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nixos/display-managers: install sessionData.desktops #100112

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@worldofpeace
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@worldofpeace worldofpeace commented Oct 9, 2020

Motivation for this change

Fixes #100108
Screenshot from 2020-10-09 17-44-58

Things done
  • Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
  • Built on platform(s)
    • NixOS
    • macOS
    • other Linux distributions
  • Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
  • Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
  • Tested execution of all binary files (usually in ./result/bin/)
  • Determined the impact on package closure size (by running nix path-info -S before and after)
  • Ensured that relevant documentation is up to date
  • Fits CONTRIBUTING.md.
@worldofpeace worldofpeace added this to In progress in 20.09 Blockers via automation Oct 9, 2020
@worldofpeace worldofpeace added this to the 20.09 milestone Oct 9, 2020
@jtojnar
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@jtojnar jtojnar commented Oct 9, 2020

Just to make sure, does the button persist after running imports.misc.systemActions.getDefault()._updateLogout() in looking glass?

@worldofpeace
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@worldofpeace worldofpeace commented Oct 9, 2020

Just to make sure, does the button persist after running imports.misc.systemActions.getDefault()._updateLogout() in looking glass?

Will try in the vm.

@worldofpeace worldofpeace force-pushed the fix-gnome-logout-multisession branch from 90f24db to 3cd2b59 Oct 9, 2020
@worldofpeace worldofpeace changed the title nixos/gnome3: fix showing logout button nixos/display-managers: install sessionData.desktops Oct 9, 2020
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@worldofpeace worldofpeace commented Oct 9, 2020

So I tried dropping setting XDG_DATA_DIRS in the gdm.nix, but it doesn't find any sessions. I'm not sure why that is, though. Maybe it's because it's a system service so it has the very minimal environment?

@ofborg ofborg bot removed the 6.topic: GNOME label Oct 9, 2020
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@worldofpeace worldofpeace commented Oct 9, 2020

Just to make sure, does the button persist after running imports.misc.systemActions.getDefault()._updateLogout() in looking glass?

This works 👍

jtojnar
jtojnar approved these changes Oct 9, 2020
20.09 Blockers automation moved this from In progress to Reviewer approved Oct 9, 2020
@worldofpeace worldofpeace merged commit 7a2eccf into NixOS:master Oct 9, 2020
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20.09 Blockers automation moved this from Reviewer approved to Done Oct 9, 2020
@worldofpeace worldofpeace deleted the fix-gnome-logout-multisession branch Oct 9, 2020
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@worldofpeace worldofpeace commented Oct 9, 2020

backported to 20.09 in 3cd2b59.
and 20.03 in d74573d

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@worldofpeace worldofpeace commented Oct 9, 2020

I did 20.03 just because it looks like a safe bugfix. I have no idea if this was in issue in 20.03, though.

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@jtojnar jtojnar commented Oct 15, 2020

It created infinite recursion when using LXQt, since lxqt module uses config.system.path in services.xserver.desktopManager.session. config.system.path is a buildEnv that depends on environment.systemPackages.

We either cannot install the sessions environment.systemPackages or must forbid sessions from depending on config.system.path. The latter does not really sound reasonable so I guess the only solution would be to add the sessions to XDG_DATA_DIRS explicitly.

Reverted in 2a4607f (master), 9ca3b74 (release-20.09) and 8fa9a8a (release-20.03).

worldofpeace added a commit to worldofpeace/nixpkgs that referenced this issue Oct 21, 2020
worldofpeace added a commit that referenced this issue Oct 23, 2020
Fixes #100108

Alternative to #100112 which doesn't break stuff.

(cherry picked from commit 755ba17)
nlewo added a commit to nlewo/nixpkgs that referenced this issue Oct 31, 2020
Fixes NixOS#100108

Alternative to NixOS#100112 which doesn't break stuff.

(cherry picked from commit 755ba17)
marcus7070 added a commit to marcus7070/nixpkgs that referenced this issue Nov 22, 2020
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