def decide_which_bazel_version_to_use()

in bazelisk.py [0:0]

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

def decide_which_bazel_version_to_use():
    # Check in this order:
    # - env var "USE_BAZEL_VERSION" is set to a specific version.
    # - env var "USE_NIGHTLY_BAZEL" or "USE_BAZEL_NIGHTLY" is set -> latest
    #   nightly. (TODO)
    # - env var "USE_CANARY_BAZEL" or "USE_BAZEL_CANARY" is set -> latest
    #   rc. (TODO)
    # - the file workspace_root/tools/bazel exists -> that version. (TODO)
    # - workspace_root/.bazelversion exists -> read contents, that version.
    # - workspace_root/WORKSPACE contains a version -> that version. (TODO)
    # - fallback: latest release
    if "USE_BAZEL_VERSION" in os.environ:
        return os.environ["USE_BAZEL_VERSION"]

    workspace_root = find_workspace_root()
    if workspace_root:
        bazelversion_path = os.path.join(workspace_root, ".bazelversion")
        if os.path.exists(bazelversion_path):
            with open(bazelversion_path, "r") as f:
                return f.read().strip()

    return "latest"