Cannot solve an environment with platform_system == Emscripten on Linux/OSX #6641
Description
Given https://github.com/posit-dev/py-shiny/blob/77a679271ee94a64af597ad1159f6ab6bdeb1b51/pyproject.toml
The following requirements file should be solvable for "platform_system == 'Emscripten'"
shiny>=1.0
watchfiles < 0.18
Since one of its dependencies is:
"watchfiles>=0.18.0;platform_system!='Emscripten'",
$ uv pip compile requirements-conflict.txt correctly gives:
uv pip compile requirements-conflict.txt ✘ 2 feat_improve_resolver ✭ ✱ ◼
× No solution found when resolving dependencies:
╰─▶ Because only the following versions of watchfiles{platform_system != 'Emscripten'} are available:
watchfiles{platform_system != 'Emscripten'}<=0.18.0
watchfiles{platform_system != 'Emscripten'}==0.18.1
watchfiles{platform_system != 'Emscripten'}==0.19.0
watchfiles{platform_system != 'Emscripten'}==0.20.0
watchfiles{platform_system != 'Emscripten'}==0.21.0
watchfiles{platform_system != 'Emscripten'}==0.22.0
watchfiles{platform_system != 'Emscripten'}==0.23.0
and shiny==1.0.0 depends on watchfiles{platform_system != 'Emscripten'}>=0.18.0, we can conclude that
shiny==1.0.0 depends on watchfiles>=0.18.0.
And because only shiny<=1.0.0 is available, we can conclude that shiny>=1.0.0 depends on
watchfiles>=0.18.0.
And because you require shiny>=1.0 and watchfiles<0.18, we can conclude that your requirements are
unsatisfiable.
On Linux or OSX.
The seemingly only way to do 'cross-solving' would be to use the --python-platform flag, however, this is limited only to a particular set of values.
If it was possible to override the values for the environment marker (and ENV_VAR would suffice) it would allow cross solving for non-supported platforms.
My questions are:
- Can I do what I want with the current version (0.3.3) of uv?
- If not, is there a plan for, or interest in, allowing users to tweak/change the environment marker values, like
platform_system?