1 files changed, 163 insertions, 0 deletions
diff --git a/vendor/github.com/99designs/gqlgen/internal/code/compare.go b/vendor/github.com/99designs/gqlgen/internal/code/compare.go
new file mode 100644
index 00000000..dce9aea5
--- /dev/null
+++ b/vendor/github.com/99designs/gqlgen/internal/code/compare.go
@@ -0,0 +1,163 @@
+package code
+
+import (
+	"fmt"
+	"go/types"
+)
+
+// CompatibleTypes isnt a strict comparison, it allows for pointer differences
+func CompatibleTypes(expected types.Type, actual types.Type) error {
+	//fmt.Println("Comparing ", expected.String(), actual.String())
+
+	// Special case to deal with pointer mismatches
+	{
+		expectedPtr, expectedIsPtr := expected.(*types.Pointer)
+		actualPtr, actualIsPtr := actual.(*types.Pointer)
+
+		if expectedIsPtr && actualIsPtr {
+			return CompatibleTypes(expectedPtr.Elem(), actualPtr.Elem())
+		}
+		if expectedIsPtr && !actualIsPtr {
+			return CompatibleTypes(expectedPtr.Elem(), actual)
+		}
+		if !expectedIsPtr && actualIsPtr {
+			return CompatibleTypes(expected, actualPtr.Elem())
+		}
+	}
+
+	switch expected := expected.(type) {
+	case *types.Slice:
+		if actual, ok := actual.(*types.Slice); ok {
+			return CompatibleTypes(expected.Elem(), actual.Elem())
+		}
+
+	case *types.Array:
+		if actual, ok := actual.(*types.Array); ok {
+			if expected.Len() != actual.Len() {
+				return fmt.Errorf("array length differs")
+			}
+
+			return CompatibleTypes(expected.Elem(), actual.Elem())
+		}
+
+	case *types.Basic:
+		if actual, ok := actual.(*types.Basic); ok {
+			if actual.Kind() != expected.Kind() {
+				return fmt.Errorf("basic kind differs, %s != %s", expected.Name(), actual.Name())
+			}
+
+			return nil
+		}
+
+	case *types.Struct:
+		if actual, ok := actual.(*types.Struct); ok {
+			if expected.NumFields() != actual.NumFields() {
+				return fmt.Errorf("number of struct fields differ")
+			}
+
+			for i := 0; i < expected.NumFields(); i++ {
+				if expected.Field(i).Name() != actual.Field(i).Name() {
+					return fmt.Errorf("struct field %d name differs, %s != %s", i, expected.Field(i).Name(), actual.Field(i).Name())
+				}
+				if err := CompatibleTypes(expected.Field(i).Type(), actual.Field(i).Type()); err != nil {
+					return err
+				}
+			}
+			return nil
+		}
+
+	case *types.Tuple:
+		if actual, ok := actual.(*types.Tuple); ok {
+			if expected.Len() != actual.Len() {
+				return fmt.Errorf("tuple length differs, %d != %d", expected.Len(), actual.Len())
+			}
+
+			for i := 0; i < expected.Len(); i++ {
+				if err := CompatibleTypes(expected.At(i).Type(), actual.At(i).Type()); err != nil {
+					return err
+				}
+			}
+
+			return nil
+		}
+
+	case *types.Signature:
+		if actual, ok := actual.(*types.Signature); ok {
+			if err := CompatibleTypes(expected.Params(), actual.Params()); err != nil {
+				return err
+			}
+			if err := CompatibleTypes(expected.Results(), actual.Results()); err != nil {
+				return err
+			}
+
+			return nil
+		}
+	case *types.Interface:
+		if actual, ok := actual.(*types.Interface); ok {
+			if expected.NumMethods() != actual.NumMethods() {
+				return fmt.Errorf("interface method count differs, %d != %d", expected.NumMethods(), actual.NumMethods())
+			}
+
+			for i := 0; i < expected.NumMethods(); i++ {
+				if expected.Method(i).Name() != actual.Method(i).Name() {
+					return fmt.Errorf("interface method %d name differs, %s != %s", i, expected.Method(i).Name(), actual.Method(i).Name())
+				}
+				if err := CompatibleTypes(expected.Method(i).Type(), actual.Method(i).Type()); err != nil {
+					return err
+				}
+			}
+
+			return nil
+		}
+
+	case *types.Map:
+		if actual, ok := actual.(*types.Map); ok {
+			if err := CompatibleTypes(expected.Key(), actual.Key()); err != nil {
+				return err
+			}
+
+			if err := CompatibleTypes(expected.Elem(), actual.Elem()); err != nil {
+				return err
+			}
+
+			return nil
+		}
+
+	case *types.Chan:
+		if actual, ok := actual.(*types.Chan); ok {
+			return CompatibleTypes(expected.Elem(), actual.Elem())
+		}
+
+	case *types.Named:
+		if actual, ok := actual.(*types.Named); ok {
+			if NormalizeVendor(expected.Obj().Pkg().Path()) != NormalizeVendor(actual.Obj().Pkg().Path()) {
+				return fmt.Errorf(
+					"package name of named type differs, %s != %s",
+					NormalizeVendor(expected.Obj().Pkg().Path()),
+					NormalizeVendor(actual.Obj().Pkg().Path()),
+				)
+			}
+
+			if expected.Obj().Name() != actual.Obj().Name() {
+				return fmt.Errorf(
+					"named type name differs, %s != %s",
+					NormalizeVendor(expected.Obj().Name()),
+					NormalizeVendor(actual.Obj().Name()),
+				)
+			}
+
+			return nil
+		}
+
+		// Before models are generated all missing references will be Invalid Basic references.
+		// lets assume these are valid too.
+		if actual, ok := actual.(*types.Basic); ok && actual.Kind() == types.Invalid {
+			return nil
+		}
+
+	default:
+		return fmt.Errorf("missing support for %T", expected)
+	}
+
+	return fmt.Errorf("type mismatch %T != %T", expected, actual)
+}