@nurun-sf/spark-component/lib/get-external-deps.js

A tool for building spark components

'use strict';

var path = require('path');
var getClassName = require('./get-class-name');
var brand = require('./brand');

var LIBRARY_NAME = brand.name;

function getJson(filepath) {
  return require(path.join(process.cwd(), filepath));
}

var pkg = getJson('package.json');
var deps = {};

// If there are dependencies listed in package.json, add them.
if (pkg.dependencies) {
  deps = pkg.dependencies;
}

// bower.json may not exist, so wrap in a try/catch.
try {
  var bower = getJson('bower.json');
  Object.assign(deps, bower.dependencies);
} catch (e) {}

// Allow packages to be bundled with the component.
try {
  var packagesToBundle = getJson('bundle.json');
  packagesToBundle.forEach(function (packageName) {
    delete deps[packageName];
  });
} catch (e) {}

// Mapping of dependencies which export themselves differently than the name
// of the package.
var SPECIAL = {
  jquery: 'jQuery',
  modernizr: 'Modernizr',
  underscore: '_',
  lodash: '_',
  'tiny-emitter': 'TinyEmitter',
};

// In case there is a new dependency which exposes itself differntly, allow
// the above mapping to be added to.
try {
  var customExternals = getJson('externals.json');
  Object.assign(SPECIAL, customExternals);
} catch (e) {}

function getGlobalName(packageName) {
  if (packageName.startsWith(LIBRARY_NAME)) {
    return getClassName(packageName);
  } else if (SPECIAL[packageName]) {
    return SPECIAL[packageName];
  }

  return packageName;
}

// Figure out external dependencies which should not be bundled.
// https://github.com/webpack/webpack/tree/master/examples/externals
module.exports = function () {
  return Object.keys(deps).reduce(function (obj, name) {

    obj[name] = {
      root: getGlobalName(name),
      commonjs: name,
      commonjs2: name,
      amd: name,
    };

    return obj;
  }, {});
};