Update to swift-tools-version:5.5

Declare Deal command with @main attribute

Author: mattt

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version:5.3
+// swift-tools-version:5.5
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 /*
@@ -30,7 +30,7 @@ let package = Package(
     targets: [
         // Targets are the basic building blocks of a package. A target can define a module or a test suite.
         // Targets can depend on other targets in this package, and on products in packages which this package depends on.
-        .target(
+        .executableTarget(
             name: "dealer",
             dependencies: [
                 .product(name: "DeckOfPlayingCards",

Sources/dealer/main.swift renamed to Sources/dealer/Deal.swift

@@ -10,7 +10,6 @@
 
 #if os(Linux)
 import Glibc
-srandom(UInt32(clock()))
 #endif
 
 import Foundation
@@ -20,6 +19,7 @@ import ArgumentParser
 var stdout = FileHandle.standardOutput
 var stderr = FileHandle.standardError
 
+@main
 struct Deal: ParsableCommand {
     static var configuration = CommandConfiguration(
             abstract: "Shuffles a deck of playing cards and deals a number of cards.",
@@ -32,6 +32,10 @@ struct Deal: ParsableCommand {
     var count: UInt = 10
 
     mutating func run() throws {
+        #if os(Linux)
+        srandom(UInt32(clock()))
+        #endif
+
         var deck = Deck.standard52CardDeck()
         deck.shuffle()
 
@@ -45,5 +49,3 @@ struct Deal: ParsableCommand {
         }
     }
 }
-
-Deal.main()