def derive_changeset()

in src/utils.py [0:0]

• 23 lines of code
• 11 McCabe index (conditional complexity)

def derive_changeset(target_version_dir, source_version_dir, image_config) -> (dict[str, list[str]], dict[str, str]):
    env_in_file_name = image_config["build_args"]["ENV_IN_FILENAME"]
    env_out_file_name = image_config["env_out_filename"]
    required_packages_from_target = get_match_specs(target_version_dir + "/" + env_in_file_name).keys()
    target_match_spec_out = get_match_specs(target_version_dir + "/" + env_out_file_name)
    source_match_spec_out = get_match_specs(source_version_dir + "/" + env_out_file_name)

    # Note: required_packages_from_source is not currently used.
    # In the future, If we remove any packages from env.in, at that time required_packages_from_source will be needed.
    # We only care about the packages which are present in the target version env.in file
    installed_packages_from_target = {
        k: str(v.get("version")).removeprefix("==")
        for k, v in target_match_spec_out.items()
        if k in required_packages_from_target
    }
    # Note: A required package in the target version might not be a required package in the source version
    # But source version could still have this package pulled as a dependency of a dependency.
    installed_packages_from_source = {
        k: str(v.get("version")).removeprefix("==")
        for k, v in source_match_spec_out.items()
        if k in required_packages_from_target
    }
    upgrades = {
        k: [installed_packages_from_source[k], v]
        for k, v in installed_packages_from_target.items()
        if k in installed_packages_from_source and installed_packages_from_source[k] != v
    }
    new_packages = {k: v for k, v in installed_packages_from_target.items() if k not in installed_packages_from_source}
    # TODO: Add support for removed packages.
    return upgrades, new_packages