Is embed.FS not expected to be walkable by fs.WalkDir()?

[John]

package main

import (

"embed"

"io/fs"

"log"

)

//go:embed somefile.txt

var FS embed.FS

func main() {

  err := fs.WalkDir(

    FS,

    "",

    func(path string, d fs.DirEntry, err error) error {

      log.Println("path: ", path)

      return nil

    },

  )

  if err != nil {

    log.Println("err: ", err)

  }

}

This will output a single empty long line:

2021/06/20 22:32:29 path:  

d comes set to nil, which seems to be a valid condition according to the docs:

First, if the initial fs.Stat on the root directory fails, WalkDir calls the function with path set to root, d set to nil, and err set to the error from fs.Stat.

This seems like an undesirable outcome to be unable to walk the embed.FS, but I figure maybe it doesn't do so to only allow absolute paths for speed?

[Axel Wagner]

You need to pass "." to `fs.WalkDir`, not "".

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[John]

Thanks for that axel.  I had tried "./" and "/".  I guess I missed one :)