How one can test if a file exists in Go

If it is advisable test if a file exists utilizing Go, then you need to use one of many following strategies, relying on the model of Go you could be utilizing.

In case you are utilizing Go >=1.13, then

file, err := os.OpenFile("/path/to/file.txt")
if errors.Is(err, os.ErrNotExist) {
    // The file doesn't exists
}

Nonetheless, it’s also doable to lure an error from an OpenFile try:

file, err := os.OpenFile("/path/to/file.txt")
if os.IsNotExist(err) {
    // The file doesn't exists
}

You can too affirm if the trail can be not a listing as follows:

func fileExists(filename string) bool {
    data, err := os.Stat(filename)
    if os.IsNotExist(err) {
        return false
    }
    return !data.IsDir()
}