Files
ngzz-mc/internal/mods/watcher.go

74 lines
1.7 KiB
Go
Raw Blame History

This file contains ambiguous Unicode characters
This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.
// 热重载驱动fsnotify 文件监听 + 防抖(热更新.md §4.5)。
package mods
import (
"fmt"
"path/filepath"
"sync"
"time"
"github.com/fsnotify/fsnotify"
)
// Watcher 脚本文件监听器(开发模式)。
type Watcher struct {
w *fsnotify.Watcher
mu sync.Mutex
reload map[string]func() error // 脚本路径 → 重载函数
timers map[string]*time.Timer // 防抖计时器500ms
}
// NewWatcher 创建监听器。
func NewWatcher() (*Watcher, error) {
w, err := fsnotify.NewWatcher()
if err != nil {
return nil, fmt.Errorf("mods.NewWatcher: %w", err)
}
return &Watcher{w: w, reload: make(map[string]func() error), timers: make(map[string]*time.Timer)}, nil
}
// WatchFile 监听一个脚本文件:变化后防抖触发 reload热更新.md §4.5 防抖 500ms
func (w *Watcher) WatchFile(path string, reload func() error) error {
if err := w.w.Add(filepath.Dir(path)); err != nil {
return fmt.Errorf("mods.WatchFile %s: %w", path, err)
}
w.mu.Lock()
w.reload[path] = reload
w.mu.Unlock()
return nil
}
// Run 事件循环goroutine文件变化 → 防抖 → 重载。
func (w *Watcher) Run() {
for {
select {
case ev, ok := <-w.w.Events:
if !ok {
return
}
if ev.Op&(fsnotify.Write|fsnotify.Create) == 0 {
continue
}
w.mu.Lock()
fn, ok := w.reload[ev.Name]
if !ok {
w.mu.Unlock()
continue
}
if t, exists := w.timers[ev.Name]; exists {
t.Stop()
}
reloadFn := fn
w.timers[ev.Name] = time.AfterFunc(500*time.Millisecond, func() { _ = reloadFn() })
w.mu.Unlock()
case _, ok := <-w.w.Errors:
if !ok {
return
}
}
}
}
// Close 停止监听。
func (w *Watcher) Close() error { return w.w.Close() }