golang determines whether it is a directory

In the Go language, it is very simple to determine whether a path is a directory. The os package in the standard library provides the function IsDir, which can be used to determine whether a path is a directory.

The usage is as follows:

package main

import (
    "fmt"
    "os"
)

func main() {
    path := "/path/to/directory"

    fileInfo, err := os.Stat(path)
    if err != nil {
        fmt.Println(err)
        return
    }

    if fileInfo.IsDir() {
        fmt.Println(path, "is a directory.")
    } else {
        fmt.Println(path, "is not a directory.")
    }
}

In the above code, the os.Stat function is used to obtain the FileInfo object of the specified path. FileInfo The object contains some metadata information, such as file size, creation time, etc. Use the IsDir method to determine whether the path is a directory, and if so, output the corresponding information.

It should be noted that when using the os.Stat function, errors such as file non-existence and insufficient permissions may occur, and corresponding error handling is required.

In addition to the os.Stat function, you can also use the os.Stat function with the Walk in the filepath package Or the WalkDir function traverses the files in the directory and determines whether each file is a directory. The code is as follows:

package main

import (
    "fmt"
    "os"
    "path/filepath"
)

func main() {
    path := "/path/to/directory"

    err := filepath.WalkDir(path, func(path string, info os.DirEntry, err error) error {
        if err != nil {
            fmt.Println(err)
            return err
        }

        if info.IsDir() {
            fmt.Println(path, "is a directory.")
        } else {
            fmt.Println(path, "is not a directory.")
        }

        return nil
    })

    if err != nil {
        fmt.Println(err)
    }
}

The above code uses the WalkDir function to traverse the files in the specified directory. func(path string, info os.DirEntry, err error) error is used A function for processing each file, where the info object is file-related information, and IsDir is used to determine whether it is a directory. Note that this function returns a value of type error. If an error occurs, it needs to be handled accordingly.

Whether you use os.Stat or WalkDir, it is very convenient to determine whether the path is a directory. If you need to further operate the directory, such as creating a directory, deleting a directory, etc., you can also use the corresponding functions provided by the os package.

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