Mappings and basic REPL for Neovim's :term

nvim-term-maps.vim

" Term bindings
"
" Spawns
" open shell on the current window
nnoremap <c-t><c-e> :e term://$SHELL<CR>A
" open vertical shell
nnoremap <c-t><c-v> <c-w><c-v><c-w><c-l>:e term://$SHELL<CR>A
" open horizontal shell
nnoremap <c-t><c-s> <c-w><c-s><c-w><c-j>:e term://$SHELL<CR>A
"
" terminal options
au! TermOpen * call OnTermOpen()
au! TermClose * call OnTermClose()
function! OnTermOpen()
    " show line numbers
    setlocal relativenumber number
    " highlight current line
    setlocal cursorline
    " tmux navigator fix
    nnoremap <buffer> <silent> <BS> :TmuxNavigateLeft<CR>
    " terminal job id for the REPL
    let g:terminal_id = b:terminal_job_id
endfunction
function! OnTermClose()
    " clear the terminal job reference
    let g:terminal_id = 0
endfunction
let g:terminal_id = 0
"
" enter normal mode while on a terminal
" and go to the last prompt
tnoremap <silent> <esc> <c-\><c-n>:call MoveToLastPrompt()<CR>
function! MoveToLastPrompt()
    " move to the end ef the line and
    " search for any non-empty caracter
    $?.
    " move to the end of the prompt
    normal! $l
endfunction
"
" REPL
function! SendLinesToREPL(lines)
    if g:terminal_id
        call jobsend(g:terminal_id, add(a:lines, ''))
    else
        echo "Can't find any open terminals"
    endif
endfunction
nnoremap <expr> <silent> <leader>sl SendLinesToREPL([getline('.')])
vnoremap <expr> <silent> <leader>sl SendLinesToREPL(getline(line('v'), line('.')))