Enable --version flag (#58)

* Enable --version flag

Currently, when invoking `gitbuddy --version` you don't get the current version printed. Fortunately, Swift Argument Parser automatically parses that flag if a version argument is provided to the `CommandConfiguration` initializer.

* Reuse VersionCommand.version value

* Remove VersionCommand

* Update Fastfile

Sources/GitBuddyCore/Commands/GitBuddy.swift

@@ -11,7 +11,14 @@ import ArgumentParser
 
 /// Entry class of GitBuddy that registers commands and handles execution.
 public struct GitBuddy: ParsableCommand {
-    public static let configuration = CommandConfiguration(commandName: "gitbuddy", abstract: "Manage your GitHub repositories with ease", subcommands: [ChangelogCommand.self, ReleaseCommand.self, VersionCommand.self])
+    public static let version = "3.0.1"
+
+    public static let configuration = CommandConfiguration(
+        commandName: "gitbuddy",
+        abstract: "Manage your GitHub repositories with ease",
+        version: Self.version,
+        subcommands: [ChangelogCommand.self, ReleaseCommand.self]
+    )
 
     public init() { }
 }

fastlane/Fastfile

@@ -23,8 +23,8 @@ desc "Updates the version number to match the releasing tag"
 lane :update_version do
 	tag_name = ENV["BITRISE_GIT_TAG"]
 
-	file_path = "../Sources/GitBuddyCore/Commands/VersionCommand.swift"
+	file_path = "../Sources/GitBuddyCore/Commands/GitBuddy.swift"
 	text = File.read(file_path)
 	new_contents = text.gsub(/[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}(\..*)?/, tag_name)
 	File.open(file_path, "w") {|file| file.puts new_contents }
-end
+end