Use lua api instead of viml

[nullchilly]

vim.api.nvim_set_hl: Not sure why CompetiTestWarning default guifg is orange instead of hex color?

vim.api.nvim_create_autocmd replaced vim.cmd[[autocmd]]

vim.api.nvim_create_user_command Not sure why the ! modifier is necessary for command but I added bang = true via vim.tbl_extend 🤔

[nullchilly]

CompetiTest convert all I still want this space completion like Telescope's

https://github.com/nvim-telescope/telescope.nvim/blob/master/plugin/telescope.lua#L108-L143

vim.api.nvim_create_user_command("Telescope", function(opts)
  require("telescope.command").load_command(unpack(opts.fargs))
end, {
  nargs = "*",
  complete = function(_, line)
    local builtin_list = vim.tbl_keys(require "telescope.builtin")
    local extensions_list = vim.tbl_keys(require("telescope._extensions").manager)

    local l = vim.split(line, "%s+")
    local n = #l - 2

    if n == 0 then
      return vim.tbl_filter(function(val)
        return vim.startswith(val, l[2])
      end, vim.tbl_extend("force", builtin_list, extensions_list))
    end

    if n == 1 then
      local is_extension = vim.tbl_filter(function(val)
        return val == l[2]
      end, extensions_list)

      if #is_extension > 0 then
        local extensions_subcommand_dict = require("telescope.command").get_extensions_subcommand()
        return vim.tbl_filter(function(val)
          return vim.startswith(val, l[3])
        end, extensions_subcommand_dict[l[2]])
      end
    end

    local options_list = vim.tbl_keys(require("telescope.config").values)
    return vim.tbl_filter(function(val)
      return vim.startswith(val, l[#l])
    end, options_list)
  end,
})

Then we will be able to add more things like flags control without clutter the completion list

Work in progress. Something higher priority would be adding test cases completion list I guess