pantsbuild #general

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witty-crayon-22786

04/25/2022, 5:33 PM

see https://www.pantsbuild.org/docs/using-pants-in-ci for more info

wide-zoo-86070

04/25/2022, 6:03 PM

I think i find the answer to my question. It seem the env vars in our jenkins pipeline for unit and int tests are different. I believe when env vars are differernt, the pants will resolve the dependencies again.

bitter-ability-32190

04/25/2022, 6:09 PM

Ah yeah that makes sense. Pants today takes a very conservative approach to hermeticity, and invalidates eagerly. Who is to say an env car doesn't change the behavior of a Python install? (After all, setup.py is just code, it could do anything)

wide-zoo-86070

04/25/2022, 9:02 PM

Hi Pants team, I am wondering if you would add support for some tools which are not supported yet, thing like import-linter, doctest. Or is it easy for us to add them ourselves?

ambitious-student-81104

04/25/2022, 9:24 PM

is there a quick way to let all targets under a directory follow a certain resolve? I find having to manually update each target very... manual 😆

busy-vase-39202

04/25/2022, 9:58 PM

Pycon US is this week! A team from Toolchain will be there, including Pants maintainers @ancient-vegetable-10556 @happy-kitchen-89482 @enough-analyst-54434. They'll be handing out Pants stickers, providing in-person tech support and office hours. On Sunday at 1pm, Chris will be presenting "Fast and reproducible tests, packaging, and deploys with Pantsbuild’s hermetic environments". On Monday, the three of them will be hosting a full day Pants/PEX sprint. There will be plenty of #goodfirstissue tickets for newcomers to choose from. Or the team can help you pursue an interest of your own. Maybe creating a new plugin, or adding support for another tool?

🐍 3

🎉 3

😷 2

🙌 6

rapid-exabyte-76685

04/25/2022, 11:59 PM

Looks like there might be some unintended case transformation going on in the Docker plugin... if I specify...

Copy code

docker_image(
  ...
  image_tags=[
    "{build_args.BRANCH}"
  ]
)

where

BRANCH

is included in

[docker] env_vars

and

[docker] build_args

(is it correct that it should be included in both places?) ... and if

BRANCH

has upper-case characters it looks like the tags on the image are all in lower case. Or maybe this is by design?

clean-night-52582

04/26/2022, 2:15 AM

👋

👋 6

calm-ambulance-65371

04/26/2022, 3:26 PM

How are we supposed to handle shared dependencies with multiple

resolve='...'

? I have a large company-wide monorepo and we share some modules, but it seems resolve is overly strict and when simply running tests it can't resolve all requirements because they don't all use the same resolve

fast-nail-55400

04/26/2022, 3:30 PM

You can put shared dependencies into both resolves using the

parametrize

helper.

fast-nail-55400

04/26/2022, 3:30 PM

This basically duplicates the target for the shared dependency into multiple targets: one for each resolve.

calm-ambulance-65371

04/26/2022, 3:31 PM

interesting, does that work on regular

python_sources

fast-nail-55400

04/26/2022, 3:31 PM

yes

hundreds-father-404

04/26/2022, 3:31 PM

Exactly. Better docs coming hopefully today on this We know that we need better error messages when a dependency is not in the same resolve

👍 1

calm-ambulance-65371

04/26/2022, 3:33 PM

any examples of how I use parameterize?

fast-nail-55400

04/26/2022, 3:33 PM

basically set

resolve=parametrize("a", 'b")

hundreds-father-404

04/26/2022, 3:33 PM

python_sources

There, the semantic meaning is that this code can work with either lock file. Note that pants can't actually validate that for you through static analysis. For example, it is possible to have one lock file that uses Django two and another that uses Django three. If you claim that a file using Django works with both lock files, you will have to make sure that you are using the APIs safely Fortunately, pants will run mypy and Pylint with every relevant resolve.

hundreds-father-404

04/26/2022, 3:34 PM

Check out general docs on parametrizing https://www.pantsbuild.org/v2.11/docs/targets#parametrizing-targets

fast-nail-55400

04/26/2022, 3:34 PM

https://github.com/pantsbuild/example-jvm/pull/12 contains an example with JVM

hundreds-father-404

04/26/2022, 3:35 PM

At the very end, it talks about how you can combine

parametrize

with the overrides field. I switched tool chain last week to use multiple resolves, and found that often it is very helpful to be as precise as possible with which code needs to work with multiple lock files. It reduces the surface area of code that you must make sure is compatible

fast-nail-55400

04/26/2022, 3:35 PM

(

parametrize

is used for

resolve

on JVM targets, but the same syntax is used for Python targets, so still applicable as an example)

➕ 2

bitter-tiger-53933

04/26/2022, 5:01 PM

Hi folks I have some tests which rely on a file to work. I’ve specified this in the build file of the tests using the resource target. I can run the tests and it all works swimmingly. The trouble is I don’t want to include this file in git and when I run

./pants lint

it errors with a

InvalidFieldException: The 'source' field in target example/folder must have 1 file, but it had 0 files

. How can I tell pants to ignore this error and continue to lint even if the file doesn’t exist and is not in version control?

✅ 1

wide-zoo-86070

04/26/2022, 5:30 PM

Hi team, a question on third party dependencies, let us say in the requirement.txt, there is
x.y==1.0
. In a python script, there is
from x.y import z
. It seems that Pants will complain
ModuleNotFoundError: No module named 'x'
. Is it expected? and how to solve it?

calm-ambulance-65371

04/26/2022, 5:45 PM

hmm, that seems like it's going to be obnoxious, we have a

common

module in our monorepo that's depended on by something like 15 other modules

calm-ambulance-65371

04/26/2022, 5:48 PM

I might be able to figure out another way to make it work

fast-nail-55400

04/26/2022, 6:01 PM

Are you using 15 different resolves though?

fast-nail-55400

04/26/2022, 6:03 PM

You should only need to use

parametrize

with the actual different resolves.

calm-ambulance-65371

04/26/2022, 6:07 PM

I think we may need a resolve for each of our "entrypoints" (ie. a service or CLI utility)

fast-nail-55400

04/26/2022, 6:07 PM

You only really need different resolves if you have conflicting requirements.

calm-ambulance-65371

04/26/2022, 6:08 PM

hmm, I see