args.go

package main

// Defines the command line parsing function and global variables

import (
	"flag"
	"fmt"
	"os"
)

var gArgLogPath string
var gArgAuditPath string
var gArgAuditBoth bool
var gArgLogBoth bool
var gArgNoAuditBool bool

var gArgConfigPath string
var gArgPACPath string

var gArgQuietBool bool
var gArgVerboseBool bool

func cmdlineError(a ...interface{}) {
	fmt.Fprintln(os.Stderr, a...)
	os.Exit(1)
}

// parseArgs parses the command line arguments, performs some checks, and store them in the associated global variables
func parseArgs() {
	flag.BoolVar(&gArgQuietBool, "q", false, "Quiet mode")
	flag.BoolVar(&gArgVerboseBool, "v", false, "Verbose mode")
	flag.StringVar(&gArgAuditPath, "audit-file", "", "File to output audit traces. Output to STDOUT if empty")
	flag.BoolVar(&gArgAuditBoth, "audit-both", false, "Output audit traces to both -audit-file and STDOUT.")
	flag.StringVar(&gArgLogPath, "log-file", "", "File to output logs. Output to STDOUT if empty")
	flag.BoolVar(&gArgLogBoth, "log-both", false, "Output logs to both -log-file and STDOUT.")
	flag.StringVar(&gArgConfigPath, "c", "./bbs.json", "JSON configuration file path")
	flag.BoolVar(&gArgNoAuditBool, "no-audit", false, "No audit traces mode")
	if gPACcompiled {
		flag.StringVar(&gArgPACPath, "pac", "", "PAC script file path")
	}

	flag.Parse()

	if gArgQuietBool && gArgVerboseBool {
		cmdlineError("Arguments -q and -v cannot be used together")
	}

	if gArgAuditBoth && gArgAuditPath == "" {
		cmdlineError("-audit-file must be defined if -audit-both is set")
	}

	if gArgLogBoth && gArgLogPath == "" {
		cmdlineError("-log-file must be defined if -log-both is set")
	}

	if (gArgNoAuditBool && gArgAuditBoth) || (gArgNoAuditBool && gArgAuditPath != "") {
		cmdlineError("Arguments -no-audit and -audit-file/-audit-both cannot be used together")
	}

}