README.md

Press any key to continue in Swift Command line

bash

https://unix.stackexchange.com/a/293941

read -n 1 -s -r -p "Press any key to continue"

Swift

print("Press any key to continue")
_ = getch()

getch.swift

// getch() equivalent in Swift: read a single character from stdin without a newline
// https://stackoverflow.com/a/59795707

extension FileHandle {
    func enableRawMode() -> termios {
        var raw = termios()
        tcgetattr(self.fileDescriptor, &raw)

        let original = raw
        raw.c_lflag &= ~UInt(ECHO | ICANON)
        tcsetattr(self.fileDescriptor, TCSADRAIN, &raw)
        return original
    }

    func restoreRawMode(originalTerm: termios) {
        var term = originalTerm
        tcsetattr(self.fileDescriptor, TCSADRAIN, &term)
    }
}

func getch() -> UInt8 {
    let handle = FileHandle.standardInput
    let term = handle.enableRawMode()
    defer { handle.restoreRawMode(originalTerm: term) }

    var byte: UInt8 = 0
    read(handle.fileDescriptor, &byte, 1)
    return byte
}