File size: 867 Bytes
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package main
import (
"os"
"path/filepath"
"sort"
"strconv"
"strings"
)
type Watcher struct {
p []string
state string
}
func calcTree(patterns []string) string {
var files []string
for _, p := range patterns {
f, err := filepath.Glob(p)
if err != nil {
continue
}
files = append(files, f...)
}
sort.Strings(files)
var t strings.Builder
for _, f := range files {
info, err := os.Stat(f)
if err != nil {
continue
}
t.WriteString(f + "\n")
t.WriteString(info.ModTime().String() + "\n")
t.WriteString(strconv.FormatInt(info.Size(), 10) + "\n")
}
return t.String()
}
func (w *Watcher) Changed() bool {
tree := calcTree(w.p)
if tree == w.state {
return false
}
w.state = tree
return true
}
func Watch(patterns []string) *Watcher {
sort.Strings(patterns)
return &Watcher{p: patterns, state: calcTree(patterns)}
}
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