${tmpdir()}/bun-build-outfile-${Date.now()}`;
+      const outfile = path.join(baseDir, "index.exe");
+      testCompile(outfile);
+      testExec(outfile);
+      fs.rmSync(baseDir, { recursive: true, force: true });
+    }
+    {
+      const baseDir = `${tmpdir()}/bun-build-outfile2-${Date.now()}`;
+      const outfile = path.join(baseDir, "b/u/n", "index.exe");
+      testCompile(outfile);
+      testExec(outfile);
+      fs.rmSync(baseDir, { recursive: true, force: true });
+    }
+  });
 });