pantsbuild #general

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fresh-architect-74417

02/26/2020, 11:02 PM

What's the command to validate build targets are correct?

fresh-architect-74417

02/26/2020, 11:04 PM

Copy code

./pants list

fresh-architect-74417

02/26/2020, 11:04 PM

Thanks ^_^

👍 1

aloof-angle-91616

02/26/2020, 11:04 PM

thanks for sharing the answer!!!

fresh-architect-74417

02/26/2020, 11:04 PM

😄

hundreds-father-404

02/26/2020, 11:15 PM

./pants filedeps ::

is good too because it will resolve (“hydrate”) your

dependencies

and ensure those are valid.

./pants filedeps :: > /dev/null

wide-energy-11069

02/27/2020, 12:28 AM

Hi, on a high level, is there any difference between running

./pants fmt2

vs running

black

directly on CLI for adhoc files? If yes, does the pants invocation pick up additional config?

aloof-angle-91616

02/27/2020, 12:28 AM

in the pants repo, there's a

pyproject.toml

that it picks up

fresh-architect-74417

02/27/2020, 3:59 PM

Does pants support distributed testing?

few-alarm-32433

02/27/2020, 4:25 PM

Hi all, made an issue about the mypy plugin but just want to bump it here in case I’m doing something wrong and there’s a simple fix: https://github.com/pantsbuild/pants/issues/9177

fancy-queen-20734

02/27/2020, 11:38 PM

git diff --name-only $(git merge-base master HEAD) | xargs black

<< used this to get my branch in a better shape before merging master

👍 1

rapid-crayon-8232

02/28/2020, 3:28 PM

Hello everyone, when running pants on MAC OS X, I stumble a lot on this error

Exception message: Could not initialize store for process cache: "Error making env for store at \".cache/pants/config/lmdb_store/processes/f\": Too many open files"

, this means that a lot of files are opened, and it can be fixed with setting

ulimit -n 10000 # or whatever number

, what I don't understand is why pants need to open that many files? is it intended or a bug? Thanks : 😊

fancy-queen-20734

02/28/2020, 9:32 PM

I’m running into issues running fmt2. The pex resolution is having problems. I think it has to do with python2/3 issues. I’ll thread my output

fancy-queen-20734

02/28/2020, 11:34 PM

I responded to @aloof-angle-91616’s feedback on https://github.com/pantsbuild/pants/pull/9150, and updated it with the black reformat. Any others want to take a look?

aloof-angle-91616

03/01/2020, 5:23 AM

@happy-kitchen-89482 this improvement to

./pants help

output is awesome!!!! https://github.com/pantsbuild/pants/pull/9199

😀 1

happy-kitchen-89482

03/01/2020, 5:24 AM

thanks!

faint-grass-11531

03/03/2020, 12:07 AM

quick question. Pants build uses system Python, right? What are people doing right now to be able to run it in Python 3 or Python 2? Our build processes use docker containers so it's not a problem, but it would be nice if developers could run it outside a docker container just to quickly test changes.

faint-grass-11531

03/03/2020, 12:08 AM

We're in a weird intermediate state where some projects in our repo haven't been migrated to Python 3 yet.

happy-kitchen-89482

03/03/2020, 12:52 AM

@faint-grass-11531 Which version of Pants are you on? Generally speaking Pants has an interpreter selection mechanism, so it'll choose a suitable Python interpreter from whatever it finds on the PATH.

happy-kitchen-89482

03/03/2020, 12:52 AM

It doesn't just use the first

python

it finds...

happy-kitchen-89482

03/03/2020, 12:53 AM

It will check the version of all the

python

s it finds and use one compatible with the targets

happy-kitchen-89482

03/03/2020, 12:55 AM

Pants v1 has its own interpreter selection mechanism at build time, I think v2 is all pex

👍 1

hundreds-father-404

03/03/2020, 12:55 AM

Check out https://www.pantsbuild.org/python_readme.html#configure-the-python-version for how you can mark what interpreter versions your targets and overall project is compatible with. https://www.pantsbuild.org/python_readme.html#configure-the-python-version You can have some targets that are Python 2 only, some that are Python 3 only, etc, and Pants will understand it all 🙂 Pants will error with a helpful message if it can’t find a compatible interpreter because the constraints conflict, e.g. when you try to use a Python-2 only target with a Python-3 target.

aloof-angle-91616

03/03/2020, 1:10 AM

(it's super neat!!!)

happy-kitchen-89482

03/03/2020, 1:55 AM

Hi all, I'm making a standalone example repo specifically to demonstrate v2 Python support: https://github.com/pantsbuild/example-python just FYI

💯 2

happy-kitchen-89482

03/03/2020, 1:56 AM

It will be a "template repo" so users can clone its structure to build up their own examples or even real repos

🔥 1

👖 1

fancy-motherboard-24956

03/03/2020, 3:01 PM

Good morning, I get this when trying to

./pants fmt2

on master

Copy code

stderr:
            Failed to execute PEX file. Needed macosx_10_15_x86_64-cp-36-cp36m compatible dependencies for:
             1: docformatter==1.3.1
                But this pex only contains:
                  docformatter-1.3.1-py2-none-any.whl
             2: untokenize==0.1.1
                But this pex only contains:
                  untokenize-0.1.1-py2-none-any.whl

Has anyone seen this before? Could it be related to the pex upgrade? Any known steps to perform to get to a working state?

hundreds-father-404

03/04/2020, 2:18 PM

Hi, could I please get some eyes on this email to pants-devel titled:

Migrating from pants.ini to pants.toml (Optional)

? https://docs.google.com/document/d/1WR2fb0CecquGr0KJbvnZXE1fZXbA5xhGmzai8wDcpRw/edit

👍 1

fancy-motherboard-24956

03/04/2020, 2:31 PM

Question: Is there any particular reason scalafmt isn’t enabled by default in pants’ own config? We do have some scala code. If I enable it in pants.ini and format all our scala code, will anyone have any objection?

rapid-crayon-8232

03/04/2020, 3:00 PM

hello guys, any idea? I'm trying to set up the pants v2 backend for python 😊 https://pantsbuild.slack.com/archives/CASMF8SJ1/p1583329759004100?thread_ts=1583200567.003900&cid=CASMF8SJ1