The previous implementation of plugin-support for the kakoune derivation
was based on generating, at build time, a `plugins.kak` file that would
source all .kak files in the list of plugins, and wrap the `kak` binary
in a script that would add some command-line arguments so that this
file gets loaded on start-up. The main problem with this approach
is that the plugins' code get executed *after* the user's configuration
file is loaded, so effectively one cannot automatically activate/configure
these plugins.
The idiomatic way of loading plugins is ensuring they end up installed
somwhere under `share/kak/autoload`. Because plugins are already being
packaged to have their code in `share/kak/autoload/plugins/<name-of-plugin>`,
we can obtain a derivation that includes the plugins simply by doing a
`symlinkJoin` of `kakoune-unwrapped` and all the requested plugins.
For this to work, we need to fix two issues:
1. By default, kakoune makes `share/kak/autoload` a symbolic link to
`share/kak/rc`, which contains all builtin definitions. We need
to patch this to put the symlink under `share/kak/autoload/rc`, so that
the join works.
2. By default kakoune expects the `autoload` directory to be in
`../share/kak/autoload` relative to the location of the `kak` binary.
We need to set the `KAKOUNE_RUNTIME` to point the symlinked
share/kak for this to work.
In #89806 it has been reported that the final package is missing a lot
of features like support for the self-service GUI and the
config-management.
While working on supporting those components in the Nix-package, I
decided to refactor the package to simplify the entire setup.
This patch changes the following things:
* Binaries and libraries are patched using the `autoPatchelfHook` to
avoid having unneeded libraries linked (e.g. some programs use gtk2,
others use gtk3).
* Moved source-declarations into their own file.
* Wrapped `configmgr` and `selfservice` and added those to `$out/bin`.
* Don't mention the old `citrix_receiver`-packages in the manual anymore
since those packages were removed in 19.09 and are EOLed anyways.
Closes#89806
