Hi pants What s the recommended way to install a 1st party C Pants #general

Hi pants! What’s the recommended way to install a ...

full-toothbrush-75676

09/27/2021, 7:17 PM

Hi pants! What’s the recommended way to install a 1st-party CLI tool from source in “editable” mode using

pants

? This would be helpful to use while developing the tool so changes to source are reflected when using the CLI tool without having to uninstall / reinstall. From reading the

pants

docs, it seems like using a

python_distribution

with

entry_points

might be my best bet for installing said CLI tool, but I’m not finding if there is a way to install this distribution in “editable” mode. Let me know if I’m on the wrong track, too…

full-toothbrush-75676

09/27/2021, 7:20 PM

Hmm thinking about this a bit more – would this even be possible in a monorepo using

pants

? B/c pants does some magic to pull in other 1st-party dependencies, it’s probably not nearly as straightforward as the dynamic linking that

setuptools

does with

python setup.py develop

– is my understanding correct here?

witty-crayon-22786

09/27/2021, 7:33 PM

generally to iterate on a 1st party tool, you’d define a

pex_binary

for it, and then

./pants run

./pants package

witty-crayon-22786

09/27/2021, 7:33 PM

which would use the latest sources at each invoke

full-toothbrush-75676

09/27/2021, 7:46 PM

Ahh I totally missed

./pants run

– thanks, that should do it!

witty-crayon-22786

09/27/2021, 9:46 PM

sure thing! depending on whether your package does something sideeffecty (triggering the nukes / gender reveal, etc), you might also be able to use

./pants --loop run

to re-run it continuously as files change

👍 1

witty-crayon-22786

09/27/2021, 9:48 PM

(although

--loop

won’t kill the process if it is long-lived, so not useful in all cases: see #9462)

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