dry run for forget cmd

cmd/check.go

@@ -17,6 +17,7 @@ package cmd
 
 import (
 	"errors"
+	"fmt"
 
 	"github.com/cupcakearmy/autorestic/internal"
 	"github.com/spf13/cobra"
@@ -33,6 +34,7 @@ var checkCmd = &cobra.Command{
 		config := internal.GetConfig()
 		err := config.CheckConfig()
 		cobra.CheckErr(err)
+		fmt.Println("Everyting is fine.")
 	},
 }
 

cmd/forget.go

@@ -33,9 +33,10 @@ var forgetCmd = &cobra.Command{
 			selected, err := internal.GetAllOrSelected(cmd, false)
 			cobra.CheckErr(err)
 			prune, _ := cmd.Flags().GetBool("prune")
+			dry, _ := cmd.Flags().GetBool("dry-run")
 			for _, name := range selected {
 				location := config.Locations[name]
-				err := location.Forget(prune)
+				err := location.Forget(prune, dry)
 				cobra.CheckErr(err)
 			}
 		}
@@ -46,4 +47,5 @@ func init() {
 	rootCmd.AddCommand(forgetCmd)
 	internal.AddFlagsToCommand(forgetCmd, false)
 	forgetCmd.Flags().Bool("prune", false, "Also prune repository")
+	forgetCmd.Flags().Bool("dry-run", false, "Do not write changes, show what would be affected")
 }

internal/config.go

@@ -101,6 +101,9 @@ func GetAllOrSelected(cmd *cobra.Command, backends bool) ([]string, error) {
 				}
 			}
 		}
+		if len(selected) == 0 {
+			return selected, fmt.Errorf("nothing selected, aborting")
+		}
 		return selected, nil
 	}
 }

internal/location.go

@@ -87,7 +87,7 @@ func (l Location) Backup() error {
 	return nil
 }
 
-func (l Location) Forget(prune bool) error {
+func (l Location) Forget(prune bool, dry bool) error {
 	c := GetConfig()
 	from := GetPathRelativeToConfig(l.From)
 	for _, to := range l.To {
@@ -101,6 +101,9 @@ func (l Location) Forget(prune bool) error {
 		if prune {
 			cmd = append(cmd, "--prune")
 		}
+		if dry {
+			cmd = append(cmd, "--dry-run")
+		}
 		cmd = append(cmd, flags...)
 		out, err := ExecuteResticCommand(options, cmd...)
 		fmt.Println(out)