Add allowFailure option

Implements #189

internal/backend.go

@@ -19,14 +19,15 @@ type BackendRest struct {
 }
 
 type Backend struct {
-	name       string
-	Type       string            `mapstructure:"type,omitempty" yaml:"type,omitempty"`
-	Path       string            `mapstructure:"path,omitempty" yaml:"path,omitempty"`
-	Key        string            `mapstructure:"key,omitempty" yaml:"key,omitempty"`
-	RequireKey bool              `mapstructure:"requireKey,omitempty" yaml:"requireKey,omitempty"`
-	Env        map[string]string `mapstructure:"env,omitempty" yaml:"env,omitempty"`
-	Rest       BackendRest       `mapstructure:"rest,omitempty" yaml:"rest,omitempty"`
-	Options    Options           `mapstructure:"options,omitempty" yaml:"options,omitempty"`
+	name         string
+	Type         string            `mapstructure:"type,omitempty" yaml:"type,omitempty"`
+	Path         string            `mapstructure:"path,omitempty" yaml:"path,omitempty"`
+	Key          string            `mapstructure:"key,omitempty" yaml:"key,omitempty"`
+	RequireKey   bool              `mapstructure:"requireKey,omitempty" yaml:"requireKey,omitempty"`
+	AllowFailure bool              `mapstructure:"allowFailure,omitempty" yaml:"allowFailure,omitempty"`
+	Env          map[string]string `mapstructure:"env,omitempty" yaml:"env,omitempty"`
+	Rest         BackendRest       `mapstructure:"rest,omitempty" yaml:"rest,omitempty"`
+	Options      Options           `mapstructure:"options,omitempty" yaml:"options,omitempty"`
 }
 
 func GetBackend(name string) (Backend, bool) {

internal/location.go

@@ -267,6 +267,13 @@ func (l Location) Backup(cron bool, specificBackend string) []error {
 
 		// If error save it and continue
 		if err != nil {
+			if backend.AllowFailure {
+				colors.Faint.Printf("skipping backend \"%s\" since allowFailure was set to \"true\"\n", to)
+				if flags.VERBOSE {
+					colors.Error.Printf("reason: %s", out)
+				}
+				continue
+			}
 			colors.Error.Println(out)
 			errors = append(errors, fmt.Errorf("%s@%s:\n%s%s", l.name, backend.name, out, err))
 			continue