On Ubuntu host, build succeeded; but e.g. on Manjaro host, it failed with:
```
./build.sh: line 233: /opt/electrum/contrib/build-linux/appimage/../../../contrib/build-linux/appimage/.cache/appimage/appimagetool: No such file or directory
```
This slightly increases the AppImage size but allows us to be more
compatible with older distributions.
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taken from Electron-Cash/Electron-Cash@96644acd6fd66f866a86613974bb68bb99f00d8c
It warns about scripts being installed in a location that is not on the
path, but that is inconsequential as they are not used.
-----
taken from Electron-Cash/Electron-Cash@9a29017c5d8906bb04f7e188bf483b0d3ff698f4
When building in docker on macOS, python builds with .exe extension
because the case insensitive file system of macOS leaks into docker.
This causes the build to result in a different output on macOS compared
to Linux. We simply patch sysconfigdata to remove the extension.
Some more info: https://bugs.python.org/issue27631
There are a lot of dupliacted files, testing files and unused libraries
present in the AppImage. Removing these reduces the AppImage size
significantly.
-----
taken from Electron-Cash/Electron-Cash@cff5fb128954853c2c672e2afaa48a40050e7183
There was a problem where Python would not properly include the faketime
timestamp sometimes. This patch replaces faketime with a patch that is
used by Ubuntu for reproducible builds by exporting BUILD_DATE and
BUILD_TIME with the desired values.
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taken from Electron-Cash/Electron-Cash@9532508a3f466aab794fae4f8e314617d5a873f9
We build our own mksquashfs from squashfskit which supports generating
reproducible squashfs images. We use a small wrapper script to remove
the -mkfs-fixed-time which appimagekit passes but squashfskits
mksquashfs does not support.
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taken from Electron-Cash/Electron-Cash@dd1f106f4f500fbf993094cf73da89a5745a0e2c
see AppImage/AppImageKit#929
We already delete unused Qt modules, but we weren't deleting their PyQt5 modules.
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taken from Electron-Cash/Electron-Cash@e044c94677160b6e6bb1a981b22a4b85103de6cb
Importing from PyQt5.Qt is an unnecessary fallback that loads every PyQt5 module.
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taken from Electron-Cash/Electron-Cash@d69471b31d1f25a703588f48ee0cc5afdf1f1f2f
pkg2appimage excludes libusb-1.0.so by default for no good reason:
83483c2971/excludelist (L112)
This can cause an issue when the AppImage loads the systems libusb but the
systems libusb in turn loads libudev from the AppImage. The kernel ABI for
libusb will not be changing so it is safe to bundle it into the AppImage.
-----
taken from Electron-Cash/Electron-Cash@25d45fdcbfa335d83de876ff16e978a058d17e22
SomberNight
Axel Gembe