Running bubbletea apps inside vim gives bad output

[caarlos0]

Being experimenting with running bubbletea programs inside vim/neovim using :!app, here's what I've found:

Problem 1: stdin and opening a tty

If you don't pass a WithInput option, bubbletea will fallback to /dev/stdin, which is OK, but then it'll try to open a new tty, which fails inside vim.

Passing WithInput(nil) fixes the issue.

Problem 1.2: WithInput(os.Stdin)

If instead of a nil input, you pass os.Stdin directly, you get a even weirder error:

:!go run .
^[[?25lcould not run program: error creating cancelreader: add reader to epoll interest list
exit status 1

shell returned 1

Problem 2: ansi escape codes in output

Ok, let's keep the WithInput(nil), if you then run the program from within vim, you'll get ansi escape code sequences all over the place:

:!go run .
^[[?25l
 / Spinning...

h/l, ←/→: change spinner • q: exit
                                  ^[[0D^[[1A^[[1A^[[1A^[[2K^[[1A^[[0D^[[2K
 - Spinning...
^[[1B^[[1B^[[0D^[[1A^[[1A^[[1A^[[2K^[[1A^[[0D^[[2K
 \ Spinning...
^[[1B^[[1B^[[0D^[[1A^[[1A^[[1A^[[2K^[[1A^[[0D^[[2K
 | Spinning...
^[[1B^[[1B^[[0D^[[1A^[[1A^[[1A^[[2K^[[1A^[[0D^[[2K
 / Spinning...
^[[1B^[[1B^[[0D^[[1A^[[1A^[[1A^[[2K^[[1A^[[0D^[[2K

To be honest, that seems to happen with other things too, e.g., fish shell:

:!echo (set_color --bold magenta) "Hello world"
^[[1m^[[35m Hello world

Press ENTER or type command to continue

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Footnotes

• Lipgloss examples seem to work properly
• Termenv examples also print the escape codes, so maybe the problem is there?
• I think the biggest real bugs here involve setting the input, not sure what the right behavior should be though

[caarlos0]

some screenshots, fwiw:

gum

mods

lipgloss example

bubbletea example

bubbletea example (modified, nil input)

termenv example