549 lines
19 KiB
TypeScript
549 lines
19 KiB
TypeScript
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/// <reference types="node" resolution-mode="require"/>
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/// <reference types="node" resolution-mode="require"/>
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/// <reference types="node" resolution-mode="require"/>
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/// <reference types="node" resolution-mode="require"/>
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import { EventEmitter } from 'events';
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import { StringDecoder } from 'string_decoder';
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/**
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* Same as StringDecoder, but exposing the `lastNeed` flag on the type
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*/
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type SD = StringDecoder & {
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lastNeed: boolean;
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};
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export type { SD, Pipe, PipeProxyErrors };
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/**
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* Return true if the argument is a Minipass stream, Node stream, or something
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* else that Minipass can interact with.
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*/
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export declare const isStream: (s: any) => s is NodeJS.WriteStream | NodeJS.ReadStream | Minipass<any, any, any> | (NodeJS.ReadStream & {
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fd: number;
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}) | (EventEmitter & {
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pause(): any;
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resume(): any;
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pipe(...destArgs: any[]): any;
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}) | (NodeJS.WriteStream & {
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fd: number;
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}) | (EventEmitter & {
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end(): any;
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write(chunk: any, ...args: any[]): any;
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});
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/**
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* Return true if the argument is a valid {@link Minipass.Readable}
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*/
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export declare const isReadable: (s: any) => s is Minipass.Readable;
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/**
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* Return true if the argument is a valid {@link Minipass.Writable}
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*/
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export declare const isWritable: (s: any) => s is Minipass.Readable;
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declare const EOF: unique symbol;
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declare const MAYBE_EMIT_END: unique symbol;
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declare const EMITTED_END: unique symbol;
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declare const EMITTING_END: unique symbol;
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declare const EMITTED_ERROR: unique symbol;
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declare const CLOSED: unique symbol;
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declare const READ: unique symbol;
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declare const FLUSH: unique symbol;
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declare const FLUSHCHUNK: unique symbol;
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declare const ENCODING: unique symbol;
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declare const DECODER: unique symbol;
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declare const FLOWING: unique symbol;
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declare const PAUSED: unique symbol;
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declare const RESUME: unique symbol;
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declare const BUFFER: unique symbol;
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declare const PIPES: unique symbol;
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declare const BUFFERLENGTH: unique symbol;
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declare const BUFFERPUSH: unique symbol;
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declare const BUFFERSHIFT: unique symbol;
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declare const OBJECTMODE: unique symbol;
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declare const DESTROYED: unique symbol;
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declare const ERROR: unique symbol;
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declare const EMITDATA: unique symbol;
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declare const EMITEND: unique symbol;
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declare const EMITEND2: unique symbol;
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declare const ASYNC: unique symbol;
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declare const ABORT: unique symbol;
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declare const ABORTED: unique symbol;
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declare const SIGNAL: unique symbol;
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declare const DATALISTENERS: unique symbol;
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declare const DISCARDED: unique symbol;
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/**
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* Options that may be passed to stream.pipe()
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*/
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export interface PipeOptions {
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/**
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* end the destination stream when the source stream ends
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*/
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end?: boolean;
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/**
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* proxy errors from the source stream to the destination stream
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*/
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proxyErrors?: boolean;
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}
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/**
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* Internal class representing a pipe to a destination stream.
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*
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* @internal
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*/
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declare class Pipe<T extends unknown> {
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src: Minipass<T>;
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dest: Minipass<any, T>;
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opts: PipeOptions;
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ondrain: () => any;
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constructor(src: Minipass<T>, dest: Minipass.Writable, opts: PipeOptions);
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unpipe(): void;
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proxyErrors(_er: any): void;
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end(): void;
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}
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/**
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* Internal class representing a pipe to a destination stream where
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* errors are proxied.
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*
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* @internal
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*/
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declare class PipeProxyErrors<T> extends Pipe<T> {
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unpipe(): void;
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constructor(src: Minipass<T>, dest: Minipass.Writable, opts: PipeOptions);
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}
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export declare namespace Minipass {
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/**
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* Encoding used to create a stream that outputs strings rather than
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* Buffer objects.
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*/
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export type Encoding = BufferEncoding | 'buffer' | null;
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/**
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* Any stream that Minipass can pipe into
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*/
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export type Writable = Minipass<any, any, any> | NodeJS.WriteStream | (NodeJS.WriteStream & {
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fd: number;
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}) | (EventEmitter & {
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end(): any;
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write(chunk: any, ...args: any[]): any;
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});
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/**
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* Any stream that can be read from
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*/
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export type Readable = Minipass<any, any, any> | NodeJS.ReadStream | (NodeJS.ReadStream & {
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fd: number;
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}) | (EventEmitter & {
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pause(): any;
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resume(): any;
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pipe(...destArgs: any[]): any;
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});
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/**
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* Utility type that can be iterated sync or async
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*/
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export type DualIterable<T> = Iterable<T> & AsyncIterable<T>;
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type EventArguments = Record<string | symbol, unknown[]>;
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/**
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* The listing of events that a Minipass class can emit.
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* Extend this when extending the Minipass class, and pass as
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* the third template argument. The key is the name of the event,
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* and the value is the argument list.
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*
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* Any undeclared events will still be allowed, but the handler will get
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* arguments as `unknown[]`.
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*/
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export interface Events<RType extends any = Buffer> extends EventArguments {
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readable: [];
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data: [chunk: RType];
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error: [er: unknown];
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abort: [reason: unknown];
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drain: [];
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resume: [];
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end: [];
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finish: [];
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prefinish: [];
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close: [];
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[DESTROYED]: [er?: unknown];
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[ERROR]: [er: unknown];
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}
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/**
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* String or buffer-like data that can be joined and sliced
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*/
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export type ContiguousData = Buffer | ArrayBufferLike | ArrayBufferView | string;
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export type BufferOrString = Buffer | string;
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/**
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* Options passed to the Minipass constructor.
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*/
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export type SharedOptions = {
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/**
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* Defer all data emission and other events until the end of the
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* current tick, similar to Node core streams
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*/
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async?: boolean;
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/**
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* A signal which will abort the stream
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*/
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signal?: AbortSignal;
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/**
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* Output string encoding. Set to `null` or `'buffer'` (or omit) to
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* emit Buffer objects rather than strings.
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*
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* Conflicts with `objectMode`
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*/
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encoding?: BufferEncoding | null | 'buffer';
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/**
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* Output data exactly as it was written, supporting non-buffer/string
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* data (such as arbitrary objects, falsey values, etc.)
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*
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* Conflicts with `encoding`
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*/
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objectMode?: boolean;
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};
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/**
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* Options for a string encoded output
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*/
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export type EncodingOptions = SharedOptions & {
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encoding: BufferEncoding;
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objectMode?: false;
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};
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/**
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* Options for contiguous data buffer output
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*/
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export type BufferOptions = SharedOptions & {
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encoding?: null | 'buffer';
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objectMode?: false;
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};
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/**
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* Options for objectMode arbitrary output
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*/
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export type ObjectModeOptions = SharedOptions & {
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objectMode: true;
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encoding?: null;
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};
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/**
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* Utility type to determine allowed options based on read type
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*/
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export type Options<T> = T extends string ? EncodingOptions | ObjectModeOptions : T extends Buffer ? BufferOptions | ObjectModeOptions : SharedOptions;
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export {};
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}
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/**
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* Main export, the Minipass class
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*
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* `RType` is the type of data emitted, defaults to Buffer
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*
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* `WType` is the type of data to be written, if RType is buffer or string,
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* then any {@link Minipass.ContiguousData} is allowed.
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*
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* `Events` is the set of event handler signatures that this object
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* will emit, see {@link Minipass.Events}
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*/
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export declare class Minipass<RType extends unknown = Buffer, WType extends unknown = RType extends Minipass.BufferOrString ? Minipass.ContiguousData : RType, Events extends Minipass.Events<RType> = Minipass.Events<RType>> extends EventEmitter implements Minipass.DualIterable<RType> {
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[FLOWING]: boolean;
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[PAUSED]: boolean;
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[PIPES]: Pipe<RType>[];
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[BUFFER]: RType[];
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[OBJECTMODE]: boolean;
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[ENCODING]: BufferEncoding | null;
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[ASYNC]: boolean;
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[DECODER]: SD | null;
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[EOF]: boolean;
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[EMITTED_END]: boolean;
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[EMITTING_END]: boolean;
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[CLOSED]: boolean;
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[EMITTED_ERROR]: unknown;
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[BUFFERLENGTH]: number;
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[DESTROYED]: boolean;
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[SIGNAL]?: AbortSignal;
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[ABORTED]: boolean;
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[DATALISTENERS]: number;
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[DISCARDED]: boolean;
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/**
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* true if the stream can be written
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*/
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writable: boolean;
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/**
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* true if the stream can be read
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*/
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readable: boolean;
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/**
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* If `RType` is Buffer, then options do not need to be provided.
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* Otherwise, an options object must be provided to specify either
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* {@link Minipass.SharedOptions.objectMode} or
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* {@link Minipass.SharedOptions.encoding}, as appropriate.
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*/
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constructor(...args: RType extends Buffer ? [] | [Minipass.Options<RType>] : [Minipass.Options<RType>]);
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/**
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* The amount of data stored in the buffer waiting to be read.
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*
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* For Buffer strings, this will be the total byte length.
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* For string encoding streams, this will be the string character length,
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* according to JavaScript's `string.length` logic.
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* For objectMode streams, this is a count of the items waiting to be
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* emitted.
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*/
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get bufferLength(): number;
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/**
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* The `BufferEncoding` currently in use, or `null`
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*/
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get encoding(): BufferEncoding | null;
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/**
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* @deprecated - This is a read only property
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*/
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set encoding(_enc: BufferEncoding | null);
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/**
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* @deprecated - Encoding may only be set at instantiation time
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*/
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setEncoding(_enc: Minipass.Encoding): void;
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/**
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* True if this is an objectMode stream
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*/
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get objectMode(): boolean;
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/**
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* @deprecated - This is a read-only property
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*/
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set objectMode(_om: boolean);
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/**
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* true if this is an async stream
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*/
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get ['async'](): boolean;
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/**
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* Set to true to make this stream async.
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*
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* Once set, it cannot be unset, as this would potentially cause incorrect
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* behavior. Ie, a sync stream can be made async, but an async stream
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* cannot be safely made sync.
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*/
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set ['async'](a: boolean);
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[ABORT](): void;
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/**
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* True if the stream has been aborted.
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*/
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get aborted(): boolean;
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/**
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* No-op setter. Stream aborted status is set via the AbortSignal provided
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* in the constructor options.
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*/
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set aborted(_: boolean);
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/**
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* Write data into the stream
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*
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* If the chunk written is a string, and encoding is not specified, then
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* `utf8` will be assumed. If the stream encoding matches the encoding of
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* a written string, and the state of the string decoder allows it, then
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* the string will be passed through to either the output or the internal
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* buffer without any processing. Otherwise, it will be turned into a
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* Buffer object for processing into the desired encoding.
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*
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* If provided, `cb` function is called immediately before return for
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* sync streams, or on next tick for async streams, because for this
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* base class, a chunk is considered "processed" once it is accepted
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* and either emitted or buffered. That is, the callback does not indicate
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* that the chunk has been eventually emitted, though of course child
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* classes can override this function to do whatever processing is required
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* and call `super.write(...)` only once processing is completed.
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*/
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write(chunk: WType, cb?: () => void): boolean;
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write(chunk: WType, encoding?: Minipass.Encoding, cb?: () => void): boolean;
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/**
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* Low-level explicit read method.
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*
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* In objectMode, the argument is ignored, and one item is returned if
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* available.
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*
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* `n` is the number of bytes (or in the case of encoding streams,
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* characters) to consume. If `n` is not provided, then the entire buffer
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* is returned, or `null` is returned if no data is available.
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*
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* If `n` is greater that the amount of data in the internal buffer,
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* then `null` is returned.
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*/
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read(n?: number | null): RType | null;
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[READ](n: number | null, chunk: RType): RType;
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/**
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* End the stream, optionally providing a final write.
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*
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* See {@link Minipass#write} for argument descriptions
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*/
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end(cb?: () => void): this;
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end(chunk: WType, cb?: () => void): this;
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end(chunk: WType, encoding?: Minipass.Encoding, cb?: () => void): this;
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[RESUME](): void;
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/**
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* Resume the stream if it is currently in a paused state
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*
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* If called when there are no pipe destinations or `data` event listeners,
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* this will place the stream in a "discarded" state, where all data will
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* be thrown away. The discarded state is removed if a pipe destination or
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* data handler is added, if pause() is called, or if any synchronous or
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* asynchronous iteration is started.
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*/
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resume(): void;
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/**
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* Pause the stream
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||
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|
*/
|
||
|
|
pause(): void;
|
||
|
|
/**
|
||
|
|
* true if the stream has been forcibly destroyed
|
||
|
|
*/
|
||
|
|
get destroyed(): boolean;
|
||
|
|
/**
|
||
|
|
* true if the stream is currently in a flowing state, meaning that
|
||
|
|
* any writes will be immediately emitted.
|
||
|
|
*/
|
||
|
|
get flowing(): boolean;
|
||
|
|
/**
|
||
|
|
* true if the stream is currently in a paused state
|
||
|
|
*/
|
||
|
|
get paused(): boolean;
|
||
|
|
[BUFFERPUSH](chunk: RType): void;
|
||
|
|
[BUFFERSHIFT](): RType;
|
||
|
|
[FLUSH](noDrain?: boolean): void;
|
||
|
|
[FLUSHCHUNK](chunk: RType): boolean;
|
||
|
|
/**
|
||
|
|
* Pipe all data emitted by this stream into the destination provided.
|
||
|
|
*
|
||
|
|
* Triggers the flow of data.
|
||
|
|
*/
|
||
|
|
pipe<W extends Minipass.Writable>(dest: W, opts?: PipeOptions): W;
|
||
|
|
/**
|
||
|
|
* Fully unhook a piped destination stream.
|
||
|
|
*
|
||
|
|
* If the destination stream was the only consumer of this stream (ie,
|
||
|
|
* there are no other piped destinations or `'data'` event listeners)
|
||
|
|
* then the flow of data will stop until there is another consumer or
|
||
|
|
* {@link Minipass#resume} is explicitly called.
|
||
|
|
*/
|
||
|
|
unpipe<W extends Minipass.Writable>(dest: W): void;
|
||
|
|
/**
|
||
|
|
* Alias for {@link Minipass#on}
|
||
|
|
*/
|
||
|
|
addListener<Event extends keyof Events>(ev: Event, handler: (...args: Events[Event]) => any): this;
|
||
|
|
/**
|
||
|
|
* Mostly identical to `EventEmitter.on`, with the following
|
||
|
|
* behavior differences to prevent data loss and unnecessary hangs:
|
||
|
|
*
|
||
|
|
* - Adding a 'data' event handler will trigger the flow of data
|
||
|
|
*
|
||
|
|
* - Adding a 'readable' event handler when there is data waiting to be read
|
||
|
|
* will cause 'readable' to be emitted immediately.
|
||
|
|
*
|
||
|
|
* - Adding an 'endish' event handler ('end', 'finish', etc.) which has
|
||
|
|
* already passed will cause the event to be emitted immediately and all
|
||
|
|
* handlers removed.
|
||
|
|
*
|
||
|
|
* - Adding an 'error' event handler after an error has been emitted will
|
||
|
|
* cause the event to be re-emitted immediately with the error previously
|
||
|
|
* raised.
|
||
|
|
*/
|
||
|
|
on<Event extends keyof Events>(ev: Event, handler: (...args: Events[Event]) => any): this;
|
||
|
|
/**
|
||
|
|
* Alias for {@link Minipass#off}
|
||
|
|
*/
|
||
|
|
removeListener<Event extends keyof Events>(ev: Event, handler: (...args: Events[Event]) => any): this;
|
||
|
|
/**
|
||
|
|
* Mostly identical to `EventEmitter.off`
|
||
|
|
*
|
||
|
|
* If a 'data' event handler is removed, and it was the last consumer
|
||
|
|
* (ie, there are no pipe destinations or other 'data' event listeners),
|
||
|
|
* then the flow of data will stop until there is another consumer or
|
||
|
|
* {@link Minipass#resume} is explicitly called.
|
||
|
|
*/
|
||
|
|
off<Event extends keyof Events>(ev: Event, handler: (...args: Events[Event]) => any): this;
|
||
|
|
/**
|
||
|
|
* Mostly identical to `EventEmitter.removeAllListeners`
|
||
|
|
*
|
||
|
|
* If all 'data' event handlers are removed, and they were the last consumer
|
||
|
|
* (ie, there are no pipe destinations), then the flow of data will stop
|
||
|
|
* until there is another consumer or {@link Minipass#resume} is explicitly
|
||
|
|
* called.
|
||
|
|
*/
|
||
|
|
removeAllListeners<Event extends keyof Events>(ev?: Event): this;
|
||
|
|
/**
|
||
|
|
* true if the 'end' event has been emitted
|
||
|
|
*/
|
||
|
|
get emittedEnd(): boolean;
|
||
|
|
[MAYBE_EMIT_END](): void;
|
||
|
|
/**
|
||
|
|
* Mostly identical to `EventEmitter.emit`, with the following
|
||
|
|
* behavior differences to prevent data loss and unnecessary hangs:
|
||
|
|
*
|
||
|
|
* If the stream has been destroyed, and the event is something other
|
||
|
|
* than 'close' or 'error', then `false` is returned and no handlers
|
||
|
|
* are called.
|
||
|
|
*
|
||
|
|
* If the event is 'end', and has already been emitted, then the event
|
||
|
|
* is ignored. If the stream is in a paused or non-flowing state, then
|
||
|
|
* the event will be deferred until data flow resumes. If the stream is
|
||
|
|
* async, then handlers will be called on the next tick rather than
|
||
|
|
* immediately.
|
||
|
|
*
|
||
|
|
* If the event is 'close', and 'end' has not yet been emitted, then
|
||
|
|
* the event will be deferred until after 'end' is emitted.
|
||
|
|
*
|
||
|
|
* If the event is 'error', and an AbortSignal was provided for the stream,
|
||
|
|
* and there are no listeners, then the event is ignored, matching the
|
||
|
|
* behavior of node core streams in the presense of an AbortSignal.
|
||
|
|
*
|
||
|
|
* If the event is 'finish' or 'prefinish', then all listeners will be
|
||
|
|
* removed after emitting the event, to prevent double-firing.
|
||
|
|
*/
|
||
|
|
emit<Event extends keyof Events>(ev: Event, ...args: Events[Event]): boolean;
|
||
|
|
[EMITDATA](data: RType): boolean;
|
||
|
|
[EMITEND](): boolean;
|
||
|
|
[EMITEND2](): boolean;
|
||
|
|
/**
|
||
|
|
* Return a Promise that resolves to an array of all emitted data once
|
||
|
|
* the stream ends.
|
||
|
|
*/
|
||
|
|
collect(): Promise<RType[] & {
|
||
|
|
dataLength: number;
|
||
|
|
}>;
|
||
|
|
/**
|
||
|
|
* Return a Promise that resolves to the concatenation of all emitted data
|
||
|
|
* once the stream ends.
|
||
|
|
*
|
||
|
|
* Not allowed on objectMode streams.
|
||
|
|
*/
|
||
|
|
concat(): Promise<RType>;
|
||
|
|
/**
|
||
|
|
* Return a void Promise that resolves once the stream ends.
|
||
|
|
*/
|
||
|
|
promise(): Promise<void>;
|
||
|
|
/**
|
||
|
|
* Asynchronous `for await of` iteration.
|
||
|
|
*
|
||
|
|
* This will continue emitting all chunks until the stream terminates.
|
||
|
|
*/
|
||
|
|
[Symbol.asyncIterator](): AsyncGenerator<RType, void, void>;
|
||
|
|
/**
|
||
|
|
* Synchronous `for of` iteration.
|
||
|
|
*
|
||
|
|
* The iteration will terminate when the internal buffer runs out, even
|
||
|
|
* if the stream has not yet terminated.
|
||
|
|
*/
|
||
|
|
[Symbol.iterator](): Generator<RType, void, void>;
|
||
|
|
/**
|
||
|
|
* Destroy a stream, preventing it from being used for any further purpose.
|
||
|
|
*
|
||
|
|
* If the stream has a `close()` method, then it will be called on
|
||
|
|
* destruction.
|
||
|
|
*
|
||
|
|
* After destruction, any attempt to write data, read data, or emit most
|
||
|
|
* events will be ignored.
|
||
|
|
*
|
||
|
|
* If an error argument is provided, then it will be emitted in an
|
||
|
|
* 'error' event.
|
||
|
|
*/
|
||
|
|
destroy(er?: unknown): this;
|
||
|
|
/**
|
||
|
|
* Alias for {@link isStream}
|
||
|
|
*
|
||
|
|
* Former export location, maintained for backwards compatibility.
|
||
|
|
*
|
||
|
|
* @deprecated
|
||
|
|
*/
|
||
|
|
static get isStream(): (s: any) => s is NodeJS.WriteStream | NodeJS.ReadStream | Minipass<any, any, any> | (NodeJS.ReadStream & {
|
||
|
|
fd: number;
|
||
|
|
}) | (EventEmitter & {
|
||
|
|
pause(): any;
|
||
|
|
resume(): any;
|
||
|
|
pipe(...destArgs: any[]): any;
|
||
|
|
}) | (NodeJS.WriteStream & {
|
||
|
|
fd: number;
|
||
|
|
}) | (EventEmitter & {
|
||
|
|
end(): any;
|
||
|
|
write(chunk: any, ...args: any[]): any;
|
||
|
|
});
|
||
|
|
}
|
||
|
|
//# sourceMappingURL=index.d.ts.map
|