build.js

process.env.NODE_ENV = 'production'

var path = require('path')
var webpack = require('webpack')
var axios = require('axios')
var fs = require('fs')

var config = []

/* getting configs from server */
function getConfigs () {
  return Promise.all([
    axios.get('https://flespi.io/platform/api.json').then(resp => resp.data),
    axios.get('https://flespi.io/gw/api.json').then(resp => resp.data),
    axios.get('https://flespi.io/storage/api.json').then(resp => resp.data),
    axios.get('https://flespi.io/mqtt/api.json').then(resp => resp.data),
    axios.get('https://flespi.io/auth/api.json').then(resp => resp.data)
  ])
}

/* generate config by config from flespi */
function generate (config) {
  /* recursive resolve references by config */
  function refResolver (ref) {
    const parts = ref.split('/').slice(1)
    const result = parts.reduce((result, part) => { return result[part] }, config)
    if (result.$ref) { refResolver(result.$ref) } else { return result }
  }
  /* getting modified parameters by array of parameters from config */
  function getParams (parameters) {
    return parameters
      ? parameters.reduce((result, param) => {
        if (param.$ref) {
          const resolved = refResolver(param.$ref)
          result.push({ name: resolved.name, in: resolved.in })
        } else {
          result.push({ name: param.name, in: param.in })
        }
        return result
      }, [])
      : []
  }

  var result = { basePath: config.basePath, paths: {} }

  Object.keys(config.paths).forEach((path) => {
    var configByPath = config.paths[path],
      methods = Object.keys(configByPath).filter((method) => method !== 'parameters')

    result.paths[path] = {}
    if (configByPath.parameters) {
      result.paths[path].parameters = getParams(configByPath.parameters)
    }
    methods.forEach((method) => {
      result.paths[path][method] = {}
      if (config.paths[path][method].parameters) {
        result.paths[path][method].parameters = getParams(config.paths[path][method].parameters)
      }
    })
  })

  return result
}

/* generate config method */
function generateConfig (name) {
  var config = {
    mode: 'production',
    context: path.resolve(__dirname, 'src'),
    entry: ['./index.js'],
    output: {
      path: path.resolve(__dirname, 'dist'),
      filename: name + '.js',
      library: 'flespiIO',
      libraryTarget: 'umd'
    },
    optimization: {
      minimize: true
    },
    externals: [
      {
        mqtt: 'mqtt',
        axios: 'axios'
      },
      /^lodash/i
    ],
    module: {
      rules: [
        {
          test: /\.js$/,
          exclude: /node_modules/,
          loader: 'babel-loader'
        }
      ]
    },
    plugins: [
      // Work around for Buffer is undefined:
      // https://github.com/webpack/changelog-v5/issues/10
      new webpack.ProvidePlugin({
          Buffer: ['buffer', 'Buffer'],
      }),
      new webpack.ProvidePlugin({
          process: 'process/browser',
      }),
    ],
    resolve: {
      extensions: [ '.ts', '.js' ],
      fallback: {
          "stream": require.resolve("stream-browserify"),
          "buffer": require.resolve("buffer")
      }
    }
  }
  if (name === 'main') {
    config.output.libraryExport = 'default'
  }
  /* for to make vue plugin rewrite entry */
  if (name === 'vue-plugin' || name === 'vue3-plugin' || name === 'rest' || name === 'mqtt') {
    config.entry = [`./${name}.js`]
  }
  // if (name === 'vue3-plugin') {
  //   config.output.libraryTarget = 'var'
  // }
  if (name === 'module' || name === 'vue-plugin' || name === 'vue3-plugin' || name === 'node' || name === 'rest' || name === 'mqtt') {
    config.externals = {
      axios: 'axios',
      // 'lodash/merge': 'lodash/merge',
      // 'lodash/uniqueId': 'lodash/uniqueId',
      'async-mqtt': 'async-mqtt',
      mqtt: 'mqtt',
      'form-data': 'form-data'
    }
    // config.output.libraryExport = 'default'
  }
  if (name === 'vue3-plugin') {
    config.output.chunkFormat = 'module'
    config.output.libraryTarget = 'module'
    config.target = 'web'
    config.experiments = { outputModule: true }
    delete config.output.library
  }
  if (name === 'node') {
    config.target = 'node'
    config.output.libraryExport = 'default'
    config.module.rules.unshift(
      {
        test: /\.js$/,
        loader: 'shebang-loader'
      }
    )
  }
  return config
}

/* make build by name */
getConfigs()
  .then((configs) => {
    configs = configs.map(config => generate(config))
    fs.writeFileSync(path.resolve(__dirname, 'src', 'configs.json'), JSON.stringify(configs), 'utf8')
  })
  .then(() => {
    ['main', 'module', 'vue-plugin', 'vue3-plugin', 'node', 'rest', 'mqtt'].forEach(function (name) {
      config.push(generateConfig(name))
    })
    webpack(config, (err, stats) => {
      if (err) {
        console.error(err.stack || err)
        if (err.details) {
          console.error(err.details)
        }
        return
      }
      const info = stats.toJson()
      if (stats.hasErrors()) {
        console.error(info.errors)
      }
      if (stats.hasWarnings()) {
        console.warn(info.warnings)
      }
      console.log(stats)
    })
  })