added some features

- Added `cron` command to run lists with `cron` time specifed
- Changed `-c` flag to `-f` flag for passing config file
- Modified some config keys
  - cmdArgs -> Args
  - Got rid of `hosts.config`
- better SSH handling
  - respects values in config file

pkg/logging/logging.go

@@ -3,8 +3,12 @@ package logging
 import (
 	"fmt"
 	"os"
+	"strings"
+	"time"
 
 	"github.com/rs/zerolog"
+	"github.com/spf13/viper"
+	"gopkg.in/natefinch/lumberjack.v2"
 )
 
 type Logging struct {
@@ -20,3 +24,54 @@ func ExitWithMSG(msg string, code int, log *zerolog.Logger) {
 	fmt.Printf("%s\n", msg)
 	os.Exit(code)
 }
+
+func SetLoggingWriters(v *viper.Viper, logFile string) (writers zerolog.LevelWriter) {
+
+	console := zerolog.ConsoleWriter{}
+	if IsConsoleLoggingEnabled() {
+
+		console = zerolog.ConsoleWriter{Out: os.Stdout, TimeFormat: time.RFC1123}
+		console.FormatLevel = func(i interface{}) string {
+			return strings.ToUpper(fmt.Sprintf("| %-6s|", i))
+		}
+		console.FormatMessage = func(i any) string {
+			if i == nil {
+				return ""
+			}
+			return fmt.Sprintf("MSG: %s", i)
+		}
+		console.FormatFieldName = func(i interface{}) string {
+			return fmt.Sprintf("%s: ", i)
+		}
+		console.FormatFieldValue = func(i interface{}) string {
+			return fmt.Sprintf("%s", i)
+			// return strings.ToUpper(fmt.Sprintf("%s", i))
+		}
+	}
+
+	fileLogger := &lumberjack.Logger{
+		MaxSize:    500, // megabytes
+		MaxBackups: 3,
+		MaxAge:     28,   //days
+		Compress:   true, // disabled by default
+	}
+	if strings.TrimSpace(logFile) != "" {
+		fileLogger.Filename = logFile
+	} else {
+		fileLogger.Filename = "./backy.log"
+	}
+
+	// UNIX Time is faster and smaller than most timestamps
+	zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
+	// zerolog.TimeFieldFormat = time.RFC1123
+	writers = zerolog.MultiLevelWriter(fileLogger)
+
+	if IsConsoleLoggingEnabled() {
+		writers = zerolog.MultiLevelWriter(console, fileLogger)
+	}
+	return
+}
+
+func IsConsoleLoggingEnabled() bool {
+	return os.Getenv("BACKY_CONSOLE_LOGGING") == "enabled"
+}