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I'm following this tutorial for scripting the creation of tmux windows.

tmux new-window t $SESSION:0 -k -n MAIN 'cd ~/main/ && perl -Ilib myapp'

sometimes I kill myapp after I've started tmux, I want to drop back to a shell in that directory, but instead this kills the window entirely. What is the best way to fix this? I think at least one answer involves running a shell and having that shell run commands, but I'm not sure on the best way to accomplish that.

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tmux new-window t $SESSION:0 -k -n MAIN 'cd ~/main/ && perl -Ilib myapp; $SHELL'

will launch your default shell when the previous commands have terminated (regardless of their return value, i.e. even if you didn't kill them).

If you only want to drop to the shell if the perl process was killed or failed (and have the tmux window close if it succeeded), use

tmux new-window t $SESSION:0 -k -n MAIN 'cd ~/main/ && perl -Ilib myapp || $SHELL'
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