read raw piped data into cli application

To read raw piped data into a CLI application, you can leverage the Swift ArgumentParser library to handle command-line arguments and input. Here’s a brief overview of how you might approach this:

1. Define Your Command: Create a struct conforming to ParsableCommand to define your CLI command.
2. Handle Input: Use the stdin to read raw piped data.
3. Process Data: Implement the logic to process the input data as needed.

Here’s a simple example:

import ArgumentParser

struct MyCLI: ParsableCommand {
    @Argument(help: "The name of the user.")
    var username: String

    func run() throws {
        // Read from stdin
        let inputData = FileHandle.standardInput.readDataToEndOfFile()
        if let inputString = String(data: inputData, encoding: .utf8) {
            // Process the input data
            print("Received input: \(inputString)")
        } else {
            print("Failed to read input")
        }
    }
}

MyCLI.main()

This example sets up a basic CLI tool that reads raw data from standard input and prints it. You can expand this to include more complex processing as needed.

For more detailed information on building CLI tools with Swift, you might find the session A Swift Tour: Explore Swift’s features and design useful, particularly the section on argument parsing and command-line tools.

Additionally, if you are working with server-side Swift, the session Explore the Swift on Server ecosystem covers building services and handling inputs, which might provide further insights.