Monorepo Structure (Using Ocular)

[kenns29]

Tested using the website and example folder:
installation steps:

1. yarn
2. yarn build
3. cd example; yarn
4. cd website; yarn; yarn start

Notes:

1. The packages folder is renamed as "modules", following ocular convention.
2. Each module name uses the @MLVis namespace, e.g. @mlvis/feature-list-view.
3. moved the "react", "antd", "styled-components" and "reselect" dependency of each module to peerDependencies.
4. temporarily added these dependencies ("react", "antd", "styled-components" and "reselect") into the devDependencies of the root package.json for development purpose (Ib mentioned it may be better to also add these to devDependencies in each of the modules so that they don't have to appear as devDependencies in the root package.json).
5. Please pay attention to alias.config.js and make sure it is satisfactory:

const resolve = require('path').resolve;
const fs = require('fs');

const ROOT = resolve(__dirname, '.');
const MODULES_ROOT = resolve(ROOT, 'modules');
const ROOT_ALIAS = 'packages';

module.exports = () =>
  fs.readdirSync(MODULES_ROOT).reduce((aliasMap, pkg) => {
    // src/some-package
    const packagePath = resolve(MODULES_ROOT, pkg);
    if (!fs.lstatSync(packagePath).isDirectory()) {
      return aliasMap;
    }
    // packages/some-package/package.json
    const packageJsonPath = resolve(packagePath, 'package.json');
    // bypass alias mapping if no package.json exists
    if (!fs.existsSync(packageJsonPath)) {
      return aliasMap;
    }
    const packageInfo = require(packageJsonPath);
    // @mlvis/some-package => some-package
    const packageName = packageInfo.name.replace(/^(@mlvis\/)/, '');

    // TODO: use this instead when each module is done refactoring
    // {@mlvis/some-package: './modules/some-package/src'}
    // aliasMap[packageInfo.name] = resolve(packageDir, packageName, 'src');

    // TODO: replace all reference to packages/... to @mlvis/some-package inside
    // each module
    // {'packages/some-package' : './modules/some-package/src'}
    aliasMap[`${ROOT_ALIAS}/${pkg}`] = resolve(MODULES_ROOT, pkg, 'src');
    return aliasMap;
  }, {});

6. The current structure requires each module to be published under a common org namespace in npm (considering @MLVis). We may also consider the option to have a large module with sub-packages, e.g. mlvis/manifold. However, this approach is currently not supported by ocular dev tools.

[CLAassistant]

All committers have signed the CLA.

[chrisirhc]

Looks like the tests failed on eslint

[gnavvy]

nit: missing the description field in feature-list-view & mlvis-common.
The description for multi-way-plot, segment-filters, etc. are off (currently copied from Manifold's).

Otherwise LGTM.

[Firenze11]

Please also change kepler version to 1.1.5. Otherwise LGTM