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May Releases for Conda, Conda-Build, and Conda-Libmamba-Solver

· 5 min read
Bianca Henderson
Bianca Henderson
Conda maintainer 🐍📦

May releases are here! 🎊 Conda 23.5.0, conda-build 3.25.0, and conda-libmamba-solver 23.5.0 are now available on both main and conda-forge:

Changes in Conda​

To update conda, run:

conda install -n base conda=23.5.0

✨ What's New? ✨​

The long-awaited conda doctor subcommand plugin has been implemented! The related conda issue is over nine years old and has been a regularly requested feature. The conda doctor command enables conda users to detect any packages with files missing (i.e., corrupt packages) in their conda environment.

Additionally, the following features and changes can be found in conda 23.5.0:

  • conda list --reverse is a new option for the conda list command which returns a reversed list of installed packages.
  • Folks who have signature verification enabled will get warnings instead of an info-level message about misconfiguration.
  • More functional tests have been added around conda's content trust code.
  • For our build system, we switched from setup.py to pyproject.toml and use Hatchling.
  • Which Python modules get imported during conda activate calls are now optimized for speed.
  • The conda_cli pytest fixture has been added in order to replace conda.testing.helpers.run_inprocess_conda_command and conda.testing.integration.run_command.
  • The tmp_env pytest fixture has been added in order to replace conda.testing.integration.make_temp_env.
  • The path_factory pytest fixture has been added to replace custom prefix logic like conda.testing.integration._get_temp_prefix and conda.testing.integration.make_temp_prefix.
  • All three of the above pytest fixtures have been documented in the article Integration Tests.
  • The way that the Activator classes are defined in conda/activate.py has been refactored.
  • The index cache metadata file .state.json was renamed to .info.json to track draft Repodata Metadata .info.json CEP.
  • Improved cache locking and logging when using jlap.
  • The project's README example has changed from IPython Notebook and NumPy to PyTorch.
  • Retry language in flexible solve and repodata logs are now more user friendly.
  • Python 3.11 is now supported.

🔧 What Got Fixed? 🔧​

The following bug fixes were implemented in the 23.5.0 version of conda:

  • conda clean no longer fails if it was unable to get the file stats.
  • If conda.deprecations.DeprecationHandler receives a bad version, a fallback version is provided.
  • The default value for defaults includes msys2 when context.subdir is win-* on non-Windows platforms.
  • TypeErrors are avoided when non-string types are written to the index cache metadata.
  • conda.core.package_cache_data.UrlsData.get_url no longer fails when package_path has a .conda extension.
  • No more pre-converting of paths to Unix style on Windows in conda.sh; this done to make them prefix-replaceable upon installation.

🌅 What's Marked for Deprecation? 🌅​

The following modules and functions were marked for deprecation:

Changes in Conda-Build​

To update conda-build, run:

conda install -n base conda-build=3.25.0

✨ What's New? ✨​

In the latest version of conda-build, noarch packages that use virtual packages can now be added to the hash contents of a package. This facilitates the building of noarch packages multiple times for different platforms with platform-specific dependencies. In conda-build 3.25.0, different variants can be built for __linux, __osx, or __win and get non-clashing package file names.

Additionally, the following features and changes can be found in conda-build 3.25.0:

  • Support for svn source credentials (svn_username and svn_password).
  • Standalone conda-index is now utilized instead of bundled indexing code.
  • For our build system, we switched from setup.py to pyproject.toml and use Hatchling.
  • Minor code simplification for conda_build.index.ChannelIndex._ensuredirs.
  • xattr test is enabled on MacOS.
  • Python 3.11 is now supported.

🔧 What Got Fixed? 🔧​

The following bug fixes were implemented in the 3.25.0 version of conda-build:

  • tests/commands can also run in the presence of run_test.*.
  • When rendering a recipe that uses the load_file_data Jinja2 function, the source is now required.
  • Download packages during build into the correct subdir folder.
  • A unique subdir variable name is used when rebuilding the index for multi-output builds, which fixes an error that occurs during true cross-compilation of osx-arm64 packages from osx-64.

🌅 What's Marked for Deprecation? 🌅​

Changes in Conda-Libmamba-Solver​

To update conda-libmamba-solver, run:

conda install -n base conda-libmamba-solver=23.5.0

✨ What's New? ✨​

Amongst other improvements and bug fixes, the latest version of the conda-libmamba-solver provides a CONDA_LIBMAMBA_SOLVER_NO_CHANNELS_FROM_INSTALLED environment variable to prevent channels from being injected from installed packages, which is useful for air-gapped environments where external channel servers are not reachable.

Additionally, the following features and changes can be found in conda-libmamba-solver 23.5.0:

  • Simplify libmambapy.Context initialization so that we only set the parts that we use.
  • Use the new RepoInterface and remove the SubdirData subclass workarounds, which requires conda 23.5.0.
  • Known solver behavior differences are now documented.
  • Development docs have been updated to reflect changes in build system and other inaccuracies.
  • Tests reproducing the known solver differences were added.
  • Some tests on libmamba 1.4.2 are now skipped temporarily to workaround some test failures.

🔧 What Got Fixed? 🔧​

The following bug fixes were implemented in the 23.5.0 version of conda-libmamba-solver:

  • An issue where running conda update <package> would result in the package being downgraded if no newer versions were available has been fixed.
  • conda-libmamba-solver 23.5.0 ensures that unauthenticated channels are not re-injected in the channel lists from installed packages if an authenticated equivalent is already present.
  • context.repodata_threads are honored.

🌅 What's Marked for Deprecation? 🌅​

  • Unnecessary user-agent tests were removed.