How to Check if a File or Directory Exists in Go?

How to verify the existence of a file or directory in Go

In many programming scenarios, it becomes necessary to verify if a particular file or directory exists before proceeding with further operations. Go provides a simple and efficient way to perform this check.

To determine the existence of a file or directory, the os.Stat function can be leveraged. This function takes a path as its parameter and returns a FileInfo object which contains information about the file or directory.

To check for existence, the following code can be utilized:

import (
    "os"
)

func exists(path string) (bool, error) {
    _, err := os.Stat(path)
    if err == nil {
        return true, nil
    } else if os.IsNotExist(err) {
        return false, nil
    }
    return false, err
}

This function returns a boolean indicating the existence of the file or directory and an error if encountered. The usage of os.IsNotExist allows for distinguishing between non-existing files or directories and other potential errors that may arise during the stat operation.

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