what is the approach people take when declaring files containing the Python code necessary for tests to run (e.g. some commons, utils, fixtures, constants)? Say file

commons.py

under the

tests

directory along with

test_*.py

files containing tests.

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I'm trying to organize a monorepo containing a bunch of Python packages. Each package is managed by Poetry and thus has its own pyproject.toml and poetry.lock. An issue I'm running into is that when a new dependency is added to package A, it is necessary to run

poetry install

for all packages that specify package A as a path dependency so that their poetry.lock is updated. I learned about Pants in a comment on an issue about monorepos on the Poetry issue tracker. I was hoping Pants would be able to solve the problem above. Does it? It's not clear to me what "Poetry support" in Pants encompasses. From, early experiments with Pants 2.6 it doesn't seem that Pants considers the Poetry lock files. I'm hoping someone can shed some light on this here. Thanks! 🙏

What is the link between source roots and BUILD files? Only directories that match a source root will be scanned for a BUILD file?

I wonder if we could have a

disambiguate

target. If there are multiple source roots that each contain a

tests.fixtures

package, for example, maybe we could do something like

disambiguate(packages={"tests.fixtures": "./fixtures/"})

. Or even, add another arg to

python_library

like

python_library(disambiguate={"tests.fixtures": "./fixtures/"})

so that anything in that target that imports something from

tests.fixtures

would use the

./fixtures/

as the dependency. And any files that do not depend on

tests.fixtures

would not get a hard-coded dependency on it (as with

python_library(dependencies=…)

). Basically, an extra knob to tune dependency inference without requiring hard-coded dependencies.

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regarding pex_binary option

platforms

, does it not matter if it is a hyphen or underscore between system and arch? https://www.pantsbuild.org/v2.7/docs/reference-pex_binary#codeplatformscode The examples shown use both..

Platforms should be in the format defined by Pex (https://pex.readthedocs.io/en/latest/buildingpex.html#platform), i.e. PLATFORM-IMPL-PYVER-ABI (e.g. “linux_x86_64-cp-27-cp27mu”, “macosx_10.12_x86_64-cp-36-cp36m”):

PLATFORM: the host platform, e.g. “linux-x86_64”, “macosx-10.12-x86_64".

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Another feature idea (possibly in a plugin): There are a few developer tasks that don't fit within the pants goals:

fmt

,

lint

,

package

,

repl

,

run

,

test

, and

typecheck

(and friends: https://www.pantsbuild.org/docs/reference-all-goals) For instance there are a bunch of scripts here: https://github.com/pantsbuild/pants/tree/main/build-support/bin And other projects will have their own set of ad-hoc tasks that need to be done (regen constraints, or build a venv for external tooling, or version bumping, or ...) With a

Makefile

, these tasks get added as additional custom make targets. We could use pants plugins to add more goals, but a pants-plugin feels like overkill for some of these tasks that are not meant to ever pass through remote caching & execution. But I really want

./pants

to be the single point of entry for developer tasks. So, what if there was a lighter weight way to extend pants? Maybe an

invoke

pants-plugin (or call it a

do

plugin?) that allowed for running tasks written for http://www.pyinvoke.org/ ? Essentially, a way to have a collection of plain (or nearly plain) python scripts that pants can run locally? Maybe the plugin would be able to dynamically create

--help

for all of the available scripts so that it's a bit more structured than

./pants run

, but still extremely flexible.

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Maybe good to submit a PR to this list to get pants added: https://github.com/cs01/python-packaging-tools

I'm running into

...

ResolveError: No owning targets could be found for the file `dir/package-a/tests/conftest.py`.

Please check that there is a BUILD file in the parent directory dir/package-a/tests with a target whose `sources` field includes the file. See <https://www.pantsbuild.org/v2.6/docs/targets> for more information on target definitions.

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> brew install python-launcher
> man py

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Does Pants offer the ability to run tests using tox (or Nox), or offer a similar option for running the tests in an isolated virtual env into which the packages are installed (so that the distribution is discoverable with _pkg_resources_ and _importlib_metadata_?

http://packaging-con.org/ may be interesting to some folks here

The docs Passing arguments section for the

run

goal mentions running an executable like this:

$ ./pants run project/app.py

I am confused — if there is a file

app.py

in the

project

directory, one wouldn’t be able to run it with the command above.

Is there any way to patch a 3rdparty dependency file? currently stuck on an old version of tensorflow which pins to an old version of grpcio so currently stuck with that version when using a lock file. Would be nice to be able to change while resolving to require something else since it will work with the never version. Have thought about generating the wheels but they are big to ship around.

https://twitter.com/pantsbuild/status/1420873457902886913 Thanks to @wilsonliammm, the upcoming Pants 2.6.0 release has native support for Poetry configuration for 3rdparty dependencies! Read more about how this enables easier management of multi-project repositories, and about his experience building it: https://t.co/r1CQgIqmQU #python Twitter

Hi there, are there any instructions on setting up IDE intellisense for a Python repo managed by Pants? Our developers typically use vscode and PyCharm. Thanks

https://twitter.com/stuhood/status/1420874143357014018 Pants Build retweeted: @pantsbuild @wilsonliammm This is particularly useful when you'd like to publish multiple wheels out of a single re… https://twitter.com/i/web/status/1420874143357014018 Twitter

https://twitter.com/brettsky/status/1420913821137334278 Pants Build retweeted: Introducing PEP 665: Specifying Installation Requirements for Python Projects (aka lock files)… https://twitter.com/i/web/status/1420913821137334278 Twitter

I see that there is an option to show all the output, failed output and

never

for pytest runs. Is there a way to show skipped and failed by default? When I try

./pants test --output=failed a/tests/python:: -- -rs

I only get failed. When I try

--output=all

I also get the "passed" output.

Question from someone at my company: Is it possible for Pants to set an environment variable when running

./pants repl

? Does

extra_env

work everywhere or is it just a

test

thing?

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Will poetry dependency groups affect the new

poetry_requirements

macro? https://python-poetry.org/blog/announcing-poetry-1.2.0a2/#dependency-groups

https://twitter.com/pantsbuild/status/1422320665588232205 Introducing Pants 2.6: Poetry support, third-party type stubs, and linter reports. https://blog.pantsbuild.org/introducing-pants-2-6/ #python Twitter