[Rpm-maint] [rpm-software-management/rpm] RPM 4.20.0 ALPHA released! (Discussion #3023)

[Michal Domonkos]

Spring is here again and with it, a preview of what's coming in the next major RPM update later this year, version 4.20, in the form of an ALPHA pre-release.

As per usual, a number of new features are in the works, most of which have already landed in this pre-release and are ready for a test drive.  We've also (finally!) made the plugin API public, and removed the insecure legacy OpenPGP parser (replaced by Sequoia in 4.19).

It took quite a bit of pondering and back-and-forth to hash out a feasible plan where RPM can still be bootstrapped without either the internal OpenPGP parser or Rust entering the picture, but here we go.  If you're a distro builder or just interested in the details, see the updated [INSTALL](https://github.com/rpm-software-management/rpm/blob/rpm-4.20.x/INSTALL) file or #2984 for more background information.

You may also want to check out the Compatibility notes section at the bottom of the release page linked below, in case your package(s) are affected.

Lastly, here's a quick summary of the changes:

* [Declarative buildsystem](https://rpm-software-management.github.io/rpm/manual/buildsystem.html) support ([#2774](https://github.com/rpm-software-management/rpm/pull/2774))
* A new RPM-controlled per-build directory ([#2885](https://github.com/rpm-software-management/rpm/pull/2885))
* Support for [SPEC-local](https://rpm-software-management.github.io/rpm/manual/dependency_generators.html#using-file-attributes-in-their-own-package) file attributes and generators ([#2911](https://github.com/rpm-software-management/rpm/pull/2911))
* New prepend and append [modes](https://rpm-software-management.github.io/rpm/manual/spec.html#build-scriptlets) for build scriptlets ([#2728](https://github.com/rpm-software-management/rpm/pull/2728))
* Python bindings have been ported to the stable ABI ([#2674](https://github.com/rpm-software-management/rpm/pull/2674))
* Plugin API is now public ([#2661](https://github.com/rpm-software-management/rpm/pull/2661))
* Increased isolation of install scriptlets on Linux via a new plugin ([#2666](https://github.com/rpm-software-management/rpm/pull/2666))
* File trigger scripts now also receive package count arguments ([#2871](https://github.com/rpm-software-management/rpm/pull/2871), [#2883](https://github.com/rpm-software-management/rpm/pull/2883))
* Perl dependency generators have been split out ([#2947](https://github.com/rpm-software-management/rpm/pull/2947))
* Internal OpenPGP parser has been removed ([#2986](https://github.com/rpm-software-management/rpm/pull/2986), [#2984](https://github.com/rpm-software-management/rpm/pull/2984))

For download information and a full (draft) changelog, visit: https://rpm.org/wiki/Releases/4.20.0

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