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September 2023 Releases

· 6 min read
Ken Odegard

The September 2023 releases included updates to five conda community projects: conda, conda-build, conda-libmamba-solver, conda-index, and pycosat! 🎉 Each of these have been released to both main and conda-forge.

Changes in Conda 23.9.0​

To update conda, run:

conda install -n base conda=23.9.0

📢 Special Announcement 📢​

info

Conda's default solver will change to conda-libmamba-solver in a special 23.10.0 release in the near future!

You can already benefit from conda-libmamba-solver today by configuring your conda installation to use it (e.g. by running conda config --set solver libmamba).

The current "classic" solver is based on pycosat/Picosat and will remain part of conda for the foreseeable future. A fallback is possible and available.

Additional details on this change as well as the full announcement can be found in the conda 23.9.0 changelog.

✨ What's New? ✨​

  • A new "auth handler" plugin hook has been added for conda. See the new conda-auth plugin for an example.
  • Index cache metadata is locked by default; a --no-lock option is also now available.
  • A new context.register_envs option can control whether to register environments in ~/.conda/environments.txt when they are created. Defaults to true.
  • New detailed output verbosity level (i.e., the old debug level -vv is now -vvv).
  • Support for truststore to the ssl_verify config option has been added, enabling conda to use the operating system certificate store (requires Python 3.10 or later).
  • emscripten-wasm32 and wasi-wasm32 platforms are now supported.

🔧 What Got Fixed? 🔧​

  • conda env create checks the directory permissions when using pip dependencies before writing to disk.
  • InsecureRequestWarning for JLAP is hidden when CONDA_SSL_VERIFY=false, matching non-JLAP behavior.
  • The ability to create a conda environment with a colon in the prefix is no longer allowed.
  • AttributeError logging response with nonexistent request has been fixed when using JLAP with file:/// URIs.
  • For cleaner logs, progress bars no longer show up in non-interactive runs.
  • --json and --debug default to NULL so as to not override CONDA_JSON and CONDA_DEBUG environment variables.
  • Fixed conda remove --all --json output.
  • Test data has been updated to stop triggering security scanners' false-positives.
  • No more performance regression of basic commands (e.g., conda info) on WSL.
  • Conda is now configured to ignore "Retry-After" header to avoid the scenarios when this value is very large and causes conda to hang indefinitely.
  • JSONDecodeError on repodata.info.json is treated as a warning, equivalent to a missing repodata.info.json.
  • Fixed sorting error for conda config --show-sources --json.
  • OSError in find_commands is now detected to account for incorrect PATH entries on Windows.
  • conda env update --prune uses only the specs coming from environment.yml file and ignores the history specs.

🌅 What's Marked for Deprecation? 🌅​

This is the first release of conda removing code previously marked as deprecated per the deprecation schedule. The following is a list of what was removed:

  • conda.another_unicode()
  • conda._vendor.toolz
  • conda._vendor.tqdm
  • conda.auxlib.decorators.memoized
  • conda.base.context.Context.experimental_solver
  • conda.base.context.Context.conda_private
  • conda.base.context.Context.cuda_version
  • conda.base.context.get_prefix()
  • conda.cli.common.ensure_name_or_prefix()
  • --experimental-solver
  • conda.common.cuda
  • conda.common.path.explode_directories(already_split)
  • conda.common.url.escape_channel_url()
  • conda.core.index.check_whitelist()
  • conda.core.solve._get_solver_class()
  • conda.core.subdir_data.read_mod_and_etag()
  • conda.gateways.repodata.RepodataState.load()
  • conda.gateways.repodata.RepodataState.save()
  • conda.lock
  • conda_env.cli.common.stdout_json()
  • conda_env.cli.common.get_prefix()
  • conda_env.cli.common.find_prefix_name()

Changes in Conda-Build 3.27.0​

To update conda-build, run:

conda install -n base conda-build=3.27.0

✨ What's New? ✨​

  • Removed glob2 dependency.
  • emscripten-wasm32 and wasi-wasm32 platforms are now supported.

🔧 What Got Fixed? 🔧​

  • Imports in conda command plugins are delayed until the command is used, avoiding import-time side effects.

📄 What's New in Documentation? 📄​

  • Improved formatting of ~= (compatibility release) match spec.
  • Docs now clarify that the build prefix is activated after the host prefix.
  • An explanation has been added stating that conda-build should be run from the base environment.

Changes in Conda-Libmamba-Solver 23.9.0/23.9.1​

To update conda-libmamba-solver, run:

conda install -n base conda-libmamba-solver=23.9.1

✨ What's New? ✨​

  • Increased performance of notify_conda_outdated logic.
  • Libmamba's repoquery search features are now exposed as a conda subcommand plugin.
  • How tasks for libsolv are created has been rewritten, making use of libmamba's add_pin features (requires libmambapy >=1.5.1).
  • Name-only pins now lock the corresponding package if installed.
  • The .solv cache for repodata is used if available and recent.

🔧 What Got Fixed? 🔧​

  • The solver no longer bounces between two compatible solutions when the same command is run twice in a row.
  • Commands with no channels passed are handled gracefully.
  • Workaround added for missing noarch field in returned PackageRecord payload.
  • A bug where the --prune flag was not working correctly in conda env update commands has been fixed.
  • Environments are no longer aggressively updated to higher priority channels under certain conditions.
  • No more injection of channels from installed packages that do not exist or are unavailable.
  • All configured channels in PackagesNotFoundError exceptions print correctly.
  • No more crashes when a MatchSpec with a build string is specified in the CLI and there's a pinned spec for the same package name.
  • defaults::pkg workarounds are only applied for the default value default_channels.
  • Users won't be able to override pinned specs with incompatible CLI specs anymore. Instead, they must modify their pinned specs explicitly.

📄 What's New in Documentation? 📄​

  • Intentional deviations from conda's classic solver behavior are now documented.

Changes in Conda-Index 0.3.0​

To update conda-index, run:

conda install -n base conda-index=0.3.0

✨ What's New? ✨​

  • --run-exports has been added to generate CEP-12 compliant run_exports.json documents for each subdir.
  • Pretty-print repodata.json is no longer default, saving time and space.
  • Version requirement: conda >= 4.14.

Changes in Pycosat 0.6.5/0.6.6​

To update conda-index, run:

conda install -n base pycosat=0.6.6

✨ What's New? ✨​

  • Pycosat 0.6.4 accidentally did not include the changes intended to be released. Pycosat 0.6.5 includes those changes.
  • PyMem_Calloc() is utilized in order to initialize memory to 0.

We ❤️ Our Community​

Altogether, we had 11 (!) new contributors this release cycle; thank you to all of our open source community members for helping making these improvements possible.

If you have ideas or want to help improve any of the conda community projects, we love to see new (and returning) contributors! 😄