bash-completion: complete tar with xbps files

[tornaria]

Backported from upstream scop/bash-completion#688

Testing the changes

• I tested the changes in this PR: YES

[tornaria]

Just FTR, the failed tests are exactly the same with or without the patch that this PR introduces:

=========================== short test summary info ============================
FAILED test_aclocal.py::TestAclocal::test_1 - assert <CompletionResult []>
FAILED test_chsh.py::TestChsh::test_2 - assert <CompletionResult []>
FAILED test_ether_wake.py::TestEtherWake::test_1 - assert <CompletionResult []>
FAILED test_gdb.py::TestGdb::test_2 - AssertionError: assert <CompletionRe......
FAILED test_ifdown.py::TestIfdown::test_1 - assert <CompletionResult []>
FAILED test_ifstat.py::TestIfstat::test_2 - assert <CompletionResult []>
FAILED test_ifup.py::TestIfup::test_1 - assert <CompletionResult []>
FAILED test_iperf.py::TestIperf::test_2 - assert <CompletionResult []>
FAILED test_killall.py::TestKillall::test_1 - assert <CompletionResult []>
FAILED test_nethogs.py::TestNethogs::test_1 - assert <CompletionResult []>
FAILED test_perldoc.py::TestPerldoc::test_1 - AssertionError: assert 'Path' i...
FAILED test_perldoc.py::TestPerldoc::test_3 - AssertionError: assert <Complet...
FAILED test_pgrep.py::TestPgrep::test_1 - assert <CompletionResult []>
FAILED test_pidof.py::TestPidof::test_1 - assert <CompletionResult []>
FAILED test_pkill.py::TestPkill::test_1 - assert <CompletionResult []>
FAILED test_pwdx.py::TestPwdx::test_1 - assert <CompletionResult []>
FAILED test_renice.py::TestRenice::test_1 - assert <CompletionResult []>
FAILED test_renice.py::TestRenice::test_2 - assert <CompletionResult []>
FAILED test_reptyr.py::TestReptyr::test_1 - assert <CompletionResult []>
FAILED test_service.py::TestService::test_1 - assert <CompletionResult []>
FAILED test_tar.py::TestTar::test_4 - AssertionError: assert <CompletionResul...
FAILED test_tar.py::TestTar::test_22 - AssertionError: assert <CompletionResu...
FAILED unit/test_unit_ip_addresses.py::TestUnitIpAddresses::test_1 - Assertio...
FAILED unit/test_unit_ip_addresses.py::TestUnitIpAddresses::test_2 - assert <...
FAILED unit/test_unit_ip_addresses.py::TestUnitIpAddresses::test_3 - assert <...
FAILED unit/test_unit_ip_addresses.py::TestUnitIpAddresses::test_4 - assert <...
= 26 failed, 1106 passed, 457 skipped, 14 xfailed, 4 xpassed in 1126.01s (0:18:46) =

I'd rather wait for the next upstream release to worry about tests passing.

[paper42]

Just FTR, the failed tests are exactly the same with or without the patch that this PR introduces:

I'd rather wait for the next upstream release to worry about tests passing.

Let's disable them with a FIXME comment

[tornaria]

Let's disable them with a FIXME comment

With the idea of #34766 I would annotate this as check_xfail="*" so the checks run but the error is ignored.

[tornaria]

@paper42 should be ok now, both local and CI pass.