pipx install not quite idempotent

Hi. I’m writing scripts to install multiple packages via pipx (thank you for writing it!). I want these scripts to be idempotent (i.e. running it a second time has no impact after running it once, and it still succeeds). I also want to know when there are errors during installation. However, the current way pipx install is implemented makes those two conflicting goals.

Running pipx install foo a second time does nothing more than running it just once (except print a message the second time saying “Not installing to existing directory …”), which is good. However, the exit code for that second time is set to a non-zero value. So either I ignore the exit code, and then pipx install foo is idempotent, but I don’t know if there was an error. Or I look at the exit code, and then I’ll know if the install failed, but then running it a second time is not the same as once (because it fails with a non-zero exit code the second time).

[uranusjr]

cc @itsayellow @gaborbernat

[uranusjr]

Feel free to submit a PR for this.