In this example, dotnet is the root command, and publish is the executed subcommand. Using the dotnet CLI as an example: > dotnet publish When running a CLI application, only a single command executes. The very top-level command, the name of your executable (also referred to as arg0), is the root command. Key Terms to Understand the System.CommandLine APIĬommand: A command is an action or verb that the command-line app performs. Though there is quite a lot of information in the specification, three key terms help clarify the System.CommandLine API. Among other things, POSIX defines the syntax for command-line applications. Underlying many command-line interfaces is the Portable Operating System Interface (POSIX). Providing a universal experience can be quite difficult as many users are familiar with a mix of Bash, batch scripting, PowerShell, and others. System.CommandLine strives to ensure the parsing of the command line is consistent and provides both a good developer experience and a good end-user experience.
#Iconsole bai install#
You need to install pre-release NuGet packages because the library is still in beta. As of writing this article, the latest version posted on is 2.0.0-beta3.22114.1 (posted on Feb 18 th, 2022). It is worth mentioning that the public API of the project has been under constant development and improvement. It is an amazing library with many features, including tab completion and trim compatibility, while still being very performant. With the Beta 3 release and the official documentation now added, the library is getting much closer to the full General Availability (GA) release. I have had the privilege of working on the System.CommandLine library for the last several years. It is possible to invoke apps from the command line, but many apps do not leverage this interface. It took me a while to wrap my head around Jon’s statement, but the longer I have thought about it, the more I agree. "All apps are command-line apps" – Jon Sequeria, Principle Software Engineer on System.CommandLine. Overviewing the System.CommandLine Library
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