Bump virtualenv from 20.39.0 to 21.0.0

[dependabot]

Bumps virtualenv from 20.39.0 to 21.0.0.

Release notes

Sourced from virtualenv's releases.

21.0.0

What's Changed

• ♻️ refactor(discovery): extract py_discovery as self-contained package by @​gaborbernat in pypa/virtualenv#3070
• 📝 docs(changelog): add removal entry for python-discovery extraction by @​gaborbernat in pypa/virtualenv#3074

Full Changelog: pypa/virtualenv@20.39.1...21.0.0

20.39.1

What's Changed

• Align dependency versions across projects by @​gaborbernat in pypa/virtualenv#3069
• ✨ feat(create): add RustPython support by @​gaborbernat in pypa/virtualenv#3071
• 🐛 fix(create): add pythonw3.exe to Windows venvs by @​gaborbernat in pypa/virtualenv#3073

Full Changelog: pypa/virtualenv@20.39.0...20.39.1

Changelog

Sourced from virtualenv's changelog.

Deprecations and Removals - 21.0.0

• The Python discovery logic has been extracted into a standalone python-discovery package on PyPI (documentation <https://python-discovery.readthedocs.io/>_) and is now consumed as a dependency. If you previously imported discovery internals directly (e.g. from virtualenv.discovery.py_info import PythonInfo), switch to from python_discovery import PythonInfo. Backward-compatibility re-export shims are provided at virtualenv.discovery.py_info, virtualenv.discovery.py_spec, and virtualenv.discovery.cached_py_info, however these are considered unsupported and may be removed in a future release - by :user:gaborbernat. (:issue:3070)

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v20.39.1 (2026-02-25)

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Features - 20.39.1

• Add support for creating virtual environments with RustPython - by :user:elmjag. (:issue:3010)

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v20.39.0 (2026-02-23)

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Commits

• 7687420 release 21.0.0
• 8ec3142 📝 docs(changelog): add removal entry for python-discovery extraction (#3074)
• f89d46c ♻️ refactor(discovery): extract py_discovery as self-contained package (#3070)
• 0272c72 release 20.39.1
• b1ca37f 🐛 fix(create): add pythonw3.exe to Windows venvs (#3073)
• 1d4a338 ✨ feat(create): add RustPython support (#3071)
• a10c5d4 Align dependency versions across projects (#3069)
• 22a8860 [pre-commit.ci] pre-commit autoupdate (#3068)
• See full diff in compare view

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[github-actions]

🤖 Claude Code Review

Code Review

PR Summary: Bumps virtualenv from 20.39.0 to 21.0.0 in pyproject.toml.

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Code Quality

• ✅ Single-line change, no style issues
• ✅ No commented-out code
• ✅ No variable names involved
• ✅ DRY principle not applicable
• ✅ No logic changes; no defects introduced
• ✅ CLAUDE.md is general and environment-agnostic

Testing

• ✅ No new functions; no tests required
• ⚠️ Note: virtualenv is a development dependency — the major version bump (20.x → 21.x) could introduce breaking changes in CI or dev workflows. Verify that existing tests still pass with the new version.

Documentation

• ✅ README/API docs do not require updates for a dev dependency bump
• ❌ CHANGELOG.md — if this project maintains a changelog, this dependency update should be noted there. (Unable to verify if CHANGELOG exists in this diff.)
• ✅ No markdown changes to review

Security

• ✅ No hardcoded credentials
• ✅ No input validation concerns
• ✅ No error handling changes
• ✅ No sensitive data in logs
• ✅ No .lic files or AQAAAD-prefixed content

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Overall: Minor concern on the major version bump — virtualenv 21.x may have breaking changes vs 20.x. Recommend confirming CI passes and reviewing the virtualenv changelog for any breaking changes before merging.

Automated code review analyzing defects and coding standards

[github-actions]

🤖 Claude Code Review

PR Code Review

Diff Summary: Bumps virtualenv from 20.39.0 to 21.0.0 in pyproject.toml (development dependency).

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Code Quality

• ✅ Style guide: Single-line change follows existing formatting conventions.
• ✅ No commented-out code
• ✅ Meaningful variable names: N/A
• ✅ DRY principle: N/A
• ✅ Defects: No logic errors. This is a straightforward dependency bump. Note that 21.0.0 is a major version bump — verify that no breaking changes in virtualenv affect the development/CI workflow.

Testing

• ❌ Unit/integration tests: No tests included, but none are expected for a dependency version bump.
• ⚠️ Test coverage: Cannot assess from this diff alone — CI should validate that existing tests still pass against the new virtualenv version.

Documentation

• ✅ README: No update needed for a dev dependency bump.
• ✅ CHANGELOG.md: Not updated — acceptable for automated dependency bumps (typically handled by Dependabot/Renovate without manual changelog entries).
• ✅ Markdown formatting: N/A

Security

• ✅ No hardcoded credentials
• ✅ No sensitive data
• ✅ No license files (.lic) or AQAAAD strings
• ✅ Dependency update: Keeping virtualenv up to date is a security best practice.

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Summary

Approve with note. This is a clean, automated dependency bump. The only item worth verifying manually: virtualenv 21.0.0 is a major version bump — confirm CI passes and that the new version has no breaking changes that affect your development tooling or build scripts.

Automated code review analyzing defects and coding standards