rename field name (#413)

add test case

Author: steeling

pkg/tools/gen/gengo.go

@@ -15,9 +15,10 @@ const goAnyType = "interface{}"
 var _ Generator = &goGenerator{}
 
 type GenGoOptions struct {
-	Package  string
-	AnyType  string
-	UseValue bool
+	Package    string
+	AnyType    string
+	UseValue   bool
+	RenameFunc func(string) string
 }
 
 // GenGo translate kcl schema type to go struct.
@@ -26,7 +27,8 @@ func GenGo(w io.Writer, filename string, src interface{}, opts *GenGoOptions) er
 }
 
 type goGenerator struct {
-	opts *GenGoOptions
+	opts       *GenGoOptions
+	renameFunc func(string) string
 }
 
 func newGoGenerator(opts *GenGoOptions) *goGenerator {
@@ -35,9 +37,16 @@ func newGoGenerator(opts *GenGoOptions) *goGenerator {
 			AnyType: goAnyType,
 		}
 	}
-	return &goGenerator{
-		opts: opts,
+	generator := &goGenerator{
+		opts:       opts,
+		renameFunc: opts.RenameFunc,
 	}
+	if generator.renameFunc == nil {
+		generator.renameFunc = func(name string) string {
+			return name
+		}
+	}
+	return generator
 }
 
 func (g *goGenerator) GenFromSource(w io.Writer, filename string, src interface{}) error {
@@ -94,7 +103,7 @@ func (g *goGenerator) GenSchema(w io.Writer, typ *pb.KclType) {
 
 		goTagInfo := fmt.Sprintf(`kcl:"name=%s,type=%s"`, fieldName, g.GetFieldTag(fieldType))
 		goFieldDefines = append(goFieldDefines,
-			fmt.Sprintf("%s %s %s", fieldName, goFieldType, "`"+goTagInfo+"`"),
+			fmt.Sprintf("%s %s %s", g.renameFunc(fieldName), goFieldType, "`"+goTagInfo+"`"),
 		)
 		goFieldDocs = append(goFieldDocs,
 			fmt.Sprintf("// kcl-type: %s", kclFieldType),

pkg/tools/gen/gengo_test.go

@@ -8,6 +8,7 @@ import (
 	"log"
 	"testing"
 
+	"github.com/iancoleman/strcase"
 	"kcl-lang.io/kcl-go/pkg/tools/gen"
 )
 
@@ -72,3 +73,67 @@ schema Company:
 			}
 	*/
 }
+
+func TestGenGoWithRename(t *testing.T) {
+	const code = `
+import units
+
+type NumberMultiplier = units.NumberMultiplier
+
+schema Person:
+	"""Person Example"""
+	name: str = "kcl"
+	age: int = 2
+	friends?: [str] = None
+	movies?: {str: Movie} = None
+
+schema Movie:
+	desc: str = ""
+	size: NumberMultiplier = 2M
+	kind?: "Superhero" | "War" | "Unknown"
+	unknown1?: int | str = None
+	unknown2?: any = None
+
+schema employee(Person):
+    bankCard: int
+    nationality: str
+
+schema Company:
+    name: str
+    employees: [employee]
+    persons: Person
+`
+	var buf bytes.Buffer
+	err := gen.GenGo(&buf, "hello.k", code, &gen.GenGoOptions{
+		RenameFunc: func(name string) string {
+			return strcase.ToCamel(name)
+		},
+	})
+	if err != nil {
+		log.Fatal(err)
+	}
+	goCode := buf.String()
+	fmt.Println(goCode)
+	/*
+			expectedGoCode := `
+		// Person Example
+		type Person struct {
+		    name string              // kcl-type: str
+		    age int                  // kcl-type: int
+		    friends []string         // kcl-type: [str]
+		    movies map[string]*Movie // kcl-type: {str:Movie}
+		}
+
+		type Movie struct {
+		    desc string          // kcl-type: str
+		    size int             // kcl-type: units.NumberMultiplier
+		    kind string          // kcl-type: "Superhero"|"War"|"Unknown"
+		    unknown1 interface{} // kcl-type: int|str
+		    unknown2 interface{} // kcl-type: any
+		}
+		`
+			if goCode != expectedGoCode {
+				panic(fmt.Sprintf("test failed, expected %s got %s", expectedGoCode, goCode))
+			}
+	*/
+}