23.12.0

Enhancements

• Add some boundary checks to CONDA_LIBMAMBA_SOLVER_MAX_ATTEMPTS. (#394, #403)

Bug fixes

• Instantiate IndexHelper in offline mode for compatibility with conda-build. Otherwise
  the index can get out of sync during long build processes. (#386 via #395)

Docs

• Use new conda-sphinx-theme for documentation site. (#367 via #370)
• Reorganize the layout of the documentation site. (#370)

Contributors

• @dholth
• @jaimergp
• @jezdez
• @travishathaway made their first contribution in #370

23.11.1

23.11.1 (2023-11-16)

Enhancements

• Raise a friendlier InvalidSpec error instead of RuntimeError when libmamba detects a problem in the configured solver jobs. (#352 via #357)
• Ensure specs, SolverInputState.installed and SolverInputState.virtual containers are consistently sorted. (#378)

Bug fixes

• Configure pinned specs just once to avoid solver bugs related with their persistence (i.e. inability to downgrade environments if pinned specs are present and a transient dependency needs to be removed). (#354 via #355)
• Detect whether a channel is part of a multichannel so the latter is used in the PackageRecord entries for conda-build. Fixes an issue with conda-build and custom multichannels. (#363 via #365)
• Allow authenticated URLs in default_channels and other multichannels. (#364 via #366)
• Preserve authentication while reloading local channels. (#366)

Contributors

• @jaimergp

23.11.0

Bug fixes

• Do not use libmamba's default signal handler so users can Ctrl-C from conda. (#337 via #340)
• Defer conda-build-specific exception definition and import until it is needed by the solver. (#342)
• Interpret "excluded by strict priority" solver errors as proper satisfiability conflicts and avoid printing related yet uninformative warnings. (#343)
• Ensure that historic specs are kept in the environment, even if that means raising a conflict. (#341 via #345)

Docs

• Document environment variables used for advanced configuration. (#349)

Other

• Require libmambapy >=1.5.3 for improved signal handling and MatchSpec syntax compliance. (#347)

Contributors

• @dholth
• @jaimergp
• @jezdez

23.9.3

Bug fixes

• Massage bracket-containing specs (e.g. ca-certificates[version='>=2023']) so they are understood by libmambapy.Query, fixing a bug where conda would erroneously complain about no package records matching the configured pinned specs. (#327 via #328)

Contributors

• @jaimergp

Full Changelog: 23.9.2...23.9.3

23.9.2

Bug fixes

• Use the conda version reported at runtime (instead of the one reported by conda list) to figure out whether there are conda updates available. (#316)
• Allow the index to be empty in --offline runs with no local cache available for the configured channels. (#323)

Contributors

• @costrouc
• @jaimergp

23.9.1

Enhancements

• Increase performance of notify_conda_outdated logic. (#298)

Bug fixes

• Prevent solver from bouncing between two compatible solutions when the same command is run twice in a row. (#302)

Contributors

• @costrouc
• @jaimergp

23.9.0

Enhancements

• Expose libmamba's repoquery search features as a conda subcommand plugin. (#258)
• Rewrite how we create tasks for libsolv, making use of libmamba's add_pin features. Requires libmambapy >=1.5.1. (#270, #288)
• Name-only pins will lock the corresponding package if installed. (conda#13031 via #289)
• Use the .solv cache for repodata if available and recent. (#295)

Bug fixes

• Handle commands with no channels passed gracefully. (#256)
• Workaround for missing noarch field in returned PackageRecord payload. (#257)
• Port logic from conda/conda#9614, which fixes
  a bug where the --prune flag was not working correctly in conda env update commands.
  (#270)
• Ensure environments are not aggressively updated to higher priority channels under some conditions. (#240 via #270, #285)
• Do not inject those channels from installed packages that do not exist or are unavailable. (#262 via #274)
• Correctly print all configured channels in PackagesNotFoundError exceptions. (#284)
• Do not crash if a MatchSpec with a build string is specified in the CLI and there's a pinned spec for the same package name. (#286 via #289)
• Only apply defaults::pkg workarounds for the default value default_channels. (#292)

Deprecations

• Users won't be able to override pinned specs with incompatible CLI specs anymore. Instead they must modify their pinned specs explicitly. (conda#9016 via #289, #294)

Docs

• Document intentional deviations from conda's classic solver behavior. (#289)

Other

• Explain why defaults::pkg_name is broken libmamba 1.5.x (details). (#266)

23.7.0

Enhancements

• Add basic integrations for local channels in conda-build. (#194)

Bug fixes

• Add backwards-compatible support for the new namespaced settings in libmamba.Context. (#192 via #193)
• Fixes an error where a user-supplied package in the CLI would get dropped if the argument happened to match a larger string in the argument list. (#221 via #222)
• Fix authentication in package downloads. (#216 via #226)
• Fix unhandled channels coming from injected virtual packages in conda-lock. (#230 via #234)
• Handle URL-encoded channels correctly with recent libmamba versions. (#247 via #248)

Docs

• Added notes about development workflows with libmamba from source. (#191)

Other

• Adding libmamba/libmambapy as development dependencies within docker images. (#191)

Contributors

• @costrouc
• @jaimergp
• @conda-bot
• @pre-commit-ci[bot]

23.5.0

Enhancements

• Provide a CONDA_LIBMAMBA_SOLVER_NO_CHANNELS_FROM_INSTALLED environment variable to prevent
  channels from being injected from installed packages. This is useful for air-gapped environments
  where outside channels are not available. (#108 via #184)
• Simplify libmambapy.Context initialization so we only set the bits that we use. (#209)
• Use the new RepoInterface and remove the SubdirData subclass workarounds, which requires conda 23.5.0.
  (#210)

Bug fixes

• Fix an issue where running conda update <package> would result in the package being downgraded if no newer versions were available. (#71 via #158)
• Ensure unauthenticated channels are not re-injected in the channel lists from installed packages
  if an authenticated equivalent is already present. (#108 via #184)
• Honor context.repodata_threads. (#200)
• Do not set quiet manually when context.json is true. (#187)

Deprecations

• Remove unneeded user-agent tests. (#183)

Docs

• Document known solver behavior differences. (#115, #131 via #197)
• Update development docs to reflect changes in build system and other inaccuracies. (#208)

Other

• Add tests reproducing the known solver differences. (#115, #131 via #197)
• Skip tests on libmamba 1.4.2 temporarily to workaround some test failures. Tracked by #186. (#187)

Contributors

• @jakirkham made their first contribution in #189
• @costrouc
• @jaimergp
• @jezdez
• @kenodegard
• @conda-bot
• @pre-commit-ci[bot]

23.3.0

Enhancements

• Simplify exception parsing and enable new (experimental) conflict reports in libmamba. (#102 via #103, #160)
• Use conda's SubdirData for all repodata fetching and caching. (#59, #68 via #65, #171)

Bug fixes

• Disable lockfiles within libmambapy to conform with conda's behavior of not using them. (#120)
• Fix JSON serialization errors in some exceptions. (#140 via #142)
• Fix API breakage upstream: SubdirData.cache_path_json property changed from str to PrefixPath. Depend directly on boltons.setutils.IndexedSet. (#151)
• Updated bundled conda recipe and corresponding CI workflow. (#166)
• Bumped minimum conda version from 22.11.1 -> 23.3.0 due to change in boltons IndexedSet. (#170)
• Add workaround for defaults::<pkg_name> specs. (#173 via #172)

Deprecations

• Python 3.7 is no longer supported. The minimum version is now 3.8. (#174)

Other

• Change the build-system to hatchling + hatch-cvs for a setuptools-scm-like versioning setup. (#128 via #127)
• Add conda-forge based CI environments. (#133)
• Fix cache directory in flaky test. (#157)
• CI: Pin minio to 2023-03-13T19-46-17Z to avoid breaking changes. (#159)
• Require libmamba 1.4.1 or greater and remove unused code paths. (#165)

Contributors

• @AlbertDeFusco made their first contribution in #142
• @costrouc
• @jaimergp
• @jezdez
• @conda-bot
• @pre-commit-ci[bot]

Full Changelog: 23.1.0...23.3.0