MimeMagic.by_magic returns nil for .txt text/plain files

[seanpanda0]

Im on mac and I did install the shared-mime-info via brew.

currently It is returning nil for plain text file.
I expect it to return text/plain.

$ ruby --version
ruby 2.7.6p219 (2022-04-12 revision c9c2245c0a) [x86_64-darwin21] 
$ file --mime-type sample.txt
sample.txt: text/plain
$ file --mime-type sample.png
sample.png: image/png

irb

> require 'mimemagic'
 => true
> MimeMagic::VERSION
 => "0.4.3"
> MimeMagic.by_magic(File.open('sample.txt'))&.type
 => nil
> MimeMagic.by_magic(File.open('sample.png'))&.type
 => "image/png"

[seanpanda0]

ok I see #57

and

Invalid, this should be fixed in the shared-mime-info database upstream.
Originally posted by @minad in #57 (comment)

Instead of closing this right away because its invalid, could we create a issue on shared-mime-info and link it here?
Im not seeing an existing one that is obviously related to this issue.

Perhaps: https://gitlab.freedesktop.org/xdg/shared-mime-info/-/issues/91 but that was closed years ago.

https://freedesktop.org/wiki/Software/shared-mime-info/
https://gitlab.freedesktop.org/xdg/shared-mime-info/-/issues

I don't really have the specialty knowledge about detecting file types to really even be confident about creating a ticket on the shared-mime-info database. Otherwise I would do that.