Remove support for legacy errors

README.md

@@ -31,7 +31,6 @@ Change any of the following values by passing `-option="Value"` CLI flag to `web
 | `-json=jsoniter`   | `"stdlib"` | use alternative json encoding package                                       | v0.12.0  |
 | `-fixEmptyArrays`  | `false`    | force empty array `[]` instead of `null` in JSON (see Go [#27589][go27589]) | v0.13.0  |
 | `-errorStackTrace` | `false`    | enables error stack traces                                                  | v0.14.0  |
-| `-legacyErrors`    | `false`    | enable legacy errors (v0.10.0 or older)                                     | v0.11.0  |
 | `-webrpcHeader`    | `true`     | enable client send webrpc version in http headers                           | v0.16.0  |
 
 Example:

_examples/golang-basics/example_test.go

@@ -93,15 +93,3 @@ func TestGetUser(t *testing.T) {
 		assert.NoError(t, err)
 	}
 }
-
-func TestLegacyErrors(t *testing.T) {
-	{
-		_, err := client.GetUser(context.Background(), nil, 0)
-		assert.Error(t, err)
-		assert.ErrorIs(t, err, ErrInvalidArgument)
-
-		_, err = client.GetUser(context.Background(), nil, 1000)
-		assert.Error(t, err)
-		assert.ErrorIs(t, err, ErrUnavailable)
-	}
-}

_examples/golang-basics/main.go

@@ -1,11 +1,10 @@
 package main
 
-//go:generate go run github.com/webrpc/webrpc/cmd/webrpc-gen -schema=example.ridl -target=../../../gen-golang -pkg=main -server -client -legacyErrors -fixEmptyArrays -out=./example.gen.go
+//go:generate go run github.com/webrpc/webrpc/cmd/webrpc-gen -schema=example.ridl -target=../../../gen-golang -pkg=main -server -client -fixEmptyArrays -out=./example.gen.go
 
 import (
 	"context"
 	"fmt"
-	"io"
 	"log"
 	"net/http"
 
@@ -82,7 +81,7 @@ func (rpc *ExampleServiceRPC) Version(ctx context.Context) (*Version, error) {
 
 func (s *ExampleServiceRPC) GetUser(ctx context.Context, header map[string]string, userID uint64) (*User, error) {
 	if userID == 911 {
-		return nil, ErrorWithCause(ErrUserNotFound, fmt.Errorf("unknown user id %d", userID))
+		return nil, ErrUserNotFound.WithCausef("unknown user id %d", userID)
 	}
 	if userID == 31337 {
 		return nil, ErrUnauthorized
@@ -91,14 +90,6 @@ func (s *ExampleServiceRPC) GetUser(ctx context.Context, header map[string]strin
 		panic("oh no")
 	}
 
-	// Legacy errors.
-	switch userID {
-	case 0:
-		return nil, Errorf(ErrInvalidArgument, "userId is required")
-	case 1000:
-		return nil, WrapError(ErrUnavailable, io.ErrUnexpectedEOF, "service unavailable")
-	}
-
 	return &User{
 		ID:       userID,
 		Username: "hihi",
@@ -107,7 +98,7 @@ func (s *ExampleServiceRPC) GetUser(ctx context.Context, header map[string]strin
 
 func (rpc *ExampleServiceRPC) FindUser(ctx context.Context, s *SearchFilter) (string, *User, error) {
 	if s == nil {
-		return "", nil, ErrorWithCause(ErrMissingArgument, fmt.Errorf("s search filter required"))
+		return "", nil, ErrMissingArgument.WithCausef("s search filter required")
 	}
 	name := s.Q
 	return s.Q, &User{

_examples/golang-imports/main.go

@@ -1,6 +1,6 @@
 package main
 
-//go:generate go run github.com/webrpc/webrpc/cmd/webrpc-gen -schema=./proto/api.ridl -target=../../../gen-golang -out=./api.gen.go -pkg=main -server -client -legacyErrors=true -fmt=false
+//go:generate go run github.com/webrpc/webrpc/cmd/webrpc-gen -schema=./proto/api.ridl -target=../../../gen-golang -out=./api.gen.go -pkg=main -server -client -fmt=false
 
 import (
 	"context"

errors.go.tmpl

@@ -36,11 +36,6 @@ func (e WebRPCError) Is(target error) bool {
 	if rpcErr, ok := target.(WebRPCError); ok {
 		return rpcErr.Code == e.Code
 	}
-{{- if $opts.legacyErrors }}
-	if legacyErr, ok := target.(legacyError); ok {
-		return legacyErr.Code == e.Code
-	}
-{{- end }}
 	return errors.Is(e.cause, target)
 }