Golang : Check if directory exist and create if does not exist
Anyway, need to modify an existing Golang program for a friend. The original developer left her company and basically, she needs the program to check if a directory/folder exist or not. If it is not there, create the folder and also need to report if and why the directory creation failed.
Below is a function that should check if a directory exists and create one if it does not exist.
Here you go!
package main
import (
"fmt"
"os"
)
func createDirectory(dirName string) bool {
src, err := os.Stat(dirName)
if os.IsNotExist(err) {
errDir := os.MkdirAll(dirName, 0755)
if errDir != nil {
panic(err)
}
return true
}
if src.Mode().IsRegular() {
fmt.Println(dirName, "already exist as a file!")
return false
}
return false
}
func main() {
if len(os.Args) != 2 {
fmt.Printf("Usage : %s <directory>\n", os.Args[0])
os.Exit(0)
}
directory := os.Args[1]
result := createDirectory(directory)
fmt.Println(directory, "created : ", result)
}
Sample output:
$ ./createdirifnotexist
Usage : ./createdirifnotexist
$ ./createdirifnotexist webserver
webserver already exist as a file!
webserver created : false
$ ./createdirifnotexist webserver2
webserver2 created : true
$ ./createdirifnotexist webserver2
webserver2 created : false
$ rm -rf webserver2
$ ./createdirifnotexist webserver2
webserver2 created : true
Happy coding!
References:
https://golang.org/pkg/os/#IsNotExist
https://www.socketloop.com/tutorials/golang-check-if-a-directory-exist-in-go
See also : Golang : Determine if directory is empty with os.File.Readdir() function
By Adam Ng
IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.
Advertisement
Tutorials
+5.5k Swift : Get substring with rangeOfString() function example
+27.2k Golang : Convert integer to binary, octal, hexadecimal and back to integer
+11.5k Golang : GTK Input dialog box examples
+7.4k Golang : Mapping Iban to Dunging alphabets
+20.8k Golang : Clean up null characters from input data
+24.8k Golang : Generate MD5 checksum of a file
+6.1k Golang : Test input string for unicode example
+19.7k Golang : Reset or rewind io.Reader or io.Writer
+5.1k Golang : How to deal with configuration data?
+7.6k Javascript : How to check a browser's Do Not Track status?
+5.4k Fix fatal error: evacuation not done in time problem
+13.2k Golang : Get constant name from value