root_scripts/check_verl_structure.py

import os, sys

# 1. Find veRL install location
import verl
verl_dir = os.path.dirname(verl.__file__)
print(f"veRL dir: {verl_dir}")

# 2. Check main_ppo entry point
main_ppo = os.path.join(verl_dir, "trainer", "main_ppo.py")
if os.path.exists(main_ppo):
    with open(main_ppo) as f:
        content = f.read()
    print(f"\nmain_ppo.py ({len(content)} chars):")
    for i, line in enumerate(content.split("\n"), 1):
        if any(k in line.lower() for k in ["compute_score", "reward", "data_domain", "def run", "def main"]):
            print(f"  L{i}: {line.rstrip()[:100]}")
else:
    print(f"main_ppo.py not found at {main_ppo}")

# 3. Check model registry
reg = os.path.join(verl_dir, "models", "registry.py")
if os.path.exists(reg):
    with open(reg) as f:
        lines = f.readlines()
    print(f"\nregistry.py ({len(lines)} lines):")
    for i, line in enumerate(lines, 1):
        if "qwen" in line.lower() or "supported" in line.lower() or "rmpad" in line.lower():
            print(f"  L{i}: {line.rstrip()[:100]}")

# 4. Check vLLM third_party
tp = os.path.join(verl_dir, "third_party", "vllm")
if os.path.isdir(tp):
    print(f"\nthird_party/vllm/ contents:")
    for f in os.listdir(tp):
        print(f"  {f}")
    init = os.path.join(tp, "__init__.py")
    if os.path.exists(init):
        with open(init) as fh:
            content = fh.read()
        print(f"\nvllm __init__.py ({len(content)} chars):")
        for i, line in enumerate(content.split("\n"), 1):
            if any(k in line for k in ["version", "import", "0.6", "0.7", "spmd", "qwen"]):
                print(f"  L{i}: {line.rstrip()[:100]}")
else:
    print(f"\nNo third_party/vllm dir")

# 5. Check if there's a reward_score util
rs = os.path.join(verl_dir, "utils", "reward_score")
if os.path.isdir(rs):
    print(f"\nutils/reward_score/ contents:")
    for root, dirs, files in os.walk(rs):
        for f in files:
            print(f"  {os.path.relpath(os.path.join(root, f), rs)}")