dhcp-client-service-type has been deprecated for a while as the
ISC implementation has reached end-of-life upstream in 2022.  This
is the last remaining user of dhcp-client-service-type in the Guix
repository.

* tests/guix-system.sh: Use dhcpcd-service-type.

Change-Id: Iaf8dd4bc888c99815d2d6c8c195fe92644186625

* tests/guix-system.sh: Add test.

Change-Id: I26c90741f17257dc50757b7cb5210ea4e645ecce

This is a followup to e5078ff3210f4a9863b641a60430b2cb3c9c15ee, which
broke this test:

  $ guix system disk-image -n gnu/system/examples/desktop.tmpl
  guix system: warning: 'disk-image' is deprecated: use 'image' instead
  guix system: error: EFI bootloader required with GPT partitioning

* tests/guix-system.sh: Use ‘guix system image’ instead of ‘guix system
disk-image’.  Pass ‘-t efi-raw’ for ‘desktop.tmpl’.

Change-Id: I6877085ab33d9e8b471315b806fed22a7d1241a3

Some architectures (like riscv64) do no support some of the KDE
packages, so just test this example on x86_64-linux.

* tests/guix-system.sh: Verify plasma.tmpl to test build it at x86_64-linux.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

Addresses <https://issues.guix.gnu.org/62406>.

With 'set -e', a return status inverted with '!' does not cause the shell to
exit immediately.  Instead use '&& false' to indicate an expected failure.

* tests/guix-archive.sh, tests/guix-build-branch.sh, tests/guix-build.sh,
tests/guix-daemon.sh, tests/guix-download.sh,
tests/guix-environment-container.sh, tests/guix-environment.sh,
tests/guix-gc.sh, tests/guix-git-authenticate.sh, tests/guix-graph.sh,
tests/guix-hash.sh, tests/guix-home.sh, tests/guix-pack-relocatable.sh,
tests/guix-pack.sh, tests/guix-package-aliases.sh, tests/guix-package-net.sh,
tests/guix-package.sh, tests/guix-refresh.sh, tests/guix-shell.sh,
tests/guix-style.sh, tests/guix-system.sh: Replace uses of '! ...' with
'... && false' or `test ! ...` as appropriate.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

Desktop these days means having Rust support (GNOME), which i686 currently
lacks on Guix.

* tests/guix-system.sh: Do not attempt to build the desktop.tmpl image for
i686-linux.

The regression was introduce with commit
c7793b82efd3383a9f7adf0dfa82d71ee032e41b ("gnu: raspberry-pi: Add a
bootloader-chain for the Raspberry Pi and os examples.") due to the examples
needing to be built for the aarch64-linux system.

* tests/guix-system.sh: Invoke guix system build with '--system=aarch64-linux'
to build the Raspberry Pi systems.

Partly fixes <https://issues.guix.gnu.org/58352>.

* tests/guix-system.sh: Try to build 'desktop.tmpl' for x86_64, i686, and aarch64.

This is a followup to 95a03aa5c507d48e2cde19ea007b8f90a4e0108a.  Since
that commit, merely evaluating 'vm-image.tmpl' would trigger the build
of 'current-guix' so skip it.

* tests/guix-system.sh: Do not try to build 'vm-image.tmpl'.

Previously user-facing commands would happily start building packages
even if they do not support that system.  With this change, all the
user-facing commands reject unsupported packages without going further.

* guix/profiles.scm (profile-derivation): Add #:allow-unsupported-packages?.
Define 'check-supported-packages' and honor #:allow-unsupported-packages?.
* tests/guix-pack.sh, tests/guix-package.sh, tests/guix-shell.sh: Ensure
that unsupported packages are rejected.
* tests/guix-system.sh: Pass "--system=armhf-linux" when attempting to
build gnu/system/examples/asus-c201.tmpl.