fix anonymous func arg names and name collision

field.go

@@ -14,36 +14,22 @@ type ParsedField struct {
 	Type      string
 }
 
-func getFieldName(i int, field *ast.Field) string {
-	if len(field.Names) == 0 {
-		return fmt.Sprintf("a%d", i)
-	}
-	names := make([]string, 0, len(field.Names))
-	for _, name := range field.Names {
-		names = append(names, name.Name)
-	}
-	return strings.Join(names, ", ")
+func getFieldName(i int) string {
+	return fmt.Sprintf("a%d", i)
 }
 
 func getFieldCallingName(i int, field *ast.Field) string {
-	if len(field.Names) == 0 {
-		return fmt.Sprintf("a%d", i)
-	}
 	switch field.Type.(type) {
 	case *ast.Ellipsis:
-		return fmt.Sprintf("%s...", getFieldName(i, field))
-	}
-	names := make([]string, 0, len(field.Names))
-	for _, name := range field.Names {
-		names = append(names, name.Name)
+		return fmt.Sprintf("%s...", getFieldName(i))
 	}
-	return strings.Join(names, ",")
+	return getFieldName(i)
 }
 
 func (f *ParsedInterface) PrintAstField(i int, field *ast.Field, printName bool) string {
 	typeName := f.printAstExpr(field.Type)
 	if printName {
-		return fmt.Sprintf("%s %s", getFieldName(i, field), typeName)
+		return fmt.Sprintf("%s %s", getFieldName(i), typeName)
 	}
 	return typeName
 }

generator_test.go

@@ -1,6 +1,7 @@
 package fake
 
 import (
+	"os"
 	"path"
 	"testing"
 
@@ -10,7 +11,7 @@ import (
 func Test_Generate(t *testing.T) {
 	output := t.TempDir()
 	// output := "out"
-	// os.RemoveAll(output) // no caching
+	os.RemoveAll(output) // no caching
 	Run([]string{"testdata"}, output, nil)
 	g, err := NewGenerator("mocks", "testdata")
 	require.NoError(t, err)

interface.go

@@ -255,7 +255,7 @@ func (i *ParsedInterface) writeMethod(w io.Writer, methodName string, f *ParsedF
 	var argNames []string
 	var argFlag []string
 	for i := range funcType.Params.List {
-		argNames = append(argNames, getFieldName(i, funcType.Params.List[i]))
+		argNames = append(argNames, getFieldName(i))
 		nameLen := len(funcType.Params.List[i].Names)
 		if nameLen == 0 {
 			nameLen = 1

internal/caching/hash.go

@@ -47,7 +47,7 @@ func GetUncachedFiles(inputs, ignore []string, outputDir string) (map[string]Loc
 	}
 	dependencies, err := gosum.Parse(inputs[0])
 	if err != nil {
-		return nil, fmt.Errorf("parsing go.sum file: %w", err)
+		return nil, fmt.Errorf("parsing go.sum file on %s: %w", inputs[0], err)
 	}
 	goFiles, err := files.ListGoFiles(inputs, append(ignore, outputDir))
 	if err != nil {

internal/gomod/parser.go

@@ -12,7 +12,7 @@ import (
 func Parse(dir string) (map[string]string, error) {
 	goModPath, err := files.FindFile(dir, "go.mod")
 	if err != nil {
-		return nil, fmt.Errorf("could not find go.sum: %w", err)
+		return nil, fmt.Errorf("could not find go.mod: %w", err)
 	}
 	f, err := os.Open(goModPath)
 	if err != nil {

internal/gosum/parser.go

@@ -39,7 +39,7 @@ func readGoSum(path string, goMod map[string]string) (map[string]string, error)
 func Parse(dir string) (map[string]string, error) {
 	goMod, err := gomod.Parse(dir)
 	if err != nil {
-		return nil, fmt.Errorf("could not read go.mod: %w", err)
+		return nil, fmt.Errorf("could not parse go.mod: %w", err)
 	}
 	goSumPath, err := files.FindFile(dir, "go.sum")
 	if err != nil {