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validate.go
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validate.go
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// Copyright 2020-2021 Buf Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package bufmodule
import (
"errors"
"fmt"
"github.com/bufbuild/buf/private/bufpkg/bufmodule/bufmoduleref"
modulev1alpha1 "github.com/bufbuild/buf/private/gen/proto/go/buf/alpha/module/v1alpha1"
)
const (
// 32MB
maxModuleTotalContentLength = 32 << 20
protoFileMaxCount = 16384
)
// ValidateProtoModule verifies the given module is well-formed.
// It performs client-side validation only, and is limited to fields
// we do not think will change in the future.
func ValidateProtoModule(protoModule *modulev1alpha1.Module) error {
if protoModule == nil {
return errors.New("module is required")
}
if len(protoModule.Files) == 0 {
return errors.New("module has no files")
}
if len(protoModule.Files) > protoFileMaxCount {
return fmt.Errorf("module can contain at most %d files", protoFileMaxCount)
}
totalContentLength := 0
filePathMap := make(map[string]struct{}, len(protoModule.Files))
for _, protoModuleFile := range protoModule.Files {
if err := bufmoduleref.ValidateModuleFilePath(protoModuleFile.Path); err != nil {
return err
}
if _, ok := filePathMap[protoModuleFile.Path]; ok {
return fmt.Errorf("duplicate module file path: %s", protoModuleFile.Path)
}
filePathMap[protoModuleFile.Path] = struct{}{}
totalContentLength += len(protoModuleFile.Content)
}
if totalContentLength > maxModuleTotalContentLength {
return fmt.Errorf("total module content length is %d when max is %d", totalContentLength, maxModuleTotalContentLength)
}
for _, dependency := range protoModule.Dependencies {
if err := bufmoduleref.ValidateProtoModulePin(dependency); err != nil {
return fmt.Errorf("module had invalid dependency: %v", err)
}
}
return nil
}