Workaround for 'poetry shell' breaking shell integration

[MajorDallas]

I don't think this is a bug in either kitty (0.32.2) or Poetry (v1.6.1), just one of those things where two bits of software don't play nicely together.

This started when I enabled shell_integration for the first time. I maintain several Python projects that use Poetry, and I pretty much always start the day with cd the_project; poetry shell. With kitty's shell integration, I started getting this error after every command:

_ksi_get_current_command: command not found

Mostly, it's just terminal spam--nothing bad happens. However, I observed that the scroll_to_prompt and show_last_command_output actions didn't work right. scroll_to_prompt -1 would always take me back to the poetry shell line, and show_last_command_output showed everything since that command.

After some more reading of kitty's docs, I changed the invocation to

kitten run-shell --shell='poetry shell'

This helps. The 'command not found' error still prints every time, but show_last_command_output now shows the last command's output as expected. scroll_to_prompt -1 still goes all the way back to poetry shell, though. I suspect Poetry's use of the Pexpect library is what's causing the trouble, but I'm not particularly interested in finding out right now.

Yet more reading of the docs prompted me to try manually enabling shell integration after starting poetry shell. That finally got scroll_to_prompt -1 working as expected, also.

In the end, to make shell integration work with poetry shell (and possibly any other Pexpect-managed shell environments? or any interactive subshell?):

cd poetry_project
kitten run-shell --shell='poetry shell'
export KITTY_SHELL_INTEGRATION="enabled"
source "$KITTY_INSTALLATION_DIR/shell-integration/bash/kitty.bash"

This all might be irrelevant to people who actually keep Poetry up to date, since it now has the poetry env activate command that seems to work more like a traditional venv? Anyway, wanted to share in case anyone else runs into a similar issue.