How can I convert Vim keymap to lua?

Question

Hi I am using AstroNvim.

Copilot help give me the following instruction about desired keybindings:

imap <silent><script><expr> <C-J> copilot#Accept("\<CR>")
let g:copilot_no_tab_map = v:true

In AstroNvim I have a file mappings.lua, and inside keybindings, but for copilot keybinding don't work.

return {
  n = {
    ["b"] = { "<Plug>Sneak_S", desc = "Sneak back" },
    ["<M-l>"] = { ":wa<CR>", desc = "close all" },
    ["<leader>;"] = { ":vsplit<CR>", desc = "split" },
    ["<S-l>"] = {
      function() require("astronvim.utils.buffer").nav(vim.v.count > 0 and vim.v.count or 1) end,
      desc = "Next buffer",
    },
    ["<S-h>"] = {
      function() require("astronvim.utils.buffer").nav(-(vim.v.count > 0 and vim.v.count or 1)) end,
      desc = "Previous buffer",
    },
  },
  i = {
    ["<C-t"] = { "<cmd>copilot#Accept('<CR>')", desc = "copilot expand", silent = true },
  },
}


-- imap <silent><script><expr> <C-J> copilot#Accept("\<CR>")
-- let g:copilot_no_tab_map = v:true

When I type something in code, I see copilot completions, but Ctrl t don't work. Also :verbose <C-t> don't show anything, I don't have this key bonded.

Answer 1

It seems to me that you miss:

• The closing > of <C-t>.
• The escaped backslash \\
• The script and expr options needs to be set to match the recommendation

I would do:

return {
  n = {
    ["b"] = { "<Plug>Sneak_S", desc = "Sneak back" },
    ["<M-l>"] = { ":wa<CR>", desc = "close all" },
    ["<leader>;"] = { ":vsplit<CR>", desc = "split" },
    ["<S-l>"] = {
      function() require("astronvim.utils.buffer").nav(vim.v.count > 0 and vim.v.count or 1) end,
      desc = "Next buffer",
    },
    ["<S-h>"] = {
      function() require("astronvim.utils.buffer").nav(-(vim.v.count > 0 and vim.v.count or 1)) end,
      desc = "Previous buffer",
    },
  },
  i = {
    ["<C-t>"] = { "copilot#Accept('\\<CR>')", desc = "copilot expand", silent = true, expr = true, script = true },
  },
}

-- imap <silent><script><expr> <C-J> copilot#Accept("\<CR>")
-- let g:copilot_no_tab_map = v:true