feat: add phase 6 js_library and ts_library bootstrap

tests/library_test/BUILD.bazel

@@ -0,0 +1,41 @@
+load("//bun:defs.bzl", "bun_bundle", "bun_test", "ts_library")
+
+ts_library(
+    name = "helper_lib",
+    srcs = ["helper.ts"],
+    target_compatible_with = [
+        "@platforms//cpu:x86_64",
+        "@platforms//os:linux",
+    ],
+)
+
+bun_bundle(
+    name = "bundle_with_deps",
+    entry_points = ["app.ts"],
+    deps = [":helper_lib"],
+    target_compatible_with = [
+        "@platforms//cpu:x86_64",
+        "@platforms//os:linux",
+    ],
+)
+
+sh_test(
+    name = "bundle_dep_propagation_test",
+    srcs = ["verify_bundle.sh"],
+    args = ["$(location :bundle_with_deps)"],
+    data = [":bundle_with_deps"],
+    target_compatible_with = [
+        "@platforms//cpu:x86_64",
+        "@platforms//os:linux",
+    ],
+)
+
+bun_test(
+    name = "test_with_deps",
+    srcs = ["app.test.ts"],
+    deps = [":helper_lib"],
+    target_compatible_with = [
+        "@platforms//cpu:x86_64",
+        "@platforms//os:linux",
+    ],
+)

tests/library_test/app.test.ts

@@ -0,0 +1,6 @@
+import { expect, test } from "bun:test";
+import { greeting } from "./helper";
+
+test("uses helper from ts_library dep", () => {
+  expect(greeting("test")).toBe("hello-test");
+});

tests/library_test/app.ts

@@ -0,0 +1,3 @@
+import { greeting } from "./helper";
+
+console.log(greeting("bundle"));

tests/library_test/helper.ts

@@ -0,0 +1,3 @@
+export function greeting(name: string): string {
+  return `hello-${name}`;
+}

tests/library_test/verify_bundle.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+bundle="$1"
+
+if [[ ! -s "${bundle}" ]]; then
+  echo "Expected bundled output to exist and be non-empty: ${bundle}" >&2
+  exit 1
+fi