Refactor git attributes (#29356)

modules/git/attribute.go

@@ -0,0 +1,35 @@
+// Copyright 2024 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package git
+
+import (
+	"code.gitea.io/gitea/modules/optional"
+)
+
+const (
+	AttributeLinguistVendored      = "linguist-vendored"
+	AttributeLinguistGenerated     = "linguist-generated"
+	AttributeLinguistDocumentation = "linguist-documentation"
+	AttributeLinguistDetectable    = "linguist-detectable"
+	AttributeLinguistLanguage      = "linguist-language"
+	AttributeGitlabLanguage        = "gitlab-language"
+)
+
+// true if "set"/"true", false if "unset"/"false", none otherwise
+func AttributeToBool(attr map[string]string, name string) optional.Option[bool] {
+	switch attr[name] {
+	case "set", "true":
+		return optional.Some(true)
+	case "unset", "false":
+		return optional.Some(false)
+	}
+	return optional.None[bool]()
+}
+
+func AttributeToString(attr map[string]string, name string) optional.Option[string] {
+	if value, has := attr[name]; has && value != "unspecified" {
+		return optional.Some(value)
+	}
+	return optional.None[string]()
+}