Flatpak’s installed tests build Flatpak runtimes, among other things.
Upstream code does this by copying some programs on `PATH`
as well as some possible dependencies from host’s /usr.
We patch the code to use `nix-store --query --requisites`
to make the dependency discovery easier.
The Flatpak’s installed tests add `socat` to `PATH` and later run
`nix-store --query --requisites` on its location but it was failing with
error: path '/nix/store/qcyf7nq5vvfw32967sv4j6z190inrbrc-socat-1.7.3.4' is not valid
The issue occurred because, while the host Nix store is bind mounted into the test VM,
the VM’s store uses its own database that only contains the packages in the VM’s closure.
Since the test commands are not actually part of the VM but only passed through PTY,
the `flatpak.installedTests` derivation was not part of the VM’s closure, so `nix-store`
in the VM could not get information about its dependency `socat`.
Let’s make the `installedTests` of the tested package part of the test VM’s closure
by passing it as a global environment variable. This will also have the added benefit
that user no longer has to type the path when running the installed tests manually in the VM;
they can just use `gnome-desktop-testing-runner -d $TESTED_PACKAGE_INSTALLED_TESTS`,
which is much more conducive to tab completion.
This modifies the `router` to not give out a range of IP addresses but
only give out a fixed address based on the MAC address using the
`services.dhcpd4.machines` option.
To get access to the MAC address the `qemuNicMac` function is defined
and exported from `qemu-flags.nix`.
Also, add some sleep statements in between, which seems to at least feel
like it causes
> WARNING: Device /dev/vda* not initialized in udev database even after waiting 10000000 microseconds.
To occur less frequently.
This eventually still succeeds after some amount of waiting, I suspect
some racyness in the way lvm's udev-triggered scripts trigger other
units.
This is required by (among others) Podman to run containers in rootless mode.
Other distributions such as Fedora and Ubuntu already set up these mappings.
The scheme with a start UID/GID offset starting at 100000 and increasing in 65536 increments is copied from Fedora.
The image tag can be specified or generated from the output hash.
Previously, a generated tag could be recovered from the evaluated
image with some string operations.
However, with the introduction of streamLayeredImage, it's not
feasible to compute the generated tag yourself.
With this change, the imageTag attribute is set unconditionally,
for the buildImage, buildLayeredImage, streamLayeredImage functions.
This permits using method_set_hostname but still denies
method_set_static_hostname. As a result DHCP clients can now always set
the transient hostname via the SetHostname method of the D-Bus interface
of systemd-hostnamed (org.freedesktop.hostname1.set-hostname).
If the NixOS option networking.hostName is set to an empty string (or
"localhost") the static hostname (kernel.hostname but NOT /etc/hostname)
will additionally be updated (this is intended).
From "man hostnamectl": The transient hostname is a fallback value
received from network configuration. If a static hostname is set, and is
valid (something other than localhost), then the transient hostname is
not used.
Fix#74847.
Note: It's possible to restrict access to the org.freedesktop.hostname1
interface using Polkit rules.
