[Build] Fix API rate limit exceeded when using `VLLM_USE_PRECOMPILED=1` (#36229)

Signed-off-by: elvischenv <219235043+elvischenv@users.noreply.github.com>
Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>
Co-authored-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>

setup.py

@@ -657,13 +657,18 @@ class precompiled_wheel_utils:
     def get_base_commit_in_main_branch() -> str:
         try:
             # Get the latest commit hash of the upstream main branch.
-            resp_json = subprocess.check_output(
-                [
-                    "curl",
-                    "-s",
-                    "https://api.github.com/repos/vllm-project/vllm/commits/main",
+            curl_cmd = [
+                "curl",
+                "-s",
+                "https://api.github.com/repos/vllm-project/vllm/commits/main",
+            ]
+            github_token = os.getenv("GH_TOKEN", os.getenv("GITHUB_TOKEN"))
+            if github_token:
+                curl_cmd += [
+                    "-H",
+                    f"Authorization: token {github_token}",
                 ]
-            ).decode("utf-8")
+            resp_json = subprocess.check_output(curl_cmd).decode("utf-8")
             upstream_main_commit = json.loads(resp_json)["sha"]
             print(f"Upstream main branch latest commit: {upstream_main_commit}")