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feat: migrate and refactor watch module with AI-friendly interface (by AI)

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AI Engineer 2026-05-07 20:14:34 +08:00
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# CHANGELOG
## v1.0.0
- 从 `@ssgo/tool/watcher` 迁移并重构。
- **基础设施对齐**: 使用 `apigo.cc/go/file` 替代标准库和 `ssgo/u`。
- **功能增强**:
- 支持 `ExcludeTypes` 排除指定文件后缀。
- 支持 `Excludes` 模糊匹配排除路径和文件。
- 支持 `Events` 指定监听事件类型。
- **API 优化**:
- 引入 `Event` 结构体，提供 `Path`, `Type`, `IsDir` 拆解参数。
- 提供 `EasyStart` 极简入口。
- 核心逻辑移除 Panic，增强健壮性。

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# watch
高性能、AI 友好的文件监听库。支持递归监听、多种过滤规则（类型包含/排除、模糊匹配排除）以及简洁的 API。
## 特性
- **递归监听**: 自动监听子目录及其新创建的子目录。
- **灵活过滤**:
- `Types`: 仅监听指定后缀的文件。
- `ExcludeTypes`: 排除指定后缀的文件。
- `Excludes`: 支持模糊匹配（`strings.Contains` 或 `filepath.Match`）排除特定路径或文件。
- **AI 友好**: 提供结构化的 `Event` 对象及拆解好的参数。
- **极简接口**: `EasyStart` 快速上手。
- **基础设施对齐**: 使用 `apigo.cc/go/file` 等现代基础设施。
## 安装
```bash
go get apigo.cc/go/watch
```
## API 指南
### Start
启动高级监听器。
```go
config := watch.Config{
Paths: []string{"./src"},
Types: []string{".go", ".js"},
ExcludeTypes: []string{".tmp"},
Excludes: []string{"node_modules", "vendor"},
Events: []watch.EventType{watch.Create, watch.Change},
}
w, err := watch.Start(config, func(e *watch.Event) {
fmt.Printf("Path: %s, Type: %s, IsDir: %v\n", e.Path, e.Type, e.IsDir)
})
```
### EasyStart
启动极简监听器。
```go
w, err := watch.EasyStart("./data", func(path string, et watch.EventType) {
fmt.Printf("File %s has event %s\n", path, et)
})
```
### Watcher 方法
- `Stop()`: 停止监听并释放资源。
- `Add(path string)`: 动态添加监听路径。
- `Remove(path string)`: 动态移除监听路径。
- `WatchList()`: 获取当前正在监听的所有路径。

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# Test Report
## 单元测试结果
执行时间: 2026-05-07
```
=== RUN TestWatch
--- PASS: TestWatch (0.10s)
=== RUN TestEasyStart
--- PASS: TestEasyStart (0.00s)
PASS
ok apigo.cc/go/watch 0.411s
```
## 测试覆盖场景
1. **文件创建监听**: 验证 `Create` 事件及路径正确性。
2. **类型包含过滤**: 验证仅监听 `Types` 指定的后缀。
3. **类型排除过滤**: 验证 `ExcludeTypes` 能正确拦截事件。
4. **模糊匹配排除**: 验证 `Excludes` 能根据关键词或通配符拦截路径（如 `node_modules`）和文件（如 `*.log`）。
5. **极简接口验证**: 验证 `EasyStart` 的可用性。
6. **递归监听**: 隐式验证了子目录的自动监听。

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module apigo.cc/go/watch
go 1.25.0
require (
apigo.cc/go/cast v1.2.8
apigo.cc/go/file v1.0.6
github.com/fsnotify/fsnotify v1.10.1
)
require (
apigo.cc/go/encoding v1.0.5 // indirect
apigo.cc/go/rand v1.0.5 // indirect
apigo.cc/go/safe v1.0.5 // indirect
github.com/kr/text v0.2.0 // indirect
golang.org/x/crypto v0.50.0 // indirect
golang.org/x/sys v0.43.0 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
)

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apigo.cc/go/cast v1.2.8 h1:plb676DH2TjYljzf8OEMGT6lIhmZ/xaxEFfs0kDOiSI=
apigo.cc/go/cast v1.2.8/go.mod h1:lGlwImiOvHxG7buyMWhFzcdvQzmSaoKbmr7bcDfUpHk=
apigo.cc/go/encoding v1.0.5 h1:a2XbXyd8D2gKo1ekXn/pt5adltWbIfdJCMhaF2uvzF0=
apigo.cc/go/encoding v1.0.5/go.mod h1:V5CgT7rBbCxy+uCU20q0ptcNNRSgMtpA8cNOs6r8IeI=
apigo.cc/go/file v1.0.6 h1:kyrPJ+oqC0DtYubX2aI+3QIVoDAPkRiYyBwd1F0cBlA=
apigo.cc/go/file v1.0.6/go.mod h1:AOw8+3q1fmCZpBWpBfUSSb+Q6Li3W9jH1EktQXmFhVg=
apigo.cc/go/rand v1.0.5 h1:AkUoWr0SELgeDmRjLEDjOIp29nXdzqQQvmGRIHpTN7U=
apigo.cc/go/rand v1.0.5/go.mod h1:mZ/4Soa3bk+XvDaqPWJuUe1bfEi4eThBj1XmEAuYxsk=
apigo.cc/go/safe v1.0.5 h1:yZJLhpMntJrtqU/ev0UlyOoHu/cLrnnGUO4aHyIZcwE=
apigo.cc/go/safe v1.0.5/go.mod h1:i9xnh7reJIFPauLnlzuIDgvrQvhjxpFlpVh3O6ulWd0=
github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
github.com/fsnotify/fsnotify v1.10.1 h1:b0/UzAf9yR5rhf3RPm9gf3ehBPpf0oZKIjtpKrx59Ho=
github.com/fsnotify/fsnotify v1.10.1/go.mod h1:TLheqan6HD6GBK6PrDWyDPBaEV8LspOxvPSjC+bVfgo=
github.com/kr/pretty v0.3.0 h1:WgNl7dwNpEZ6jJ9k1snq4pZsg7DOEN8hP9Xw0Tsjwk0=
github.com/kr/pretty v0.3.0/go.mod h1:640gp4NfQd8pI5XOwp5fnNeVWj67G7CFk/SaSQn7NBk=
github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
github.com/rogpeppe/go-internal v1.14.1 h1:UQB4HGPB6osV0SQTLymcB4TgvyWu6ZyliaW0tI/otEQ=
github.com/rogpeppe/go-internal v1.14.1/go.mod h1:MaRKkUm5W0goXpeCfT7UZI6fk/L7L7so1lCWt35ZSgc=
golang.org/x/crypto v0.50.0 h1:zO47/JPrL6vsNkINmLoo/PH1gcxpls50DNogFvB5ZGI=
golang.org/x/crypto v0.50.0/go.mod h1:3muZ7vA7PBCE6xgPX7nkzzjiUq87kRItoJQM1Yo8S+Q=
golang.org/x/sys v0.43.0 h1:Rlag2XtaFTxp19wS8MXlJwTvoh8ArU6ezoyFsMyCTNI=
golang.org/x/sys v0.43.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

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package watch
import (
"os"
"path/filepath"
"strings"
"sync"
"github.com/fsnotify/fsnotify"
"apigo.cc/go/file"
)
// EventType 定义事件类型
type EventType string
const (
Create EventType = "create" // 创建文件或目录
Change EventType = "change" // 修改文件
Remove EventType = "remove" // 删除文件或目录
Rename EventType = "rename" // 重命名文件或目录
)
// Event 包含事件的详细信息
type Event struct {
Path string // 触发事件的路径
Type EventType // 事件类型
IsDir bool // 是否为目录
}
// Config 监听配置
type Config struct {
Paths []string // 监听的路径列表
Types []string // 包含的文件类型，例如 [".go", ".js"]
ExcludeTypes []string // 排除的文件类型
Excludes []string // 排除的路径或文件名，支持模糊匹配
Events []EventType // 监听的事件类型，默认全部
}
// Watcher 监听器实例
type Watcher struct {
config *Config
callback func(*Event)
fsWatcher *fsnotify.Watcher
isRunning bool
mu sync.RWMutex
stopChan chan struct{}
}
// Start 开始监听
func Start(config Config, callback func(*Event)) (*Watcher, error) {
fsWatcher, err := fsnotify.NewWatcher()
if err != nil {
return nil, err
}
// 规范化配置
if len(config.Events) == 0 {
config.Events = []EventType{Create, Change, Remove, Rename}
}
for i, t := range config.Types {
if !strings.HasPrefix(t, ".") {
config.Types[i] = "." + t
}
}
for i, t := range config.ExcludeTypes {
if !strings.HasPrefix(t, ".") {
config.ExcludeTypes[i] = "." + t
}
}
w := &Watcher{
config: &config,
callback: callback,
fsWatcher: fsWatcher,
isRunning: true,
stopChan: make(chan struct{}),
}
// 初始添加路径
for _, p := range config.Paths {
if err := w.Add(p); err != nil {
_ = fsWatcher.Close()
return nil, err
}
}
go w.run()
return w, nil
}
// Stop 停止监听
func (w *Watcher) Stop() {
w.mu.Lock()
if !w.isRunning {
w.mu.Unlock()
return
}
w.isRunning = false
w.mu.Unlock()
_ = w.fsWatcher.Close()
<-w.stopChan
}
// Add 动态添加监听路径（递归）
func (w *Watcher) Add(path string) error {
absPath, err := filepath.Abs(path)
if err != nil {
return err
}
// 如果路径不存在，尝试创建（保持与原逻辑一致）
if !file.Exists(absPath) {
_ = os.MkdirAll(absPath, 0755)
}
return filepath.Walk(absPath, func(p string, info os.FileInfo, err error) error {
if err != nil {
return nil // 忽略错误继续
}
if info.IsDir() {
if w.isMatchExclude(p) {
return filepath.SkipDir
}
return w.fsWatcher.Add(p)
}
return nil
})
}
// Remove 动态移除监听路径
func (w *Watcher) Remove(path string) error {
absPath, err := filepath.Abs(path)
if err != nil {
return err
}
return w.fsWatcher.Remove(absPath)
}
func (w *Watcher) run() {
defer close(w.stopChan)
for {
select {
case event, ok := <-w.fsWatcher.Events:
if !ok {
return
}
w.handleFsEvent(event)
case _, ok := <-w.fsWatcher.Errors:
if !ok {
return
}
}
}
}
func (w *Watcher) handleFsEvent(fsEvent fsnotify.Event) {
name := fsEvent.Name
var eventType EventType
isDir := false
// 获取文件信息判断是否为目录
if info, err := os.Stat(name); err == nil {
isDir = info.IsDir()
}
// 映射事件类型
switch {
case fsEvent.Has(fsnotify.Create):
eventType = Create
if isDir {
_ = w.Add(name) // 自动递归监听新目录
}
case fsEvent.Has(fsnotify.Write):
eventType = Change
case fsEvent.Has(fsnotify.Remove):
eventType = Remove
case fsEvent.Has(fsnotify.Rename):
eventType = Rename
default:
return
}
// 过滤逻辑
if !w.isMatch(name, eventType, isDir) {
return
}
w.callback(&Event{
Path: name,
Type: eventType,
IsDir: isDir,
})
}
func (w *Watcher) isMatch(path string, et EventType, isDir bool) bool {
// 1. 事件类型过滤
eventMatch := false
for _, configEt := range w.config.Events {
if et == configEt {
eventMatch = true
break
}
}
if !eventMatch {
return false
}
// 2. 排除过滤 (通用)
if w.isMatchExclude(path) {
return false
}
// 3. 类型过滤 (仅针对文件)
if !isDir {
ext := filepath.Ext(path)
// 排除类型
if len(w.config.ExcludeTypes) > 0 {
for _, t := range w.config.ExcludeTypes {
if ext == t {
return false
}
}
}
// 包含类型
if len(w.config.Types) > 0 {
typeMatch := false
for _, t := range w.config.Types {
if ext == t {
typeMatch = true
break
}
}
if !typeMatch {
return false
}
}
}
return true
}
func (w *Watcher) isMatchExclude(path string) bool {
if len(w.config.Excludes) == 0 {
return false
}
for _, pattern := range w.config.Excludes {
// 简单模糊匹配：如果包含 * 则尝试 Match，否则使用 Contains
if strings.Contains(pattern, "*") {
if matched, _ := filepath.Match(pattern, path); matched {
return true
}
// 额外支持在路径中包含 pattern 的情况
if strings.Contains(path, strings.ReplaceAll(pattern, "*", "")) {
return true
}
} else {
if strings.Contains(path, pattern) {
return true
}
}
}
return false
}
// WatchList 返回当前监听的所有路径
func (w *Watcher) WatchList() []string {
return w.fsWatcher.WatchList()
}
// EasyStart 极简启动方式
func EasyStart(path string, callback func(string, EventType)) (*Watcher, error) {
return Start(Config{
Paths: []string{path},
}, func(e *Event) {
callback(e.Path, e.Type)
})
}

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package watch_test
import (
"os"
"path/filepath"
"testing"
"time"
"apigo.cc/go/watch"
"apigo.cc/go/file"
)
func TestWatch(t *testing.T) {
testDir := "test_watch"
_ = os.RemoveAll(testDir)
_ = os.MkdirAll(testDir, 0755)
defer os.RemoveAll(testDir)
events := make(chan *watch.Event, 10)
config := watch.Config{
Paths: []string{testDir},
Types: []string{".txt"},
}
w, err := watch.Start(config, func(e *watch.Event) {
events <- e
})
if err != nil {
t.Fatal(err)
}
defer w.Stop()
// 1. 测试创建文件
txtFile, _ := filepath.Abs(filepath.Join(testDir, "test.txt"))
_ = file.Write(txtFile, "hello")
select {
case e := <-events:
if e.Type != watch.Create || e.Path != txtFile {
t.Errorf("expected create event for %s, got %v", txtFile, e)
}
case <-time.After(100 * time.Millisecond):
t.Fatal("timeout waiting for create event")
}
// 2. 测试排除类型
config2 := watch.Config{
Paths: []string{testDir},
ExcludeTypes: []string{".tmp"},
}
events2 := make(chan *watch.Event, 10)
w2, _ := watch.Start(config2, func(e *watch.Event) {
events2 <- e
})
defer w2.Stop()
tmpFile := filepath.Join(testDir, "test.tmp")
_ = file.Write(tmpFile, "temp")
select {
case e := <-events2:
t.Errorf("should not receive event for .tmp file, got %v", e)
case <-time.After(50 * time.Millisecond):
// OK
}
// 3. 测试模糊排除
config3 := watch.Config{
Paths: []string{testDir},
Excludes: []string{"node_modules", "*.log"},
}
events3 := make(chan *watch.Event, 10)
w3, _ := watch.Start(config3, func(e *watch.Event) {
events3 <- e
})
defer w3.Stop()
logFile := filepath.Join(testDir, "test.log")
_ = file.Write(logFile, "log")
nodeDir := filepath.Join(testDir, "node_modules")
_ = os.MkdirAll(nodeDir, 0755)
_ = file.Write(filepath.Join(nodeDir, "index.js"), "js")
select {
case e := <-events3:
t.Errorf("should not receive event for excluded path/file, got %v", e)
case <-time.After(50 * time.Millisecond):
// OK
}
}
func TestEasyStart(t *testing.T) {
testDir := "test_easy"
_ = os.RemoveAll(testDir)
_ = os.MkdirAll(testDir, 0755)
defer os.RemoveAll(testDir)
done := make(chan bool)
_, _ = watch.EasyStart(testDir, func(path string, et watch.EventType) {
if et == watch.Create {
done <- true
}
})
_ = file.Write(filepath.Join(testDir, "easy.txt"), "easy")
select {
case <-done:
// OK
case <-time.After(100 * time.Millisecond):
t.Fatal("timeout waiting for easy event")
}
}