ENV vars no longer working for specifying additional files

[kyounger]

Steps to reproduce (using latest from tapped rcmdnk/file):

0. (Deleted all previous homebrew configuration)
1. brew file init to create new Brewfile with current config in ~/.config/brewfile/
2. Add file ./${HOST}.Brewfile to the bottom of the created Brewfile
3. Move one of the brew xxx lines from Brewfile -> Host1.Brewfile
4. Ensure that the HOST env variable is exported in the env
5. Run brew file update

This seems to create a file in the same directory literally named ${HOST}.Brewfile, instead of picking up the configuration in the file named (for me) home.Brewfile.

[rcmdnk]

Thank you for the report.

I've updated brew-file to support environmental variables in Brewfile: v5.1.0.
Please try to update brew-file and do it.