def read_tox_ini()

in container_images/pytest/main.py [0:0]

• 27 lines of code
• 6 McCabe index (conditional complexity)

def read_tox_ini(repo_root: Path, package_root: Path) -> TestConfig:
  """Read pyproject.toml and write a new tox.ini file.

  The tox.ini file is generated to ensure that tests are run consistently,
  and that test reports are written to the correct location.
  """
  cfg = package_root / "pyproject.toml"
  assert cfg.exists(), "Expected pyproject.toml to exist."

  with cfg.open() as f:
    project_cfg = toml.load(f)

  # Read the [tool.gcp-guest-pytest] section of pyproject.toml.
  test_cfg = project_cfg.get("tool", {}).get("gcp-guest-pytest", {})

  # Which interpreters to enable.
  envlist = [to_tox_version(env) for env in test_cfg.get("envlist", [])]

  if not envlist:
    raise ValueError(
      "pyproject.toml must contain a section [tool.gcp-guest-pytest] "
      "with a key `envlist` and at least one interpreter.")

  pip_deps, local_deps = [], []
  for dep in test_cfg.get("test-deps", []):
    if dep.startswith("//"):
      local = dep[2:]
      if not (repo_root / local).exists():
        raise ValueError("Dependency {} not found".format(dep))
      local_deps.append(local)
    else:
      pip_deps.append(dep)

  return TestConfig(
      repo_root=repo_root,
      package_root=package_root,
      envlist=envlist,
      pip_deps=pip_deps,
      local_deps=local_deps
  )