* xmlsec: fix build on macOS
xmlsec detects the Darwin platform and uses the -D flag with base64, but nix uses GNU base64 which requires -d.
This patch removes the platform test and always uses the -d flag.
python3Packages.pyside,python3Packages.pysideTools,python3Packages.pysideShiboken,pysideApiExtractor,pysideGeneratorrunner: remove dependencies to python2
So, kakoune takes the documentation shown for `:doc` from
`$KAKOUNE_RUNTIME/share/kak/doc`. Unfortunately, it seems
that it will ignore files that are symlinks. This is arguably
a bug in kakoune, we workaround it for now by copying the
content of the docfiles.
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.
