This commit ports the work of EchterAgo and cculianu from Electron-Cash,
to implement a new toolchain to scan qr codes.
Previously, on Linux and Win, we have been using zbar to access the camera
and read qrcodes; and on macOS we used CalinsQRReader (an objective-C
project by cculianu).
The new toolchain added here can use QtMultimedia to access the camera,
and then feed that image into zbar. When used this way, zbar needs
fewer dependencies and is easier to compile, in particular it can be
compiled for macOS.
The new toolchain works on all three platforms, with some caveats
(see code comments in related commits) -- so we also keep the end-to-end
zbar toolchain; but at least we can drop CalinsQRReader.
The related changes in Electron-Cash are spread over 50+ commits (several PRs and direct
pushes to master), but see in particular:
https://github.com/Electron-Cash/Electron-Cash/pull/1376
some other interesting links:
b2b737001c163224cf1f3b31e0fcb1eda015908ehttps://github.com/Electron-Cash/Electron-Cash/pull/1545052aa06c23
was exiting with non-zero error code due to trying to copy directory
```
9cf9cdda331b565dd95b105d3fe987beefa113ac2c594d83783998017ad52d70 dist/electrum-4.1.4-16-g648fac709-portable.exe
020ceacb3a6fc5986d3ec271985c22c8646d2bb534536b8e2ab774924b21d58f dist/electrum-4.1.4-16-g648fac709-setup.exe
e65dbbe24fe01e8635d4def088667e65d4e9763e2ab74cbc1aec616b3f2834bc dist/electrum-4.1.4-16-g648fac709.exe
💬 INFO: Done.
cp: -r not specified; omitting directory '/home/user/wspace/electrum/contrib/build-wine/../../contrib/build-wine/fresh_clone/electrum/contrib/build-wine/dist/electrum'
```
Rebased our branches on latest p4a develop HEAD and buildozer master HEAD.
Re `android.allow_backup = False` in buildozer.spec, now that this setting
has been exposed to buildozer.spec (see https://github.com/kivy/buildozer/pull/1206),
we could finally drop a commit from our branch that did the same:
7a7d415d90
Re commenting out `android.arch` in buildozer.spec, we are setting this
via the ENV VAR in make_apk.
fixes#7198
We recently bumped the bundled version of PyQt (5.14.2->5.15.4).
It seems the new version has a lot more dynamic dependencies.
From https://doc.qt.io/qt-5/linux-requirements.html :
> From Qt 5.15 onwards, Qt does require libxcb 1.11. Also, the -qt-xcb
> configure option got removed that was bundling some of the libs below.
We are using the prebuilt wheels for PyQt5 from PyPI. Presumably those
had previously been built using the -qt-xcb option.
In some places in the script if some directory name had spaces it could cause issues.
I also added quotes around a few other directory names that currently are hardcoded with names without spaces as a way to prevent any future mishap
