Unless you really want to use the squashfs uruntime, there is no real reason to use this appimagetool, it only supports squashfs.
Use the DWARFS uruntime, it is a lot better in every single measurable way, you can use this script instead for that.
This is a fork of AppImage/appimagetool that uses the squashfs uruntime instead of the type2-runtime by default.
The uruntime is fully compatible to with the type2-runtime and offers advatnages such as:
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Automatically extract and run when fuse is not available.
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Keep the filesystem mounted for even faster launch times.
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Easily set extra env variables by making a
$0.envfile with the variables to be set, similar to the existing portable$0.homeand$0.configfeature of the type2-runtime. -
Have a portable
~/.local/sharedir by making a$0.sharedirectory.