A lot of tests assume that the alice user
will have a uid of 1000. Let's make that
a guarantee and be able to reference this value.

We've rewritten it use GDM, and we can now autologin
to the X11 session because of the accountsservice preStart
script for autologin. It should work similar to how the wayland
test works, just with a few nuanced differences for xorg.

If I understand correctly, the problem isn't so much that you're assigning to
that top-level attribute, but that the assignment to the attribute (or any
child of the attribute) introduces the 'config' object and prevents 'lifting'
all settings to a generated 'config' object.

- update to version 3.22.11
- build system ported to meson

…stead of binaries

This helps us instruct rustc to build tests instead of binaries. The
actual build will then ONLY produce test executables. This is a first
step towards having rust crate tests within nixpkgs.

We default back to only a single output in test cases since that is the
only reasonable thing to do here.

Producing libraries or binaries in addition to tests would theoretically
be feasible but usually generates different dependency trees. It is very
common to have some libraries in `[dev-depdendencies]` within Cargo.toml
just for your tests. To not start mixing things up going with a
dedicated derivation for the test build sounds like the best choice for
now.

To use this you must provide a proper test dependency chain to
`buildRustCrate` (as you would usually do with your non-test inputs).
And then set the `buildTests` attribute to `true`. The derivation will
then contain all tests that were built in `$out/tests`. All common test
patterns and directories should be supported and tested by this change.

Below is an example how you would run a single test from the derivation.
This commit contains some more examples in the `buildRustCrateTests`
attribute set that might be helpful.

```
let
  drv = buildRustCrate {
     …
     buildTests true;
  };
in runCommand "test-my-crate" {} ''
  touch $out
  exec ${drv}/tests/my-test
''
```

There is no point in reinventinb builtins through `filterAttrs` or the
like. Lets just stick to what we already have in our toolbelt.

Add cachix as a blocker for channel updates

greybird: 3.22.10 -> 3.22.11

mate.engrampa: 1.22.2 -> 1.22.3

python: Add support for installing Python eggs

python37Packages.pikepdf: 1.8.1 -> 1.8.2

nixosTests.gnome3-xorg: port to python/rewrite

buildRustCrate: add `buildTests` flag to tell rustc to build tests instead of binaries

Channel blocker https://hydra.nixos.org/build/109901320

- Removed the unnecessary libmicrohttpd dependency, which doesn't
  build on macOS. KeepassXC removed this dependency in 2.1.2
- Fixed a compiler error related to the Touch ID feature by adding a
  dependency on the LocalAuthentication framework

Traceback (most recent call last):
  File "/nix/store/8qkdlyv2ckrimvi50qvl0anzv66jcp2j-python-swiftclient-3.6.0/bin/.swift-wrapped", line 7, in <module>
    from swiftclient.shell import main
  File "/nix/store/8qkdlyv2ckrimvi50qvl0anzv66jcp2j-python-swiftclient-3.6.0/lib/python3.7/site-packages/swiftclient/__init__.py", line 20, in <module>
    from .client import *  # noqa
  File "/nix/store/8qkdlyv2ckrimvi50qvl0anzv66jcp2j-python-swiftclient-3.6.0/lib/python3.7/site-packages/swiftclient/client.py", line 33, in <module>
    from swiftclient import version as swiftclient_version
  File "/nix/store/8qkdlyv2ckrimvi50qvl0anzv66jcp2j-python-swiftclient-3.6.0/lib/python3.7/site-packages/swiftclient/version.py", line 15, in <module>
    import pkg_resources
ModuleNotFoundError: No module named 'pkg_resources'

tpm2-tss: fix build

Clarify error message of 'assigning to top-level attribute'