gulp-concatenate/index.js

concatenate files like cat command

"use strict";

Object.defineProperty(exports, "__esModule", {
    value: true
});

var _stream = require("stream");

var _vinyl = require("vinyl");

var _vinyl2 = _interopRequireDefault(_vinyl);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

class Concat extends _stream.Transform {

    constructor(fileName) {
        super({ objectMode: true });
        this.data = Buffer.from("");
        this.fileName = fileName;
    }

    // $FlowIgnore: Gulp uses object-mode but the flow-typed doesn't respect it, so I suppress warning.
    _transform(chunk, encoding, callback) {
        this.data = Buffer.concat([this.data, chunk.contents]);
        callback();
    }

    _flush(callback) {
        // $FlowIgnore: Gulp uses object-mode but the default node.js flow type doesn't respect it, so I suppress warning.
        this.push(new _vinyl2.default({
            cwd: process.cwd(),
            path: this.fileName,
            contents: this.data
        }));
        callback();
    }
}

exports.default = fileName => new Concat(fileName);