just-build/dist/color-transform.js

A simple task runner that doesn't bloat your package

var ref = require('stream');
var Transform = ref.Transform;
var clr = require('./console-colors');
var ERROR_COLOR = clr.RED;
var WARNING_COLOR = clr.YELLOW + clr.BOLD;
var STDERR_COLOR = clr.LIGHT_RED;

var ColorTransform = (function (Transform) {
    function ColorTransform (isStdErr) {
        Transform.call(this, {});
        this.isStdErr = isStdErr;
    }

    if ( Transform ) ColorTransform.__proto__ = Transform;
    ColorTransform.prototype = Object.create( Transform && Transform.prototype );
    ColorTransform.prototype.constructor = ColorTransform;

    ColorTransform.prototype._transform = function _transform (chunk, encoding, callback) {
        try {
            if (chunk && chunk.toString) {
                var ref =
                    typeof chunk === 'string' ?
                        [chunk, encoding] :
                        [chunk.toString("utf-8"), "utf-8"];
                var strChunk = ref[0];
                var strEnc = ref[1];
                if (/error(\s|\:)/i.test(strChunk)) {
                    this.push(ERROR_COLOR+strChunk+clr.RESET, strEnc);
                } else if (/warning(\s|\:)/i.test(strChunk)) {
                    this.push(WARNING_COLOR+strChunk+clr.RESET, strEnc);
                } else if (this.isStdErr) {
                    this.push(STDERR_COLOR+strChunk+clr.RESET, strEnc);
                } else {
                    this.push(chunk, encoding);
                }
            } else {
                this.push(chunk, encoding);
            }
        } catch(err) {
            this.push(chunk, encoding);
        }
        callback();
    };

    return ColorTransform;
}(Transform));

module.exports = { ColorTransform: ColorTransform };