Use github.com/pkg/errors and embed error cause in FormattedError

Author: Damir Vandic

executor.go

@@ -2,13 +2,13 @@ package graphql
 
 import (
 	"context"
-	"errors"
 	"fmt"
 	"reflect"
 	"strings"
 
 	"github.com/graphql-go/graphql/gqlerrors"
 	"github.com/graphql-go/graphql/language/ast"
+	"github.com/pkg/errors"
 )
 
 type ExecuteParams struct {

gqlerrors/formatted.go

@@ -1,20 +1,24 @@
 package gqlerrors
 
 import (
-	"errors"
-
 	"github.com/graphql-go/graphql/language/location"
+	"github.com/pkg/errors"
 )
 
 type FormattedError struct {
 	Message   string                    `json:"message"`
 	Locations []location.SourceLocation `json:"locations"`
+	cause     error
 }
 
 func (g FormattedError) Error() string {
 	return g.Message
 }
 
+func (g FormattedError) Cause() error {
+	return g.cause
+}
+
 func NewFormattedError(message string) FormattedError {
 	err := errors.New(message)
 	return FormatError(err)
@@ -38,6 +42,7 @@ func FormatError(err error) FormattedError {
 		return FormattedError{
 			Message:   err.Error(),
 			Locations: []location.SourceLocation{},
+			cause:     err,
 		}
 	}
 }

gqlerrors/located.go

@@ -1,8 +1,8 @@
 package gqlerrors
 
 import (
-	"errors"
 	"github.com/graphql-go/graphql/language/ast"
+	"github.com/pkg/errors"
 )
 
 // NewLocatedError creates a graphql.Error with location info

located.go

@@ -1,9 +1,9 @@
 package graphql
 
 import (
-	"errors"
 	"github.com/graphql-go/graphql/gqlerrors"
 	"github.com/graphql-go/graphql/language/ast"
+	"github.com/pkg/errors"
 )
 
 func NewLocatedError(err interface{}, nodes []ast.Node) *gqlerrors.Error {