Upgrades Hydra to the latest master/flake branch. To perform this
upgrade, it's needed to do a non-trivial db-migration which provides a
massive performance-improvement[1].
The basic ideas behind multi-step upgrades of services between NixOS versions
have been gathered already[2]. For further context it's recommended to
read this first.
Basically, the following steps are needed:
* Upgrade to a non-breaking version of Hydra with the db-changes
(columns are still nullable here). If `system.stateVersion` is set to
something older than 20.03, the package will be selected
automatically, otherwise `pkgs.hydra-migration` needs to be used.
* Run `hydra-backfill-ids` on the server.
* Deploy either `pkgs.hydra-unstable` (for Hydra master) or
`pkgs.hydra-flakes` (for flakes-support) to activate the optimization.
The steps are also documented in the release-notes and in the module
using `warnings`.
`pkgs.hydra` has been removed as latest Hydra doesn't compile with
`pkgs.nixStable` and to ensure a graceful migration using the newly
introduced packages.
To verify the approach, a simple vm-test has been added which verifies
the migration steps.
[1] https://github.com/NixOS/hydra/pull/711
[2] https://github.com/NixOS/nixpkgs/pull/82353#issuecomment-598269471
If invoked with php 7.4 on a up2date Drupal 7 installation, drush
complains with a deprecation warning, that swallows all legit output:
> drush uli
Deprecated function: Array and string offset access syntax with curly braces is [error]
deprecated in include_once() (line 20 of
/var/www/…/htdocs/includes/file.phar.inc).
Use php7.3 when invoking drush.
Old intercaps names are aliased.
darcs-to-git: rename from darcsToGit
git-fast-export: rename from gitFastExport
git-remote-gcrypt: rename from gitRemoteGcrypt
hub-unstable: rename from hubUnstable
top-git: rename from topGit
The current gdb patch to support NIX_DEBUG_INFO_DIRS fails if
the user attempts to change the debug file directory to a
value other than the default. For instance:
(gdb) set debug-file-directory /run/booted-system/sw/lib/debug
results in:
munmap_chunk(): invalid pointer
Aborted (core dumped)
To fix this issue, the debug_file_directory is allocated
with xstrdup so that a subsequent call to xfree will succeed.
