feat: add UV to python feature

[Fabrizio Cafolla (FabrizioCafolla)]

Hi, I opened a pull request for adding UV to Python feature

[Fabrizio Cafolla (FabrizioCafolla)]

@microsoft-github-policy-service agree

[Christof Marti (chrmarti)]

Opened #1327 for the test failure which seems to be triggered by some update upstream.

[Christof Marti (chrmarti)]

Scenario tests are failing now:

2025-04-17T12:03:16.6787830Z [2025-04-17T12:03:16.678Z] #15 68.05 creating virtual environment...
2025-04-17T12:03:16.6788466Z #15 68.05 installing uv...
2025-04-17T12:03:16.6788912Z #15 68.05 Fatal error from pip prevented installation. Full pip output in file:
2025-04-17T12:03:16.6789475Z #15 68.05     /usr/local/py-utils/logs/cmd_2025-04-17_12.03.15_pip_errors.log
2025-04-17T12:03:16.6789802Z 
2025-04-17T12:03:16.8505320Z [2025-04-17T12:03:16.850Z] #15 68.06 
2025-04-17T12:03:16.8505951Z #15 68.06 Some possibly relevant errors from pip install:
2025-04-17T12:03:16.8506813Z #15 68.06     ERROR: Could not find a version that satisfies the requirement uv (from versions: none)
2025-04-17T12:03:16.8507565Z #15 68.06     ERROR: No matching distribution found for uv
2025-04-17T12:03:16.8508050Z #15 68.06 Error installing uv.
2025-04-17T12:03:16.8508406Z #15 68.06 
2025-04-17T12:03:16.8509521Z #15 68.07 ERROR: Feature "Python" (Unknown) failed to install! Look at the documentation at https://github.com/devcontainers/features/tree/main/src/python for help troubleshooting this error.
2025-04-17T12:03:16.8510610Z 
2025-04-17T12:03:16.8793658Z [2025-04-17T12:03:16.879Z] #15 ERROR: process "/bin/sh -c cp -ar /tmp/build-features-src/python_0 /tmp/dev-container-features  && chmod -R 0755 /tmp/dev-container-features/python_0  && cd /tmp/dev-container-features/python_0  && chmod +x ./devcontainer-features-install.sh  && ./devcontainer-features-install.sh  && rm -rf /tmp/dev-container-features/python_0" did not complete successfully: exit code: 1
2025-04-17T12:03:16.8794995Z 
2025-04-17T12:03:16.8853626Z [2025-04-17T12:03:16.885Z] ------
2025-04-17T12:03:16.8856084Z  > [dev_containers_target_stage 5/5] RUN --mount=type=bind,from=dev_containers_feature_content_source,source=python_0,target=/tmp/build-features-src/python_0     cp -ar /tmp/build-features-src/python_0 /tmp/dev-container-features  && chmod -R 0755 /tmp/dev-container-features/python_0  && cd /tmp/dev-container-features/python_0  && chmod +x ./devcontainer-features-install.sh  && ./devcontainer-features-install.sh  && rm -rf /tmp/dev-container-features/python_0:
2025-04-17T12:03:16.8857638Z 68.05 installing uv...
2025-04-17T12:03:16.8857955Z 68.05 Fatal error from pip prevented installation. Full pip output in file:
2025-04-17T12:03:16.8858383Z 68.05     /usr/local/py-utils/logs/cmd_2025-04-17_12.03.15_pip_errors.log
2025-04-17T12:03:16.8858692Z 68.06 
2025-04-17T12:03:16.8858904Z 68.06 Some possibly relevant errors from pip install:
2025-04-17T12:03:16.8859466Z 68.06     ERROR: Could not find a version that satisfies the requirement uv (from versions: none)
2025-04-17T12:03:16.8860488Z 68.06     ERROR: No matching distribution found for uv
2025-04-17T12:03:16.8860793Z 68.06 Error installing uv.
2025-04-17T12:03:16.8860993Z 68.06 
2025-04-17T12:03:16.8861650Z 68.07 ERROR: Feature "Python" (Unknown) failed to install! Look at the documentation at https://github.com/devcontainers/features/tree/main/src/python for help troubleshooting this error.
2025-04-17T12:03:16.8862337Z ------

[Karthik Nadig (karthiknadig)]

The test failure seems to be caused by attempting to install uv using python 3.6. python 3.6 is deprecated and should be updated for 3.9.

[Fabrizio Cafolla (FabrizioCafolla)]

Karthik Nadig (@karthiknadig) Ok, how can we solve this? can't find the test where Python 3.6 is used

[Karthik Nadig (karthiknadig)]

Fabrizio Cafolla (@FabrizioCafolla) i think all we need to do is only install it when version of Python is greater than 3.9.

Christof Marti (@chrmarti) can you provide any guidance for this?

[Christof Marti (chrmarti)]

Maybe add a version check for Python when the util is uv here:

features/src/python/install.sh

Line 871 in 6654579

if ! type ${util} > /dev/null 2>&1; then

There already is a version check a few lines below that.

/cc Gaurav Saini (@gauravsaini04) for insights.

[Fabrizio Cafolla (FabrizioCafolla)]

Christof Marti (@chrmarti) I added a check in the code where you indicated.

[Fabrizio Cafolla (FabrizioCafolla)]

Christof Marti (@chrmarti) Karthik Nadig (@karthiknadig) any news about this pr?

[Christof Marti (chrmarti)]

Apologies for the delay. It looks like the tests fail because they need the same version check as the install script.