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64 KiB
Text
Executable file
1 line
No EOL
64 KiB
Text
Executable file
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'finish' | 'prefinish'\nconst isEndish = (ev: any): ev is EndishEvent =>\n ev === 'end' || ev === 'finish' || ev === 'prefinish'\n\nconst isArrayBufferLike = (b: any): b is ArrayBufferLike =>\n b instanceof ArrayBuffer ||\n (!!b &&\n typeof b === 'object' &&\n b.constructor &&\n b.constructor.name === 'ArrayBuffer' &&\n b.byteLength >= 0)\n\nconst isArrayBufferView = (b: any): b is ArrayBufferView =>\n !Buffer.isBuffer(b) && ArrayBuffer.isView(b)\n\n/**\n * Options that may be passed to stream.pipe()\n */\nexport interface PipeOptions {\n /**\n * end the destination stream when the source stream ends\n */\n end?: boolean\n /**\n * proxy errors from the source stream to the destination stream\n */\n proxyErrors?: boolean\n}\n\n/**\n * Internal class representing a pipe to a destination stream.\n *\n * @internal\n */\nclass Pipe<T extends unknown> {\n src: Minipass<T>\n dest: Minipass<any, T>\n opts: PipeOptions\n ondrain: () => any\n constructor(\n src: Minipass<T>,\n dest: 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Minipass.ContiguousData\n : RType,\n Events extends Minipass.Events<RType> = Minipass.Events<RType>\n >\n extends EventEmitter\n implements Minipass.DualIterable<RType>\n{\n [FLOWING]: boolean = false;\n [PAUSED]: boolean = false;\n [PIPES]: Pipe<RType>[] = [];\n [BUFFER]: RType[] = [];\n [OBJECTMODE]: boolean;\n [ENCODING]: BufferEncoding | null;\n [ASYNC]: boolean;\n [DECODER]: SD | null;\n [EOF]: boolean = false;\n [EMITTED_END]: boolean = false;\n [EMITTING_END]: boolean = false;\n [CLOSED]: boolean = false;\n [EMITTED_ERROR]: unknown = null;\n [BUFFERLENGTH]: number = 0;\n [DESTROYED]: boolean = false;\n [SIGNAL]?: AbortSignal;\n [ABORTED]: boolean = false;\n [DATALISTENERS]: number = 0;\n [DISCARDED]: boolean = false\n\n /**\n * true if the stream can be written\n */\n writable: boolean = true\n /**\n * true if the stream can be read\n */\n readable: boolean = true\n\n /**\n * If `RType` is Buffer, then options do not need to be provided.\n * Otherwise, an options object must be provided to specify either\n * {@link Minipass.SharedOptions.objectMode} or\n * {@link Minipass.SharedOptions.encoding}, as appropriate.\n */\n constructor(\n ...args: RType extends Buffer\n ? [] | [Minipass.Options<RType>]\n : [Minipass.Options<RType>]\n ) {\n const options: Minipass.Options<RType> = (args[0] ||\n {}) as Minipass.Options<RType>\n super()\n if (options.objectMode && typeof options.encoding === 'string') {\n throw new TypeError(\n 'Encoding and objectMode may not be used together'\n )\n }\n if (isObjectModeOptions(options)) {\n this[OBJECTMODE] = true\n this[ENCODING] = null\n } else if (isEncodingOptions(options)) {\n this[ENCODING] = options.encoding\n this[OBJECTMODE] = false\n } else {\n this[OBJECTMODE] = false\n this[ENCODING] = null\n }\n this[ASYNC] = !!options.async\n this[DECODER] = this[ENCODING]\n ? (new StringDecoder(this[ENCODING]) as SD)\n : null\n\n //@ts-ignore - private option for debugging and testing\n if (options && options.debugExposeBuffer === true) {\n Object.defineProperty(this, 'buffer', { get: () => this[BUFFER] })\n }\n //@ts-ignore - private option for debugging and testing\n if (options && options.debugExposePipes === true) {\n Object.defineProperty(this, 'pipes', { get: () => this[PIPES] })\n }\n\n const { signal } = options\n if (signal) {\n this[SIGNAL] = signal\n if (signal.aborted) {\n this[ABORT]()\n } else {\n signal.addEventListener('abort', () => this[ABORT]())\n }\n }\n }\n\n /**\n * The amount of data stored in the buffer waiting to be read.\n *\n * For Buffer strings, this will be the total byte length.\n * For string encoding streams, this will be the string character length,\n * according to JavaScript's `string.length` logic.\n * For objectMode streams, this is a count of the items waiting to be\n * emitted.\n */\n get bufferLength() {\n return this[BUFFERLENGTH]\n }\n\n /**\n * The `BufferEncoding` currently in use, or `null`\n */\n get encoding() {\n return this[ENCODING]\n }\n\n /**\n * @deprecated - This is a read only property\n */\n set encoding(_enc) {\n throw new Error('Encoding must be set at instantiation time')\n }\n\n /**\n * @deprecated - Encoding may only be set at instantiation time\n */\n setEncoding(_enc: Minipass.Encoding) {\n throw new Error('Encoding must be set at instantiation time')\n }\n\n /**\n * True if this is an objectMode stream\n */\n get objectMode() {\n return this[OBJECTMODE]\n }\n\n /**\n * @deprecated - This is a read-only property\n */\n set objectMode(_om) {\n throw new Error('objectMode must be set at instantiation time')\n }\n\n /**\n * true if this is an async stream\n */\n get ['async'](): boolean {\n return this[ASYNC]\n }\n /**\n * Set to true to make this stream async.\n *\n * Once set, it cannot be unset, as this would potentially cause incorrect\n * behavior. Ie, a sync stream can be made async, but an async stream\n * cannot be safely made sync.\n */\n set ['async'](a: boolean) {\n this[ASYNC] = this[ASYNC] || !!a\n }\n\n // drop everything and get out of the flow completely\n [ABORT]() {\n this[ABORTED] = true\n this.emit('abort', this[SIGNAL]?.reason)\n this.destroy(this[SIGNAL]?.reason)\n }\n\n /**\n * True if the stream has been aborted.\n */\n get aborted() {\n return this[ABORTED]\n }\n /**\n * No-op setter. Stream aborted status is set via the AbortSignal provided\n * in the constructor options.\n */\n set aborted(_) {}\n\n /**\n * Write data into the stream\n *\n * If the chunk written is a string, and encoding is not specified, then\n * `utf8` will be assumed. If the stream encoding matches the encoding of\n * a written string, and the state of the string decoder allows it, then\n * the string will be passed through to either the output or the internal\n * buffer without any processing. Otherwise, it will be turned into a\n * Buffer object for processing into the desired encoding.\n *\n * If provided, `cb` function is called immediately before return for\n * sync streams, or on next tick for async streams, because for this\n * base class, a chunk is considered \"processed\" once it is accepted\n * and either emitted or buffered. That is, the callback does not indicate\n * that the chunk has been eventually emitted, though of course child\n * classes can override this function to do whatever processing is required\n * and call `super.write(...)` only once processing is completed.\n */\n write(chunk: WType, cb?: () => void): boolean\n write(\n chunk: WType,\n encoding?: Minipass.Encoding,\n cb?: () => void\n ): boolean\n write(\n chunk: WType,\n encoding?: Minipass.Encoding | (() => void),\n cb?: () => void\n ): boolean {\n if (this[ABORTED]) return false\n if (this[EOF]) throw new Error('write after end')\n\n if (this[DESTROYED]) {\n this.emit(\n 'error',\n Object.assign(\n new Error('Cannot call write after a stream was destroyed'),\n { code: 'ERR_STREAM_DESTROYED' }\n )\n )\n return true\n }\n\n if (typeof encoding === 'function') {\n cb = encoding\n encoding = 'utf8'\n }\n\n if (!encoding) encoding = 'utf8'\n\n const fn = this[ASYNC] ? defer : nodefer\n\n // convert array buffers and typed array views into buffers\n // at some point in the future, we may want to do the opposite!\n // leave strings and buffers as-is\n // anything is only allowed if in object mode, so throw\n if (!this[OBJECTMODE] && !Buffer.isBuffer(chunk)) {\n if (isArrayBufferView(chunk)) {\n //@ts-ignore - sinful unsafe type changing\n chunk = Buffer.from(\n chunk.buffer,\n chunk.byteOffset,\n chunk.byteLength\n )\n } else if (isArrayBufferLike(chunk)) {\n //@ts-ignore - sinful unsafe type changing\n chunk = Buffer.from(chunk)\n } else if (typeof chunk !== 'string') {\n throw new Error(\n 'Non-contiguous data written to non-objectMode stream'\n )\n }\n }\n\n // handle object mode up front, since it's simpler\n // this yields better performance, fewer checks later.\n if (this[OBJECTMODE]) {\n // maybe impossible?\n /* c8 ignore start */\n if (this[FLOWING] && this[BUFFERLENGTH] !== 0) this[FLUSH](true)\n /* c8 ignore stop */\n\n if (this[FLOWING]) this.emit('data', chunk as unknown as RType)\n else this[BUFFERPUSH](chunk as unknown as RType)\n\n if (this[BUFFERLENGTH] !== 0) this.emit('readable')\n\n if (cb) fn(cb)\n\n return this[FLOWING]\n }\n\n // at this point the chunk is a buffer or string\n // don't buffer it up or send it to the decoder\n if (!(chunk as Minipass.BufferOrString).length) {\n if (this[BUFFERLENGTH] !== 0) this.emit('readable')\n if (cb) fn(cb)\n return this[FLOWING]\n }\n\n // fast-path writing strings of same encoding to a stream with\n // an empty buffer, skipping the buffer/decoder dance\n if (\n typeof chunk === 'string' &&\n // unless it is a string already ready for us to use\n !(encoding === this[ENCODING] && !this[DECODER]?.lastNeed)\n ) {\n //@ts-ignore - sinful unsafe type change\n chunk = Buffer.from(chunk, encoding)\n }\n\n if (Buffer.isBuffer(chunk) && this[ENCODING]) {\n //@ts-ignore - sinful unsafe type change\n chunk = this[DECODER].write(chunk)\n }\n\n // Note: flushing CAN potentially switch us into not-flowing mode\n if (this[FLOWING] && this[BUFFERLENGTH] !== 0) this[FLUSH](true)\n\n if (this[FLOWING]) this.emit('data', chunk as unknown as RType)\n else this[BUFFERPUSH](chunk as unknown as RType)\n\n if (this[BUFFERLENGTH] !== 0) this.emit('readable')\n\n if (cb) fn(cb)\n\n return this[FLOWING]\n }\n\n /**\n * Low-level explicit read method.\n *\n * In objectMode, the argument is ignored, and one item is returned if\n * available.\n *\n * `n` is the number of bytes (or in the case of encoding streams,\n * characters) to consume. If `n` is not provided, then the entire buffer\n * is returned, or `null` is returned if no data is available.\n *\n * If `n` is greater that the amount of data in the internal buffer,\n * then `null` is returned.\n */\n read(n?: number | null): RType | null {\n if (this[DESTROYED]) return null\n this[DISCARDED] = false\n\n if (\n this[BUFFERLENGTH] === 0 ||\n n === 0 ||\n (n && n > this[BUFFERLENGTH])\n ) {\n this[MAYBE_EMIT_END]()\n return null\n }\n\n if (this[OBJECTMODE]) n = null\n\n if (this[BUFFER].length > 1 && !this[OBJECTMODE]) {\n // not object mode, so if we have an encoding, then RType is string\n // otherwise, must be Buffer\n this[BUFFER] = [\n (this[ENCODING]\n ? this[BUFFER].join('')\n : Buffer.concat(\n this[BUFFER] as Buffer[],\n this[BUFFERLENGTH]\n )) as RType,\n ]\n }\n\n const ret = this[READ](n || null, this[BUFFER][0] as RType)\n this[MAYBE_EMIT_END]()\n return ret\n }\n\n [READ](n: number | null, chunk: RType) {\n if (this[OBJECTMODE]) this[BUFFERSHIFT]()\n else {\n const c = chunk as Minipass.BufferOrString\n if (n === c.length || n === null) this[BUFFERSHIFT]()\n else if (typeof c === 'string') {\n this[BUFFER][0] = c.slice(n) as RType\n chunk = c.slice(0, n) as RType\n this[BUFFERLENGTH] -= n\n } else {\n this[BUFFER][0] = c.subarray(n) as RType\n chunk = c.subarray(0, n) as RType\n this[BUFFERLENGTH] -= n\n }\n }\n\n this.emit('data', chunk)\n\n if (!this[BUFFER].length && !this[EOF]) this.emit('drain')\n\n return chunk\n }\n\n /**\n * End the stream, optionally providing a final write.\n *\n * See {@link Minipass#write} for argument descriptions\n */\n end(cb?: () => void): this\n end(chunk: WType, cb?: () => void): this\n end(chunk: WType, encoding?: Minipass.Encoding, cb?: () => void): this\n end(\n chunk?: WType | (() => void),\n encoding?: Minipass.Encoding | (() => void),\n cb?: () => void\n ) {\n if (typeof chunk === 'function') {\n cb = chunk as () => void\n chunk = undefined\n }\n if (typeof encoding === 'function') {\n cb = encoding\n encoding = 'utf8'\n }\n if (chunk !== undefined) this.write(chunk, encoding)\n if (cb) this.once('end', cb)\n this[EOF] = true\n this.writable = false\n\n // if we haven't written anything, then go ahead and emit,\n // even if we're not reading.\n // we'll re-emit if a new 'end' listener is added anyway.\n // This makes MP more suitable to write-only use cases.\n if (this[FLOWING] || !this[PAUSED]) this[MAYBE_EMIT_END]()\n return this\n }\n\n // don't let the internal resume be overwritten\n [RESUME]() {\n if (this[DESTROYED]) return\n\n if (!this[DATALISTENERS] && !this[PIPES].length) {\n this[DISCARDED] = true\n }\n this[PAUSED] = false\n this[FLOWING] = true\n this.emit('resume')\n if (this[BUFFER].length) this[FLUSH]()\n else if (this[EOF]) this[MAYBE_EMIT_END]()\n else this.emit('drain')\n }\n\n /**\n * Resume the stream if it is currently in a paused state\n *\n * If called when there are no pipe destinations or `data` event listeners,\n * this will place the stream in a \"discarded\" state, where all data will\n * be thrown away. The discarded state is removed if a pipe destination or\n * data handler is added, if pause() is called, or if any synchronous or\n * asynchronous iteration is started.\n */\n resume() {\n return this[RESUME]()\n }\n\n /**\n * Pause the stream\n */\n pause() {\n this[FLOWING] = false\n this[PAUSED] = true\n this[DISCARDED] = false\n }\n\n /**\n * true if the stream has been forcibly destroyed\n */\n get destroyed() {\n return this[DESTROYED]\n }\n\n /**\n * true if the stream is currently in a flowing state, meaning that\n * any writes will be immediately emitted.\n */\n get flowing() {\n return this[FLOWING]\n }\n\n /**\n * true if the stream is currently in a paused state\n */\n get paused() {\n return this[PAUSED]\n }\n\n [BUFFERPUSH](chunk: RType) {\n if (this[OBJECTMODE]) this[BUFFERLENGTH] += 1\n else this[BUFFERLENGTH] += (chunk as Minipass.BufferOrString).length\n this[BUFFER].push(chunk)\n }\n\n [BUFFERSHIFT](): RType {\n if (this[OBJECTMODE]) this[BUFFERLENGTH] -= 1\n else\n this[BUFFERLENGTH] -= (\n this[BUFFER][0] as Minipass.BufferOrString\n ).length\n return this[BUFFER].shift() as RType\n }\n\n [FLUSH](noDrain: boolean = false) {\n do {} while (\n this[FLUSHCHUNK](this[BUFFERSHIFT]()) &&\n this[BUFFER].length\n )\n\n if (!noDrain && !this[BUFFER].length && !this[EOF]) this.emit('drain')\n }\n\n [FLUSHCHUNK](chunk: RType) {\n this.emit('data', chunk)\n return this[FLOWING]\n }\n\n /**\n * Pipe all data emitted by this stream into the destination provided.\n *\n * Triggers the flow of data.\n */\n pipe<W extends Minipass.Writable>(dest: W, opts?: PipeOptions): W {\n if (this[DESTROYED]) return dest\n this[DISCARDED] = false\n\n const ended = this[EMITTED_END]\n opts = opts || {}\n if (dest === proc.stdout || dest === proc.stderr) opts.end = false\n else opts.end = opts.end !== false\n opts.proxyErrors = !!opts.proxyErrors\n\n // piping an ended stream ends immediately\n if (ended) {\n if (opts.end) dest.end()\n } else {\n // \"as\" here just ignores the WType, which pipes don't care about,\n // since they're only consuming from us, and writing to the dest\n this[PIPES].push(\n !opts.proxyErrors\n ? new Pipe<RType>(this as Minipass<RType>, dest, opts)\n : new PipeProxyErrors<RType>(this as Minipass<RType>, dest, opts)\n )\n if (this[ASYNC]) defer(() => this[RESUME]())\n else this[RESUME]()\n }\n\n return dest\n }\n\n /**\n * Fully unhook a piped destination stream.\n *\n * If the destination stream was the only consumer of this stream (ie,\n * there are no other piped destinations or `'data'` event listeners)\n * then the flow of data will stop until there is another consumer or\n * {@link Minipass#resume} is explicitly called.\n */\n unpipe<W extends Minipass.Writable>(dest: W) {\n const p = this[PIPES].find(p => p.dest === dest)\n if (p) {\n if (this[PIPES].length === 1) {\n if (this[FLOWING] && this[DATALISTENERS] === 0) {\n this[FLOWING] = false\n }\n this[PIPES] = []\n } else this[PIPES].splice(this[PIPES].indexOf(p), 1)\n p.unpipe()\n }\n }\n\n /**\n * Alias for {@link Minipass#on}\n */\n addListener<Event extends keyof Events>(\n ev: Event,\n handler: (...args: Events[Event]) => any\n ): this {\n return this.on(ev, handler)\n }\n\n /**\n * Mostly identical to `EventEmitter.on`, with the following\n * behavior differences to prevent data loss and unnecessary hangs:\n *\n * - Adding a 'data' event handler will trigger the flow of data\n *\n * - Adding a 'readable' event handler when there is data waiting to be read\n * will cause 'readable' to be emitted immediately.\n *\n * - Adding an 'endish' event handler ('end', 'finish', etc.) which has\n * already passed will cause the event to be emitted immediately and all\n * handlers removed.\n *\n * - Adding an 'error' event handler after an error has been emitted will\n * cause the event to be re-emitted immediately with the error previously\n * raised.\n */\n on<Event extends keyof Events>(\n ev: Event,\n handler: (...args: Events[Event]) => any\n ): this {\n const ret = super.on(\n ev as string | symbol,\n handler as (...a: any[]) => any\n )\n if (ev === 'data') {\n this[DISCARDED] = false\n this[DATALISTENERS]++\n if (!this[PIPES].length && !this[FLOWING]) {\n this[RESUME]()\n }\n } else if (ev === 'readable' && this[BUFFERLENGTH] !== 0) {\n super.emit('readable')\n } else if (isEndish(ev) && this[EMITTED_END]) {\n super.emit(ev)\n this.removeAllListeners(ev)\n } else if (ev === 'error' && this[EMITTED_ERROR]) {\n const h = handler as (...a: Events['error']) => any\n if (this[ASYNC]) defer(() => h.call(this, this[EMITTED_ERROR]))\n else h.call(this, this[EMITTED_ERROR])\n }\n return ret\n }\n\n /**\n * Alias for {@link Minipass#off}\n */\n removeListener<Event extends keyof Events>(\n ev: Event,\n handler: (...args: Events[Event]) => any\n ) {\n return this.off(ev, handler)\n }\n\n /**\n * Mostly identical to `EventEmitter.off`\n *\n * If a 'data' event handler is removed, and it was the last consumer\n * (ie, there are no pipe destinations or other 'data' event listeners),\n * then the flow of data will stop until there is another consumer or\n * {@link Minipass#resume} is explicitly called.\n */\n off<Event extends keyof Events>(\n ev: Event,\n handler: (...args: Events[Event]) => any\n ) {\n const ret = super.off(\n ev as string | symbol,\n handler as (...a: any[]) => any\n )\n // if we previously had listeners, and now we don't, and we don't\n // have any pipes, then stop the flow, unless it's been explicitly\n // put in a discarded flowing state via stream.resume().\n if (ev === 'data') {\n this[DATALISTENERS] = this.listeners('data').length\n if (\n this[DATALISTENERS] === 0 &&\n !this[DISCARDED] &&\n !this[PIPES].length\n ) {\n this[FLOWING] = false\n }\n }\n return ret\n }\n\n /**\n * Mostly identical to `EventEmitter.removeAllListeners`\n *\n * If all 'data' event handlers are removed, and they were the last consumer\n * (ie, there are no pipe destinations), then the flow of data will stop\n * until there is another consumer or {@link Minipass#resume} is explicitly\n * called.\n */\n removeAllListeners<Event extends keyof Events>(ev?: Event) {\n const ret = super.removeAllListeners(ev as string | symbol | undefined)\n if (ev === 'data' || ev === undefined) {\n this[DATALISTENERS] = 0\n if (!this[DISCARDED] && !this[PIPES].length) {\n this[FLOWING] = false\n }\n }\n return ret\n }\n\n /**\n * true if the 'end' event has been emitted\n */\n get emittedEnd() {\n return this[EMITTED_END]\n }\n\n [MAYBE_EMIT_END]() {\n if (\n !this[EMITTING_END] &&\n !this[EMITTED_END] &&\n !this[DESTROYED] &&\n this[BUFFER].length === 0 &&\n this[EOF]\n ) {\n this[EMITTING_END] = true\n this.emit('end')\n this.emit('prefinish')\n this.emit('finish')\n if (this[CLOSED]) this.emit('close')\n this[EMITTING_END] = false\n }\n }\n\n /**\n * Mostly identical to `EventEmitter.emit`, with the following\n * behavior differences to prevent data loss and unnecessary hangs:\n *\n * If the stream has been destroyed, and the event is something other\n * than 'close' or 'error', then `false` is returned and no handlers\n * are called.\n *\n * If the event is 'end', and has already been emitted, then the event\n * is ignored. If the stream is in a paused or non-flowing state, then\n * the event will be deferred until data flow resumes. If the stream is\n * async, then handlers will be called on the next tick rather than\n * immediately.\n *\n * If the event is 'close', and 'end' has not yet been emitted, then\n * the event will be deferred until after 'end' is emitted.\n *\n * If the event is 'error', and an AbortSignal was provided for the stream,\n * and there are no listeners, then the event is ignored, matching the\n * behavior of node core streams in the presense of an AbortSignal.\n *\n * If the event is 'finish' or 'prefinish', then all listeners will be\n * removed after emitting the event, to prevent double-firing.\n */\n emit<Event extends keyof Events>(\n ev: Event,\n ...args: Events[Event]\n ): boolean {\n const data = args[0]\n // error and close are only events allowed after calling destroy()\n if (\n ev !== 'error' &&\n ev !== 'close' &&\n ev !== DESTROYED &&\n this[DESTROYED]\n ) {\n return false\n } else if (ev === 'data') {\n return !this[OBJECTMODE] && !data\n ? false\n : this[ASYNC]\n ? (defer(() => this[EMITDATA](data as RType)), true)\n : this[EMITDATA](data as RType)\n } else if (ev === 'end') {\n return this[EMITEND]()\n } else if (ev === 'close') {\n this[CLOSED] = true\n // don't emit close before 'end' and 'finish'\n if (!this[EMITTED_END] && !this[DESTROYED]) return false\n const ret = super.emit('close')\n this.removeAllListeners('close')\n return ret\n } else if (ev === 'error') {\n this[EMITTED_ERROR] = data\n super.emit(ERROR, data)\n const ret =\n !this[SIGNAL] || this.listeners('error').length\n ? super.emit('error', data)\n : false\n this[MAYBE_EMIT_END]()\n return ret\n } else if (ev === 'resume') {\n const ret = super.emit('resume')\n this[MAYBE_EMIT_END]()\n return ret\n } else if (ev === 'finish' || ev === 'prefinish') {\n const ret = super.emit(ev)\n this.removeAllListeners(ev)\n return ret\n }\n\n // Some other unknown event\n const ret = super.emit(ev as string, ...args)\n this[MAYBE_EMIT_END]()\n return ret\n }\n\n [EMITDATA](data: RType) {\n for (const p of this[PIPES]) {\n if (p.dest.write(data) === false) this.pause()\n }\n const ret = this[DISCARDED] ? false : super.emit('data', data)\n this[MAYBE_EMIT_END]()\n return ret\n }\n\n [EMITEND]() {\n if (this[EMITTED_END]) return false\n\n this[EMITTED_END] = true\n this.readable = false\n return this[ASYNC]\n ? (defer(() => this[EMITEND2]()), true)\n : this[EMITEND2]()\n }\n\n [EMITEND2]() {\n if (this[DECODER]) {\n const data = this[DECODER].end()\n if (data) {\n for (const p of this[PIPES]) {\n p.dest.write(data as RType)\n }\n if (!this[DISCARDED]) super.emit('data', data)\n }\n }\n\n for (const p of this[PIPES]) {\n p.end()\n }\n const ret = super.emit('end')\n this.removeAllListeners('end')\n return ret\n }\n\n /**\n * Return a Promise that resolves to an array of all emitted data once\n * the stream ends.\n */\n async collect(): Promise<RType[] & { dataLength: number }> {\n const buf: RType[] & { dataLength: number } = Object.assign([], {\n dataLength: 0,\n })\n if (!this[OBJECTMODE]) buf.dataLength = 0\n // set the promise first, in case an error is raised\n // by triggering the flow here.\n const p = this.promise()\n this.on('data', c => {\n buf.push(c)\n if (!this[OBJECTMODE])\n buf.dataLength += (c as Minipass.BufferOrString).length\n })\n await p\n return buf\n }\n\n /**\n * Return a Promise that resolves to the concatenation of all emitted data\n * once the stream ends.\n *\n * Not allowed on objectMode streams.\n */\n async concat(): Promise<RType> {\n if (this[OBJECTMODE]) {\n throw new Error('cannot concat in objectMode')\n }\n const buf = await this.collect()\n return (\n this[ENCODING]\n ? buf.join('')\n : Buffer.concat(buf as Buffer[], buf.dataLength)\n ) as RType\n }\n\n /**\n * Return a void Promise that resolves once the stream ends.\n */\n async promise(): Promise<void> {\n return new Promise<void>((resolve, reject) => {\n this.on(DESTROYED, () => reject(new Error('stream destroyed')))\n this.on('error', er => reject(er))\n this.on('end', () => resolve())\n })\n }\n\n /**\n * Asynchronous `for await of` iteration.\n *\n * This will continue emitting all chunks until the stream terminates.\n */\n [Symbol.asyncIterator](): AsyncGenerator<RType, void, void> {\n // set this up front, in case the consumer doesn't call next()\n // right away.\n this[DISCARDED] = false\n let stopped = false\n const stop = async (): Promise<IteratorReturnResult<void>> => {\n this.pause()\n stopped = true\n return { value: undefined, done: true }\n }\n const next = (): Promise<IteratorResult<RType, void>> => {\n if (stopped) return stop()\n const res = this.read()\n if (res !== null) return Promise.resolve({ done: false, value: res })\n\n if (this[EOF]) return stop()\n\n let resolve!: (res: IteratorResult<RType>) => void\n let reject!: (er: unknown) => void\n const onerr = (er: unknown) => {\n this.off('data', ondata)\n this.off('end', onend)\n this.off(DESTROYED, ondestroy)\n stop()\n reject(er)\n }\n const ondata = (value: RType) => {\n this.off('error', onerr)\n this.off('end', onend)\n this.off(DESTROYED, ondestroy)\n this.pause()\n resolve({ value, done: !!this[EOF] })\n }\n const onend = () => {\n this.off('error', onerr)\n this.off('data', ondata)\n this.off(DESTROYED, ondestroy)\n stop()\n resolve({ done: true, value: undefined })\n }\n const ondestroy = () => onerr(new Error('stream destroyed'))\n return new Promise<IteratorResult<RType>>((res, rej) => {\n reject = rej\n resolve = res\n this.once(DESTROYED, ondestroy)\n this.once('error', onerr)\n this.once('end', onend)\n this.once('data', ondata)\n })\n }\n\n return {\n next,\n throw: stop,\n return: stop,\n [Symbol.asyncIterator]() {\n return this\n },\n }\n }\n\n /**\n * Synchronous `for of` iteration.\n *\n * The iteration will terminate when the internal buffer runs out, even\n * if the stream has not yet terminated.\n */\n [Symbol.iterator](): Generator<RType, void, void> {\n // set this up front, in case the consumer doesn't call next()\n // right away.\n this[DISCARDED] = false\n let stopped = false\n const stop = (): IteratorReturnResult<void> => {\n this.pause()\n this.off(ERROR, stop)\n this.off(DESTROYED, stop)\n this.off('end', stop)\n stopped = true\n return { done: true, value: undefined }\n }\n\n const next = (): IteratorResult<RType, void> => {\n if (stopped) return stop()\n const value = this.read()\n return value === null ? stop() : { done: false, value }\n }\n\n this.once('end', stop)\n this.once(ERROR, stop)\n this.once(DESTROYED, stop)\n\n return {\n next,\n throw: stop,\n return: stop,\n [Symbol.iterator]() {\n return this\n },\n }\n }\n\n /**\n * Destroy a stream, preventing it from being used for any further purpose.\n *\n * If the stream has a `close()` method, then it will be called on\n * destruction.\n *\n * After destruction, any attempt to write data, read data, or emit most\n * events will be ignored.\n *\n * If an error argument is provided, then it will be emitted in an\n * 'error' event.\n */\n destroy(er?: unknown) {\n if (this[DESTROYED]) {\n if (er) this.emit('error', er)\n else this.emit(DESTROYED)\n return this\n }\n\n this[DESTROYED] = true\n this[DISCARDED] = true\n\n // throw away all buffered data, it's never coming out\n this[BUFFER].length = 0\n this[BUFFERLENGTH] = 0\n\n const wc = this as Minipass<RType, WType, Events> & {\n close?: () => void\n }\n if (typeof wc.close === 'function' && !this[CLOSED]) wc.close()\n\n if (er) this.emit('error', er)\n // if no error to emit, still reject pending promises\n else this.emit(DESTROYED)\n\n return this\n }\n\n /**\n * Alias for {@link isStream}\n *\n * Former export location, maintained for backwards compatibility.\n *\n * @deprecated\n */\n static get isStream() {\n return isStream\n }\n}\n"]} |