The upstream session files display managers use have no concept of sessions being composed from
desktop manager and window manager. To be able to set upstream session files as default
session, we need a single option. Having two different ways to set default session would be confusing,
though, so we decided to deprecate the old method.
We also created separate script for each session, just like we already had a separate desktop
file for each one, and started using displayManager.sessionPackages mechanism to make the
session handling more uniform.
There's two ways of providing graphical sessions now:
- `displayManager.session` via. `desktopManager.session` and
`windowManager.session`
- `displayManager.sessionPackages`
`sessionPackages` doesn't make a distinction between desktop and window
managers. This makes selecting a session provided by a package using
`desktopManager.default` nonsensical.
We therefor introduce `displayManager.defaultSession` which can select a session
from either `displayManager.session` or `displayManager.sessionPackages`.
It will default to `desktopManager.default + windowManager.default` as before.
If the dm default is "none" it will select the first provided session from
`sessionPackages`.
When session debugging was enabled in GNOME but not in Pantheon
{
services.xserver = {
desktopManager.pantheon = {
enable = true;
};
desktopManager.gnome3 = {
enable = true;
debug = true;
};
};
}
it caused a conflict:
error: The option `environment.sessionVariables.GNOME_SESSION_DEBUG' has conflicting definitions, in `<nixpkgs/nixos/modules/services/x11/desktop-managers/pantheon.nix>' and `<nixpkgs/nixos/modules/services/x11/desktop-managers/gnome3.nix>'.
For some reason nm-applet has to be running for an authentication
dialog to be spawned by wingpanel-indicator-network.
This also fixes storing NetworkManager secrets in the keyring, but this
is still broken because we lack the proper PAM configuration.
We don't need gnome-bluetooth because its executables
path is already hardcoded into the contractor file, as that's
the only place it is needed.
Don't think we need gnome-power-manager either.
Also add programs like geary to removePackagesByName.
