1 files changed, 39 insertions, 0 deletions
diff --git a/modules/setting/config_provider.go b/modules/setting/config_provider.go
new file mode 100644
index 0000000000..67a4e4ded1
--- /dev/null
+++ b/modules/setting/config_provider.go
@@ -0,0 +1,39 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package setting
+
+import (
+	"code.gitea.io/gitea/modules/log"
+
+	ini "gopkg.in/ini.v1"
+)
+
+// ConfigProvider represents a config provider
+type ConfigProvider interface {
+	Section(section string) *ini.Section
+	NewSection(name string) (*ini.Section, error)
+	GetSection(name string) (*ini.Section, error)
+}
+
+// a file is an implementation ConfigProvider and other implementations are possible, i.e. from docker, k8s, …
+var _ ConfigProvider = &ini.File{}
+
+func mustMapSetting(rootCfg ConfigProvider, sectionName string, setting interface{}) {
+	if err := rootCfg.Section(sectionName).MapTo(setting); err != nil {
+		log.Fatal("Failed to map %s settings: %v", sectionName, err)
+	}
+}
+
+func deprecatedSetting(rootCfg ConfigProvider, oldSection, oldKey, newSection, newKey string) {
+	if rootCfg.Section(oldSection).HasKey(oldKey) {
+		log.Error("Deprecated fallback `[%s]` `%s` present. Use `[%s]` `%s` instead. This fallback will be removed in v1.19.0", oldSection, oldKey, newSection, newKey)
+	}
+}
+
+// deprecatedSettingDB add a hint that the configuration has been moved to database but still kept in app.ini
+func deprecatedSettingDB(rootCfg ConfigProvider, oldSection, oldKey string) {
+	if rootCfg.Section(oldSection).HasKey(oldKey) {
+		log.Error("Deprecated `[%s]` `%s` present which has been copied to database table sys_setting", oldSection, oldKey)
+	}
+}