Function isPluginInstalled

src/utils/plugins/installedPluginsManager.ts:818–831

(pluginId: string)

 *   project. Returns false for plugins only installed in other projects.
 */
export function isPluginInstalled(pluginId: string): boolean {
  const v2Data = loadInstalledPluginsV2()
  const installations = v2Data.plugins[pluginId]
  if (!installations || installations.length === 0) {
    return false
  }
  if (!installations.some(isInstallationRelevantToCurrentProject)) {
    return false
  }
  // Plugins are loaded from settings.enabledPlugins
  // If settings.enabledPlugins and installed_plugins.json diverge
  // (via settings.json clobber), return false
  return getSettings_DEPRECATED().enabledPlugins?.[pluginId] !== undefined
}

/**
 * True only if the plugin has a USER or MANAGED scope installation.