appium/postinstall.js

#!/usr/bin/env node
/* eslint-disable no-console, promise/prefer-await-to-then */

async function main () {
  const driverEnv = process.env.npm_config_drivers;
  const pluginEnv = process.env.npm_config_plugins;

  if (!driverEnv && !pluginEnv) {
    console.log('Not auto-installing any drivers or plugins');
    return;
  }

  let extension;
  try {
    extension = require('./build/lib/cli/extension');
  } catch (e) {
    throw new Error(`Could not load extension CLI file; has the project been transpiled? ` +
                    `(${e.message})`);
  }

  const {DEFAULT_APPIUM_HOME, DRIVER_TYPE, PLUGIN_TYPE} = require('./build/lib/extension-config');
  const {runExtensionCommand} = extension;
  const appiumHome = process.env.npm_config_appium_home || DEFAULT_APPIUM_HOME;
  const specs = [[DRIVER_TYPE, driverEnv], [PLUGIN_TYPE, pluginEnv]];

  for (const [type, extEnv] of specs) {
    if (extEnv) {
      for (const ext of extEnv.split(',')) {
        try {
          await checkAndInstallExtension({runExtensionCommand, appiumHome, type, ext});
        } catch (e) {
          console.log(`There was an error checking and installing ${type} ${ext}: ${e.message}`);
        }
      }
    }
  }
}

async function checkAndInstallExtension ({
  runExtensionCommand,
  appiumHome,
  type,
  ext,
}) {
  const extList = await runExtensionCommand({
    appiumHome,
    [`${type}Command`]: 'list',
    showInstalled: true,
    suppressOutput: true,
  }, type);
  if (extList[ext]) {
    console.log(`The ${type} ${ext} was already installed, skipping...`);
    return;
  }
  console.log(`Installing the ${type} ${ext}...`);
  await runExtensionCommand({
    appiumHome,
    [`${type}Command`]: 'install',
    [type]: ext,
    suppressOutput: true,
  }, type);
}

if (require.main === module) {
  main().then(() => {
    process.exit(0);
  }).catch((e) => {
    console.error(e);
    process.exit(1);
  });
}