feat: file utils

filetools/filetools.go

@@ -0,0 +1,54 @@
+package filetools
+
+import (
+	"fmt"
+	"os"
+	"sort"
+	"time"
+)
+
+type FileInfo struct {
+	ModTime  time.Time
+	FileName string
+}
+
+func RecentFileMaxKept(dir string, maxKept int) error {
+
+	rd, err := os.ReadDir(dir)
+	if err != nil {
+		return err
+	}
+
+	all := make([]FileInfo, 0)
+
+	for _, entry := range rd {
+		if entry.IsDir() {
+			continue
+		}
+		info, err := entry.Info()
+		if err != nil {
+			return err
+		}
+		all = append(all, FileInfo{
+			ModTime:  info.ModTime(),
+			FileName: info.Name(),
+		})
+	}
+
+	sort.Slice(all, func(i, j int) bool {
+		return all[i].ModTime.Before(all[j].ModTime)
+	})
+
+	for i, fi := range all {
+		if i < maxKept {
+			continue
+		}
+		fn := fmt.Sprintf("%s%s%s", dir, string(os.PathSeparator), fi.FileName)
+		err := os.Remove(fn)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}

filetools/filetools_test.go

@@ -0,0 +1,10 @@
+package filetools
+
+import "testing"
+
+func TestMaxKept(t *testing.T) {
+	err := RecentFileMaxKept("./test", 2)
+	if err != nil {
+		t.Fatal(err)
+	}
+}