origin

.gitignore

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+# Compiled source #
+###################
+*.com
+*.class
+*.dll
+*.exe

1397#1.txt

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+11

1609#2.txt

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+2

810#1.txt

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+1

arename.cmd

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+arn "." ".txt"

main.go

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+// Copyright 2018 softlandia@gmail.com
+// auto random files renamer
+
+package main
+
+import (
+	"fmt"
+	"log"
+	"math/rand"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"github.com/softlandia/xLib"
+)
+
+const num int = 5000
+
+func fileTrust(ext, path string, i os.FileInfo) bool {
+	if i.IsDir() { //skip dir
+		return false
+	}
+	if filepath.Ext(path) != ext { //skip files with extention not equal extFileName
+		return false
+	}
+	if !xLib.FileExists(path) {
+		return false
+	}
+	return true
+}
+
+func arn(n int, path, extFileName string) (int, error) {
+	log.Println("start rename")
+	log.Printf("max file count: %v\n", n)
+	log.Println("file name mask: " + extFileName)
+
+	r := rand.New(rand.NewSource(int64(time.Now().Second()) + int64(time.Now().Minute())))
+	i := 0 //index founded files
+	err := filepath.Walk(".", func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			log.Printf("prevent panic by handling failure accessing a path %q: %v\n", path, err)
+			return err
+		}
+		if !fileTrust(extFileName, path, info) {
+			return nil
+		}
+		//file found
+		i++
+		dir := filepath.Dir(path)
+		if dir == "." {
+			dir = ""
+		}
+		fileName := info.Name()
+		if strings.Contains(fileName, "#") {
+			j := strings.Index(fileName, "#") + 1
+			fileName = fileName[j:]
+		}
+
+		newPath := dir + fmt.Sprintf("%v#%s", r.Int31n(int32(n)), fileName)
+		fmt.Printf("%s\n", newPath)
+		os.Rename(path, newPath)
+		return nil
+	})
+	return i, err
+}
+func main() {
+	log.Println("program start")
+	log.Println("> arn \"x:\\music\" \".mp3\"")
+	log.Println(arn(5000, os.Args[1], os.Args[2]))
+}