Build script for entire Android stack on a Mac for Godot 3.x

compile_android_all_mac.sh

#!/bin/bash

# Build engine
scons platform=osx arch=arm64

# Build Android code
scons platform=android target=release android_arch=armv7
scons platform=android target=release_debug android_arch=armv7

scons platform=android target=release android_arch=arm64v8
scons platform=android target=release_debug android_arch=arm64v8

scons platform=android target=release android_arch=x86
scons platform=android target=release_debug android_arch=x86

scons platform=android target=release android_arch=x86_64
scons platform=android target=release_debug android_arch=x86_64

# Build Android templates - will make a "FAT" apk as templates
pushd platform/android/java
./gradlew generateGodotTemplates
popd

# Optionally run the created executable
./bin/godot.osx.tools.arm64

# Do not forget that, if you run this and want to use it immediately, you have to delete your installed Android Build Template and load it from the generated android_source.zip file in bin, not to mention copy the template files to the correct place, or use them as custom templates in your export preset.