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w.go
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w.go
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package main
import (
"log"
"os"
"path/filepath"
"strings"
"github.com/fsnotify/fsnotify"
)
func scan(path string) ([]string, error) {
var folders []string
folder, err := os.Open(path)
if err != nil {
return nil, err
}
stat, err := folder.Stat()
if err != nil {
return nil, err
}
// path can be a file
if !stat.IsDir() {
return folders, nil
}
defer folder.Close()
files, err := folder.Readdir(-1)
if err != nil {
panic(err)
}
for _, fi := range files {
// skip all dot files/folders
if fi.Name()[0] == '.' {
continue
}
if fi.IsDir() {
folders = append(folders, path+"/"+fi.Name())
subfolder, err := scan(path + "/" + fi.Name())
if err != nil {
panic(err)
}
folders = append(folders, subfolder...)
}
}
return folders, nil
}
func watchDirs(dirs, exts string, restart chan bool) {
watcher, err := fsnotify.NewWatcher()
if err != nil {
log.Fatal(err)
}
defer watcher.Close()
if dirs == "" {
dirs = "."
}
allDirs := strings.Split(dirs, ",")
for _, dd := range allDirs {
path, err := filepath.Abs(dd)
if err != nil {
log.Fatal(err)
}
if err = watcher.Add(path); err != nil {
log.Fatal(err)
}
folders, err := scan(path)
if err != nil {
log.Fatal(err)
}
for _, f := range folders {
if err = watcher.Add(f); err != nil {
log.Fatal(err)
}
}
}
allExts := strings.Split(exts, ",")
for {
select {
case event := <-watcher.Events:
if len(allExts) > 0 {
for _, ext := range allExts {
if strings.HasSuffix(event.Name, ext) {
restart <- true
break
}
}
} else {
restart <- true
}
case err := <-watcher.Errors:
log.Println("error:", err)
}
}
}