ecal/cli/ecal.go

/*
 * ECAL
 *
 * Copyright 2020 Matthias Ladkau. All rights reserved.
 *
 * This Source Code Form is subject to the terms of the MIT
 * License, If a copy of the MIT License was not distributed with this
 * file, You can obtain one at https://opensource.org/licenses/MIT.
 */

package main

import (
	"flag"
	"fmt"
	"os"

	"devt.de/krotik/ecal/cli/tool"
	"devt.de/krotik/ecal/config"
)

/*
TODO:
- create executable binary (pack into single binary)
- debug server support (vscode)
- pretty printer
*/

func main() {

	// Initialize the default command line parser

	flag.CommandLine.Init(os.Args[0], flag.ContinueOnError)

	// Define default usage message

	flag.Usage = func() {

		// Print usage for tool selection

		fmt.Println(fmt.Sprintf("Usage of %s <tool>", os.Args[0]))
		fmt.Println()
		fmt.Println(fmt.Sprintf("ECAL %v - Event Condition Action Language", config.ProductVersion))
		fmt.Println()
		fmt.Println("Available commands:")
		fmt.Println()
		fmt.Println("    console   Interactive console (default)")
		fmt.Println("    run       Execute ECAL code")
		fmt.Println("    debug     Run in debug mode")
		fmt.Println("    pack      Create a single executable from ECAL code")
		fmt.Println()
		fmt.Println(fmt.Sprintf("Use %s <command> -help for more information about a given command.", os.Args[0]))
		fmt.Println()
	}

	// Parse the command bit

	if err := flag.CommandLine.Parse(os.Args[1:]); err == nil {
		interpreter := tool.NewCLIInterpreter()

		if len(flag.Args()) > 0 {

			arg := flag.Args()[0]

			if arg == "console" {
				err = interpreter.Interpret(true)
			} else if arg == "run" {
				err = interpreter.Interpret(false)
			} else if arg == "debug" {
				debugInterpreter := tool.NewCLIDebugInterpreter(interpreter)
				err = debugInterpreter.Interpret()
			} else {
				flag.Usage()
			}

		} else if err == nil {

			err = interpreter.Interpret(true)
		}

		if err != nil {
			fmt.Println(fmt.Sprintf("Error: %v", err))
		}

	} else {
		flag.Usage()
	}
}