import { ModuleFormat as RollupFormat, InputOptions, OutputOptions, Plugin as RollupPlugin } from 'rollup';
import { Banner } from './utils/get-banner';
declare type Diff<T extends keyof any, U extends keyof any> = ({
    [P in T]: P;
} & {
    [P in U]: never;
} & {
    [x: string]: never;
})[T];
declare type Overwrite<T, U> = Pick<T, Diff<keyof T, keyof U>> & U;
export declare type Format = RollupFormat | 'cjs-min' | 'es-min' | 'esm-min' | 'umd-min' | 'iife-min' | 'amd-min' | 'system-min';
export declare type Env = {
    [k: string]: string | number | boolean;
};
export declare type External = string | RegExp | ((id: string, parentId?: string) => boolean);
export declare type Externals = Array<External>;
export declare type ConfigEntryObject = {
    [entryName: string]: string;
};
export declare type ExtendConfig = (config: NormalizedConfig, { format, input }: {
    format: Format;
    input: string[] | ConfigEntryObject;
}) => NormalizedConfig;
export interface RunContext {
    unresolved: Set<string>;
}
export interface Task {
    title: string;
    getConfig(context: RunContext, task: Task): Promise<RollupConfig>;
}
export interface RollupInputConfig extends InputOptions {
    plugins: Array<RollupPlugin>;
}
export interface RollupOutputConfig extends OutputOptions {
    dir: string;
}
export interface RollupConfig {
    inputConfig: RollupInputConfig;
    outputConfig: RollupOutputConfig;
}
export declare type ExtendRollupConfig = (config: RollupConfig) => RollupConfig;
export interface FileNameContext {
    format: RollupFormat;
    minify: boolean;
}
export declare type GetFileName = (context: FileNameContext, defaultFileName: string) => string;
export interface BabelPresetOptions {
    /**
     * Transform `async/await` to `Promise`.
     * @default `true`
     */
    asyncToPromises?: boolean;
    /**
     * Custom JSX pragma. If you want to use Preact, set it to `h`.
     */
    jsx?: string;
    /**
     * Replace `Object.assign` with your own method.
     * @example `myAssign`
     */
    objectAssign?: string;
    /**
     * Disable .babelrc
     * By default Bili reads it
     */
    babelrc?: boolean;
    /**
     * Disable babel.config.js
     */
    configFile?: boolean;
    /**
     * Disable babel-preset-env but still use other babel plugins
     * In addtional we use rollup-plugin-buble after rollup-plugin-babel
     */
    minimal?: boolean;
}
export declare type OutputTarget = 'node' | 'browser';
export interface ConfigOutput {
    /**
     * Output format(s). You can append `min` to the format to generate minified bundle.
     *
     * @default `cjs`
     * @cli `--format <format>`
     */
    format?: Format | Format[];
    /**
     * Output directory
     * @default `dist`
     * @cli `-d, --out-dir <dir>`
     */
    dir?: string;
    /**
     * Output file name
     *
     * Default value:
     * - `[name][min][ext]` in `cjs` and `esm` format.
     * - `[name][min].[format].js` in other formats.
     *
     * Placeholders:
     * - `[name]`: The base name of input file. (without extension)
     * - `[format]`: The output format. (without `-min` suffix)
     * - `[min]`: It will replaced by `.min` when the format ends with `-min`, otherwise it's an empty string.
     *
     * The value can also be a function which returns the fileName template,
     * The placeholders are also available in the return value.
     *
     * @cli `--file-name <fileName>`
     */
    fileName?: string | GetFileName;
    /**
     * Module name for umd bundle
     */
    moduleName?: string;
    /**
     * Whether to minify output files regardless of format, using this option won't add `.min` suffix to the output file name.
     */
    minify?: boolean;
    /**
     * Extract CSS into a single file.
     * @default `true`
     */
    extractCSS?: boolean;
    /**
     * Generate source maps
     * @default `true` for minified bundle, `false` otherwise
     */
    sourceMap?: boolean;
    /**
     * Exclude source code in source maps
     */
    sourceMapExcludeSources?: boolean;
    /**
     * Output target
     * @default `node`
     * @cli `--target <target>`
     */
    target?: OutputTarget;
}
export interface Config {
    /**
     * Input files
     * @default `src/index.js`
     * @cli `bili [...input]`
     */
    input?: string | ConfigEntryObject | Array<ConfigEntryObject | string>;
    output?: ConfigOutput;
    /**
     * Define env variables that are only available in your library code. i.e. if you have some code like this in your library.
     *
     * ```js
     * if (process.env.NODE_ENV === 'development') {
     *   console.log('debug')
     * }
     * ```
     *
     * And you can run following command to replace the env variable:
  
     * ```bash
     * bili --env.NODE_ENV production
     * ```
     *
     * By default we don't add any env variables.
     *
     * @cli `--env.<name> value`
     */
    env?: Env;
    /**
     * Use Rollup plugins
     *
     * ```js
     * // bili.config.js
     * module.exports = {
     *   plugins: {
     *     svelte: {
     *      // Any options for rollup-plugin-svelte
     *     }
     *   }
     * }
     * ```
     *
     * You can also use CLI flags to add plugins, e.g.
     * ```bash
     * bili --plugin.svelte
     * # with option
     * bili --plugin.svelte.foo bar
     * # Same as using `svelte: { foo: 'bar' }` in config file
     * ```
     *
     * @cli `--plugin.<name> [option]`
     */
    plugins?: {
        [name: string]: any;
    };
    /**
     * Defines how to resolve a plugin by name
     * This will override the default behavior
     * e.g.
     * ```js
     * {
     *   resolvePlugins: {
     *     replace: require('./my-fork-of-rollup-plugin-replace')
     *   }
     * }
     * ```
     */
    resolvePlugins?: {
        [name: string]: any;
    };
    /**
     * Include node modules in the bundle. Note that this is always `true` for UMD bundle.
     * @cli `--bundle-node-modules`
     */
    bundleNodeModules?: boolean | string[];
    /**
     * When inlining node modules
     * You can use this option to exclude specific modules
     */
    externals?: Externals;
    /**
     * Specifies `moduleId: variableName` pairs necessary for external imports in umd/iife bundles. For example, in a case like this...
     *
     * ```js
     * import $ from 'jquery'
     * ```
     *
     * ...you can map the `jquery` module ID to the global `$` variable:
     *
     * ```js
     * // bili.config.js
     * export default {
     *   globals: {
     *     jquery: '$'
     *   }
     * }
     * ```
     *
     * @cli `--global.<moduleId> <variableName`
     */
    globals?: {
        [k: string]: string;
    };
    /**
     * Insert a copyright message to the top of output bundle.
     */
    banner?: Banner;
    /**
     * Configure the default babel preset
     */
    babel?: BabelPresetOptions;
    /**
     * Extending Bili config
     */
    extendConfig?: ExtendConfig;
    /**
     * Extending generated rollup config
     */
    extendRollupConfig?: ExtendRollupConfig;
}
interface ConfigOutputOverwrite {
    /**
     * Output directory, always a string
     */
    dir: string;
}
export interface NormalizedConfig {
    input?: string | ConfigEntryObject | Array<ConfigEntryObject | string>;
    output: Overwrite<ConfigOutput, ConfigOutputOverwrite>;
    env?: Env;
    bundleNodeModules?: boolean | string[];
    plugins: {
        [name: string]: any;
    };
    resolvePlugins?: {
        [name: string]: any;
    };
    externals: Externals;
    globals?: {
        [k: string]: string;
    };
    banner?: Banner;
    babel: BabelPresetOptions;
    extendConfig?: ExtendConfig;
    extendRollupConfig?: ExtendRollupConfig;
}
export interface Options {
    /**
     * Log level
     */
    logLevel?: 'verbose' | 'quiet';
    /**
     * Always show stack trace
     */
    stackTrace?: boolean;
    /**
     * Use a custom config file rather than auto-loading bili.config.js
     */
    configFile?: string | boolean;
    /**
     * The root directory to resolve files from
     * Useful for mono-repo
     * e.g. You can install Bili in root directory and leaf packages can use their own Bili config file:
     * - `bili --root-dir packages/foo`
     * - `bili --root-dir packages/bar`
     */
    rootDir?: string;
}
export {};