ToggleTermSendCurrentLine and ToggleTermSendVisualSelection for Snacks.terminal

[LintaoAmons]

Those two function is super useful when I want to send lines to terminal
in markdown files
or random lines in a bash file
or languages REPL

[kunzaatko]

You can use this as a starting point. The important part is that you can send anything to the terminal over a channel with vim.b[repl.buf].terminal_job_id being the channel id. Then you have to create a command in your other buffers that use this id to send text from the selection to the terminal. I do this from the buffer that I created the terminal from. (send_key is only a parameter that I passed to the parent function of this block that I toggle the REPL with. I use ¶, that is <alt-r> on my keyboard)

local buf = vim.api.nvim_get_current_buf()
local repl = term.toggle(cmd, vim.tbl_deep_extend('keep', opts, repl_opts))
if send_key then
  vim.keymap.set('v', send_key, function()
    vim.schedule(function()
      vim.api.nvim_chan_send(vim.b[repl.buf].terminal_job_id, table.concat(visual.get_vsel_text(), '\n') .. '\n')
      visual.exit_vmode()
    end, { desc = 'Send visual selection to REPL', buffer = buf })
  end)
end

I have visual.get_vsel_text function defined as

--- Returns the text selected in visual mode in the current buffer.
--- @return string[]: The text selected in visual mode in the current buffer as a list of lines. You can call
--- `table.concat` to get the true text of the selection.
function M.get_vsel_text()
  local vsel = M.get_vsel()
  local pos = vsel.pos
  if vsel.mode == 'v' then
    return vim.api.nvim_buf_get_text(0, pos[1] - 1, pos[2] - 1, pos[3] - 1, pos[4], {})
  elseif vsel.mode == 'V' then
    return vim.api.nvim_buf_get_lines(0, pos[1] - 1, pos[3], true)
  end
  error('Invalid mode: ' .. vsel.mode, 2)
end

and visual.exit_vmode defined as

function M.exit_vmode()
  local esc = vim.api.nvim_replace_termcodes('<esc>', true, false, true)
  vim.api.nvim_feedkeys(esc, 'x', false)
end

Good luck! I can answer any questions that you may have.