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PYTHON-6084 Streamline Evergreen Python interpreter selection for uv - #3074
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🔵 Needs a closer look
Cross-platform interpreter resolution depends on real Evergreen host layouts and uv behavior that requires final human validation.
Review effort: Balanced
Findings: None
What changed in this PR
Standardizes Evergreen Python selection around uv-native configuration without changing driver code.
Changes:
- Adds cross-platform toolchain discovery and managed-Python fallback.
- Migrates generated tasks from
TOOLCHAIN_VERSIONtoUV_PYTHON. - Propagates, scrubs, logs, and documents the new uv environment variables.
| File | Description |
|---|---|
pr-body.md |
Documents implementation and validation. |
CONTRIBUTING.md |
Updates Python-selection guidance. |
.evergreen/scripts/utils.py |
Scrubs uv Python variables from subprocesses. |
.evergreen/scripts/setup-uv-python.sh |
Implements interpreter selection and fallback. |
.evergreen/scripts/setup_tests.py |
Propagates and adjusts uv settings. |
.evergreen/scripts/generate_config.py |
Migrates generated task variables. |
.evergreen/scripts/generate_config_utils.py |
Recognizes UV_PYTHON in names. |
.evergreen/run-tests.sh |
Logs interpreter search configuration. |
.evergreen/generated_configs/tasks.yml |
Regenerates task Python variables. |
.evergreen/generated_configs/functions.yml |
Regenerates function expansion lists. |
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sleepyStick
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PYTHON-6084
Changes in this PR
Standardizes Evergreen Python selection for uv. Always use
UV_PYTHON(default 3.10) withUV_PYTHON_SEARCH_PATH/UV_PYTHON_PREFERENCEpointing uv at the toolchain, falling back to uv-managed downloads otherwise.The majority of the change is the regenerated tasks switching
TOOLCHAIN_VERSIONwithUV_PYTHON.Test Plan
Regenerated config is byte-identical; script logic exercised directly (defaults, free-threaded fallback, platform dirs); Evergreen tasks run on this PR.
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