ci: attempt to make the qt6 docker run work

On CI were were getting "Could not import sip" because link_pyqt was
looking for PyQt5.sip.
I made that look at QUTE_QT_WRAPPER since that's being set already on
tox.ini
There are probably a few other changes around link_pyqt and the makefile
etc we need to change when we switch the default wrapper.

I overrode the default `py` tox environment with py-qt6 to override
those wrapper related variables. I probably could have done something
sneaky with curly braces to make it so we don't have to add a few more
lines to the file. But in my opinion in config file is far to obfuscated
and hard to maintain already.

I changed the docker file to call the new py-qt6 env if it's a qt6
container. I'm not 100% sure that is required though since there is also
a tox invocation in the GH action definition, maybe that overrides the
container entrypoint? Also changed the indentation in the dockerfile
template a bit to make it easier to see where the conditionals start and
end.

Speaking of which I changed the matrix definition and tox invocation to
match a later one to hopefully make it so we can invoke different tox
environments in the containers without having to rebuild the containers.
Not sure I did that right, I'll see soon.

I added the unstable-qt6 container generation line so we can use it in
the future, and to match the not-qt6 one. I'm not switching to that in
CI though because the pyqt used by that is broken at the moment
(ref https://www.riverbankcomputing.com/pipermail/pyqt/2023-March/045214.html)

Also fixed the vim modeline in generate.py so my syntax highlighting
works.

1 files changed, 5 insertions, 0 deletions

diff --git a/tox.ini b/tox.ini
index 842e527b7..2fba834cc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -53,6 +53,11 @@ commands =
     {envpython} -bb -m pytest {posargs:tests}
     cov: {envpython} scripts/dev/check_coverage.py {posargs}
 
+[testenv:py-qt6]
+setenv =
+    PYTEST_QT_API=pyqt6
+    QUTE_QT_WRAPPER=PyQt6
+
 [testenv:bleeding]
 basepython = {env:PYTHON:python3}
 setenv =