mirror of
https://github.com/go-gitea/gitea.git
synced 2024-11-23 16:50:46 +08:00
9f8d59858a
This PR reduces the complexity of the system setting system. It only needs one line to introduce a new option, and the option can be used anywhere out-of-box. It is still high-performant (and more performant) because the config values are cached in the config system.
82 lines
1.7 KiB
Go
82 lines
1.7 KiB
Go
// Copyright 2023 The Gitea Authors. All rights reserved.
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
package config
|
|
|
|
import (
|
|
"context"
|
|
"strconv"
|
|
"sync"
|
|
)
|
|
|
|
type CfgSecKey struct {
|
|
Sec, Key string
|
|
}
|
|
|
|
type Value[T any] struct {
|
|
mu sync.RWMutex
|
|
|
|
cfgSecKey CfgSecKey
|
|
dynKey string
|
|
|
|
def, value T
|
|
revision int
|
|
}
|
|
|
|
func (value *Value[T]) parse(s string) (v T) {
|
|
switch any(v).(type) {
|
|
case bool:
|
|
b, _ := strconv.ParseBool(s)
|
|
return any(b).(T)
|
|
default:
|
|
panic("unsupported config type, please complete the code")
|
|
}
|
|
}
|
|
|
|
func (value *Value[T]) Value(ctx context.Context) (v T) {
|
|
dg := GetDynGetter()
|
|
if dg == nil {
|
|
// this is an edge case: the database is not initialized but the system setting is going to be used
|
|
// it should panic to avoid inconsistent config values (from config / system setting) and fix the code
|
|
panic("no config dyn value getter")
|
|
}
|
|
|
|
rev := dg.GetRevision(ctx)
|
|
|
|
// if the revision in database doesn't change, use the last value
|
|
value.mu.RLock()
|
|
if rev == value.revision {
|
|
v = value.value
|
|
value.mu.RUnlock()
|
|
return v
|
|
}
|
|
value.mu.RUnlock()
|
|
|
|
// try to parse the config and cache it
|
|
var valStr *string
|
|
if dynVal, has := dg.GetValue(ctx, value.dynKey); has {
|
|
valStr = &dynVal
|
|
} else if cfgVal, has := GetCfgSecKeyGetter().GetValue(value.cfgSecKey.Sec, value.cfgSecKey.Key); has {
|
|
valStr = &cfgVal
|
|
}
|
|
if valStr == nil {
|
|
v = value.def
|
|
} else {
|
|
v = value.parse(*valStr)
|
|
}
|
|
|
|
value.mu.Lock()
|
|
value.value = v
|
|
value.revision = rev
|
|
value.mu.Unlock()
|
|
return v
|
|
}
|
|
|
|
func (value *Value[T]) DynKey() string {
|
|
return value.dynKey
|
|
}
|
|
|
|
func Bool(def bool, cfgSecKey CfgSecKey, dynKey string) *Value[bool] {
|
|
return &Value[bool]{def: def, cfgSecKey: cfgSecKey, dynKey: dynKey}
|
|
}
|