8889841cindex.js000066600000006251150432036250006221 0ustar00'use strict' /* * merge2 * https://github.com/teambition/merge2 * * Copyright (c) 2014-2020 Teambition * Licensed under the MIT license. */ const Stream = require('stream') const PassThrough = Stream.PassThrough const slice = Array.prototype.slice module.exports = merge2 function merge2 () { const streamsQueue = [] const args = slice.call(arguments) let merging = false let options = args[args.length - 1] if (options && !Array.isArray(options) && options.pipe == null) { args.pop() } else { options = {} } const doEnd = options.end !== false const doPipeError = options.pipeError === true if (options.objectMode == null) { options.objectMode = true } if (options.highWaterMark == null) { options.highWaterMark = 64 * 1024 } const mergedStream = PassThrough(options) function addStream () { for (let i = 0, len = arguments.length; i < len; i++) { streamsQueue.push(pauseStreams(arguments[i], options)) } mergeStream() return this } function mergeStream () { if (merging) { return } merging = true let streams = streamsQueue.shift() if (!streams) { process.nextTick(endStream) return } if (!Array.isArray(streams)) { streams = [streams] } let pipesCount = streams.length + 1 function next () { if (--pipesCount > 0) { return } merging = false mergeStream() } function pipe (stream) { function onend () { stream.removeListener('merge2UnpipeEnd', onend) stream.removeListener('end', onend) if (doPipeError) { stream.removeListener('error', onerror) } next() } function onerror (err) { mergedStream.emit('error', err) } // skip ended stream if (stream._readableState.endEmitted) { return next() } stream.on('merge2UnpipeEnd', onend) stream.on('end', onend) if (doPipeError) { stream.on('error', onerror) } stream.pipe(mergedStream, { end: false }) // compatible for old stream stream.resume() } for (let i = 0; i < streams.length; i++) { pipe(streams[i]) } next() } function endStream () { merging = false // emit 'queueDrain' when all streams merged. mergedStream.emit('queueDrain') if (doEnd) { mergedStream.end() } } mergedStream.setMaxListeners(0) mergedStream.add = addStream mergedStream.on('unpipe', function (stream) { stream.emit('merge2UnpipeEnd') }) if (args.length) { addStream.apply(null, args) } return mergedStream } // check and pause streams for pipe. function pauseStreams (streams, options) { if (!Array.isArray(streams)) { // Backwards-compat with old-style streams if (!streams._readableState && streams.pipe) { streams = streams.pipe(PassThrough(options)) } if (!streams._readableState || !streams.pause || !streams.pipe) { throw new Error('Only readable stream can be merged.') } streams.pause() } else { for (let i = 0, len = streams.length; i < len; i++) { streams[i] = pauseStreams(streams[i], options) } } return streams } README.md000066600000007240150432036250006032 0ustar00# merge2 Merge multiple streams into one stream in sequence or parallel. [![NPM version][npm-image]][npm-url] [![Build Status][travis-image]][travis-url] [![Downloads][downloads-image]][downloads-url] ## Install Install with [npm](https://npmjs.org/package/merge2) ```sh npm install merge2 ``` ## Usage ```js const gulp = require('gulp') const merge2 = require('merge2') const concat = require('gulp-concat') const minifyHtml = require('gulp-minify-html') const ngtemplate = require('gulp-ngtemplate') gulp.task('app-js', function () { return merge2( gulp.src('static/src/tpl/*.html') .pipe(minifyHtml({empty: true})) .pipe(ngtemplate({ module: 'genTemplates', standalone: true }) ), gulp.src([ 'static/src/js/app.js', 'static/src/js/locale_zh-cn.js', 'static/src/js/router.js', 'static/src/js/tools.js', 'static/src/js/services.js', 'static/src/js/filters.js', 'static/src/js/directives.js', 'static/src/js/controllers.js' ]) ) .pipe(concat('app.js')) .pipe(gulp.dest('static/dist/js/')) }) ``` ```js const stream = merge2([stream1, stream2], stream3, {end: false}) //... stream.add(stream4, stream5) //.. stream.end() ``` ```js // equal to merge2([stream1, stream2], stream3) const stream = merge2() stream.add([stream1, stream2]) stream.add(stream3) ``` ```js // merge order: // 1. merge `stream1`; // 2. merge `stream2` and `stream3` in parallel after `stream1` merged; // 3. merge 'stream4' after `stream2` and `stream3` merged; const stream = merge2(stream1, [stream2, stream3], stream4) // merge order: // 1. merge `stream5` and `stream6` in parallel after `stream4` merged; // 2. merge 'stream7' after `stream5` and `stream6` merged; stream.add([stream5, stream6], stream7) ``` ```js // nest merge // equal to merge2(stream1, stream2, stream6, stream3, [stream4, stream5]); const streamA = merge2(stream1, stream2) const streamB = merge2(stream3, [stream4, stream5]) const stream = merge2(streamA, streamB) streamA.add(stream6) ``` ## API ```js const merge2 = require('merge2') ``` ### merge2() ### merge2(options) ### merge2(stream1, stream2, ..., streamN) ### merge2(stream1, stream2, ..., streamN, options) ### merge2(stream1, [stream2, stream3, ...], streamN, options) return a duplex stream (mergedStream). streams in array will be merged in parallel. ### mergedStream.add(stream) ### mergedStream.add(stream1, [stream2, stream3, ...], ...) return the mergedStream. ### mergedStream.on('queueDrain', function() {}) It will emit 'queueDrain' when all streams merged. If you set `end === false` in options, this event give you a notice that should add more streams to merge or end the mergedStream. #### stream *option* Type: `Readable` or `Duplex` or `Transform` stream. #### options *option* Type: `Object`. * **end** - `Boolean` - if `end === false` then mergedStream will not be auto ended, you should end by yourself. **Default:** `undefined` * **pipeError** - `Boolean` - if `pipeError === true` then mergedStream will emit `error` event from source streams. **Default:** `undefined` * **objectMode** - `Boolean` . **Default:** `true` `objectMode` and other options(`highWaterMark`, `defaultEncoding` ...) is same as Node.js `Stream`. ## License MIT © [Teambition](https://www.teambition.com) [npm-url]: https://npmjs.org/package/merge2 [npm-image]: http://img.shields.io/npm/v/merge2.svg [travis-url]: https://travis-ci.org/teambition/merge2 [travis-image]: http://img.shields.io/travis/teambition/merge2.svg [downloads-url]: https://npmjs.org/package/merge2 [downloads-image]: http://img.shields.io/npm/dm/merge2.svg?style=flat-square LICENSE000066600000002072150432036250005556 0ustar00The MIT License (MIT) Copyright (c) 2014-2020 Teambition Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. package.json000066600000001476150432036250007046 0ustar00{ "name": "merge2", "description": "Merge multiple streams into one stream in sequence or parallel.", "authors": [ "Yan Qing " ], "license": "MIT", "version": "1.4.1", "main": "./index.js", "repository": { "type": "git", "url": "git@github.com:teambition/merge2.git" }, "homepage": "https://github.com/teambition/merge2", "keywords": [ "merge2", "multiple", "sequence", "parallel", "merge", "stream", "merge stream", "sync" ], "engines": { "node": ">= 8" }, "dependencies": {}, "devDependencies": { "standard": "^14.3.4", "through2": "^3.0.1", "thunks": "^4.9.6", "tman": "^1.10.0", "to-through": "^2.0.0" }, "scripts": { "test": "standard && tman" }, "files": [ "README.md", "index.js" ] }