treewide: Qt5.X -> Qt5.15 (when possible)

[freezeboy]

Motivation for this change

I tried to migrate the software still using Qt5.12 to a newer version, sometimes I had to update the software to make it work.

Among the reasons blocking the packages, I already spotted:

• Dependency to qtwebkit which is broken with Qt5.15
• Use of QPainterPath class, apparently the header definition has moved between 5.14 and 5.15
• Some package build configurations forbid deprecated members use ... and there are such in Qt5.15
• Other oddities in the code that is not more valid (changing, return types)
• A few of them compile .. then segfault (digitalbitbox)

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

[doronbehar]

This is a tremendous work! Did you test each and every package to build and run right?

Overall I approve, but the commit messages sometimes miss some details of other changes, it might help to get this approved but I wouldn't make this a blocker.

[freezeboy]

Yes I built and run all the executables, just to check it starts.

For the commit messages, I can see to improve them, at least the ones where an update was needed.

[doronbehar]

Well done 👏.

[freezeboy]

Most of the effort is done by my cpu and its fan 😏

[freezeboy]

I force pushed with more details in the commit messages, please tell me if you need more

[doronbehar]

Pushed after a rebase to fix merge conflicts. Ideally I think every usage of a pinned libsForQt5.. should be accompanied with a comment. I counted 129 usages of libsForQt514.callPackage that come with no comment explaining them.

[freezeboy]

Thank you, I will continue to add other apps, and I think we can think to merge this PR, I will start another PR for to continue this process otherwise we will have more and more conflicts

[freezeboy]

Rebase done

[jonringer]

LGTM

failures exist on master

https://github.com/NixOS/nixpkgs/pull/102840
2 packages marked as broken and skipped:
retroshare retroshare06

3 packages failed to build:
kmymoney obs-ndi xflr5

70 packages built:
amarok appcsxcad birdtray calaos_installer chiaki clipgrab communi csound-qt cutecom digitalbitbox eagle flameshot fritzing golden-cheetah herqq kdiff3 kgraphviewer krename kronometer ktorrent libsForQt5.herqq libsForQt5.kde2-decoration qcsxcad qtcurve libsForQt512.herqq libsForQt512.kde2-decoration libsForQt512.qcsxcad libsForQt512.qtcurve libsForQt514.kde2-decoration libsForQt514.qcsxcad libsForQt514.qtcurve luminanceHDR massif-visualizer minitube obs-move-transition obs-studio obs-v4l2sink obs-wlrobs openems ostinato pentobi peruse plex-media-player protonmail-bridge psi psi-plus python27Packages.python-csxcad python37Packages.python-csxcad python37Packages.python-openems python38Packages.python-csxcad python38Packages.python-openems qlcplus rsibreak rssguard saga samplv1 sdrangel sigil skanlite skrooge solarus solarus-quest-editor sonic-lineup strawberry teamspeak_client tellico virtmanager-qt vnote webcamoid zoom-us

[freezeboy]

I guess obs-ndi is normal as the rest of the stack now use qt5.15, I can change its Qt version too, but I won't be able to build it anyway

I start looking the other errors

[jonringer]

I guess obs-ndi is normal as the rest of the stack now use qt5.15, I can change its Qt version too, but I won't be able to build it anyway

I start looking the other errors

either way, this is still an improvement. Thanks! :)

[doronbehar]

3 packages failed to build:
kmymoney obs-ndi xflr5

That's a regression from the last time I tried to build kmymoney - it fails due to xmlsec not building:

https://gist.github.com/doronbehar/4b34941feb73855eb307b3470d12dff2

[doronbehar]

@freezeboy when you rebased it you forced pushed and forgot some commits of mine :(. For instance qtwebkit was fixed there.

[doronbehar]

Follow up PR: #104474

kmymoney needs #104472 in order to work.