Tree-Sitter grammar for E2

Installation for neovim

First, add the parser config:

return {
	"nvim-treesitter/nvim-treesitter",
	build = ":TSUpdate",
	config = function()
		local parser_config = require("nvim-treesitter.parsers").get_parser_configs()

		parser_config.e2 = {
			install_info = {
				url = "https://github.com/mrdgo/tree-sitter-e2.git", -- local path or git repo
				files = { "src/parser.c" }, -- note that some parsers also require src/scanner.c or src/scanner.cc
			},
		}
	end,
}

Then you can either add it to your ensure_installed list or simply run :TSInstall e2 in nvim.

In ~/.config/nvim/filetype.vim, I added a detection rule:

augroup FormatAutogroup
    autocmd!
    " NEW:
    autocmd BufRead,BufNewFile *.e2 set ft=e2
augroup END

After this, you need to tell neovim to use highlights. You need to add this file to your neovim's runtimepath. There are several options - I did it like so:

mkdir /usr/share/nvim/runtime/queries/e2
wget https://raw.githubusercontent.com/mrdgo/tree-sitter-e2/main/highlights.scm
mv highlights.scm /usr/share/nvim/runtime/queries/e2

Now, if you open a .e2 file, it should be highlighted.