feat: documentation and cleanup command

hcloudimages/internal/actionutil/action.go

@@ -0,0 +1,25 @@
+package actionutil
+
+import (
+	"context"
+
+	"github.com/hetznercloud/hcloud-go/v2/hcloud"
+)
+
+func Settle(ctx context.Context, client hcloud.IActionClient, actions ...*hcloud.Action) (successActions []*hcloud.Action, errorActions []*hcloud.Action, err error) {
+	err = client.WaitForFunc(ctx, func(update *hcloud.Action) error {
+		switch update.Status {
+		case hcloud.ActionStatusSuccess:
+			successActions = append(successActions, update)
+		case hcloud.ActionStatusError:
+			errorActions = append(errorActions, update)
+		}
+
+		return nil
+	}, actions...)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	return successActions, errorActions, nil
+}

hcloudimages/internal/labelutil/labels.go

@@ -0,0 +1,30 @@
+package labelutil
+
+import "fmt"
+
+func Merge(a, b map[string]string) map[string]string {
+	result := make(map[string]string, len(a)+len(b))
+
+	for k, v := range a {
+		result[k] = v
+	}
+	for k, v := range b {
+		result[k] = v
+	}
+
+	return result
+}
+
+func Selector(labels map[string]string) string {
+	selector := make([]byte, 0, 64)
+	separator := ""
+
+	for k, v := range labels {
+		selector = fmt.Appendf(selector, "%s%s=%s", separator, k, v)
+
+		// Do not print separator on first element
+		separator = ","
+	}
+
+	return string(selector)
+}