Golang : Delete certain files in a directory



Tags : golang delete directory

Encounter a situation today where I need to delete some files in a directory. Not all files, but some files with certain pattern in their names. This code below will demonstrate how to scan a given directory and delete those unwanted files.

Let say I want to remove all files that have "dumb_" in their names and not others.

ls -la testdir/

total 0

drwxr-xr-x 5 sweetlogic staff 170 Oct 24 10:07 .

drwxr-xr-x+ 45 sweetlogic staff 1530 Oct 24 10:06 ..

-rw-r--r-- 1 sweetlogic staff 0 Oct 23 15:13 dumb3.txt

-rw-r--r-- 1 sweetlogic staff 0 Oct 23 15:13 dumb_1.txt

-rw-r--r-- 1 sweetlogic staff 0 Oct 23 15:13 dumb_2.txt

and the program code :

scandelete.go

 package main

 import (
 "flag"
 "os"
 "path/filepath"
 "strings"
 )

 var flagPath = flag.String("path", "", "path to walk in search for dumb_* files to delete.")

 func deletefiles(path string, f os.FileInfo, err error) (e error) {

 // check each file if starts with the word "dumb_"
 if strings.HasPrefix(f.Name(), "dumb_") {
 os.Remove(path)
 }
 return

 // See https://www.socketloop.com/tutorials/golang-delete-files-by-extension
 // on how to delete file by extension

 }

 func init() {
 flag.Parse()
 }

 func main() {

 // check if the user specify a path
 if *flagPath == "" {
 flag.Usage() // if no, prompt usage
 os.Exit(0) // and exit
 }

 // walk through the files in the given path and perform partialrename()
 // function
 filepath.Walk(*flagPath, deletefiles)
 }

result after executing this command ./scandelete -path="/Users/sweetlogic/testdir"

ls -la

total 0

drwxr-xr-x 3 sweetlogic staff 102 Oct 24 10:08 .

drwxr-xr-x+ 46 sweetlogic staff 1564 Oct 24 10:07 ..

-rw-r--r-- 1 sweetlogic staff 0 Oct 23 15:13 dumb3.txt

May you find this simple tutorial useful :-)



Tags : golang delete directory

By Adam Ng

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