How do I re-build the formula against latest master?

[sankalp-khare]

My local setup is like:

❯ brew info emacs-plus@28
d12frosted/emacs-plus/emacs-plus@28: stable 28.0.50
/usr/local/Cellar/emacs-plus@28/28.0.50 (4,045 files, 133MB) *
  Built from source on 2021-02-20 at 00:22:53 with: --with-modern-black-dragon-icon
From: https://github.com/d12frosted/homebrew-emacs-plus/blob/HEAD/

Q: Where does the 28.0.50 in the install location path come from, and if I uninstall + re-install today, will I get a newer version number over there instead?

The link in the From: section 404s, but I do see that the master branch of this repo has seen lots of commits since the install date in February 2021.

What is the recommended command / approach to get brew to install the newer version of emacs-plus@28 from the latest master branch of the formula repo, if available. Is this the correct way to think about this?

❯ brew install emacs-plus@28 --with-modern-black-dragon-icon
Updating Homebrew...
==> Auto-updated Homebrew!
Updated 2 taps (homebrew/core and homebrew/cask).
==> Updated Formulae
Updated 2 formulae.
==> New Casks
vitalsigns
==> Updated Casks
Updated 6 casks.

Warning: d12frosted/emacs-plus/emacs-plus@28 28.0.50 is already installed and up-to-date.
To reinstall 28.0.50, run:
  brew reinstall emacs-plus@28

Should I issue a reinstall command as brew suggests above?

Thanks!

[d12frosted]

In general, you should not use reinstall command even though brew suggests so, see README.

Version for emacs-plus@28 is hard-coded, because there is no way brew can infer this as it does with emacs-plus@27 (see url) or emacs-plus@26 (see url), because Emacs 28 was not released yet, it's a bleeding edge without any release candidates, so you simply build against master.

In order to get the latest version you need to do as readme suggests - uninstall and then install again, which simply pulls the latest changes from Emacs upstream mirror (see url in formula). emacs-plus repository does not contain sources of Emacs :) It's just a formula.

Hope that helps.

P. S. Oh nice, I thought they changed UI of issue tracker, but instead you used discussions! 💯