unlock on error and named arrays for config

cmd/cron.go

@@ -17,6 +17,7 @@ package cmd
 
 import (
 	"github.com/cupcakearmy/autorestic/internal"
+	"github.com/cupcakearmy/autorestic/internal/lock"
 	"github.com/spf13/cobra"
 )
 
@@ -26,8 +27,12 @@ var cronCmd = &cobra.Command{
 	Short: "Run cron job for automated backups",
 	Long:  `Intended to be mainly triggered by an automated system like systemd or crontab. For each location checks if a cron backup is due and runs it.`,
 	Run: func(cmd *cobra.Command, args []string) {
-		err := internal.RunCron()
-		cobra.CheckErr(err)
+		err := lock.Lock()
+		CheckErr(err)
+		defer lock.Unlock()
+
+		err = internal.RunCron()
+		CheckErr(err)
 	},
 }