add failure and success hooks

cmd/backup.go

@@ -17,15 +17,15 @@ var backupCmd = &cobra.Command{
 		CheckErr(err)
 		defer lock.Unlock()
 
-		CheckErr(internal.CheckConfig())
+		internal.GetConfig()
 
 		selected, err := internal.GetAllOrSelected(cmd, false)
 		CheckErr(err)
 		errors := 0
 		for _, name := range selected {
 			location, _ := internal.GetLocation(name)
-			err := location.Backup(false)
-			if err != nil {
+			errs := location.Backup(false)
+			for err := range errs {
 				colors.Error.Println(err)
 				errors++
 			}

docs/markdown/location/hooks.md

@@ -2,7 +2,14 @@
 
 If you want to perform some commands before and/or after a backup, you can use hooks.
 
-They consist of a list of `before`/`after` commands that will be executed in the same directory as the target `from`.
+They consist of a list of commands that will be executed in the same directory as the target `from`.
+
+The following hooks groups are supported, none are required:
+
+- `before`
+- `after`
+- `failure`
+- `success`
 
 ```yml | .autorestic.yml
 locations:
@@ -11,10 +18,25 @@ locations:
     to: my-backend
     hooks:
       before:
-        - echo "Hello"
-        - echo "Human"
+        - echo "One"
+        - echo "Two"
+        - echo "Three"
       after:
-        - echo "kthxbye"
+        - echo "Byte"
+      failure:
+        - echo "Something went wrong"
+      success:
+        - echo "Well done!"
 ```
 
+## Flowchart
+
+1. `before` hook
+2. Run backup
+3. `after` hook
+4. - `success` hook if no errors were found
+   - `failure` hook if at least error was encountered
+
+If the `before` hook encounters errors the backup and `after` hooks will be skipped and only the `failed` hooks will run.
+
 > :ToCPrevNext

internal/config.go

@@ -75,21 +75,22 @@ func (c *Config) Describe() {
 			colors.PrintDescription("Cron", l.Cron)
 		}
 
-		after, before := len(l.Hooks.After), len(l.Hooks.Before)
-		if after+before > 0 {
 		tmp = ""
-			if before > 0 {
-				tmp += "\tBefore"
-				for _, cmd := range l.Hooks.Before {
+		hooks := map[string][]string{
+			"Before":  l.Hooks.Before,
+			"After":   l.Hooks.After,
+			"Failure": l.Hooks.Failure,
+			"Success": l.Hooks.Success,
+		}
+		for hook, commands := range hooks {
+			if len(commands) > 0 {
+				tmp += "\n\t" + hook
+				for _, cmd := range commands {
 					tmp += colors.Faint.Sprintf("\n\t  ▶ %s", cmd)
 				}
 			}
-			if after > 0 {
-				tmp += "\n\tAfter"
-				for _, cmd := range l.Hooks.After {
-					tmp += colors.Faint.Sprintf("\n\t  ▶ %s", cmd)
-				}
 		}
+		if tmp != "" {
 			colors.PrintDescription("Hooks", tmp)
 		}
 

internal/location.go

@@ -24,8 +24,10 @@ const (
 type HookArray = []string
 
 type Hooks struct {
-	Before HookArray `yaml:"before"`
-	After  HookArray `yaml:"after"`
+	Before  HookArray `yaml:"before,omitempty"`
+	After   HookArray `yaml:"after,omitempty"`
+	Success HookArray `yaml:"success,omitempty"`
+	Failure HookArray `yaml:"failure,omitempty"`
 }
 
 type Options map[string]map[string][]string
@@ -133,7 +135,8 @@ func (l Location) getPath() (string, error) {
 	return "", fmt.Errorf("could not get path for location \"%s\"", l.name)
 }
 
-func (l Location) Backup(cron bool) error {
+func (l Location) Backup(cron bool) []error {
+	var errors []error
 	colors.PrimaryPrint("  Backing up location \"%s\"  ", l.name)
 	t := l.getType()
 	options := ExecuteOptions{
@@ -147,7 +150,8 @@ func (l Location) Backup(cron bool) error {
 
 	// Hooks
 	if err := ExecuteHooks(l.Hooks.Before, options); err != nil {
-		return err
+		errors = append(errors, err)
+		goto after
 	}
 
 	// Backup
@@ -156,7 +160,8 @@ func (l Location) Backup(cron bool) error {
 		colors.Secondary.Printf("Backend: %s\n", backend.name)
 		env, err := backend.getEnv()
 		if err != nil {
-			return nil
+			errors = append(errors, err)
+			continue
 		}
 
 		flags := l.getOptions("backup")
@@ -181,7 +186,8 @@ func (l Location) Backup(cron bool) error {
 		}
 		if err != nil {
 			colors.Error.Println(out)
-			return err
+			errors = append(errors, err)
+			continue
 		}
 		if VERBOSE {
 			colors.Faint.Println(out)
@@ -190,10 +196,22 @@ func (l Location) Backup(cron bool) error {
 
 	// After hooks
 	if err := ExecuteHooks(l.Hooks.After, options); err != nil {
-		return err
+		errors = append(errors, err)
+	}
+
+after:
+	var commands []string
+	if len(errors) > 0 {
+		commands = l.Hooks.Failure
+	} else {
+		commands = l.Hooks.Success
+	}
+	if err := ExecuteHooks(commands, options); err != nil {
+		errors = append(errors, err)
 	}
+
 	colors.Success.Println("Done")
-	return nil
+	return errors
 }
 
 func (l Location) Forget(prune bool, dry bool) error {