Starting from pixi-0.21.0 pixi task list will fail if system-requirements do not comply, but without saying so

[anjos]

Checks

• I have checked that this issue has not already been reported.

• I have confirmed this bug exists on the latest version of pixi, using pixi --version.

Reproducible example

In an empty directory, create pixi.toml with the following contents:

[project]
name = "test"
channels = ["conda-forge"]
platforms = ["linux-64"]

[system-requirements]
linux = "7.0.0"

[tasks]
task1 = "echo task1"
task2 = "echo task2"

Start a container for the target platform (N.B.: I'm on a macOS with Apple Silicon machine), such that pixi info reports a value smaller than the system-requirements set above:

$ docker run --platform linux/amd64 -v $PWD:/work --rm -ti ghcr.io/prefix-dev/pixi:0.21.0 /bin/bash
$ cd work
$ pixi task list
No tasks found

(N.B.: Same holds for 0.21.1).

If you lower the system-requirements, then the task list works again.

If you execute the same on 0.20.1, you get, however:

$ docker run --platform linux/amd64 -v $PWD:/work --rm -ti ghcr.io/prefix-dev/pixi:0.20.1 /bin/bash
$ cd work
$ pixi task list
* task1
* task2

Issue description

N/A

Expected behavior

I'm not sure what to expect, however, it would be great to get a message that is more consistent with the actual problem than No tasks found.

[ruben-arts]

He @anjos, this is indeed the expected behavior based on the change we did in v0.21.0. the task list only list the tasks that can run on the current machine. That said I think you are correct that we should improve the message!