Browserify with Gulp

build-browserify.js

'use strict';

var gulp = require('gulp');
var gutil = require('gulp-util');
var source = require('vinyl-source-stream');
var R = require('ramda');

// Browserify example from: https://github.com/gulpjs/gulp/blob/master/docs/recipes/fast-browserify-builds-with-watchify.md
var browserify = require('browserify');
var watchify = require('watchify');

var opts = watchify.args;

// [string, string] ➔ [string, Bundle]
var createBundle = R.curry(function(wrapper, config){
    var entry = config[0];
    var target = config[1];
    return [target, wrapper(browserify(entry, opts))];
});
// string ➔ [string, Bundle] ➔ void ➔ Stream
var buildBundle = R.curry(function(targetDir, b, _){
    var target = b[0];
    var bundle = b[1];
    return bundle.bundle()
                 .on('error', gutil.log.bind(gutil, 'Browserify Error'))
                 .pipe(source(target))
                 .pipe(gulp.dest(targetDir));
});
// [string, Bundle] ➔ [string, Bundle]
var setupBundle = R.curry(function(bundleBuilder, bundle){
    var b = bundle[1];
    b.on('update', bundleBuilder(bundle));
    b.on('log', gutil.log);
    return bundle;
});
// (Bundle ➔ Bundle) ➔ string ➔ [string, string] ➔ void ➔ Stream
var buildBrowserifyTask = R.curry(function(wrapper, targetDir){
    var bundleBuilder = buildBundle(targetDir);
    return R.pipe(
        createBundle(wrapper),
        setupBundle(bundleBuilder),
        bundleBuilder
    );
});
// string ➔ [string, string] ➔ void ➔ Stream
// string = target directory
// [string, string] = [main file (with path), target filename]
// void ➔ Stream = Gulp task function
module.exports.watchBrowserify = buildBrowserifyTask(watchify);

// string ➔ [string, string] ➔ void ➔ Stream
module.exports.compileBrowserify = buildBrowserifyTask(R.identity);