Disable default subcommand, enable version flag

.vscode/tasks.json

@@ -3,6 +3,16 @@
   // for the documentation about the tasks.json format
   "version": "2.0.0",
   "tasks": [
+    {
+      "label": "build and run",
+      "type": "shell",
+      "command": "swift build && cd TestApp && ../.build/debug/carton"
+    },
+    {
+      "label": "build and version",
+      "type": "shell",
+      "command": "swift build && cd TestApp && ../.build/debug/carton --version"
+    },
     {
       "label": "build and run dev",
       "type": "shell",

CHANGELOG.md

@@ -29,13 +29,13 @@ instead of Foundation's `URLSession` for dependency downloads.
 # 0.1.0 (16 June 2020)
 
 Since SwiftPM doesn't always build an executable target even if one is present without
-an explicit `--product` flag, the `dev` command now requires the presence of an executable
-target in your `Package.swift`. Use the new `--product` flag instead of `--target` to
+an explicit `--product` option, the `dev` command now requires the presence of an executable
+target in your `Package.swift`. Use the new `--product` option instead of `--target` to
 disambiguate between multiple executable targets.
 
 # 0.0.5 (16 June 2020)
 
-Pass `--target` flag to `swift build` when running the `dev` command.
+Pass `--target` option to `swift build` when running the `dev` command.
 
 # 0.0.4 (16 June 2020)
 

Sources/carton/Carton.swift

@@ -17,7 +17,7 @@ import ArgumentParser
 struct Carton: ParsableCommand {
   static var configuration = CommandConfiguration(
     abstract: "📦 Watcher, bundler, and test runner for your SwiftWasm apps.",
-    subcommands: [Dev.self, Test.self, Bundle.self],
-    defaultSubcommand: Dev.self
+    version: "0.1.5",
+    subcommands: [Dev.self, Test.self, Bundle.self]
   )
 }

Sources/carton/Commands/Dev.swift

@@ -61,7 +61,7 @@ struct Dev: ParsableCommand {
     try dependency.check(on: localFileSystem, terminal)
     let swiftPath = try localFileSystem.inferSwiftPath(terminal)
     guard let product = try Package(with: swiftPath, terminal)
-      .inferDevProduct(with: swiftPath, flag: product, terminal)
+      .inferDevProduct(with: swiftPath, option: product, terminal)
     else { return }
 
     let binPath = try localFileSystem.inferBinPath(swiftPath: swiftPath)

Sources/carton/Model/Package.swift

@@ -33,14 +33,14 @@ struct Package: Codable {
 
   func inferDevProduct(
     with swiftPath: String,
-    flag: String?,
+    option: String?,
     _ terminal: TerminalController
   ) -> String? {
     var candidateProducts = products
       .filter { $0.type.library == nil }
       .map(\.name)
 
-    if let product = flag {
+    if let product = option {
       candidateProducts = candidateProducts.filter { $0 == product }
 
       guard candidateProducts.count == 1 else {
@@ -59,7 +59,7 @@ struct Package: Codable {
       terminal.write("Failed to disambiguate the development product\n", inColor: .red)
 
       if candidateProducts.count > 1 {
-        terminal.write("Pass one of \(candidateProducts) to the --product flag\n", inColor: .red)
+        terminal.write("Pass one of \(candidateProducts) to the --product option\n", inColor: .red)
       } else {
         terminal.write(
           "Make sure there's at least one executable product in your Package.swift\n",