- Added Tree-sitter grammars.
- Attempting to do so led to discovering how janky the previous setup was.
- Previous package "bootstrapping" process looked like
emacsPackage (The selected Emacs build from Nixpkgs)
↓
emacs-wrapper (My wrapper that set envvars and included external deps)
↓
programs.emacs.finalPackage (The package created by the HM module, which
included Nix-managed Emacs packages)
Now, we have
emacsBasePackage (The selected build from Nixpkgs)
↓
my-emacs (My wrapper that manages envvars, external packages, Nix-managed
Emacs packages, and everything else)
`programs.emacs.finalPackage` still exists, but it doesn't do anything that
`my-emacs` doesn't.
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