How can I execute a non named file on terminal with NeoVIm?

Question

Some time ago, I've made this question where I asked how to execute a file on the terminal with NeoVim... The solution I found was the following :terminal bash % . Knowing that, I made the following configuration on my init.vim file:

function! ExecuteOnTerminal(type) range
    if (&ft=='javascript')
        if a:type == "V"
            :vert botright '<,'> terminal node %
        else
            :vert botright terminal node %
        endif
    elseif (&ft=='sh')
        if a:type == "V"
            :vert botright '<,'> terminal bash %
        else
            :vert botright terminal bash %
        endif
    elseif (&ft=='python')
        if a:type == "V"
            :vert botright '<,'> terminal python3 %
        else
            :vert botright terminal python3 %
        endif
    endif
endfunction

vnoremap <silent> <F6> :call ExecuteOnTerminal("V")<CR>
nnoremap <silent> <F6> :call ExecuteOnTerminal("I")<CR>

The above configuration works perfectly fine, it allows me to execute a file with bash, node.js and python when I press F6... And if I select some lines and press F6 it`ll execute only the selected lines.

The problem is that in my context, I need to execute files that are not stored on the disk. Let's say I have the following file.sh:

echo "Hello World"

I need to open this file with cat file.sh | nvim - (not nvim file.sh)... When I do that, if I try using the command :vert botright terminal bash % I receive the error:

E499: Empty file name for '%' or '#', only works with ":p:h"

I tried using set ft=sh but it didn't work as well. Is there any workaround for this problem? In a way that I don't need to save this file on the disk to execute it with nvim?

---

Observation: With vim, I have a similar configuration in my vimrc file, the only difference is that I use the commands :vert botright '<,'> %terminal bash and vert botright %terminal bash instead. With vim it works perfectly fine to execute files opened from pipe. Like in cat file.sh | vi -. This issue only exists on NeoVim.

Answer 1

I managed to solve this problem by creating the following vimscript:

function! ExecuteOnTerminal(type) range
    if (&ft=='javascript')
        if a:type == "V"
            '<,'>w! /tmp/file.js
        else
            :w! /tmp/file.js
        endif
        :vert sp | terminal node /tmp/file.js  
        call system('xdotool key "Control_L+w" ; xdotool type r')
    elseif (&ft=='bash' || &ft=='sh')
        if a:type == "V"
            '<,'>w! /tmp/file.bash
        else
            :w! /tmp/file.bash
        endif
        :vert sp | terminal bash /tmp/file.bash
        call system('xdotool key "Control_L+w" ; xdotool type r')
    elseif (&ft=='python')
        if a:type == "V"
            '<,'>w! /tmp/file.py
        else
            :w! /tmp/file.py
        endif
        :vert sp | terminal python3 /tmp/file.py
        call system('xdotool key "Control_L+w" ; xdotool type r')
    endif
endfunction

vnoremap <silent> <F6> :call ExecuteOnTerminal("V")<CR>
nnoremap <silent> <F6> :call ExecuteOnTerminal("I")<CR>

In this solution, a temporary file with the content of the file was created.

I wanted to make NeoVim behavior exactly the same as Vim, so I've also used xdotool from the system to press Ctrl+w and r to switch sides of the terminal window. The logic here is writing a temporary file with its extension in /tmp and then executing it with terminal language /tmp/file.extension. The result on NeoVim after pressing F6 is: