Seeing the tool in the above-mentioned list should make it more legitimate. Nevertheless, it would still be prudent to always check the package download numbers in NuGet gallery and any other packages published by the same author, before installing a global tool.
Most, if not all, global tools are open source, so you can also check their source code to be extra safe. The only prerequisite for using. NET Core global tools is having. If a global tool targets a newer version of. NET Core, you need to have a compatible version of the runtime installed. The management of global tools on the local machine is done using the dotnet tool command.
To install a global tool, its NuGet package name must be specified, e. The above command always installs the latest stable version of the package. If you want to install a specific version an older one or a prerelease one , you must explicitly specify the version:.
The install process puts the tool in a folder inside your profile the. The folder is automatically added to the PATH user environment variable.
This makes it specific to your user account on the machine, but available from any folder without having to specify the path to it. The name of the command does not necessarily match the name of the NuGet package although this is often the case.
The name of the command to invoke is printed out when you install it, e. You can always get a list of all the global tools installed and their corresponding commands by invoking the dotnet tool list command:. You can control the behavior of commands with command line arguments. Each command has its own set of supported arguments. You can usually list them if you invoke the command with the -h option, e.
The output should be enough for you to learn how to use a command. Some global tools have more detailed documentation published on their NuGet page or on their project site the NuGet package always includes a link to it. You can use the dotnet tool command to perform several other actions:. To install a different version not the latest stable one of an already installed global tool, you must uninstall it first, and then install the selected version, e. As already mentioned, global tools are.
NET Core console applications. Therefore, to create one, you need to select the Console App. You can use the dotnet new console command to create a suitable project from the command line.
Of course, you will want to affect the behavior of your global tool with command line arguments. If you need to support multiple subcommands, each with several options, argument parsing can quickly become a complex task.
To make your life easier, you should use a class library to handle that and focus on the core functionality of the global tool instead. A good choice would be CommandLineUtils class library which is used by many other global tools as well.
To use it, you need to install the McMaster. CommandLineUtils NuGet package in your project. You can then implement each subcommand as a separate class with a Command attribute. In the following example, the Print command will print out the contents of a file to the console:. Options are defined as properties with an Option attribute. Data annotation attributes can be used to implement value validation:.
The OnExecute method should contain the actual command. The injected instance of IConsole should be used to output text to console:. All supported subcommands must be declared with the Subcommand attribute of the Program class:. Since the Program class is also a command, it requires its own OnExecute method which will be invoked when no subcommand command line argument is specified.
This sample global tool will simply notify the user that a subcommand must be specified, and print out the help text:. Notice that this OnExecute method returns a non-zero return value which by convention indicates an error condition. The OnExecute methods with void return type are treated as if they always returned 0. This matches the behavior of the Main method in a console application. In the Main method, the input arguments must simply be relayed to the class library:.
For the global tool to return an exit code, the Main method must return the value returned by the CommandLineApplication. Execute static method which will match the return value of the OnExecute method invoked. With almost no plumbing code, we have created a fully functional command line tool. If we invoke it with no arguments, the autogenerated help text will be displayed:. This example is only a small part of what the CommandLineUtils class library can do for you in a console application.
To learn more, you should read the official documentation. To distribute the global tool and also to install it locally , it must be packed into a NuGet package. Unfortunately, Visual Studio does not yet have any user interface for setting the most important NuGet configuration option.
So to do that, the. To test the global tool before publishing it to the NuGet Gallery, you can use the --add-source option of the dotnet tool install command to instruct it with the location where the NuGet package with the global tool can be found:. Babel Obfuscator provides code obfuscation for any. NET technology. Runs on any platform that supports.
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