https://twitter.com/treyhunner/status/1446502800247214084 Pants Build retweeted: New blog post: What's great about #Python 3.10? There's some fun new features, but improved error messages are *th… https://twitter.com/i/web/status/1446502800247214084 Twitter

https://twitter.com/jezdez/status/1446489442773049370 Pants Build retweeted: "For the first time in more than 20 years we have a new leader of the pack: the Python programming language. The lo… https://twitter.com/i/web/status/1446489442773049370 Twitter

Does anyone here have experience with mutmut? https://github.com/boxed/mutmut Thought it looks like an interesting approach to find weakly tested areas of code, and would potentially make a nice addition to the pants toolbelt..

How feasible is it to build native-code modules for python with pants?

When is the next dev release going to happen? I want to test the restartable (just saw it was approved). 😗

A lot of people create a proof of concept branch or repo to help sell their team on how the group would benefit from choosing to adopt Pants. For those who've done that, could you elaborate on what you did (or are doing?). It would help us to understand what early steps are common on the path toward adoption.

Another bike shed! A flagship feature for Pants 2.8 is the

overrides

field, which allows you to more easily override metadata for a single file w/o having to define new targets. For example,

overrides={
  "foo_test.py": {"timeout": 120},
  ("bar_test.py", "baz_test.py"): {"timeout": 240},
}

Feedback welcomed on what this syntax should look like: 🧵

https://twitter.com/codewithanthony/status/1447385879241269249 Pants Build retweeted: flake8 4.0.0 has been released! this upgrades pyflakes / pycodestyle and removes a bunch of deprecated things. al… https://twitter.com/i/web/status/1447385879241269249 Twitter

Why do I have this:

ERROR: No matching distribution found for pantsbuild.pants==2.8.0.dev4

? I can install

pantsbuild.pants==2.8.0.dev4

via pip, but when I change the version on the

pants.toml

I have the error. 🤔

restartable doesn't work with uvicorn in the expected way, more on thread

btw, is there a way to modify a package? e.g. I want to modify

uvicorn

, and use that on the pex binary. I can create a PR and add that hash to the requirements, but is there an easier way?

Can I use

script

field from

pex_binary

with

./pants run

? 🤔 It seems like I can't add the arguments when I run it?

Do I need the

./pants run

to have the restartable behavior? Or can I use only the pex binary with some env variable or something like that?

hmmm... having issues with the new pants version on ubuntu... works fine on macos..

Hi pants-people, I was invited into this slack due to https://github.com/pantsbuild/pex/issues/1477#issuecomment-941070905. After playing around a while with pex, I feel like I'm having some basic-understanding issues, since I'm running into issue after issue. My use case and assumptions: • I want to build a pex file that contains a command line utility, and distribute it within my company for pipelines (debian) and humans (3+ linux archs and Mac) to use, targeting cpython 3.8, 3.9, and tentatively 3.10 • I need fine-grained control over the dependencies, meaning that only 3rd party packages are used that were part of a successful test-suite exection (i.e., I run pex with

--no-pypi

and

--repo my_wheelhouse

) • to populate

my_wheelhouse

, I build my application as a wheel, as well as all variants of my dependencies that I will need for the platforms I plan to support (plus

setuptools

, for some reason) • since I am providing all the necessary dependencies, pex doesn't need to do run any build steps, so it doesn't matter which interpreter pex itself is installed with, or which ones it can see on the PATH Is everything ok so far? In particular the last point seems to be an issue, because my error messages change a lot depending on where pex was installed. I initially used

pipx

because it felt to me like a non-project bound build tool that I would want to install globally, and not into the virtualenv of my application. Similar to

poetry

, if that makes sense (by now, in my desperation, I have I think 4 installations of pex floating around on my system). I can try to build a reproducible example, but it would take me a while. I was hoping that someone can clear up for me how pex wants to be used instead 😃

https://twitter.com/PythonWeekly/status/1448272496789184521 Pants Build retweeted: Putting Pants On: One Thing We Did Right After 5 Years with Django by @gordon_cassie https://buff.ly/3v12GSb #Python #Django Twitter

I mentioned this in a previous thread but figure it's better asked at the top: I'm trying to get documentation building to work in my proof-of-concept and am running into some major hickups. In particular, there doesn't seem to be any support for Sphinx in Pants 2.x. Is that correct or did I miss something major? Also, Sphinx wants to load all packages as regular Python code for extracting documentation. That seems to call for packaging everything as a PEX. Are there easier alternatives? I've had troubles with getting a shell script to work but also would prefer avoiding writing my own Python driver script.

Hey - I'm trying to get a build working on ARM-64. I've successfully compiled pants and the build starts but I have a step that runs

protoc

via the standard pants

protobuf_library

goal. If I run the build with

--no-process-execution-local-cleanup

I can cd into the directory and if I try to run the command I get

bash: ./bin/protoc: cannot execute binary file: Exec format error

. Indeed, if I just run

./bin/protoc

I get that error. However, I have

protoc

installed so if I change the command to run just

protoc

instead of the

./bin/protoc

in the sandbox it works. I think the issue is that pants seems have bundled their own protobuf compiler and it's an intel build, not an ARM build. Is that correct? Any way I can fix that?

In a non-pants environment, if you are teaching someone Django you would tell them to run the following:

pip install Django==3.2
django-admin startproject mysite

Trying to map this over to a fresh pants environment. If I add

Django==3.2

to my

requirements.txt

is there some light weight way I could run the

django-admin

script contained in that package through the pants CLI?

https://twitter.com/jezhumble/status/1448318922713821186 Pants Build retweeted: It’s come to my attention that many people think continuous delivery/deployment is about taking whatever crap you h… https://twitter.com/i/web/status/1448318922713821186 Twitter

Hi @hundreds-father-404 @witty-crayon-22786. Sorry to be a bug machine today but...

--no-python-setup-resolve-all-constraints

got me further but then I hit what I think is a different bug so I figured I'd start a new thread. I'm getting this:

ERROR: Cannot install numpy and opencv-python-headless==4.5.3.56 because these package versions have conflicting dependencies.
...
 The conflict is caused by:
     The user requested numpy
     opencv-python-headless 4.5.3.56 depends on numpy>=1.19.3

but that works fine on Intel with the same deps. So what gives? If you look at the

setup.py

for opencv you find this:

if sys.version_info[:2] >= (3, 6):
        minimum_supported_numpy = "1.13.3"
    if sys.version_info[:2] >= (3, 7):
        minimum_supported_numpy = "1.14.5"
    if sys.version_info[:2] >= (3, 8):
        minimum_supported_numpy = "1.17.3"
    if sys.version_info[:2] >= (3, 9):
        minimum_supported_numpy = "1.19.3"

So the

1.19.3

seems like it's coming from the

if

that checks if I'm using python 3.9 or above. pants is running with 3.9 but I'm building for 3.7. My `pants.toml`:

[python-setup]
interpreter_constraints = ['CPython==3.7.*']
requirement_constraints = 'constraints.txt'
interpreter_search_paths = ["<PYENV>"]

so it seems like it's resolving the dependencies based on the wrong Python version.

poll for the room: how many of you are installing

pants

via the setup script, and how many of you are using the

pants

PEX released to Github?

Does

pants

handle packages installed from VCS? It seems I’m always getting a stack trace during the parsing of the

poetry.lock

file when

pants

reaches a dependency that is installed from a VCS:

14:02:18.06 [ERROR] Exception caught: (pants.engine.internals.scheduler.ExecutionError)
  File "/Users/jbasila/.cache/pants/setup/bootstrap-Darwin-x86_64/pants.czNsHH/install/lib/python3.9/site-packages/pants/bin/local_pants_runner.py", line 236, in _run_inner
    return self._perform_run(goals)
  File "/Users/jbasila/.cache/pants/setup/bootstrap-Darwin-x86_64/pants.czNsHH/install/lib/python3.9/site-packages/pants/bin/local_pants_runner.py", line 175, in _perform_run
    return self._perform_run_body(goals, poll=False)
  File "/Users/jbasila/.cache/pants/setup/bootstrap-Darwin-x86_64/pants.czNsHH/install/lib/python3.9/site-packages/pants/bin/local_pants_runner.py", line 192, in _perform_run_body
    return self.graph_session.run_goal_rules(
  File "/Users/jbasila/.cache/pants/setup/bootstrap-Darwin-x86_64/pants.czNsHH/install/lib/python3.9/site-packages/pants/init/engine_initializer.py", line 135, in run_goal_rules
    exit_code = self.scheduler_session.run_goal_rule(
  File "/Users/jbasila/.cache/pants/setup/bootstrap-Darwin-x86_64/pants.czNsHH/install/lib/python3.9/site-packages/pants/engine/internals/scheduler.py", line 538, in run_goal_rule
    self._raise_on_error([t for _, t in throws])
  File "/Users/jbasila/.cache/pants/setup/bootstrap-Darwin-x86_64/pants.czNsHH/install/lib/python3.9/site-packages/pants/engine/internals/scheduler.py", line 506, in _raise_on_error
    raise ExecutionError(

Exception message: 1 Exception encountered:

  MappingError: Failed to parse BUILD:
Invalid URL: git+git@github.com:ourrepo/somerepo.git#1112223334354322362625662

I have tried to also convert the file to a

requirements.txt

but still I get the same result. What did I miss?

https://twitter.com/changelog/status/1448493188918956032 Pants Build retweeted: “Thanks for helping me with that gnarly git merge, I’m good to go from here!!” (wait for it) Twitter

Hi all, just wanted to give kudos to the Pants team and especially @witty-crayon-22786 for helping out with the issue my team faced with Pants here by pushing out a quick fix and with all the help that was given with the investigation. This helped to unblock a critical flow we needed to work reliably, many thanks! 🙏

Started a question on this yesterday but it was overshadowed by a 2nd question. I'm trying to get my build to work on ARM. One issue I'm having is that we use

opencv-python

but there isn't an ARM build for that on PyPi. You can

apt-get install python3-opencv

but pants won't pick that up. I do understand why: it breaks the hermetic build idea as you're using an outside dependency that could be updated via

apt

at any time. You can't can't correctly generate a constraints file because whatever tool you're using (e.g.

pip freeze

or

pip-compile

) wouldn't be aware of one of the dependencies and it's requirements/version. But, getting it to build on ARM looks like it's going to be a big time suck. Is there an "escape hatch" that allows one to use a globally installed Python library? ("no" is a perfectly reasonable answer here I think, was just hoping...)

Is there any way to isolate the pex file for a particular test target and the run it with a profiler so I can see exactly where all the time is spent. Running into an issue where the pytest reported test time is significantly lower than the actual run time.

https://twitter.com/pantsbuild/status/1448741524586500100 "Kudos to the Pants team and especially @stuhood for helping out with https://github.com/pantsbuild/pants/issues/12997 by pushing out a quick fix and with all the help that was given with the investigation. This helped to unblock a critical flow we needed to work reliably, many thanks! 🙏" Happy to! 👍 Twitter

So, what languages are ready or WIP? • python (of course) • shell (at least for linting) • golang (wip) • java (wip) What else? Is anyone looking at JavaScript?