A Github Action that installs a specific emacs version

Uses nix-emacs-ci to provide binaries for a number of different Emacs versions.

Since that project uses Nix, Nix will be installed automatically if necessary.

Note also that only Linux and MacOS are supported, since Nix is not available on Windows.

See the actions tab for runs of this action! 🚀

Usage:

uses: purcell/setup-emacs@master
with:
  version: 24.5

The emacs executable on the path will then be the requested version. For a list of available versions, please see the nix-emacs-ci project.

For an example of real-life usage, see the Actions config for package-lint.

Here's an example of a project which compiles binary modules against an Emacs installed with this method.