create-ndk-standalone.sh

#! /bin/bash

# based on https://github.com/kennytm/rust-ios-android

set -euo pipefail

if [ -d NDK ]; then
    printf '\e[33;1mStandalone NDK already exists... Delete the NDK folder to make a new one.\e[0m\n\n'
    printf '$ rm -rf NDK\n'
    exit 0
fi

MAKER="$NDK_HOME/build/tools/make_standalone_toolchain.py"

if [ -x "$MAKER" ]; then
    MAKER="$NDK_HOME/build/tools/make_standalone_toolchain.py"
fi

if [ -x "$MAKER" ]; then
    echo 'Creating standalone NDK...'
else
    printf '\e[91;1mPlease install `android-ndk`!\e[0m\n\n'
    printf '$ brew install android-ndk\n'
    exit 1
fi

mkdir NDK
cd NDK

for ARCH in arm64 arm x86 x86_64; do
    echo "($ARCH)..."
    "$MAKER" --arch $ARCH --api 21 --install-dir $ARCH
done

echo 'Updating ./rust/.cargo/config.toml...'

cd ..
mkdir -p rust/.cargo
sed 's|$PWD|'"${PWD}"'|g' cargo-config.toml.template > ./rust/.cargo/config