712 lines
26 KiB
C#
712 lines
26 KiB
C#
#nullable enable
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Reflection;
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using System.Text;
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using System.Text.Json;
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using MediaBrowser.Common;
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using MediaBrowser.Common.Extensions;
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using MediaBrowser.Common.Json;
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using MediaBrowser.Common.Plugins;
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using MediaBrowser.Model.Configuration;
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using MediaBrowser.Model.Plugins;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Logging;
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namespace Emby.Server.Implementations
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{
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/// <summary>
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/// Defines the <see cref="PluginManager" />.
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/// </summary>
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public class PluginManager : IPluginManager
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{
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private readonly string _pluginsPath;
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private readonly Version _appVersion;
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private readonly JsonSerializerOptions _jsonOptions;
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private readonly ILogger<PluginManager> _logger;
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private readonly IApplicationHost _appHost;
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private readonly ServerConfiguration _config;
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private readonly IList<LocalPlugin> _plugins;
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private readonly Version _nextVersion;
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private readonly Version _minimumVersion;
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/// <summary>
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/// Initializes a new instance of the <see cref="PluginManager"/> class.
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/// </summary>
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/// <param name="loggerfactory">The <see cref="ILoggerFactory"/>.</param>
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/// <param name="appHost">The <see cref="IApplicationHost"/>.</param>
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/// <param name="config">The <see cref="ServerConfiguration"/>.</param>
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/// <param name="pluginsPath">The plugin path.</param>
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/// <param name="imagesPath">The image cache path.</param>
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/// <param name="appVersion">The application version.</param>
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public PluginManager(
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ILoggerFactory loggerfactory,
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IApplicationHost appHost,
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ServerConfiguration config,
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string pluginsPath,
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string imagesPath,
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Version appVersion)
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{
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_logger = loggerfactory.CreateLogger<PluginManager>();
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_pluginsPath = pluginsPath;
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_appVersion = appVersion ?? throw new ArgumentNullException(nameof(appVersion));
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_jsonOptions = JsonDefaults.GetCamelCaseOptions();
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_config = config;
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_appHost = appHost;
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_imagesPath = imagesPath;
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_nextVersion = new Version(_appVersion.Major, _appVersion.Minor + 2, _appVersion.Build, _appVersion.Revision);
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_minimumVersion = new Version(0, 0, 0, 1);
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_plugins = Directory.Exists(_pluginsPath) ? DiscoverPlugins().ToList() : new List<LocalPlugin>();
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}
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/// <summary>
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/// Gets the Plugins.
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/// </summary>
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public IList<LocalPlugin> Plugins => _plugins;
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/// <summary>
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/// Returns all the assemblies.
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/// </summary>
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/// <returns>An IEnumerable{Assembly}.</returns>
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public IEnumerable<Assembly> LoadAssemblies()
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{
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// Attempt to remove any deleted plugins and change any successors to be active.
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for (int a = _plugins.Count - 1; a >= 0; a--)
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{
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var plugin = _plugins[a];
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if (plugin.Manifest.Status == PluginStatus.Deleted && DeletePlugin(plugin))
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{
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UpdateSuccessors(plugin);
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}
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}
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// Now load the assemblies..
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foreach (var plugin in _plugins)
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{
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CheckIfStillSuperceded(plugin);
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if (plugin.IsEnabledAndSupported == false)
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{
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_logger.LogInformation("Skipping disabled plugin {Version} of {Name} ", plugin.Version, plugin.Name);
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continue;
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}
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foreach (var file in plugin.DllFiles)
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{
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Assembly assembly;
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try
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{
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assembly = Assembly.LoadFrom(file);
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}
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catch (FileLoadException ex)
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{
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_logger.LogError(ex, "Failed to load assembly {Path}. Disabling plugin.", file);
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ChangePluginState(plugin, PluginStatus.Malfunctioned);
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continue;
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}
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_logger.LogInformation("Loaded assembly {Assembly} from {Path}", assembly.FullName, file);
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yield return assembly;
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}
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}
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}
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/// <summary>
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/// Creates all the plugin instances.
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/// </summary>
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public void CreatePlugins()
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{
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var createdPlugins = _appHost.GetExports<IPlugin>(CreatePluginInstance)
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.Where(i => i != null)
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.ToArray();
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}
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/// <summary>
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/// Registers the plugin's services with the DI.
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/// Note: DI is not yet instantiated yet.
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/// </summary>
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/// <param name="serviceCollection">A <see cref="ServiceCollection"/> instance.</param>
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public void RegisterServices(IServiceCollection serviceCollection)
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{
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foreach (var pluginServiceRegistrator in _appHost.GetExportTypes<IPluginServiceRegistrator>())
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{
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var plugin = GetPluginByType(pluginServiceRegistrator.Assembly.GetType());
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if (plugin == null)
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{
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_logger.LogError("Unable to find plugin in assembly {Assembly}", pluginServiceRegistrator.Assembly.FullName);
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continue;
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}
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CheckIfStillSuperceded(plugin);
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if (!plugin.IsEnabledAndSupported)
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{
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continue;
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}
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try
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{
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var instance = (IPluginServiceRegistrator?)Activator.CreateInstance(pluginServiceRegistrator);
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instance?.RegisterServices(serviceCollection);
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}
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#pragma warning disable CA1031 // Do not catch general exception types
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catch (Exception ex)
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#pragma warning restore CA1031 // Do not catch general exception types
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{
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_logger.LogError(ex, "Error registering plugin services from {Assembly}.", pluginServiceRegistrator.Assembly.FullName);
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if (ChangePluginState(plugin, PluginStatus.Malfunctioned))
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{
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_logger.LogInformation("Disabling plugin {Path}", plugin.Path);
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}
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}
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}
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}
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/// <summary>
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/// Imports a plugin manifest from <paramref name="folder"/>.
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/// </summary>
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/// <param name="folder">Folder of the plugin.</param>
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public void ImportPluginFrom(string folder)
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{
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if (string.IsNullOrEmpty(folder))
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{
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throw new ArgumentNullException(nameof(folder));
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}
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// Load the plugin.
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var plugin = LoadManifest(folder);
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// Make sure we haven't already loaded this.
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if (plugin == null || _plugins.Any(p => p.Manifest.Equals(plugin.Manifest)))
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{
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return;
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}
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_plugins.Add(plugin);
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EnablePlugin(plugin);
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}
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/// <summary>
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/// Removes the plugin reference '<paramref name="plugin"/>.
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/// </summary>
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/// <param name="plugin">The plugin.</param>
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/// <returns>Outcome of the operation.</returns>
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public bool RemovePlugin(LocalPlugin plugin)
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{
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if (plugin == null)
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{
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throw new ArgumentNullException(nameof(plugin));
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}
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if (DeletePlugin(plugin))
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{
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return true;
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}
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_logger.LogWarning("Unable to delete {Path}, so marking as deleteOnStartup.", plugin.Path);
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// Unable to delete, so disable.
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return ChangePluginState(plugin, PluginStatus.Deleted);
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}
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/// <summary>
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/// Attempts to find the plugin with and id of <paramref name="id"/>.
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/// </summary>
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/// <param name="id">The <see cref="Guid"/> of plugin.</param>
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/// <param name="version">Optional <see cref="Version"/> of the plugin to locate.</param>
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/// <returns>A <see cref="LocalPlugin"/> if located, or null if not.</returns>
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public LocalPlugin? GetPlugin(Guid id, Version? version = null)
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{
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LocalPlugin? plugin;
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if (version == null)
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{
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// If no version is given, return the current instance.
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var plugins = _plugins.Where(p => p.Id.Equals(id));
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plugin = plugins.FirstOrDefault(p => p.Instance != null);
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if (plugin == null)
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{
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plugin = plugins.OrderByDescending(p => p.Version).FirstOrDefault();
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}
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}
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else
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{
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// Match id and version number.
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plugin = _plugins.FirstOrDefault(p => p.Id.Equals(id) && p.Version.Equals(version));
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}
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return plugin;
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}
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/// <summary>
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/// Enables the plugin, disabling all other versions.
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/// </summary>
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/// <param name="plugin">The <see cref="LocalPlugin"/> of the plug to disable.</param>
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public void EnablePlugin(LocalPlugin plugin)
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{
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if (plugin == null)
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{
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throw new ArgumentNullException(nameof(plugin));
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}
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if (ChangePluginState(plugin, PluginStatus.Active))
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{
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UpdateSuccessors(plugin);
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}
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}
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/// <summary>
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/// Disable the plugin.
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/// </summary>
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/// <param name="plugin">The <see cref="LocalPlugin"/> of the plug to disable.</param>
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public void DisablePlugin(LocalPlugin plugin)
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{
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if (plugin == null)
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{
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throw new ArgumentNullException(nameof(plugin));
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}
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// Update the manifest on disk
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if (ChangePluginState(plugin, PluginStatus.Disabled))
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{
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UpdateSuccessors(plugin);
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}
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}
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private void CopyFiles(string source, string destination, bool overwrite, string searchPattern)
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{
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FileInfo[] files;
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try
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{
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files = new DirectoryInfo(source).GetFiles(searchPattern);
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}
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catch (Exception ex)
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{
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_logger.LogDebug(ex, "Error retrieving file list.");
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return;
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}
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foreach (FileInfo file in files)
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{
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try
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{
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file.CopyTo(Path.Combine(destination, file.Name), overwrite);
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}
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catch (Exception ex)
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{
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_logger.LogDebug(ex, "Error copying file {Name}", file.Name);
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}
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}
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}
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/// <summary>
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/// Changes the status of the other versions of the plugin to "Superceded".
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/// </summary>
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/// <param name="plugin">The <see cref="LocalPlugin"/> that's master.</param>
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private void UpdateSuccessors(LocalPlugin plugin)
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{
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// This value is memory only - so that the web will show restart required.
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plugin.Manifest.Status = PluginStatus.Restart;
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// Detect whether there is another version of this plugin that needs disabling.
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var predecessor = _plugins.OrderByDescending(p => p.Version)
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.FirstOrDefault(
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p => p.Id.Equals(plugin.Id)
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&& p.IsEnabledAndSupported
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&& p.Version != plugin.Version);
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if (predecessor == null)
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{
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return;
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}
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// migrate settings across from the last active version if they don't exist.
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CopyFiles(predecessor.Path, plugin.Path, false, "*.xml");
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if (predecessor.Manifest.Status == PluginStatus.Active && !ChangePluginState(predecessor, PluginStatus.Superceded))
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{
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_logger.LogError("Unable to disable version {Version} of {Name}", predecessor.Version, predecessor.Name);
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}
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}
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/// <summary>
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/// Disable the plugin.
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/// </summary>
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/// <param name="assembly">The <see cref="Assembly"/> of the plug to disable.</param>
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public void FailPlugin(Assembly assembly)
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{
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// Only save if disabled.
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if (assembly == null)
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{
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throw new ArgumentNullException(nameof(assembly));
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}
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var plugin = _plugins.Where(p => p.DllFiles.Contains(assembly.Location)).FirstOrDefault();
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if (plugin == null)
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{
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// A plugin's assembly didn't cause this issue, so ignore it.
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return;
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}
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ChangePluginState(plugin, PluginStatus.Malfunctioned);
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}
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/// <summary>
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/// Saves the manifest back to disk.
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/// </summary>
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/// <param name="manifest">The <see cref="PluginManifest"/> to save.</param>
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/// <param name="path">The path where to save the manifest.</param>
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/// <returns>True if successful.</returns>
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public bool SaveManifest(PluginManifest manifest, string path)
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{
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if (manifest == null)
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{
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return false;
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}
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try
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{
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var data = JsonSerializer.Serialize(manifest, _jsonOptions);
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File.WriteAllText(Path.Combine(path, "meta.json"), data, Encoding.UTF8);
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return true;
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}
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#pragma warning disable CA1031 // Do not catch general exception types
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catch (Exception e)
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#pragma warning restore CA1031 // Do not catch general exception types
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{
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_logger.LogWarning(e, "Unable to save plugin manifest. {Path}", path);
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return false;
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}
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}
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/// <summary>
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/// Changes a plugin's load status.
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/// </summary>
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/// <param name="plugin">The <see cref="LocalPlugin"/> instance.</param>
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/// <param name="state">The <see cref="PluginStatus"/> of the plugin.</param>
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/// <returns>Success of the task.</returns>
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private bool ChangePluginState(LocalPlugin plugin, PluginStatus state)
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{
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if (plugin.Manifest.Status == state || string.IsNullOrEmpty(plugin.Path))
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{
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// No need to save as the state hasn't changed.
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return true;
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}
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plugin.Manifest.Status = state;
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return SaveManifest(plugin.Manifest, plugin.Path);
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}
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/// <summary>
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/// Finds the plugin record using the type.
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/// </summary>
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/// <param name="type">The <see cref="Type"/> being sought.</param>
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/// <returns>The matching record, or null if not found.</returns>
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private LocalPlugin? GetPluginByType(Type type)
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{
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// Find which plugin it is by the path.
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return _plugins.FirstOrDefault(p => string.Equals(p.Path, Path.GetDirectoryName(type.Assembly.Location), StringComparison.Ordinal));
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}
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/// <summary>
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/// Creates the instance safe.
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/// </summary>
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/// <param name="type">The type.</param>
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/// <returns>System.Object.</returns>
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private object? CreatePluginInstance(Type type)
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{
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// Find the record for this plugin.
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var plugin = GetPluginByType(type);
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if (plugin?.Manifest.Status < PluginStatus.Active)
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{
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return null;
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}
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try
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{
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_logger.LogDebug("Creating instance of {Type}", type);
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var instance = (IPlugin)ActivatorUtilities.CreateInstance(_appHost.ServiceProvider, type);
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if (plugin == null)
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{
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// Create a dummy record for the providers.
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plugin = new LocalPlugin(
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pInstance.AssemblyFilePath,
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true,
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new PluginManifest
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{
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Guid = pInstance.Id,
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Status = PluginStatus.Active,
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Name = pInstance.Name,
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Version = pInstance.Version.ToString(),
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MaxAbi = _nextVersion.ToString()
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})
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{
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Instance = pInstance
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};
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_plugins.Add(plugin);
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plugin.Manifest.Status = PluginStatus.Active;
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}
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else
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{
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plugin.Instance = (IPlugin)instance;
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var manifest = plugin.Manifest;
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var pluginStr = plugin.Instance.Version.ToString();
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bool changed = false;
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if (string.Equals(manifest.Version, pluginStr, StringComparison.Ordinal))
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{
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// If a plugin without a manifest failed to load due to an external issue (eg config),
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// this updates the manifest to the actual plugin values.
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manifest.Version = pluginStr;
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manifest.Name = plugin.Instance.Name;
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manifest.Description = plugin.Instance.Description;
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changed = true;
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}
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changed = changed || manifest.Status != PluginStatus.Active;
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manifest.Status = PluginStatus.Active;
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if (changed)
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{
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SaveManifest(manifest, plugin.Path);
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}
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}
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_logger.LogInformation("Loaded plugin: {PluginName} {PluginVersion}", plugin.Name, plugin.Version);
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return instance;
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}
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#pragma warning disable CA1031 // Do not catch general exception types
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catch (Exception ex)
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#pragma warning restore CA1031 // Do not catch general exception types
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{
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_logger.LogError(ex, "Error creating {Type}", type.FullName);
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if (plugin != null)
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{
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if (ChangePluginState(plugin, PluginStatus.Malfunctioned))
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{
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_logger.LogInformation("Plugin {Path} has been disabled.", plugin.Path);
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return null;
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}
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}
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_logger.LogDebug("Unable to auto-disable.");
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return null;
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}
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}
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private void CheckIfStillSuperceded(LocalPlugin plugin)
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{
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if (plugin.Manifest.Status != PluginStatus.Superceded)
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{
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return;
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}
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var predecessor = _plugins.OrderByDescending(p => p.Version)
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.FirstOrDefault(p => p.Id.Equals(plugin.Id) && p.IsEnabledAndSupported && p.Version != plugin.Version);
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if (predecessor != null)
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{
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return;
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}
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plugin.Manifest.Status = PluginStatus.Active;
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}
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/// <summary>
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/// Attempts to delete a plugin.
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/// </summary>
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/// <param name="plugin">A <see cref="LocalPlugin"/> instance to delete.</param>
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/// <returns>True if successful.</returns>
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private bool DeletePlugin(LocalPlugin plugin)
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{
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// Attempt a cleanup of old folders.
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try
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{
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Directory.Delete(plugin.Path, true);
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_logger.LogDebug("Deleted {Path}", plugin.Path);
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_plugins.Remove(plugin);
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}
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#pragma warning disable CA1031 // Do not catch general exception types
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catch
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#pragma warning restore CA1031 // Do not catch general exception types
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{
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return false;
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}
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return _plugins.Remove(plugin);
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}
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private LocalPlugin? LoadManifest(string dir)
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{
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try
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{
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Version? version;
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PluginManifest? manifest = null;
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var metafile = Path.Combine(dir, "meta.json");
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if (File.Exists(metafile))
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{
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try
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{
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var data = File.ReadAllText(metafile, Encoding.UTF8);
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manifest = JsonSerializer.Deserialize<PluginManifest>(data, _jsonOptions);
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}
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#pragma warning disable CA1031 // Do not catch general exception types
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catch (Exception ex)
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#pragma warning restore CA1031 // Do not catch general exception types
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{
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_logger.LogError(ex, "Error deserializing {Path}.", dir);
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}
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}
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|
|
if (manifest != null)
|
|
{
|
|
if (!Version.TryParse(manifest.TargetAbi, out var targetAbi))
|
|
{
|
|
targetAbi = _minimumVersion;
|
|
}
|
|
|
|
if (!Version.TryParse(manifest.MaxAbi, out var maxAbi))
|
|
{
|
|
maxAbi = _appVersion;
|
|
}
|
|
|
|
if (!Version.TryParse(manifest.Version, out version))
|
|
{
|
|
manifest.Version = _minimumVersion.ToString();
|
|
}
|
|
|
|
return new LocalPlugin(dir, _appVersion >= targetAbi && _appVersion <= maxAbi, manifest);
|
|
}
|
|
|
|
// No metafile, so lets see if the folder is versioned.
|
|
// TODO: Phase this support out in future versions.
|
|
metafile = dir.Split(Path.DirectorySeparatorChar, StringSplitOptions.RemoveEmptyEntries)[^1];
|
|
int versionIndex = dir.LastIndexOf('_');
|
|
if (versionIndex != -1)
|
|
{
|
|
// Get the version number from the filename if possible.
|
|
metafile = Path.GetFileName(dir[..versionIndex]) ?? dir[..versionIndex];
|
|
version = Version.TryParse(dir.AsSpan()[(versionIndex + 1)..], out Version? parsedVersion) ? parsedVersion : _appVersion;
|
|
}
|
|
else
|
|
{
|
|
// Un-versioned folder - Add it under the path name and version it suitable for this instance.
|
|
version = _appVersion;
|
|
}
|
|
|
|
// Auto-create a plugin manifest, so we can disable it, if it fails to load.
|
|
manifest = new PluginManifest
|
|
{
|
|
Status = PluginStatus.Restart,
|
|
Name = metafile,
|
|
AutoUpdate = false,
|
|
Guid = metafile.GetMD5(),
|
|
TargetAbi = _appVersion.ToString(),
|
|
Version = version.ToString()
|
|
};
|
|
|
|
return new LocalPlugin(dir, true, manifest);
|
|
}
|
|
#pragma warning disable CA1031 // Do not catch general exception types
|
|
catch (Exception ex)
|
|
#pragma warning restore CA1031 // Do not catch general exception types
|
|
{
|
|
_logger.LogError(ex, "Something went wrong!");
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the list of local plugins.
|
|
/// </summary>
|
|
/// <returns>Enumerable of local plugins.</returns>
|
|
private IEnumerable<LocalPlugin> DiscoverPlugins()
|
|
{
|
|
var versions = new List<LocalPlugin>();
|
|
|
|
if (!Directory.Exists(_pluginsPath))
|
|
{
|
|
// Plugin path doesn't exist, don't try to enumerate sub-folders.
|
|
return Enumerable.Empty<LocalPlugin>();
|
|
}
|
|
|
|
var directories = Directory.EnumerateDirectories(_pluginsPath, "*.*", SearchOption.TopDirectoryOnly);
|
|
LocalPlugin? entry;
|
|
foreach (var dir in directories)
|
|
{
|
|
entry = LoadManifest(dir);
|
|
if (entry != null)
|
|
{
|
|
versions.Add(entry);
|
|
}
|
|
}
|
|
|
|
string lastName = string.Empty;
|
|
versions.Sort(LocalPlugin.Compare);
|
|
// Traverse backwards through the list.
|
|
// The first item will be the latest version.
|
|
for (int x = versions.Count - 1; x >= 0; x--)
|
|
{
|
|
entry = versions[x];
|
|
if (!string.Equals(lastName, entry.Name, StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
entry.DllFiles.AddRange(Directory.EnumerateFiles(entry.Path, "*.dll", SearchOption.AllDirectories));
|
|
if (entry.IsEnabledAndSupported)
|
|
{
|
|
lastName = entry.Name;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (string.IsNullOrEmpty(lastName))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
var manifest = entry.Manifest;
|
|
var cleaned = false;
|
|
var path = entry.Path;
|
|
if (_config.RemoveOldPlugins)
|
|
{
|
|
// Attempt a cleanup of old folders.
|
|
try
|
|
{
|
|
_logger.LogDebug("Deleting {Path}", path);
|
|
Directory.Delete(path, true);
|
|
cleaned = true;
|
|
}
|
|
#pragma warning disable CA1031 // Do not catch general exception types
|
|
catch (Exception e)
|
|
#pragma warning restore CA1031 // Do not catch general exception types
|
|
{
|
|
_logger.LogWarning(e, "Unable to delete {Path}", path);
|
|
}
|
|
|
|
if (cleaned)
|
|
{
|
|
versions.RemoveAt(x);
|
|
}
|
|
else
|
|
{
|
|
if (manifest == null)
|
|
{
|
|
_logger.LogWarning("Unable to disable plugin {Path}", entry.Path);
|
|
continue;
|
|
}
|
|
|
|
if (manifest.Status != PluginStatus.Deleted)
|
|
{
|
|
manifest.Status = PluginStatus.Deleted;
|
|
SaveManifest(manifest, entry.Path);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Only want plugin folders which have files.
|
|
return versions.Where(p => p.DllFiles.Count != 0);
|
|
}
|
|
}
|
|
}
|