Ok Build - a build system that's ok, as far as build systems go

.eslintrc

{
  "ecmaFeatures": {
    "globalReturn": true,
    "jsx": true,
    "modules": true
  },

  "env": {
    "browser": false,
    "es6": true,
    "node": true,
  },

  "globals": {
    "document": false,
    "escape": false,
    "navigator": false,
    "unescape": false,
    "window": false
  },

  "plugins": [
    "react"
  ],

  "rules": {
    "block-scoped-var": 0,
    "brace-style": [2, "1tbs", { "allowSingleLine": true }],
    "camelcase": 0,
    "comma-dangle": [2, "never"],
    "comma-spacing": [2, { "before": false, "after": true }],
    "comma-style": [2, "last"],
    "complexity": 0,
    "consistent-return": 0,
    "consistent-this": 0,
    "curly": [2, "multi-line"],
    "default-case": 0,
    "dot-notation": 0,
    "eol-last": 2,
    "eqeqeq": [2, "allow-null"],
    "func-names": 0,
    "func-style": [0, "declaration"],
    "generator-star": [2, "middle"],
    "guard-for-in": 0,
    "handle-callback-err": [2, "^(err|error|anySpecificError)$" ],
    "indent": [2, 2],
    "key-spacing": [2, { "beforeColon": false, "afterColon": true }],
    "max-depth": 0,
    "max-len": 0,
    "max-nested-callbacks": 0,
    "max-params": 0,
    "max-statements": 0,
    "new-cap": [2, { "newIsCap": true, "capIsNew": false }],
    "new-parens": 2,
    "no-alert": 2,
    "no-array-constructor": 2,
    "no-bitwise": 0,
    "no-caller": 2,
    "no-catch-shadow": 0,
    "no-cond-assign": 2,
    "no-console": 0,
    "no-constant-condition": 0,
    "no-control-regex": 2,
    "no-debugger": 2,
    "no-delete-var": 2,
    "no-div-regex": 0,
    "no-dupe-args": 2,
    "no-dupe-keys": 2,
    "no-duplicate-case": 2,
    "no-else-return": 0,
    "no-empty": 0,
    "no-empty-class": 2,
    "no-empty-label": 2,
    "no-eq-null": 0,
    "no-eval": 2,
    "no-ex-assign": 2,
    "no-extend-native": 2,
    "no-extra-bind": 2,
    "no-extra-boolean-cast": 2,
    "no-extra-parens": 0,
    "no-extra-semi": 0,
    "no-extra-strict": 0,
    "no-fallthrough": 2,
    "no-floating-decimal": 2,
    "no-func-assign": 2,
    "no-implied-eval": 2,
    "no-inline-comments": 0,
    "no-inner-declarations": [2, "functions"],
    "no-invalid-regexp": 2,
    "no-irregular-whitespace": 2,
    "no-iterator": 2,
    "no-label-var": 2,
    "no-labels": 2,
    "no-lone-blocks": 0,
    "no-lonely-if": 0,
    "no-loop-func": 0,
    "no-mixed-requires": [0, false],
    "no-mixed-spaces-and-tabs": [2, false],
    "no-multi-spaces": 2,
    "no-multi-str": 2,
    "no-multiple-empty-lines": [2, { "max": 1 }],
    "no-native-reassign": 2,
    "no-negated-in-lhs": 2,
    "no-nested-ternary": 0,
    "no-new": 2,
    "no-new-func": 2,
    "no-new-object": 2,
    "no-new-require": 2,
    "no-new-wrappers": 2,
    "no-obj-calls": 2,
    "no-octal": 2,
    "no-octal-escape": 2,
    "no-path-concat": 0,
    "no-plusplus": 0,
    "no-process-env": 0,
    "no-process-exit": 0,
    "no-proto": 2,
    "no-redeclare": 2,
    "no-regex-spaces": 2,
    "no-reserved-keys": 0,
    "no-restricted-modules": 0,
    "no-return-assign": 2,
    "no-script-url": 0,
    "no-self-compare": 2,
    "no-sequences": 2,
    "no-shadow": 0,
    "no-shadow-restricted-names": 2,
    "no-spaced-func": 2,
    "no-sparse-arrays": 2,
    "no-sync": 0,
    "no-ternary": 0,
    "no-throw-literal": 2,
    "no-trailing-spaces": 2,
    "no-undef": 2,
    "no-undef-init": 2,
    "no-undefined": 0,
    "no-underscore-dangle": 0,
    "no-unreachable": 2,
    "no-unused-expressions": 0,
    "no-unused-vars": [2, { "vars": "all", "args": "none" }],
    "no-use-before-define": 0,
    "no-var": 0,
    "no-void": 0,
    "no-warning-comments": [0, { "terms": ["todo", "fixme", "xxx"], "location": "start" }],
    "no-with": 2,
    "no-wrap-func": 2,
    "one-var": 0,
    "operator-assignment": [0, "always"],
    "padded-blocks": [2, "never"],
    "quote-props": 0,
    "quotes": [2, "single", "avoid-escape"],
    "radix": 2,
    "react/display-name": 0,
    "react/jsx-boolean-value": 2,
    "react/jsx-quotes": [2, "double", "avoid-escape"],
    "react/jsx-no-undef": 2,
    "react/jsx-sort-props": 0,
    "react/jsx-uses-react": 2,
    "react/jsx-uses-vars": 2,
    "react/no-did-mount-set-state": 2,
    "react/no-did-update-set-state": 2,
    "react/no-multi-comp": 2,
    "react/no-unknown-property": 2,
    "react/prop-types": 2,
    "react/react-in-jsx-scope": 2,
    "react/self-closing-comp": 2,
    "semi": [2, "never"],
    "semi-spacing": 0,
    "sort-vars": 0,
    "space-after-keywords": [2, "always"],
    "space-before-blocks": [2, "always"],
    "space-in-brackets": 0,
    "space-in-parens": [2, "never"],
    "space-infix-ops": 2,
    "space-return-throw-case": 2,
    "space-unary-ops": [2, { "words": true, "nonwords": false }],
    "spaced-line-comment": [2, "always"],
    "strict": 0,
    "use-isnan": 2,
    "valid-jsdoc": 0,
    "valid-typeof": 2,
    "vars-on-top": 0,
    "wrap-iife": [2, "any"],
    "wrap-regex": 0,
    "yoda": [2, "never"]
  }
}

gulpfile.js

// Build tasks
// ===========

var gulp  = require('gulp');
var utils = require('gulp-util');

// Testing
var jest  = require('gulp-jest');
var packageJson = Object.create(require('./package.json'));

gulp.task('jest', function() {
  return gulp.src(".")
    .pipe(jest(packageJson.jest));
});

// Build configurations.
var path = require('path');

var Config = {
  srcDir:         path.resolve('./src'),
  publicDir:      path.resolve('./public')
};

// Environment detection
var currentEnv = process.env.NODE_ENV === 'production' ?
  'production' : 'development';
utils.log(
  'Environment', utils.colors.blue(currentEnv)
);

// Webpack build
var webpack           = require('webpack');
var webpackConfig     = Object.create(require('./webpack.config.js'));
var CompressionPlugin = require('compression-webpack-plugin');

gulp.task('webpack:build', function(callback) {
  webpackConfig.output.path = Config.publicDir;
  webpackConfig.devtool = '#source-map';
  webpackConfig.progress = true;

  if (currentEnv === 'production') {
    webpackConfig.bail = true;
    webpackConfig.debug = false;
    webpackConfig.profile = false;
    webpackConfig.entry = ['./src/boot'];
    webpackConfig.output.pathInfo = false;
    webpackConfig.plugins.push(
      new webpack.DefinePlugin({
        'process.env': currentEnv
      }),
      new webpack.optimize.DedupePlugin(),
      new webpack.optimize.UglifyJsPlugin({
        mangle: { except: ['require', 'export', 'import', '$super'] },
        compress: {
          sequences: true,
          dead_code: true,
          conditionals: true,
          booleans: true,
          unused: true,
          if_return: true,
          join_vars: true,
          drop_console: true,
          warnings: false
        }
      }),
      new CompressionPlugin({
        asset: "{file}.gz",
        algorithm: "gzip",
        threshold: 10240,
        minRatio: 0.8
      })
    );
  }

  webpack(webpackConfig, function(err, stats) {
    if (err) throw new utils.PluginError('webpack:build', err);

    utils.log('Webpack', stats.toString({
      colors: true,
      chunks: false
    }));

    callback();
  });
});

// Webpack server
var WebpackDevServer  = require('webpack-dev-server');
var WebpackNotifier = require('webpack-notifier')

gulp.task('webpack:serve', function() {
  webpackConfig.plugins.push(new WebpackNotifier({ title: 'Build' }));

  var hostname = 'localhost';
  var port = 4567;
  var compiler = webpack(webpackConfig);
  var server = new WebpackDevServer(compiler, {
    contentBase: webpackConfig.contentBase,
    publicPath: webpackConfig.output.publicPath,
    historyApiFallback: true,
    noInfo: true,
    hot: true,
    stats: {
      colors: true,
      chunks: false
    }
  });
  server.listen(port, hostname, function(err) {
    if (err) throw new utils.PluginError('webpack:serve', err);

    utils.log("Starting", utils.colors.red("Webpack Dev Server"));
    utils.log(
      "Listening on",
      utils.colors.red("http://" + hostname + ":" + port)
    );
  });
});

// ESLint. I can't figure out where gulp-eslint is trying to find the
// .eslintignore file, so I'm relying on gulp for exclusions for now. Excluding
// tests because otherwise it screams about Jest/Jasmine magic.
var eslint = require('gulp-eslint');

gulp.task('eslint', function() {
  return gulp.src([Config.srcDir + '/**/*.js*', '!**/tests/**'])
    .pipe(eslint())
    .pipe(eslint.format())
});

// Watch.
gulp.task('watch', function() {
  gulp.watch(Config.srcDir + '/**/*.js*',  ['eslint', 'jest']);
});

gulp.task('build',    ['eslint', 'webpack:build']);
gulp.task('default',  ['webpack:serve', 'build', 'watch']);

index.scss

// Sass index file
// ===============
//
// Because CSS load order matters, we can’t rely on simply bundling everything.
// So this manifest is still needed.

// Dependencies
// @import …

// Components
@import '../components/**/*';

package.json

{
  "dependencies": {
    "airwaves": "^0.3.0",
    "classnames": "^2.1.3",
    "lodash": "^3.10.0",
    "rc-animate": "^1.1.0",
    "react": "0.13.3",
    "react-mixin": "^1.6.0",
    "superagent": "^1.2.0",
    "tinycolor2": "^1.1.2"
  },
  "scripts": {
    "test": "BABEL_JEST_STAGE=1 jest"
  },
  "jest": {
    "scriptPreprocessor": "node_modules/babel-jest",
    "testDirectoryName": "tests",
    "setupEnvScriptFile": "tests/setup.js",
    "modulePathIgnorePatterns": [
      "node_modules",
      "tests/mocks",
      "tests/setup.js"
    ],
    "unmockedModulePathPatterns": [
      "node_modules/react",
      "node_modules/rosie",
      "node_modules/moment",
      "src/components",
      "tests/mocks",
      "object-assign",
      "babel"
    ],
    "moduleFileExtensions": [
      "js",
      "json",
      "jsx"
    ],
    "testFileExtensions": [
      "js"
    ]
  },
  "devDependencies": {
    "autoprefixer-loader": "^2.0.0",
    "babel": "^5.8.3",
    "babel-core": "^5.8.3",
    "babel-eslint": "^3.1.26",
    "babel-jest": "^5.3.0",
    "babel-loader": "^5.3.2",
    "babel-runtime": "^5.8.3",
    "compression-webpack-plugin": "^0.2.0",
    "css-loader": "^0.15.5",
    "eslint": "^0.24.1",
    "eslint-plugin-react": "^3.0.0",
    "gulp": "^3.9.0",
    "gulp-eslint": "^0.15.0",
    "gulp-jest": "^0.4.0",
    "gulp-util": "^3.0.6",
    "jest-cli": "^0.4.16",
    "jsx-loader": "^0.13.2",
    "object-assign": "^3.0.0",
    "react-hot-loader": "^1.2.8",
    "react-tools": "0.13.3",
    "ruby-sass-loader": "^0.2.0",
    "style-loader": "^0.12.3",
    "webpack": "^1.10.3",
    "webpack-dev-server": "^1.10.1",
    "webpack-notifier": "^1.2.1"
  }
}

webpack.config.js

// Webpack configuration
// =====================

var path = require('path');
var webpack = require('webpack');

module.exports = {
  contentBase: __dirname + '/public',
  devtool: 'eval-source-map',
  entry: [
    'webpack-dev-server/client?http://localhost:4567',
    'webpack/hot/dev-server',
    './src/boot'
  ],
  output: {
    pathInfo: true,
    path: __dirname + '/public/',
    publicPath: '',
    filename: 'bundle.js'
  },
  module: {
    loaders: [
      {
        test: /\.js[x]?$/,
        exclude: /node_modules/,
        loaders: ['react-hot', 'babel-loader?optional=runtime']
      },
      {
        test: /\.scss$/,
        exclude: /node_modules/,
        loader: 'style!css!autoprefixer!ruby-sass?requires[]=sass-globbing'
      }
    ]
  },
  resolve: {
    extensions: ['', '.js', '.json', '.jsx']
  },
  plugins: [
    new webpack.HotModuleReplacementPlugin(),
    new webpack.NoErrorsPlugin()
  ]
};

Thanks, brother. We'll futz with it and tell you what you think. Right @gon, @cazrin?