forked from tcncloud/protoc-gen-persist
/
generator.go
139 lines (123 loc) · 4.35 KB
/
generator.go
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// Copyright 2017, TCN Inc.
// All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of TCN Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package generator
import (
"fmt"
"strings"
"github.com/golang/protobuf/proto"
plugin_go "github.com/golang/protobuf/protoc-gen-go/plugin"
// "github.com/sirupsen/logrus"
)
type GeneratorStruct interface {
Generate() string
}
type Generator struct {
OriginalRequest *plugin_go.CodeGeneratorRequest
AllStructures *StructList // all structures present in the files
Files *FileList
Response *plugin_go.CodeGeneratorResponse
SourceRelative bool
// ImportPaths bool
}
func NewGenerator(request *plugin_go.CodeGeneratorRequest) *Generator {
ret := new(Generator)
ret.OriginalRequest = request
ret.AllStructures = NewStructList()
ret.Files = NewFileList()
ret.Response = new(plugin_go.CodeGeneratorResponse)
ret.SourceRelative = false
return ret
}
func (g *Generator) CommandLineParameters(parameter string) error {
// parameter := g.OriginalRequest.GetParameter()
// logrus.WithField("command line params", parameter).Info("command line parameters")
for _, p := range strings.Split(parameter, ",") {
// logrus.WithField("p", p).Info("...")
if strings.Contains(p, "=") {
cmd := strings.Split(p, "=")
switch cmd[0] {
case "paths":
if cmd[1] == "source_relative" {
g.SourceRelative = true
} else {
g.SourceRelative = false
}
}
}
}
return nil
}
func (g *Generator) GetResponse() (*plugin_go.CodeGeneratorResponse, error) {
ret := g.Response
// logrus.Debugf("going over %d files\n", len(*g.Files))
var writePkgLevel bool
for _, fileStruct := range *g.Files {
// format file Content
if !fileStruct.Dependency {
fileContents, err := fileStruct.Generate()
if err != nil {
return nil, fmt.Errorf("error generating the file struct: %s", err)
}
if !writePkgLevel {
p := &Printer{}
WritePackageLevelDeclarations(p, g.Files)
fileContents = append(fileContents, []byte(p.String())...)
writePkgLevel = true
}
ret.File = append(ret.File, &plugin_go.CodeGeneratorResponse_File{
Content: proto.String(string(FormatCode(fileStruct.GetFileName(), fileContents))),
Name: proto.String(fileStruct.GetImplFileName(g.SourceRelative)),
})
}
}
return ret, nil
}
func (g *Generator) Process() error {
// logrus.Debug("processing the generator")
for _, file := range g.OriginalRequest.ProtoFile {
dep := func() bool {
for _, fileName := range g.OriginalRequest.FileToGenerate {
if fileName == file.GetName() {
return false
}
}
return true
}()
// logrus.WithFields(logrus.Fields{
// "fileName": file.GetName(),
// "dependency?": dep,
// }).Debug("about to get or create this file")
params := ParseCommandLine(g.OriginalRequest.GetParameter())
f := g.Files.GetOrCreateFile(file, g.AllStructures, dep, params)
if err := f.Process(); err != nil {
return err
}
}
//for _, f := range *g.Files {
// f.ProcessImports()
//}
return nil
}