Pytest Incompatibility with ROS2 Humble Release on Robostack about pixi

[wolfv]

actually, what i did didn't work. let me see about that.

[tdejager]

This pixi.toml seems to work for me on osx-arm64. Can you see if the same issue occurs with this one? Your original is missing the python dependency.

[project]
name = "proj"
channels = ["conda-forge", "robostack-staging"]
platforms = ["linux-64", "osx-arm64"]

[dependencies]
python = "3.11"
ros-humble-ros-base = "*"

[pypi-dependencies]
pytest = "*"

Seems to be using this conda pytest version:

pytest                                             8.2.2         pyhd8ed1ab_0          251 KiB    conda  pytest-8.2.2-pyhd8ed1ab_0.conda

[alberthli]

My apologies. Yes, this still occurs when I add the missing python dependency (both the version I have here and the one you posted above, which pins the version).

[project]
name = "proj"
channels = ["conda-forge", "robostack-staging"]
platforms = ["linux-64"]

[dependencies]
python = ">=3.10"
ros-humble-ros-base = "*"

[pypi-dependencies]
pytest = "*"

[wolfv]

@alberthli - do you mean we need to update the ros-humble-launch-testing package for humble?

[alberthli]

I'm not 100% sure, but it might be a good start, since it seems like this exact bug was resolved about 1 month ago on the ROS2 side. If the package hasn't been updated on RoboStack since then, it's probably at least a necessary condition.

[wolfv]

Package should be online in a few minutes (max 30 minutes). Then, can you run pixi update and see if the issue persists?

[wolfv]

The other workaround would be to downgrade pytest I think.

[alberthli]

Thanks, I'll give it a shot (is there any way for me to verify on my end whether the new package has gone online yet?).

I would downgrade pytest, but it seems like the version is pinned on the ROS2 side. For instance, if I pin it to 8.0.0 in the pixi.toml, I get

  × failed to solve the pypi requirements of 'default' 'linux-64'
  ├─▶ failed to resolve pypi dependencies
  ╰─▶ Because you require pytest==8.0.0 and pytest==8.2.2, we can conclude that the requirements are unsatisfiable.

upon running pixi shell.

[wolfv]

In that case you probably can also remove pytest in your pypi-dependencies (if it's already installed).

[tdejager]

In that case you probably can also remove pytest in your pypi-dependencies (if it's already installed).

In my case it seems to get pytest from conda, the pypi-dependencies does not seem to have an effect on osx-arm64 at least, probably included by the ROS base?

[alberthli]

Interestingly, for me, whether or not I include pytest in my pypi-dependencies, pip show pytest always indicates that pytest 8.2.2 is installed in the pixi shell. I also have as the conda version:

pytest                    8.2.2              pyhd8ed1ab_0    conda-forge

The conda version is the same either way as well.

[tdejager]

Interestingly, for me, whether or not I include pytest in my pypi-dependencies, pip show pytest always indicates that pytest 8.2.2 is installed in the pixi shell. I also have as the conda version:

pytest                    8.2.2              pyhd8ed1ab_0    conda-forge

The conda version is the same either way as well.

Yeah the pypi dependencies for pytest don't do anything because the base includes: https://prefix.dev/channels/robostack-staging/packages/ros-humble-ament-cmake-pytest

And that pulls in the conda pytest. During the pypi resolve we use the conda version so the pypi version is never installed.

[alberthli]

OK, that makes sense. Any clue why this bug seems to affect linux-64 but not osx-arm64?

My current workaround is to define some workaround task that downgrades pytest after the environment is set up, but I would love to be able to simply build the environment without issue.

[wolfv]

@alberthli I am quite sure that you can just define pytest = 8.0 or some other older version in your dependencies (NOT pypi-dependencies), and things would work (as a workaround). I am working on updating the packages in ros-humble so that this is fixed.

Try this:

[project]
name = "proj"
channels = ["conda-forge", "robostack-staging"]
platforms = ["linux-64"]

[dependencies]
python = ">=3.10"
ros-humble-ros-base = "*"
pytest = "8.0.*"  # or whatever older version works!

[alberthli]

Ah, thank you for the obvious solution - I completely forgot to try specifying its version as a non-pypi dependency.

[tdejager]

Do you think we could close this as this is a ros-humble issue :)?

[alberthli]

I would be OK closing it as long as I had another issue/PR that I could track - does another one exist? If not, I could open it and reference this issue in it.