conda · kenodegard · Oct 13, 2023 · Oct 12, 2023 · Oct 12, 2023 · Oct 12, 2023
@@ -10,6 +10,13 @@ tags: [conda-libmamba-solver, solvers, performance]
 
 Over a year ago, the conda team at Anaconda, together with conda developers at Quansight and QuantStack, [announced the release](https://www.anaconda.com/blog/a-faster-conda-for-a-growing-community) of a new solver for conda based on the libraries that the [mamba project](https://mamba.readthedocs.io/) had developed on top of the venerable libsolv project.
 
+:::caution Update
+
+The default solver change for conda will be occurring in a __special 23.10.0 release__ (not in 23.9.0). See the special announcement [here](https://github.com/conda/conda/blob/main/CHANGELOG.md#2390-2023-09-27).
+
+:::
+
+
 ## TL;DR
 
 

@@ -0,0 +1,193 @@
+---
+title: "September 2023 Releases"
+slug: "2023-10-12-september-releases"
+description: |
+    Conda 23.9.0, conda-build 3.27.0, conda-libmamba-solver 23.9.0/23.9.1, conda-index 0.3.0, and pycosat 0.6.5/0.6.6 have been released! 🎉
+authors: [kenodegard]
+tags: [announcement, conda, conda-build, conda-libmamba-solver, conda-index, pycosat]
+---
+
+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](https://github.com/conda/conda/releases/tag/23.9.0)
+
+To update conda, run:
+```bash
+conda install -n base conda=23.9.0
+```
+
+### 📢 Special Announcement 📢
+
+:::info
+
+Conda's default solver will change to [`conda-libmamba-solver`](https://conda.github.io/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](https://conda.github.io/conda-libmamba-solver/getting-started/#usage) (e.g. by running `conda config --set solver libmamba`).
+
+The current "classic" solver is based on [pycosat](https://github.com/conda/pycosat)/[Picosat](http://fmv.jku.at/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](https://github.com/conda/conda/blob/main/CHANGELOG.md#2390-2023-09-27).
+
+<!-- truncate -->
+
+### ✨ What's New? ✨
+
+* A new "auth handler" plugin hook has been added for conda. See the new [`conda-auth`](https://github.com/conda-incubator/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](https://github.com/conda-incubator/ceps/blob/main/cep-9.md)? 🌅
+
+This is the first release of conda removing code previously marked as deprecated per the [deprecation schedule](https://github.com/conda-incubator/ceps/blob/main/cep-9.md). 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](https://github.com/conda/conda-build/releases/tag/3.27.0)
+
+To update conda-build, run:
+```bash
+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](https://github.com/conda/conda-libmamba-solver/releases/tag/23.9.0)/[23.9.1](https://github.com/conda/conda-libmamba-solver/releases/tag/23.9.1)
+
+To update conda-libmamba-solver, run:
+```bash
+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](https://github.com/conda/conda-index/releases/tag/0.3.0)
+
+To update conda-index, run:
+```bash
+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](https://github.com/conda/pycosat/releases/tag/0.6.5)/[0.6.6](https://github.com/conda/pycosat/releases/tag/0.6.6)
+
+To update conda-index, run:
+```bash
+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.
+
+* [@boldorider4](https://github.com/boldorider4) made their first contribution in [conda-build#4960](https://github.com/conda/conda-build/pull/4960)
+* [@DaveKaretnyk](https://github.com/DaveKaretnyk) made their first contribution in [conda-build#5004](https://github.com/conda/conda-build/pull/5004)
+* [@dholth](https://github.com/dholth) made their first contribution in [pycosat#54](https://github.com/conda/pycosat/pull/54)
+* [@jmcarpenter2](https://github.com/jmcarpenter2) made their first contribution in [conda#13034](https://github.com/conda/conda/pull/13034)
+* [@Mon-ius](https://github.com/Mon-ius) made their first contribution in [conda#12811](https://github.com/conda/conda/pull/12811)
+* [@otaithleigh](https://github.com/otaithleigh) made their first contribution in [conda#13035](https://github.com/conda/conda/pull/13035)
+* [@psteyer](https://github.com/psteyer) made their first contribution in [conda#11610](https://github.com/conda/conda/pull/11610)
+* [@scdub](https://github.com/scdub) made their first contribution in [conda-build#4965](https://github.com/conda/conda-build/pull/4965)
+* [@tarcisioe](https://github.com/tarcisioe) made their first contribution in [conda#9614](https://github.com/conda/conda/pull/9614)
+* [@wolfv](https://github.com/wolfv) made their first contribution in [conda#13095](https://github.com/conda/conda/pull/13095) and [conda-build#4813](https://github.com/conda/conda-build/pull/4813)
+* [@zeehio](https://github.com/zeehio) made their first contribution in [conda#13075](https://github.com/conda/conda/pull/13075)
+
+If you have ideas or want to help improve any of the conda community projects, we love to see new (and returning) contributors! 😄
@@ -29,6 +29,11 @@ jezdez:
   title: Steering council member
   url: https://github.com/jezdez
   image_url: https://github.com/jezdez.png
+kenodegard:
+  name: Ken Odegard
+  title: Conda Maintainer
+  url: https://github.com/kenodegard
+  image_url: https://github.com/kenodegard.png
 pinak-datta:
   name: Pinak Datta
   title: Intern, Google Season of Docs

@@ -1 +1 @@
-[{"title": "Conda Newsletter, Issue #2", "slug": "2023-09-19-newsletter", "description": "Upcoming Events, conda-store brief, Is conda free?, pre and post plugin hooks, Recent releases, Travis Hathaway's latest talk on Youtube.\n", "authors": ["pinak-datta"], "tags": ["conda", "newsletter"], "image": "img/blog/2023-09-19-newsletter-2/newsletter.jpg", "date": "2023-09-19T00:00:00"}, {"title": "Is conda free?", "slug": "2023-08-30-conda-is-free", "description": "Answers the frequently asked questions about what's free (almost everything), what parts of the ecosystem may not be free, and under what (clearly defined) conditions those \"maybe-not-free\" parts are free after all.\n", "authors": ["tnabtaf"], "tags": ["conda", "anaconda"], "image": null, "date": "2023-08-30T00:00:00"}, {"title": "New pre and post command plugin hooks", "slug": "2023-07-31-latest-conda-release-includes-new-plugin-hooks", "description": "The latest release of conda introduces two new plugin hooks: pre and post command. These hooks allow plugin\nauthors to execute code before and after any conda command. Learn more about how and why you would use\nthese in this post.\n", "authors": ["travishathaway"], "tags": ["conda", "plugins"], "image": null, "date": "2023-07-31T00:00:00"}, {"title": "July 2023 Releases for conda and conda-build", "slug": "2023-07-28-july-2023-releases", "description": "Conda 23.7.0, 23.7.1, 23.7.2, and conda-build 3.26.0 have been released! \ud83c\udf89\n", "authors": ["beeankha"], "tags": ["announcement", "conda", "conda-build"], "image": null, "date": "2023-07-28T00:00:00"}, {"title": "PackagingCon Call for Participation", "slug": "2023-07-25-packagingcon", "description": "PackagingCon 2023 will bring together different software packaging ecosystems to share best practices and discuss common challenges in software packaging. Abstract submission closes July 31 (!!!) and early registration ends September 8.\n", "authors": ["tnabtaf"], "tags": ["packagingcon"], "image": null, "date": "2023-07-25T00:00:00"}]
+[{"title": "September 2023 Releases", "slug": "2023-10-12-september-releases", "description": "Conda 23.9.0, conda-build 3.27.0, conda-libmamba-solver 23.9.0/23.9.1, conda-index 0.3.0, and pycosat 0.6.5/0.6.6 have been released! \ud83c\udf89\n", "authors": ["kenodegard"], "tags": ["announcement", "conda", "conda-build", "conda-libmamba-solver", "conda-index", "pycosat"], "date": "2023-10-12T00:00:00", "image": null}, {"title": "Conda Newsletter, Issue #2", "slug": "2023-09-19-newsletter", "description": "Upcoming Events, conda-store brief, Is conda free?, pre and post plugin hooks, Recent releases, Travis Hathaway's latest talk on Youtube.\n", "authors": ["pinak-datta"], "tags": ["conda", "newsletter"], "image": null, "date": "2023-09-19T00:00:00"}, {"title": "Is conda free?", "slug": "2023-08-30-conda-is-free", "description": "Answers the frequently asked questions about what's free (almost everything), what parts of the ecosystem may not be free, and under what (clearly defined) conditions those \"maybe-not-free\" parts are free after all.\n", "authors": ["tnabtaf"], "tags": ["conda", "anaconda"], "image": null, "date": "2023-08-30T00:00:00"}, {"title": "New pre and post command plugin hooks", "slug": "2023-07-31-latest-conda-release-includes-new-plugin-hooks", "description": "The latest release of conda introduces two new plugin hooks: pre and post command. These hooks allow plugin\nauthors to execute code before and after any conda command. Learn more about how and why you would use\nthese in this post.\n", "authors": ["travishathaway"], "tags": ["conda", "plugins"], "image": null, "date": "2023-07-31T00:00:00"}, {"title": "July 2023 Releases for conda and conda-build", "slug": "2023-07-28-july-2023-releases", "description": "Conda 23.7.0, 23.7.1, 23.7.2, and conda-build 3.26.0 have been released! \ud83c\udf89\n", "authors": ["beeankha"], "tags": ["announcement", "conda", "conda-build"], "image": null, "date": "2023-07-28T00:00:00"}]
Original file line number	Diff line number	Diff line change
		@@ -1 +1 @@
		[{"title": "Conda Newsletter, Issue #2", "slug": "2023-09-19-newsletter", "description": "Upcoming Events, conda-store brief, Is conda free?, pre and post plugin hooks, Recent releases, Travis Hathaway's latest talk on Youtube.\n", "authors": ["pinak-datta"], "tags": ["conda", "newsletter"], "image": "img/blog/2023-09-19-newsletter-2/newsletter.jpg", "date": "2023-09-19T00:00:00"}, {"title": "Is conda free?", "slug": "2023-08-30-conda-is-free", "description": "Answers the frequently asked questions about what's free (almost everything), what parts of the ecosystem may not be free, and under what (clearly defined) conditions those \"maybe-not-free\" parts are free after all.\n", "authors": ["tnabtaf"], "tags": ["conda", "anaconda"], "image": null, "date": "2023-08-30T00:00:00"}, {"title": "New pre and post command plugin hooks", "slug": "2023-07-31-latest-conda-release-includes-new-plugin-hooks", "description": "The latest release of conda introduces two new plugin hooks: pre and post command. These hooks allow plugin\nauthors to execute code before and after any conda command. Learn more about how and why you would use\nthese in this post.\n", "authors": ["travishathaway"], "tags": ["conda", "plugins"], "image": null, "date": "2023-07-31T00:00:00"}, {"title": "July 2023 Releases for conda and conda-build", "slug": "2023-07-28-july-2023-releases", "description": "Conda 23.7.0, 23.7.1, 23.7.2, and conda-build 3.26.0 have been released! \ud83c\udf89\n", "authors": ["beeankha"], "tags": ["announcement", "conda", "conda-build"], "image": null, "date": "2023-07-28T00:00:00"}, {"title": "PackagingCon Call for Participation", "slug": "2023-07-25-packagingcon", "description": "PackagingCon 2023 will bring together different software packaging ecosystems to share best practices and discuss common challenges in software packaging. Abstract submission closes July 31 (!!!) and early registration ends September 8.\n", "authors": ["tnabtaf"], "tags": ["packagingcon"], "image": null, "date": "2023-07-25T00:00:00"}]
		[{"title": "September 2023 Releases", "slug": "2023-10-12-september-releases", "description": "Conda 23.9.0, conda-build 3.27.0, conda-libmamba-solver 23.9.0/23.9.1, conda-index 0.3.0, and pycosat 0.6.5/0.6.6 have been released! \ud83c\udf89\n", "authors": ["kenodegard"], "tags": ["announcement", "conda", "conda-build", "conda-libmamba-solver", "conda-index", "pycosat"], "date": "2023-10-12T00:00:00", "image": null}, {"title": "Conda Newsletter, Issue #2", "slug": "2023-09-19-newsletter", "description": "Upcoming Events, conda-store brief, Is conda free?, pre and post plugin hooks, Recent releases, Travis Hathaway's latest talk on Youtube.\n", "authors": ["pinak-datta"], "tags": ["conda", "newsletter"], "image": null, "date": "2023-09-19T00:00:00"}, {"title": "Is conda free?", "slug": "2023-08-30-conda-is-free", "description": "Answers the frequently asked questions about what's free (almost everything), what parts of the ecosystem may not be free, and under what (clearly defined) conditions those \"maybe-not-free\" parts are free after all.\n", "authors": ["tnabtaf"], "tags": ["conda", "anaconda"], "image": null, "date": "2023-08-30T00:00:00"}, {"title": "New pre and post command plugin hooks", "slug": "2023-07-31-latest-conda-release-includes-new-plugin-hooks", "description": "The latest release of conda introduces two new plugin hooks: pre and post command. These hooks allow plugin\nauthors to execute code before and after any conda command. Learn more about how and why you would use\nthese in this post.\n", "authors": ["travishathaway"], "tags": ["conda", "plugins"], "image": null, "date": "2023-07-31T00:00:00"}, {"title": "July 2023 Releases for conda and conda-build", "slug": "2023-07-28-july-2023-releases", "description": "Conda 23.7.0, 23.7.1, 23.7.2, and conda-build 3.26.0 have been released! \ud83c\udf89\n", "authors": ["beeankha"], "tags": ["announcement", "conda", "conda-build"], "image": null, "date": "2023-07-28T00:00:00"}]