Since 008f9f0cd4
("nixos/test-driver: actually use the backdoor message to wait for backdoor"),
when boot is still computering, we can get a tons of empty strings in response to the shell.
This is not really useful to print and waste the disk space for any CI system that logs them.
We stop logging chunks whenever they are empty.
While working on #192270, I noticed that only some wait_for_* helper
functions make the timeout configurable. I think we should be able to
customize it in all cases
New EDK2 sets up the backdoor port as a serial console, which feeds the test driver
a bunch of boot logs it can safely ignore. Do so by waiting for the message the
backdoor shell prints before doing anything else.
By some miracle, before, it was possible to reconnect to the `node1` without
doing any relevant dance.
But now we are direct booting (¿), it seems like we need to do the right things.
This introduces a `check_output` flag for `execute` because we do not want to steal the
messages from the backdoor service as we might execute the kexec too fast compared
to when we will reconnect.
Therefore, we will let the message in the pipe if needed.
- `wait_until_fails` was not passing through its `timeout` argument to
the internal `retry` function, hence was always using 900 seconds (the
default timeout for `retry`) rather than the user-specified value.
Previously, `wait_for_console_text` would block indefinitely until there were lines
shown in the buffer.
This is highly annoying when testing for things that can just hang for some reasons.
This introduces a classical timeout mechanism via non-blocking get on the Queue.
This is useful whenever you want to diagnose the current state of UEFI
variables, to assert that bootloaders or boot programs (systemd-stub)
did their job correctly and set their variables accordingly.
In the future, it can enable inspecting SecureBoot keys also.
This warning was added a year and a half ago, but still no test in
NixOS directly instantiates the machine class, presumably because it's
not actually possible for a test to do so without losing
functionality. For example, there's no way for a NixOS test to access
the output directory that create_machine passes to the Machine
constructor.
This warning is therefore just contributing to alert fatigue for
users, who are unable to follow its advice. Once it's actually
possible to do what it suggests, the warning can be reintroduced.
What the code was trying to do was helpfully add a directory and
extension if none were specified, but it did this by checking whether
the filename was composed of a very limited character set that didn't
even include dashes.
With this change, the intention of the code is clearer, and I can put
dashes in my screenshot names.
The output of a command is not guaranteed to be valid UTF-8, so the
decoding can fail raising UnicodeDecodeError. If this happens during a
`succeeds` the check will be erroneously marked failed.
This changes the error handling to the "replace" mode, where invalid
codepoints are replaced with � (REPLACEMENT CHARACTER U+FFFD) and the
decoding can go on.
`shell_interact()` is currently not nice to use. If you try to cancel
the socat process, it will also break the nixos test. Furthermore
ptpython creates it's own terminal that subprocesses are running in,
which breaks some of the terminal features of socat.
Hence this commit extends `shell_interact` to allow also to connect to
arbitrary servers i.e. tcp servers started by socat.
A few places used Unicode U+2018/U+2019 left/right single quotes (but
not always correctly balanced). Let's just use plain ASCII single quotes
everywhere.
