![]() Here’s how you can use this app to help troubleshoot issues with your Mac.īoth macOS itself and Mac apps create lots of logs: files with statements about what the apps have done, along with any errors. Console displays logs and error messages that, in some cases, can help you pin down the cause of your troubles. One of these is Console, located in your /Applications/Utilities folder. Troubleshooting computer problems can be quite complex, but fortunately there are some tools that are included with macOS that can help. NET.Software & Apps How to use the Console app for troubleshooting In this post, I showed how to use the NuGet package to parse command line arguments and how to use the generic host to get access to dependency injection, configuration, logging and other standard features of. If you need more functionality, you can always extend it to your liking. NET 6 console application template is great for simple cases. You can view the full source code for the sample application in my GitHub repository. It can be further configured using its ConfigureLogging extension method. The default ILogger is provided by the generic host.IConsole and CommandLineApplication are configured by the library and provide access to the Console class and the application entry point, respectively.You can see that several dependencies are injected that I have not configured: I did this because my application will end up supporting multiple commands. It would be better to include the functionality directly in the root command. ![]() With only a single subcommand, this does not make much sense. Var json = JsonSerializer.Serialize(config) The Subcommand attribute points to the second command class that implements the actual functionality: I chose the latter because I need them only in this method, so I can avoid a constructor and fields for the dependencies. In command classes, dependencies can be injected either in the constructor or in the OnExecute method. Logger.LogInformation( "OnExecute called.") Ĭonsole.WriteLine( "You must specify a subcommand.") ![]() However, when you use top-level statements, this class is automatically generated, so you need to create a separate class with the OnExecute method and the Command attribute that acts as the command: In the library documentation, this is usually the Program class. The AppCommand class is the root command. I learned this pattern from a book on design patterns by Carl-Hugo Marcotte. Public string Option1 = string.Empty Īfter configuring the options, I add the resulting configuration as a singleton so that I can inject the Config class directly instead of wrapped in one of the option interfaces. I call the ValidateDataAnnotations extension method to validate the configuration based on the attributes applied to the model class: internal class Config There are two details about the options configuration that are worth mentioning: When you add this file to the project, you need to include it as content in the build: Always In this case, I use it in combination with the options pattern to read the configuration from the appSettings.json file. Bind((nameof(Config)))Īs you can see in the code snippet above, I can use the generic host to configure services for dependency injection as we are used to from other templates. ConfigureServices((context, services) => Then you can change your Program.cs as follows: Host.CreateDefaultBuilder() For this, you need to install 2 more NuGet packages: and. There are other cross-cutting concerns that are well solved in other templates but are not available in the console application template, for example: dependency injection, logging, reading configuration files.įortunately, you can get them as well if you use the generic host. Parsing command-line arguments is probably not the only feature you need in a large console application. It's well documented and although none of the examples use top-level statements, they should not be too difficult to customize if you want to. There are several NuGet packages that already do this. You certainly do not want to write code yourself to parse command line arguments. That's great for simple applications, but what if you want to create a large console application with a sophisticated command-line interface? NET 6 is as minimal as possible thanks to top-level statements.
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