how do I pipe input to a swift cli application
Asked on 08/01/2024
1 search
To pipe input to a Swift CLI application, you can use standard input (stdin) in your Swift code. Here's a simple example of how you can read from stdin in a Swift CLI application:
import Foundation
// Read input from stdin
if let input = readLine() {
print("Received input: \(input)")
} else {
print("No input received")
}
You can compile this Swift code into a binary and then run it from the terminal, piping input to it. For example:
echo "Hello, Swift CLI!" | ./your-swift-cli-app
This will output:
Received input: Hello, Swift CLI!
For more detailed examples and context, you might want to check out the session A Swift Tour: Explore Swift’s features and design, which discusses building command-line tools in Swift and using argument parsers.
Go small with Embedded Swift
Embedded Swift brings the safety and expressivity of Swift to constrained environments. Explore how Embedded Swift runs on a variety of microcontrollers through a demonstration using an off-the-shelf Matter device. Learn how the Embedded Swift subset packs the benefits of Swift into a tiny footprint with no runtime, and discover plenty of resources to start your own Embedded Swift adventure.
What’s new in Swift
Join us for an update on Swift. We’ll briefly go through a history of Swift over the past decade, and show you how the community has grown through workgroups, expanded the package ecosystem, and increased platform support. We’ll introduce you to a new language mode that achieves data-race safety by default, and a language subset that lets you run Swift on highly constrained systems. We’ll also explore some language updates including noncopyable types, typed throws, and improved C++ interoperability.
Explore the Swift on Server ecosystem
Swift is a great language for writing your server applications, and powers critical services across Apple’s cloud products. We’ll explore tooling, delve into the Swift server package ecosystem, and demonstrate how to interact with databases and add observability to applications.