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fix(env): strip null bytes from .env before python-dotenv loads

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Null bytes in API key values (introduced by copy-paste) crash
    os.environ[k] = v with ValueError: embedded null byte, preventing
    hermes from starting at all.
This commit is contained in:
Yuan Li 2026-05-20 23:06:58 +08:00 • committed by Teknium
parent 514a4eff36
commit 75643a6154
2 changed files with 26 additions and 1 deletions
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17
tests/hermes_cli/test_env_loader.py
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@ -70,6 +70,23 @@ def test_user_env_takes_precedence_over_project_env(tmp_path, monkeypatch):
assert os.getenv("OPENAI_API_KEY") == "project-key"
def test_null_bytes_in_user_env_are_stripped(tmp_path, monkeypatch):
home = tmp_path / "hermes"
home.mkdir()
env_file = home / ".env"
# Null bytes can be introduced when copy-pasting API keys.
env_file.write_text("GLM_API_KEY=abc\x00\x00\nOPENAI_API_KEY=sk-123\n", encoding="utf-8")
monkeypatch.delenv("GLM_API_KEY", raising=False)
monkeypatch.delenv("OPENAI_API_KEY", raising=False)
loaded = load_hermes_dotenv(hermes_home=home)
assert loaded == [env_file]
assert os.getenv("GLM_API_KEY") == "abc"
assert os.getenv("OPENAI_API_KEY") == "sk-123"
def test_main_import_applies_user_env_over_shell_values(tmp_path, monkeypatch):
home = tmp_path / "hermes"
home.mkdir()