Definitely curious what you all have to share. We’ve identified Python data science and ML as one of the areas we want to optimize for and have a very polished experience

i’m supporting the ML teams at twitter via pants right now too, would love to fix any issues.

Hey, we've been using pants v2 for about two weeks now for all our ML/DL stuff, and it's been awsome 🔥🔥, no major problems identified, just by following the docs, I was able to have a working linter/formatter and ci pipeline easily so kudos for that too, one thing that I miss dearly for a data science project is to use jupyter notebooks, I know that Ipython is supported so jupyter should theoritically should easy to add too ( maybe as a plugin ? ). Another minor thing is the time taken to re-resolving of all dependencies when running tests or binaries, (usually 10 mins per target, with multiple targets having the same deps...), but as I've it's only minor, since having a warm cache usually speeds up stuff greatly

https://twitter.com/gise_rossi/status/1271083691087970304 Pants Build retweeted: So if you're working with @pantsbuild and #pytest and you want to change the timeout of your tests there are 2 thin… https://twitter.com/i/web/status/1271083691087970304 Twitter

Hi there ! I've opened a PR on github about non strict timestamps in zips (https://github.com/pantsbuild/pants/pull/10032). It shows that this is a new parameter in python 3.8, then @hundreds-father-404 suggests to try another method. My second guess about this would be to force pants incremental compilation to update modification date to

now()

even in case of unmodified jar. Do you have any clue for me ?

Hi everyone! Thanks to @aloof-angle-91616 for telling me about this community :)

Hey! Welcome welcome 😄

Look: you’re already famous here 🙂 https://pantsbuild.slack.com/archives/C046T6T9U/p1591938055417900

welcome!

Happy Friday everyone! Reminder: we're aiming for an official Pants 2.0 launch in a few weeks. (See https://bit.ly/3d3wHq1)! We're looking for launch partners - orgs that can test out 2.0 and give us feedback. We will help you with adoption and onboarding, including any custom build rules you may need. Your requirements and feedback will inform the features and priorities for 2.0 and beyond. Plus you get to rock those hot new pants before they're available in stores... 👖 If you're interested in becoming a launch partner, do reach out to me here or by email (benjy@toolchain.com), we'd love to hear from you!

Hi, I’m getting a

ModuleNotFoundError

with v2 when I try to

./pants run

a particular Python target (the module not found is a package in our repo). It seems that the pex files are layed out differently between v1 and v2 (or else I’ve misconfigured things?), but the v1 puts the dependency package (“ns_python_logger”) in the root directory while v2 puts it under a path that mirrors our repo (“lib/python_logger/src/ns_python_logger”).

does anybody know if there's a docker bundling plugin for v2 yet? I'm struggling to search for it online, because "pants docker" keeps taking me to shopping results for khakis 😓

Hi everyone 🙂 I've started moving some projects to pants a couple of months ago and it's been great so far 🎉 I'm now trying to upgrade all of them to use the new v2 engine 🤞

the only project I'm having trouble with is one tha lives a directory "lib", is there any naming restriction?

Question to the community: One of the features we're looking at for 2.0 is not requiring so much BUILD file boilerplate. For example, we can infer dependencies in most cases by analyzing import statements, and sometimes we can even infer the targets themselves (for example if you do

./pants binary path/to/main.py

we know what you mean even if there is no `python_binary`target). See https://bit.ly/3d3wHq1 for more detail. How valuable would you find such a feature on a scale of 1 (not at all valuable) to 5 (extremely valuable)?

@happy-kitchen-89482 has a poll for you! (edited)

Made a 2.0 github project and created issues for the outstanding work: https://github.com/pantsbuild/pants/projects/18

@cuddly-window-48195: new thread for the

dependencies

issue

need a little help upgrading to 1.29.0, specifically around backing out a hacky custom target while retaining the same functionality. I can give a short request and provide more context as needed. details in thread

Hey folks, am i correct in understanding that you cannot combine a spec-file with a

--changed-include-dependees

flag?

Is there a way to set the cache directory for Pants v2? I can't find anything about that in the v2 docs.

Sorry to bother again: I'm having a problem with installing/building dependencies in Pants v2 inside of a

python:3.7-buster

container. While building wheels gcc throws

fatal error: Python.h: No such file or directory

. Python.h is indeed available under the following path:

/usr/local/includes/python3.7m/

, however, from the gcc call that fails I can see that only

/usr/includes/python3.7m/

is included. Any idea what the cause of this could be? Shouldn't it use the includes from the

~/.cache/pants/setup

directory anyway?

https://twitter.com/benjy/status/1273063266969808898 Pants Build retweeted: My SF Python meetup talk on "How the @pantsbuild system leverages Python 3 features". Enjoy! Twitter

Hi, I'm an absolute beginner to pants and would like to use it for python projects, so to get a better understanding how it works I'm trying to build the python examples at https://github.com/pantsbuild/pants/tree/master/examples/src/python/example But when running

./pants binary examples/src/python/example/hello/main

I get

FAILURE: Problem locating a java distribution: Failed to locate a JDK distribution with minimum_version None, maximum_version None

I'm running Ubuntu 18 and have OpenJDK installed. The only related issue I could find is https://github.com/pantsbuild/pants/issues/3815, but this was closed as fixed. Did I miss something?

Heads up all: As a reminder, 1.30.0 will be the last stable release to support the v1 engine. Now that 1.30.0rc0 is cut, we are proceeding with the purge of v1 code (!!!!!)

Expect to see a lot of deletions over the next few days, which will bring a corresponding reduction in CI time and increase in CI stability.

If you want to be able to run the same junit tests in different environments, eg java 8 and java 11, how would you expect that to be expressed in BUILD files? I’m working on making some affordances around that, and I wanted to see what folks here thought.

While trying to run the latest version of

./pants

(as downloaded from https://pantsbuild.github.io/setup/pants) with a

pants.ini

with version 1.18.0 I got an error that took a while to fix. The error message is

Exception message: Unrecognized command line flags on global scope: --pants-bin-name.

I resolved it by using the

./v1

pattern instead. It should be possible to give a hint that someone is using an older engine instead of giving a cryptic error message. Would it be helpful for me to make in issue/feature request around this?

Spoke too soon. Using

.pants --v1 --no-v2

did not resolve the problem.