nvim/after/plugin/treesitter.lua

local configs = require("nvim-treesitter.configs")

local f = io.popen("uname -s")
if (f ~= nil) then
    MY_OS = f:read("*a")
    MY_OS = string.gsub(MY_OS, "%s+", "")
    f:close()
end

if (MY_OS == 'Linux')
then
    configs.setup({
        ensure_installed = {
            "bash",
            "c",
            "json",
            "julia",
            "lua",
            "vim",
            "vimdoc",
            "zig",
        },
        sync_install = false,
        highlight = { enable = true },
        indent = { enable = true },
    })
elseif (MY_OS == 'FreeBSD') or (MY_OS == 'OpenBSD')
then
    --print('Should be here if on BSD')
    configs.setup({
        ensure_installed = {
            "bash",
            "c",
            "json",
            "vim",
            "vimdoc",
            "zig",
        },
        sync_install = false,
        highlight = { enable = true },
        indent = { enable = true },
    })
elseif (MY_OS == 'Darwin')
then
    --print('Should be here if on MacOS')
    configs.setup({
        ensure_installed = {
            "bash",
            "c",
            "julia",
            "json",
            "lua",
            "ocaml",
            "vim",
            "vimdoc",
            "zig",
        },
        sync_install = false,
        highlight = { enable = true },
        indent = { enable = true },
    })
else
    print('Should never be here')
end