gohugoio/hugo · error

origin must be /

Error message

origin must be <project>/<origin>

What it means

InvalidateGoogleCloudCDN (deploy/google.go:28, built only with the 'withdeploy' tag) splits the origin string on '/' and requires exactly two parts: <GCP project>/<CDN origin name>. It then calls compute.UrlMaps.InvalidateCache(project, origin). This fires when GoogleCloudCDNOrigin is missing the slash, has multiple slashes, or is empty-ish.

Solutions

1. Set googleCloudCDNOrigin to exactly '<project>/<origin>', e.g. 'my-gcp-project/my-load-balancer-origin'.
2. Ensure no leading/trailing slash and exactly one separating slash.
3. If you do not use Google Cloud CDN, leave googleCloudCDNOrigin empty.

Example fix

# before
[[deployment.targets]]
name = "gcp"
googleCloudCDNOrigin = "my-project"

# after
[[deployment.targets]]
name = "gcp"
googleCloudCDNOrigin = "my-project/my-origin"

// Enforce the <project>/<origin> shape before deploying.
func ValidateGoogleCDNOrigin(origin string) error {
    parts := strings.Split(origin, "/")
    if len(parts) != 2 || parts[0] == "" || parts[1] == "" {
        return fmt.Errorf("origin must be <project>/<origin>, got %q", origin)
    }
    return nil
}

if err := deploy.InvalidateGoogleCloudCDN(ctx, origin); err != nil {
    return err
}

When it happens

Trigger: Setting a target's googleCloudCDNOrigin to 'myproject' (no slash), 'a/b/c' (two slashes), or '/origin' (empty project); the value flows from deployconfig.Target.GoogleCloudCDNOrigin through deploy.go:290.

Common situations: Confusing the origin format with a URL or a bare origin name; copy-pasting a CloudFront distribution id into the Google field.

Related errors

• deployment target not found
• empty deployment matcher
• empty deployment target
• invalid deployment.matchers.pattern
• invalid deployment.orderings.pattern

AI-assisted analysis of gohugoio/hugo@52c9bd7908 (2026-08-09). Data as JSON: /api/errors/7bf481753ade4b08. Report an issue: GitHub.

Appendix: source

Thrown at deploy/google.go:30

// limitations under the License.

//go:build withdeploy

package deploy

import (
	"context"
	"fmt"
	"strings"

	"google.golang.org/api/compute/v1"
)

// Invalidate all of the content in a Google Cloud CDN distribution.
func InvalidateGoogleCloudCDN(ctx context.Context, origin string) error {
	parts := strings.Split(origin, "/")
	if len(parts) != 2 {
		return fmt.Errorf("origin must be <project>/<origin>")
	}
	service, err := compute.NewService(ctx)
	if err != nil {
		return err
	}
	rule := &compute.CacheInvalidationRule{Path: "/*"}
	_, err = service.UrlMaps.InvalidateCache(parts[0], parts[1], rule).Context(ctx).Do()
	return err
}

View on GitHub (pinned to 52c9bd7908)