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nixos/release-notes: Document dry activation scripts

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Janne Heß 2021-09-09 22:32:55 +02:00
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11
nixos/doc/manual/from_md/release-notes/rl-2111.section.xml
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@ -37,6 +37,17 @@
PostgreSQL now defaults to major version 13.
</para>
</listitem>
<listitem>
<para>
Activation scripts can now opt int to be run when running
<literal>nixos-rebuild dry-activate</literal> and detect the
dry activation by reading <literal>$NIXOS_ACTION</literal>.
This allows activation scripts to output what they would
change if the activation was really run. The users/modules
activation script supports this and outputs some of is
actions.
</para>
</listitem>
</itemizedlist>
</section>
<section xml:id="sec-release-21.11-new-services">

4
nixos/doc/manual/release-notes/rl-2111.section.md
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@ -14,6 +14,10 @@ In addition to numerous new and upgraded packages, this release has the followin
- PostgreSQL now defaults to major version 13.
- Activation scripts can now opt int to be run when running `nixos-rebuild dry-activate` and detect the dry activation by reading `$NIXOS_ACTION`.
This allows activation scripts to output what they would change if the activation was really run.
The users/modules activation script supports this and outputs some of is actions.
## New Services {#sec-release-21.11-new-services}
- [btrbk](https://digint.ch/btrbk/index.html), a backup tool for btrfs subvolumes, taking advantage of btrfs specific capabilities to create atomic snapshots and transfer them incrementally to your backup locations. Available as [services.btrbk](options.html#opt-services.brtbk.instances).