`run_before_script`: Allow daemonized functions to run

[tony]

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pipx install --suffix=@run_before_script 'tmuxp @ git+https://github.com/tmux-python/tmuxp.git@tn-run-before-script-daemonized'

re: #692

[codecov[bot]]

Codecov Report

Merging #743 (9ebd7d6) into master (51f673a) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #743   +/-   ##
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  Coverage   75.96%   75.96%           
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  Files           7        7           
  Lines        1190     1190           
  Branches      311      311           
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  Hits          904      904           
  Misses        199      199           
  Partials       87       87           

Impacted Files	Coverage Δ
tmuxp/util.py	84.41% <ø> (ø)

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[tony]

this functionality may turn out may be better to put before running tmuxp load <session>, e.g.

kak -d -s sessionname && tmuxp load yoursession`

I thought of the fabled @bitprophet when I think of a way to launch a process to the background like a daemon into the background, "spawn it and forget about it". The examples on github search brought up fabric and invoke. In hindsight I realize the times I started mysql or postgres it was using those

@ttttcrngyblflpp @Segaja #692 is turning out to be harder than it looks when it comes to commands like that. Would running the script before tmuxp in shell do for the ones that happen in the background?

[aschleifer]

At least for me it would be possible to execute the VPN connection before i call tmuxp, yeah. But maybe then it should be mentioned in the documentation that the before_script has problems with processes which try to fork into the background?

[tony]

@aschleifer Closed for now, per conversation here, and if you want to revisit this let me know :)