How do I pipe input to a swift cli
Asked on 07/30/2024
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To pipe input to a Swift CLI, you can use standard input (stdin) in your Swift program. Here's a basic example of how you can achieve this:
- Create a Swift CLI Program: First, create a Swift file, for example,
main.swift.
import Foundation
// Read from standard input
if let input = readLine() {
print("Received input: \(input)")
} else {
print("No input received")
}
- Compile the Swift Program: Use the Swift compiler to compile your program.
swiftc main.swift -o mycli
- Run the Swift CLI Program with Piped Input: You can then run your compiled program and pipe input to it.
echo "Hello, Swift CLI!" | ./mycli
This will output:
Received input: Hello, Swift CLI!
For more detailed examples and advanced usage, 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 features like ArgumentParser.
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