forked from bufbuild/buf
/
proto_encoding_writer.go
89 lines (82 loc) · 2.36 KB
/
proto_encoding_writer.go
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// Copyright 2020-2023 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 bufwire
import (
"context"
"errors"
"os"
"github.com/bufbuild/buf/private/buf/bufconvert"
"github.com/bufbuild/buf/private/bufpkg/bufimage"
"github.com/bufbuild/buf/private/pkg/app"
"github.com/bufbuild/buf/private/pkg/ioextended"
"github.com/bufbuild/buf/private/pkg/protoencoding"
"go.uber.org/multierr"
"go.uber.org/zap"
"google.golang.org/protobuf/proto"
)
type protoEncodingWriter struct {
logger *zap.Logger
}
var _ ProtoEncodingWriter = &protoEncodingWriter{}
func newProtoEncodingWriter(
logger *zap.Logger,
) *protoEncodingWriter {
return &protoEncodingWriter{
logger: logger,
}
}
func (p *protoEncodingWriter) PutMessage(
ctx context.Context,
container app.EnvStdoutContainer,
image bufimage.Image,
message proto.Message,
messageRef bufconvert.MessageEncodingRef,
) (retErr error) {
// Currently, this support binpb and JSON format.
resolver, err := protoencoding.NewResolver(
bufimage.ImageToFileDescriptors(
image,
)...,
)
if err != nil {
return err
}
var marshaler protoencoding.Marshaler
switch messageRef.MessageEncoding() {
case bufconvert.MessageEncodingBinpb:
marshaler = protoencoding.NewWireMarshaler()
case bufconvert.MessageEncodingJSON:
marshaler = protoencoding.NewJSONMarshaler(resolver)
case bufconvert.MessageEncodingTxtpb:
marshaler = protoencoding.NewTxtpbMarshaler(resolver)
default:
return errors.New("unknown message encoding type")
}
data, err := marshaler.Marshal(message)
if err != nil {
return err
}
writeCloser := ioextended.NopWriteCloser(container.Stdout())
if messageRef.Path() != "-" {
writeCloser, err = os.Create(messageRef.Path())
if err != nil {
return err
}
}
defer func() {
retErr = multierr.Append(retErr, writeCloser.Close())
}()
_, err = writeCloser.Write(data)
return err
}