added CLI helper base

src/lib/CLIAppBase.hx

@@ -0,0 +1,58 @@
+package lib;
+
+import kernel.ps.Process;
+import kernel.ps.ProcessHandle;
+
+using tink.CoreApi;
+
+abstract class CLIAppBase implements Process {
+	private var handle: ProcessHandle;
+
+	private final _subcommandsSync: Map<String, (Array<String>) -> Bool> = [];
+	private final _subcommandsAsync: Map<String, (Array<String>) -> Future<Bool>> = [];
+	private final _subcommandsSynopsis: Array<String> = [];
+
+	public function run(handle: ProcessHandle){
+		this.handle = handle;
+
+		var subcommand = handle.args[0];
+
+		if (subcommand == null || subcommand == "") {
+			handle.writeLine("No subcommand specified");
+			printHelp();
+			return handle.close(false);
+		}
+
+		var args = handle.args.slice(1);
+
+		if (_subcommandsSync.exists(subcommand)) {
+			var result = _subcommandsSync[subcommand](args);
+			return handle.close(result);
+		} else if (_subcommandsAsync.exists(subcommand)) {
+			_subcommandsAsync[subcommand](args).handle(handle.close);
+		} else {
+			handle.writeLine("Unknown subcommand: " + subcommand);
+			printHelp();
+			return handle.close(false);
+		}
+
+	}
+
+	private function registerSyncSubcommand(command: String, callback: (Array<String>) -> Bool, synopsis: String = null) {
+		_subcommandsSync.set(command, callback);
+		_subcommandsSynopsis.push(command + " " + synopsis);
+	}
+
+	private function registerAsyncSubcommand(command: String, callback: (Array<String>) -> Future<Bool>, synopsis: String = null) {
+		_subcommandsAsync.set(command, callback);
+		_subcommandsSynopsis.push(command + " " + synopsis);
+	}
+
+	private function printHelp() {
+		handle.writeLine("Usage: <subcommand> [args]");
+		handle.writeLine("Subcommands:");
+		for (subcommand in _subcommandsSynopsis) {
+			handle.writeLine("  " + subcommand);
+		}
+	}
+}