enhancement: Migrate to protovalidate

bundle/client.go

@@ -270,7 +270,7 @@ func (c *Client) parseBootstrapConf(input io.Reader) (*bootstrapv1.PDPConfig, er
 		return nil, fmt.Errorf("failed to unmarshal bootstrap proto: %w", err)
 	}
 
-	if err := out.ValidateAll(); err != nil {
+	if err := Validate(out); err != nil {
 		return out, fmt.Errorf("invalid bootstrap configuration: %w", err)
 	}
 

bundle/client_conf.go

@@ -63,7 +63,7 @@ func (cc ClientConf) Validate() (outErr error) {
 
 	if cc.PDPIdentifier == nil {
 		outErr = multierr.Append(outErr, errMissingIdentifier)
-	} else if err := cc.PDPIdentifier.ValidateAll(); err != nil {
+	} else if err := Validate(cc.PDPIdentifier); err != nil {
 		outErr = multierr.Append(outErr, fmt.Errorf("invalid PDP identifier: %w", err))
 	}
 

bundle/validate.go

@@ -0,0 +1,40 @@
+// Copyright 2021-2023 Zenauth Ltd.
+// SPDX-License-Identifier: Apache-2.0
+
+package bundle
+
+import (
+	"fmt"
+	"sync"
+
+	"github.com/bufbuild/protovalidate-go"
+	"google.golang.org/protobuf/proto"
+
+	bootstrapv1 "github.com/cerbos/cloud-api/genpb/cerbos/cloud/bootstrap/v1"
+)
+
+var (
+	validateFn    func(proto.Message) error
+	validatorOnce sync.Once
+)
+
+func Validate[T proto.Message](obj T) error {
+	validatorOnce.Do(func() {
+		validator, err := protovalidate.New(
+			protovalidate.WithMessages(
+				&bootstrapv1.PDPConfig{},
+			),
+		)
+		if err != nil {
+			validateFn = func(_ proto.Message) error {
+				return fmt.Errorf("failed to initialize validator: %w", err)
+			}
+		} else {
+			validateFn = func(m proto.Message) error {
+				return validator.Validate(m)
+			}
+		}
+	})
+
+	return validateFn(obj)
+}