import type { DefineValueType, TargetOption, WarningLevelOption } from './Plugin';
export declare class Environment {
    readonly context: string;
    readonly fs: any;
    readonly target: TargetOption;
    readonly globalObject: string | undefined;
    /** All names and values that parsed from {@link PluginOptions.defs}. */
    readonly defines: Map<string, string>;
    /** Constant names and values. */
    readonly constants: Map<string, DefineValueType>;
    readonly warningLevel: WarningLevelOption;
    readonly logTransformed: boolean;
    /**
     * @param options.context - An absolute directory used to resolve the relative pattern to absolute.
     * @param options.fs - User provided file system, defaults to fs-extra.
     * @param options.target - Closure module transform target, "esm" or "commonjs", defaults to "esm".
     * @param options.defines - List of string and value to override the goog.define expression, if the name part is omitted, its value will be true.
     * The value could be string, boolean and number.
     * @param warningLevel - "show" show all warnings, "hidelib" hide warnings in Closure library modules and show warnings in user modules, "hideUser" opposite "hideLib", "hide" hide all warnings, defualts to "hideLib".
     * @param options.logTransformed - Enable log transformed Closure module to build directory, defaults to false.
     */
    constructor(options: {
        context: string;
        fs?: any;
        target?: TargetOption;
        globalObject?: string;
        defines?: any[];
        warningLevel?: WarningLevelOption;
        logTransformed?: boolean;
    });
}