Fail to switch panes when inside a python virtual environment

[vvatikiotis]

When in tmux and from there on inside a python virtual directory, nvim fails to navigate from nvim pane to nvim pane. According to #230 (comment) this should be easy to triage and fix?

Also found a somewhat similar solution, in an issue here: 7db70e0

Thanks!

[christoomey]

Did you check any of the items in the troubleshooting list in the README? I'm guessing the most relevant would be the section on the process list.

[vvatikiotis]

That's what TmuxNavigatorProcessList reports when inside a python poetry virtual environment:

Ss   -zsh
S+   /Users/<username>/Library/Application Support/pypoetry/venv/bin/python

I'll fiddle with it and hopefully post a solution here. Thanks!

[tfriedel]

The issue is the ps command in "is_vim" can not find nvim because it's a subprocess of the command that created the virtualenv (e.g. poetry or pixi) and has different TTY.
So we need check also the subprocesses as well. I asked ChatGPT to write a script that does it.

Modify is_vim in tmux.conf:
is_vim="~/.tmux/check_vim.sh"

Then create ~/.tmux/check_vim.sh and chmod +x it.

check_vim.sh:

#!/usr/bin/env bash

# Get the current TTY from tmux
current_tty=$(tmux display-message -p '#{pane_tty}')
current_tty=${current_tty#/dev/} # Remove '/dev/' prefix

# Get the PIDs of processes associated with the current TTY
pids=$(ps -o pid= -t "$current_tty")
pids=($(echo "$pids")) # Convert to an array

# Initialize a set of all descendant PIDs
all_pids=("${pids[@]}")

# Initialize the list of PIDs to process
to_process=("${pids[@]}")

# Loop to find all descendant processes iteratively
while [ ${#to_process[@]} -gt 0 ]; do
  # Get the child PIDs of the current PIDs
  child_pids=$(ps --no-headers -o pid= --ppid $(
    IFS=','
    echo "${to_process[*]}"
  ))
  # Remove leading/trailing whitespace and convert to array
  child_pids=($(echo "$child_pids"))
  # Break the loop if no more child processes are found
  if [ ${#child_pids[@]} -eq 0 ]; then
    break
  fi
  # Add child PIDs to the set of all_pids
  all_pids+=("${child_pids[@]}")
  # Update to_process with the new child PIDs
  to_process=("${child_pids[@]}")
done

# Remove duplicate PIDs
all_pids_unique=($(printf "%s\n" "${all_pids[@]}" | sort -u))

# Join all PIDs into a comma-separated list for ps
pid_list=$(
  IFS=','
  echo "${all_pids_unique[*]}"
)

# Get the state and command of all descendant processes
ps_output=$(ps -o state= -o comm= -p "$pid_list")

# Check if any of the processes match the regex
echo "$ps_output" | grep -iqE '^[^TXZ ]+ +(\S+/)?g?(view|l?n?vim?x?|fzf)(diff)?$'

# Store the exit status
is_vim_running=$?

# Exit with the appropriate status
exit $is_vim_running