build-npm.js

import fs from 'fs-extra';
import path from 'path';
import { collectImportsSync } from './babel-collect-imports';
import packageJSON from '../package.json';

const { internal } = collectImportsSync(
    path.resolve(__dirname, '../src/js/index.js'),
    undefined,
    undefined,
    {
        // replace default, node import by browser import
        pathFilter: (_pkg, _path, relativePath) => {
            if (relativePath === 'src/js/env/node') {
                return 'src/js/env/browser';
            }
            if (relativePath === 'src/js/env/node/index') {
                return 'src/js/env/browser/index';
            }
        },
    },
);

const SRC = path.resolve(__dirname, '../src/js');
const TS = path.resolve(__dirname, '../src/ts/types');
const NPM = path.resolve(__dirname, '../npm');
const LIB = path.resolve(__dirname, '../npm/lib');

internal.forEach(file => {
    const libFile = file.replace(SRC, LIB);
    fs.copySync(file, libFile);
    fs.copySync(file, `${libFile}.flow`);
});

const ignored = ['__tests__', '__fixtures__', '_old', 'icons', 'udev'];
const shouldIgnore = src => ignored.find(i => src.indexOf(i) >= 0);

// copy typescript
fs.copySync(TS, `${LIB}/typescript`, {
    filter: (src, _dest) => {
        if (shouldIgnore(src)) return false;
        if (src.indexOf('.json') >= 0) return false;
        return true;
    },
});

delete packageJSON.devDependencies;
delete packageJSON.extendedDependencies;
delete packageJSON.scripts;
delete packageJSON.bin;
delete packageJSON['react-native'];
delete packageJSON.private;
delete packageJSON.extendedDependencies;

packageJSON.main = 'lib/index.js';
packageJSON.types = 'lib/typescript/index.d.ts';

fs.writeFileSync(
    path.resolve(NPM, 'package.json'),
    JSON.stringify(packageJSON, null, '  '),
    'utf-8',
);

fs.copySync(
    path.resolve(SRC, 'env/node/index-empty.js'),
    path.resolve(NPM, 'lib/env/node/index.js'),
);
fs.copySync(
    path.resolve(SRC, 'env/node/index-empty.js'),
    path.resolve(NPM, 'lib/env/node/index.js.flow'),
);
fs.copySync(path.resolve(NPM, '../README.md'), path.resolve(NPM, 'README.md'));
fs.copySync(path.resolve(NPM, '../LICENSE.md'), path.resolve(NPM, 'LICENSE.md'));
fs.copySync(path.resolve(NPM, '../CHANGELOG.md'), path.resolve(NPM, 'CHANGELOG.md'));