76 lines
2.5 KiB
Go
76 lines
2.5 KiB
Go
package main
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import (
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"fmt"
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"io"
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"os"
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"go.wit.com/log"
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)
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// makes Marshal and Unmarshal functions for protoWIRE protoTEXT and protoJSON
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func (pb *Files) marshal(f *File) {
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if argv.DryRun {
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return
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}
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w, _ := os.OpenFile(f.Filebase+".marshal.pb.go", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
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headerComment(w)
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fmt.Fprintf(w, "package %s\n", f.Package)
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fmt.Fprintln(w, "import (")
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fmt.Fprintln(w, " \"google.golang.org/protobuf/encoding/protojson\"")
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fmt.Fprintln(w, " \"google.golang.org/protobuf/encoding/prototext\"")
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fmt.Fprintln(w, " \"google.golang.org/protobuf/proto\"")
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fmt.Fprintln(w, ")")
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fmt.Fprintln(w, "")
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for _, msg := range f.MsgNames {
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if msg.DoMarshal {
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marshalThing(w, msg.Name)
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} else {
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log.Info("Skipping. DoMarshal = false for", msg.Name)
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}
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}
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}
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func marshalThing(w io.Writer, thing string) {
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fmt.Fprintln(w, "// human readable JSON")
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fmt.Fprintln(w, "func (v *"+thing+") FormatJSON() string {")
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fmt.Fprintln(w, " return protojson.Format(v)")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, "// marshal json")
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fmt.Fprintln(w, "func (v *"+thing+") MarshalJSON() ([]byte, error) {")
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fmt.Fprintln(w, " return protojson.Marshal(v)")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, "// unmarshal json")
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fmt.Fprintln(w, "func (v *"+thing+") UnmarshalJSON(data []byte) error {")
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fmt.Fprintln(w, " return protojson.Unmarshal(data, v)")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, "// apparently this isn't stable, but it's awesomely better")
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fmt.Fprintln(w, "// https://protobuf.dev/reference/go/faq/#unstable-text")
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fmt.Fprintln(w, "// it's brilliant for config files!")
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fmt.Fprintln(w, "func (v *"+thing+") FormatTEXT() string {")
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fmt.Fprintln(w, " return prototext.Format(v)")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, "// unmarshalTEXT. This reads the .text config file back in after the user edits it")
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fmt.Fprintln(w, "func (v *"+thing+") UnmarshalTEXT(data []byte) error {")
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fmt.Fprintln(w, " return prototext.Unmarshal(data, v)")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, "// marshal to wire. This is called winning.")
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fmt.Fprintln(w, "func (v *"+thing+") Marshal() ([]byte, error) {")
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fmt.Fprintln(w, " return proto.Marshal(v)")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, "// unmarshal from wire. You have won.")
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fmt.Fprintln(w, "func (v *"+thing+") Unmarshal(data []byte) error {")
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fmt.Fprintln(w, " return proto.Unmarshal(data, v)")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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}
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