Function getAllAddonsByNameWithinHost

tests/helpers/per-bundle-addon-cache.js:19–48

* This collects all addons by name within a given host; it stops traversing when it * encounters another host (i.e., a lazy engine). Within a given host we should expect * at most 1 real addon, otherwise this is an error condition. We otherwise add all * proxies to `config.proxies` * * @name ge

(projectOrAddon, addonName, config = { proxies: [] })

 * @returns {{proxies: Proxy[], realAddon: Addon}}
 */
function getAllAddonsByNameWithinHost(projectOrAddon, addonName, config = { proxies: [] }) {
  if (!config.originalHost) {
    config.originalHost = projectOrAddon;
  }

  projectOrAddon.addons.forEach((addon) => {
    if (addon.name === addonName) {
      if (config.realAddon && !addon[TARGET_INSTANCE]) {
        throw new Error(
          `The real addon (\`${addon.name}\`) has already been set for a given host (\`${
            typeof config.originalHost.name === 'function' ? config.originalHost.name() : config.originalHost.name
          }\`); the proxy for addon caching is not working correctly`
        );
      }

      if (addon[TARGET_INSTANCE]) {
        config.proxies.push(addon);
      } else {
        config.realAddon = addon;
      }
    }

    // stop traversing within another host
    if (!isLazyEngine(addon)) {
      getAllAddonsByNameWithinHost(addon, addonName, config);
    }
  });

  return config;
}

/**
 * Returns whether all instances within a given host are equal (i.e., that there's a single