通过另一个文件导入时，仅使用ioutils ReadDir扫描当前目录中的文件

Question

I'm having an issue with ioutils.ReadDir, for some reason it's scanning for all files in the project root instead of in the current directory only.

./main.go

import (
    "myfolder/myfile"
)

func main() {
    myfile.MyFunction()
}

./myfolder/myfile.go

package myfile

func MyFunction() {
    files, err := ioutil.ReadDir(".")
    if err != nil {
        log.Fatal(err)
    }

    for _, f := range files {
        fi, err := os.Stat(f.Name())
        if err != nil {
            log.Fatal(err)
            return
        }

        switch mode := fi.Mode(); {
        case mode.IsDir():
            fmt.Printf("%#s  is a folder
", f.Name())
        case mode.IsRegular():
            fmt.Printf("%#s is a file
", f.Name())
        }
    }
}

I'm not really sure why it is behaving like this, I'm new to Go. My guess is because it's being imported through main.go. How can I make it only search for folders and files in ./myfolder?

Answer 1

The current directory is not the directory of the source files, but rather the current directory of whoever executes the program.

If you're executing the program from a shell (be it bash or the Windows command line), the program inherits the current directory from your shell.

You must change the current directory with cd myfolder before executing the program or call os.Chdir("myfolder") in your Go source file. (os.Chdir doesn't affect your shell's current directory)

If you want to list a directory recursively, you must walk it. See filepath.Walk.