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Go has many ways to create directories, one of which is os.Mkdir. We can assign specified names and permission bits to the newly formed directory.

os.MkdirAllUseful for recursively creating multiple directories, including any missing parent directories.

Permission modes for os.Mkdir and os.MkdirAll

User Access

General permissions

• 0664: Only the owner can read and write the file. Other users can only read the file.
• 0600: Only the owner can read and write the file; others cannot access it.
• 0777: All users have full access to the file.
• 0755: Only the owner has full access rights, other users can only view and execute the file.
• 0666: Read and write permissions for all file users.
• 0750: The file owner can read, write, and execute, but the user can only read and execute.

Using os.Mkdir() Method in Go

package main

import (
    "log"
    "os"
    "fmt"
)

func main() {

    error := os.Mkdir("HomeDir", 0750)

    if error != nil && !os.IsExist(error) {

        log.Fatal(error)

    }

    fmt.Print("The directory has been created successfully.")

}

Output:

The directory has been created successfully.

The above code allows us to create a new directory. If there is an error while creating the new directory, it will be of type PathError.

os.Mkdir function creates only one directory. We can create subdirectories using this function.

Using os.MkdirAll() Method in Go

package main

import (
    "log"

    "os"

    "fmt"
)

func main() {
    DirPath := "Desktop/Documents/MyDirectory"

    err := os.MkdirAll(DirPath, os.ModePerm)

    if err != nil {

        log.Println(err)

    }

    fmt.Print("The directory has been created successfully.")
}

Output:

The directory has been created successfully.

The ability to create multiple directories with a single command is helpful. Missing parent directories are automatically made, avoiding the redundancy of writing new directory code.