fix: dont fail if there is a .go directory

internal/builders/golang/build.go

@@ -227,7 +227,7 @@ func checkMain(build config.Build) error {
 		return ferr
 	}
 	if stat.IsDir() {
-		packs, err := parser.ParseDir(token.NewFileSet(), main, nil, 0)
+		packs, err := parser.ParseDir(token.NewFileSet(), main, fileFilter, 0)
 		if err != nil {
 			return fmt.Errorf("failed to parse dir: %s: %w", main, err)
 		}
@@ -250,6 +250,10 @@ func checkMain(build config.Build) error {
 	return fmt.Errorf("build for %s does not contain a main function", build.Binary)
 }
 
+func fileFilter(info os.FileInfo) bool {
+	return !info.IsDir()
+}
+
 func hasMain(file *ast.File) bool {
 	for _, decl := range file.Decls {
 		fn, isFn := decl.(*ast.FuncDecl)

internal/builders/golang/build_test.go

@@ -342,6 +342,33 @@ func TestBuildCodeInSubdir(t *testing.T) {
 	require.NoError(t, err)
 }
 
+func TestBuildWithDotGoDir(t *testing.T) {
+	folder, back := testlib.Mktmp(t)
+	defer back()
+	require.NoError(t, os.Mkdir(filepath.Join(folder, ".go"), 0755))
+	writeGoodMain(t, folder)
+	var config = config.Project{
+		Builds: []config.Build{
+			{
+				ID:       "foo",
+				Env:      []string{"GO111MODULE=off"},
+				Binary:   "foo",
+				Targets:  []string{runtimeTarget},
+				GoBinary: "go",
+			},
+		},
+	}
+	var ctx = context.New(config)
+	ctx.Git.CurrentTag = "5.6.7"
+	var build = ctx.Config.Builds[0]
+	require.NoError(t, Default.Build(ctx, build, api.Options{
+		Target: runtimeTarget,
+		Name:   build.Binary,
+		Path:   filepath.Join(folder, "dist", runtimeTarget, build.Binary),
+		Ext:    "",
+	}))
+}
+
 func TestBuildFailed(t *testing.T) {
 	folder, back := testlib.Mktmp(t)
 	defer back()