Use $XDG_DATA_DIRS to find the freedesktop.org.xml

[toastal]

I'm on NixOS and while I'm used to stuff breaking by now, the $XDG_DATA_DIRS is a standard for finding these types of directories. Included in my list for $XDG_DATA_DIRS is

$ ls ~/.nix-profile/share/mime/packages/                                              
freedesktop.org.xml  hugin.xml
$ ls /run/current-system/sw/share/mime/packages/                                      
freedesktop.org.xml
$ ls /nix/store/c20brs4h56nx8wp6ky86yh5pbhck2j6d-shared-mime-info-1.13.1/share/mime/packages/
freedesktop.org.xml

which all show that I have this file on my system.

The project is literally called xdg/shared-mime-info.

[toastal]

If it helps anyone as a workaround using Nix with Ruby in a nix-shell, you can add this

# shell.nix
{ pkgs }:

pkgs.mkShell {
  nativeBuildInputs = with pkgs.buildPackages; [
    ruby_2_7
    bundler
  ];

  FREEDESKTOP_MIME_TYPES_PATH = "${pkgs.shared_mime_info}/share/mime/packages/freedesktop.org.xml";
}

Which will provide the environment variable to the shell so bundler can install and use mimemagic from a Gemfile.

[bobvanderlinden]

Ran into this as well and found this issue. Thanks a lot for the suggestion. Using XDG_DATA_DIRS seems like a good practice for mimemagic to follow.

[bobvanderlinden]

Made a PR: #163