Search for directory named BigZoom and list contents.

[Adam C]

I'm trying to come up with a fairly small script to find a directory and then list the contents of a given directory name.

The filestructure is thus:

/root/1/1

/root/1/2

/root/1/BigZoom

/root/1/BigZoom/1

/root/2/1

/root/2/2

/root/2/BigZoom

/root/2/BigZoom/1

I want to find any file in a directory named BigZoom. I'm new to Go, but thought I'd give it a go.

I use filepath.WalkDir in this code https://play.golang.org/p/ivqA7o2nCCs - it seems that my problem is passing a fileinfo.Name to ReadDir. What should go on line 25 for the ReadDir call? I thought I could pass in a string, but I'm getting:

panic: open BigZoom: no such file or directory

Any help would be much appreciated - thanks in advance.

Adam

[Martin Schnabel]

hi Adam,

you call ReadDir with the file name and not with the full path or the
path relative to your current working directory. that means you will try
to read the dir with path "BigZoom" two times. the WalkDirFunc passes a
path argument that concatenates the path prefix with the dir entry name
to form the whole path you can use to read the file.

https://play.golang.org/p/76GxS3TRkha

not locally tested with files, but i hope it shows what i mean.

have fun

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[Adam]

Hi Kurt - many thanks. I got it - I switched it to pass in the var 'p' instead of info.Name() and it works.

Adam

On Mon, 10 May 2021 at 04:19, Kurtis Rader <kra...@skepticism.us> wrote:

Hint #1: Note that fs.DirEntry.Name() only contains the final component of the path: https://golang.org/pkg/io/fs/#DirEntry.

Hint #2: Note that fs.WalkDirFunc()'s first argument is the full path to the directory entry: https://golang.org/pkg/io/fs/#WalkDirFunc. See the example for the older fs.Walk() function: https://golang.org/pkg/path/filepath/#example_Walk.

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Kurtis Rader

Caretaker of the exceptional canines Junior and Hank

[Kurtis Rader]

Hint #1: Note that fs.DirEntry.Name() only contains the final component of the path: https://golang.org/pkg/io/fs/#DirEntry.

Hint #2: Note that fs.WalkDirFunc()'s first argument is the full path to the directory entry: https://golang.org/pkg/io/fs/#WalkDirFunc. See the example for the older fs.Walk() function: https://golang.org/pkg/path/filepath/#example_Walk.

On Sun, May 9, 2021 at 7:53 PM Adam C <ad...@monkeez.org> wrote:

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