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Merge pull request #13804 from NixOS/release-notes
Release notes for Nix 2.31
This commit is contained in:
Eelco Dolstra
GitHub
commit
9c6019dd1a
9 changed files with 133 additions and 38 deletions
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@ -1,6 +0,0 @@
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---
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synopsis: "`build-cores = 0` now auto-detects CPU cores"
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prs: [13402]
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---
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When `build-cores` is set to `0`, nix now automatically detects the number of available CPU cores and passes this value via `NIX_BUILD_CORES`, instead of passing `0` directly. This matches the behavior when `build-cores` is unset. This prevents the builder from having to detect the number of cores.
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@ -1,11 +0,0 @@
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---
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synopsis: "Fix Git LFS SSH issues"
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prs: [13743]
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issues: [13337]
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---
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Fixed some outstanding issues with Git LFS and SSH.
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* Added support for `NIX_SSHOPTS`.
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* Properly use the parsed port from URL.
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* Better use of the response of `git-lfs-authenticate` to determine API endpoint when the API is not exposed on port 443.
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@ -1,13 +0,0 @@
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---
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synopsis: "Add support for user@address:port syntax in store URIs"
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prs: [3425]
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issues: [7044]
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---
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It's now possible to specify the port used for the SSH stores directly in the store URL in accordance with [RFC3986](https://datatracker.ietf.org/doc/html/rfc3986). Previously the only way to specify custom ports was via `ssh_config` or `NIX_SSHOPTS` environment variable, because Nix incorrectly passed the port number together with the host name to the SSH executable. This has now been fixed.
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This change affects [store references](@docroot@/store/types/index.md#store-url-format) passed via the `--store` and similar flags in CLI as well as in the configuration for [remote builders](@docroot@/command-ref/conf-file.md#conf-builders). For example, the following store URIs now work:
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- `ssh://127.0.0.1:2222`
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- `ssh://[b573:6a48:e224:840b:6007:6275:f8f7:ebf3]:22`
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- `ssh-ng://[b573:6a48:e224:840b:6007:6275:f8f7:ebf3]:22`
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@ -1,6 +0,0 @@
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---
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synopsis: "Represent IPv6 RFC4007 ZoneId literals in conformance with RFC6874"
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prs: [13445]
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---
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Prior versions of Nix since [#4646](https://github.com/NixOS/nix/pull/4646) accepted [IPv6 scoped addresses](https://datatracker.ietf.org/doc/html/rfc4007) in URIs like [store references](@docroot@/store/types/index.md#store-url-format) in the textual representation with a literal percent character: `[fe80::1%18]`. This was ambiguous, because the the percent literal `%` is reserved by [RFC3986](https://datatracker.ietf.org/doc/html/rfc3986), since it's used to indicate percent encoding. Nix now requires that the percent `%` symbol is percent-encoded as `%25`. This implements [RFC6874](https://datatracker.ietf.org/doc/html/rfc6874), which defines the representation of zone identifiers in URIs. The example from above now has to be specified as `[fe80::1%2518]`.
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@ -138,6 +138,7 @@
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- [Contributing](development/contributing.md)
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- [Releases](release-notes/index.md)
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{{#include ./SUMMARY-rl-next.md}}
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- [Release 2.31 (2025-08-21)](release-notes/rl-2.31.md)
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- [Release 2.30 (2025-07-07)](release-notes/rl-2.30.md)
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- [Release 2.29 (2025-05-14)](release-notes/rl-2.29.md)
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- [Release 2.28 (2025-04-02)](release-notes/rl-2.28.md)
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96
doc/manual/source/release-notes/rl-2.31.md
Normal file
96
doc/manual/source/release-notes/rl-2.31.md
Normal file
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@ -0,0 +1,96 @@
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# Release 2.31.0 (2025-08-21)
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- `build-cores = 0` now auto-detects CPU cores [#13402](https://github.com/NixOS/nix/pull/13402)
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When `build-cores` is set to `0`, Nix now automatically detects the number of available CPU cores and passes this value via `NIX_BUILD_CORES`, instead of passing `0` directly. This matches the behavior when `build-cores` is unset. This prevents the builder from having to detect the number of cores.
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- Fix Git LFS SSH issues [#13337](https://github.com/NixOS/nix/issues/13337) [#13743](https://github.com/NixOS/nix/pull/13743)
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Fixed some outstanding issues with Git LFS and SSH.
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* Added support for `NIX_SSHOPTS`.
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* Properly use the parsed port from URL.
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* Better use of the response of `git-lfs-authenticate` to determine API endpoint when the API is not exposed on port 443.
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- Add support for `user@address:port` syntax in store URIs [#7044](https://github.com/NixOS/nix/issues/7044) [#3425](https://github.com/NixOS/nix/pull/3425)
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It's now possible to specify the port used for SSH stores directly in the store URL in accordance with [RFC3986](https://datatracker.ietf.org/doc/html/rfc3986). Previously the only way to specify custom ports was via `ssh_config` or the `NIX_SSHOPTS` environment variable, because Nix incorrectly passed the port number together with the host name to the SSH executable.
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This change affects [store references](@docroot@/store/types/index.md#store-url-format) passed via the `--store` and similar flags in CLI as well as in the configuration for [remote builders](@docroot@/command-ref/conf-file.md#conf-builders). For example, the following store URIs now work:
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- `ssh://127.0.0.1:2222`
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- `ssh://[b573:6a48:e224:840b:6007:6275:f8f7:ebf3]:22`
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- `ssh-ng://[b573:6a48:e224:840b:6007:6275:f8f7:ebf3]:22`
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- Represent IPv6 RFC4007 ZoneId literals in conformance with RFC6874 [#13445](https://github.com/NixOS/nix/pull/13445)
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Prior versions of Nix since [#4646](https://github.com/NixOS/nix/pull/4646) accepted [IPv6 scoped addresses](https://datatracker.ietf.org/doc/html/rfc4007) in URIs like [store references](@docroot@/store/types/index.md#store-url-format) in the textual representation with a literal percent character: `[fe80::1%18]`. This was ambiguous, because the the percent literal `%` is reserved by [RFC3986](https://datatracker.ietf.org/doc/html/rfc3986), since it's used to indicate percent encoding. Nix now requires that the percent `%` symbol is percent-encoded as `%25`. This implements [RFC6874](https://datatracker.ietf.org/doc/html/rfc6874), which defines the representation of zone identifiers in URIs. The example from above now has to be specified as `[fe80::1%2518]`.
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- Use WAL mode for SQLite cache databases [#13800](https://github.com/NixOS/nix/pull/13800)
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Previously, Nix used SQLite's "truncate" mode for caches. However, this could cause a Nix process to block if another process was updating the cache. This was a problem for the flake evaluation cache in particular, since it uses long-running transactions. Thus, concurrent Nix commands operating on the same flake could be blocked for an unbounded amount of time. WAL mode avoids this problem.
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This change required updating the versions of the SQLite caches. For instance, `eval-cache-v5.sqlite` is now `eval-cache-v6.sqlite`.
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- Enable parallel marking in bdwgc [#13708](https://github.com/NixOS/nix/pull/13708)
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Previously marking was done by only one thread, which takes a long time if the heap gets big. Enabling parallel marking speeds up evaluation a lot, for example (on a Ryzen 9 5900X 12-Core):
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* `nix search nixpkgs` from 24.3s to 18.9s.
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* Evaluating the `NixOS/nix/2.21.2` flake regression test from 86.1s to 71.2s.
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- New command `nix flake prefetch-inputs` [#13565](https://github.com/NixOS/nix/pull/13565)
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This command fetches all inputs of a flake in parallel. This can be a lot faster than the serialized on-demand fetching during regular flake evaluation. The downside is that it may fetch inputs that aren't normally used.
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- Add `warn-short-path-literals` setting [#13489](https://github.com/NixOS/nix/pull/13489)
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This setting, when enabled, causes Nix to emit warnings when encountering relative path literals that don't start with `.` or `/`, for instance suggesting that `foo/bar` should be rewritten to `./foo/bar`.
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- When updating a lock, respect the input's lock file [#13437](https://github.com/NixOS/nix/pull/13437)
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For example, if a flake has a lock for `a` and `a/b`, and we change the flakeref for `a`, previously Nix would fetch the latest version of `b` rather than using the lock for `b` from `a`.
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- Implement support for Git hashing with SHA-256 [#13543](https://github.com/NixOS/nix/pull/13543)
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The experimental support for [Git-hashing](@docroot@/development/experimental-features.md#xp-feature-git-hashing) store objects now also includes support for SHA-256, not just SHA-1, in line with upstream Git.
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## Contributors
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This release was made possible by the following 34 contributors:
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- John Soo [**(@jsoo1)**](https://github.com/jsoo1)
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- Alan Urmancheev [**(@alurm)**](https://github.com/alurm)
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- Manse [**(@PedroManse)**](https://github.com/PedroManse)
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- Pol Dellaiera [**(@drupol)**](https://github.com/drupol)
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- DavHau [**(@DavHau)**](https://github.com/DavHau)
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- Leandro Emmanuel Reina Kiperman [**(@kip93)**](https://github.com/kip93)
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- h0nIg [**(@h0nIg)**](https://github.com/h0nIg)
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- Philip Taron [**(@philiptaron)**](https://github.com/philiptaron)
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- Eelco Dolstra [**(@edolstra)**](https://github.com/edolstra)
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- Connor Baker [**(@ConnorBaker)**](https://github.com/ConnorBaker)
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- kenji [**(@a-kenji)**](https://github.com/a-kenji)
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- Oleksandr Knyshuk [**(@k1gen)**](https://github.com/k1gen)
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- Maciej Krüger [**(@mkg20001)**](https://github.com/mkg20001)
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- Justin Bailey [**(@jgbailey-well)**](https://github.com/jgbailey-well)
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- Emily [**(@emilazy)**](https://github.com/emilazy)
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- Volker Diels-Grabsch [**(@vog)**](https://github.com/vog)
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- gustavderdrache [**(@gustavderdrache)**](https://github.com/gustavderdrache)
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- Elliot Cameron [**(@de11n)**](https://github.com/de11n)
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- Alexander V. Nikolaev [**(@avnik)**](https://github.com/avnik)
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- tomberek [**(@tomberek)**](https://github.com/tomberek)
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- Matthew Kenigsberg [**(@mkenigs)**](https://github.com/mkenigs)
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- Sergei Zimmerman [**(@xokdvium)**](https://github.com/xokdvium)
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- Cosima Neidahl [**(@OPNA2608)**](https://github.com/OPNA2608)
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- John Ericson [**(@Ericson2314)**](https://github.com/Ericson2314)
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- m4dc4p [**(@m4dc4p)**](https://github.com/m4dc4p)
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- Graham Christensen [**(@grahamc)**](https://github.com/grahamc)
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- Jason Yundt [**(@Jayman2000)**](https://github.com/Jayman2000)
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- Jens Petersen [**(@juhp)**](https://github.com/juhp)
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- the-sun-will-rise-tomorrow [**(@the-sun-will-rise-tomorrow)**](https://github.com/the-sun-will-rise-tomorrow)
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- Farid Zakaria [**(@fzakaria)**](https://github.com/fzakaria)
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- AGawas [**(@aln730)**](https://github.com/aln730)
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- Robert Hensing [**(@roberth)**](https://github.com/roberth)
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- Dmitry Bogatov [**(@KAction)**](https://github.com/KAction)
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- Jörg Thalheim [**(@Mic92)**](https://github.com/Mic92)
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- Philipp Otterbein
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@ -185,5 +185,23 @@
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"gwenn.lebihan7@gmail.com": "gwennlbh",
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"hey@ewen.works": "gwennlbh",
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"matt@sturgeon.me.uk": "MattSturgeon",
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"pbsds@hotmail.com": "pbsds"
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"pbsds@hotmail.com": "pbsds",
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"sergei@zimmerman.foo": "xokdvium",
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"v@njh.eu": "vog",
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"pedro.manse@dmk3.com.br": "PedroManse",
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"arnavgawas707@gmail.com": "aln730",
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"mkg20001@gmail.com": "mkg20001",
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"avn@avnik.info": "avnik",
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"olk@disr.it": "k1gen",
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"108410815+alurm@users.noreply.github.com": "alurm",
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"kaction.cc@gmail.com": "KAction",
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"juhpetersen@gmail.com": "juhp",
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"opna2608@protonmail.com": "OPNA2608",
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"jgbailey@gmail.com": "m4dc4p",
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"justin.bailey@well.co": "jgbailey-well",
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"130508846+de11n@users.noreply.github.com": "de11n",
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"ConnorBaker01@Gmail.com": "ConnorBaker",
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"jsoo1@asu.edu": "jsoo1",
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"hsngrmpf+github@gmail.com": "DavHau",
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"matthew@floxdev.com": "mkenigs"
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}
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@ -162,5 +162,20 @@
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"pbsds": "Peder Bergebakken Sundt",
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"egorkonovalov": "Egor Konovalov",
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"jayeshv": "jayeshv",
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"vcunat": "Vladim\u00edr \u010cun\u00e1t"
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"vcunat": "Vladim\u00edr \u010cun\u00e1t",
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"mkenigs": "Matthew Kenigsberg",
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"alurm": "Alan Urmancheev",
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"jgbailey-well": "Justin Bailey",
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"k1gen": "Oleksandr Knyshuk",
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"juhp": "Jens Petersen",
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"de11n": "Elliot Cameron",
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"jsoo1": "John Soo",
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"m4dc4p": null,
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"PedroManse": "Manse",
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"OPNA2608": "Cosima Neidahl",
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"mkg20001": "Maciej Kr\u00fcger",
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"avnik": "Alexander V. Nikolaev",
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"DavHau": null,
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"aln730": "AGawas",
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"vog": "Volker Diels-Grabsch"
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}
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@ -29,6 +29,7 @@ release:
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```console
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$ export VERSION=X.YY
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$ git checkout -b release-notes
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$ export GITHUB_TOKEN=...
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$ ./maintainers/release-notes
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```
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