buf: Remote modules (#1)

* Use remote packages

* v2: Use remote modules from Buf

codegen/codegen.go

@@ -6,13 +6,12 @@ import (
 	"fmt"
 	"io"
 	"os"
-)
-
-type Request = CodeGenRequest
 
-type Response = CodeGenResponse
+	pb "buf.build/gen/go/sqlc/sqlc/protocolbuffers/go/protos/plugin"
+	"google.golang.org/protobuf/proto"
+)
 
-type Handler func(context.Context, *Request) (*Response, error)
+type Handler func(context.Context, *pb.CodeGenRequest) (*pb.CodeGenResponse, error)
 
 func Run(h Handler) {
 	if err := run(h); err != nil {
@@ -22,19 +21,19 @@ func Run(h Handler) {
 }
 
 func run(h Handler) error {
-	var req Request
+	var req pb.CodeGenRequest
 	reqBlob, err := io.ReadAll(os.Stdin)
 	if err != nil {
 		return err
 	}
-	if err := req.UnmarshalVT(reqBlob); err != nil {
+	if err := proto.Unmarshal(reqBlob, &req); err != nil {
 		return err
 	}
 	resp, err := h(context.Background(), &req)
 	if err != nil {
 		return err
 	}
-	respBlob, err := resp.MarshalVT()
+	respBlob, err := proto.Marshal(resp)
 	if err != nil {
 		return err
 	}