ret.host += ":443"
	}
	const projSeg = "/projects/"
	i := strings.Index(u.Path, projSeg)
	if i == -1 {
		return nil, fmt.Errorf("webhook URL %s doesn't contain the projects segment", u)
	}
	i += len(projSeg)
	j := strings.IndexByte(u.Path[i:], '/')
	if j == -1 {
		return nil, fmt.Errorf("webhook URL %s is malformed", u)
	}
	ret.gcpProject = u.Path[i : i+j]

	const crSeg = "/ISTIO_META_CLOUDRUN_ADDR/"
	i += j

	systemRoots, err := x509.SystemCertPool()
	if err != nil {
		return nil, fmt.Errorf("failed to get system cert pool: %w", err)
	}
	gcpCreds, err := oauth.NewApplicationDefault(ctx)
	if err != nil {
		return nil, fmt.Errorf("failed to get application default credentials: %w", err)
	}

	return []grpc.DialOption{

// See the License for the specific language governing permissions and
// limitations under the License.

package kubeinject

import (
	"context"
	"fmt"
	"net/http"
	"strings"

	"golang.org/x/oauth2"
	"golang.org/x/oauth2/google"
)

func isMCPAddr(addr string) bool {
	// A bit inexact but should be good enough.