how can I make command line tool SPM package and use it within another app?

To create a command line tool as a Swift Package Manager (SPM) package and use it within another app, you can follow these general steps:

1. Create a Swift Package: Use the Swift Package Manager to create a new package. You can do this by running swift package init --type executable in your terminal. This will set up a basic structure for your command line tool.

2. Develop Your Command Line Tool: Implement the functionality of your command line tool within the package. You can organize your code into modules and add dependencies as needed. Swift Package Manager allows you to manage these dependencies easily.

3. Testing: You can write tests for your package using Swift's testing framework. Run your tests using swift test to ensure everything works as expected. Swift testing is integrated into major tools and IDEs, including Xcode and Visual Studio Code, as mentioned in the Meet Swift Testing session.

4. Use the Package in Another App: To use your command line tool package within another app, you can add it as a dependency in the app's Package.swift file. This allows you to integrate the functionality of your command line tool into your app.

5. Cross Compilation: If you need to run your command line tool on different platforms, you can use cross compilation. For example, you can develop on macOS and deploy to a Linux server using the static Linux SDK for Swift, as discussed in the What’s new in Swift session.

By following these steps, you can effectively create and integrate a command line tool as a Swift package into another application. If you need more detailed guidance, you might want to explore the sessions mentioned for specific topics like testing and cross-compilation.