#! /bin/sh
#
#  Step 1.
#  Configure for base system so simulator is covered
#
#  Step 2.
#  Make for iOS, iOS simulator and Catalyst
#
#  Step 3.
#  Merge libs into final version for xcode import

export PREFIX="$(pwd)/libsodium-ios"
export IOS32_PREFIX="$PREFIX/tmp/ios32"
export IOS32s_PREFIX="$PREFIX/tmp/ios32s"
export IOS64_PREFIX="$PREFIX/tmp/ios64"
export SIMULATOR32_PREFIX="$PREFIX/tmp/simulator32"
export SIMULATOR64_PREFIX="$PREFIX/tmp/simulator64"
export CATALYST_PREFIX="$PREFIX/tmp/catalyst"
export XCODEDIR="$(xcode-select -p)"

export IOS_SIMULATOR_VERSION_MIN=${IOS_SIMULATOR_VERSION_MIN-"9.0.0"}
export IOS_VERSION_MIN=${IOS_VERSION_MIN-"9.0.0"}

echo
echo "Warnings related to headers being present but not usable are due to functions"
echo "that didn't exist in the specified minimum iOS version level."
echo "They can be safely ignored."
echo

mkdir -p $SIMULATOR32_PREFIX $SIMULATOR64_PREFIX $IOS32_PREFIX $IOS32s_PREFIX $IOS64_PREFIX $CATALYST_PREFIX || exit 1

# Build for the simulator
export BASEDIR="${XCODEDIR}/Platforms/iPhoneSimulator.platform/Developer"
export PATH="${BASEDIR}/usr/bin:$BASEDIR/usr/sbin:$PATH"
export SDK="${BASEDIR}/SDKs/iPhoneSimulator.sdk"

## i386 simulator
export CFLAGS="-O2 -arch i386 -isysroot ${SDK} -mios-simulator-version-min=${IOS_SIMULATOR_VERSION_MIN}"
export LDFLAGS="-arch i386 -isysroot ${SDK} -mios-simulator-version-min=${IOS_SIMULATOR_VERSION_MIN}"

make distclean >/dev/null

if [ -z "$LIBSODIUM_FULL_BUILD" ]; then
  export LIBSODIUM_ENABLE_MINIMAL_FLAG="--enable-minimal"
else
  export LIBSODIUM_ENABLE_MINIMAL_FLAG=""
fi

./configure --host=i686-apple-darwin10 \
  ${LIBSODIUM_ENABLE_MINIMAL_FLAG} \
  --prefix="$SIMULATOR32_PREFIX" || exit 1

NPROCESSORS=$(getconf NPROCESSORS_ONLN 2>/dev/null || getconf _NPROCESSORS_ONLN 2>/dev/null)
PROCESSORS=${NPROCESSORS:-3}

make -j${PROCESSORS} install || exit 1

## x86_64 simulator
export CFLAGS="-O2 -arch x86_64 -isysroot ${SDK} -mios-simulator-version-min=${IOS_SIMULATOR_VERSION_MIN}"
export LDFLAGS="-arch x86_64 -isysroot ${SDK} -mios-simulator-version-min=${IOS_SIMULATOR_VERSION_MIN}"

make distclean >/dev/null

./configure --host=x86_64-apple-darwin10 \
  ${LIBSODIUM_ENABLE_MINIMAL_FLAG} \
  --prefix="$SIMULATOR64_PREFIX"

make -j${PROCESSORS} install || exit 1

# Build for x86_64 macOS (Catalyst)
export BASEDIR="${XCODEDIR}/Platforms/MacOSX.platform/Developer"
export PATH="${BASEDIR}/usr/bin:$BASEDIR/usr/sbin:$PATH"
export SDK="${BASEDIR}/SDKs/MacOSX.sdk"

export CFLAGS="-fembed-bitcode -O2 -arch x86_64 -target x86_64-apple-ios13.0-macabi -isysroot ${SDK}"
export LDFLAGS="-fembed-bitcode -arch x86_64 -target x86_64-apple-ios13.0-macabi -isysroot ${SDK}"

make distclean >/dev/null

./configure --host=x86_64-apple-darwin10 \
  ${LIBSODIUM_ENABLE_MINIMAL_FLAG} \
  --prefix="$CATALYST_PREFIX" || exit 1

make -j${PROCESSORS} install || exit 1

# Build for iOS
export BASEDIR="${XCODEDIR}/Platforms/iPhoneOS.platform/Developer"
export PATH="${BASEDIR}/usr/bin:$BASEDIR/usr/sbin:$PATH"
export SDK="${BASEDIR}/SDKs/iPhoneOS.sdk"

## 32-bit iOS
export CFLAGS="-fembed-bitcode -O2 -mthumb -arch armv7 -isysroot ${SDK} -mios-version-min=${IOS_VERSION_MIN}"
export LDFLAGS="-fembed-bitcode -mthumb -arch armv7 -isysroot ${SDK} -mios-version-min=${IOS_VERSION_MIN}"

make distclean >/dev/null

./configure --host=arm-apple-darwin10 \
  ${LIBSODIUM_ENABLE_MINIMAL_FLAG} \
  --prefix="$IOS32_PREFIX" || exit 1

make -j${PROCESSORS} install || exit 1

## 32-bit armv7s iOS
export CFLAGS="-fembed-bitcode -O2 -mthumb -arch armv7s -isysroot ${SDK} -mios-version-min=${IOS_VERSION_MIN}"
export LDFLAGS="-fembed-bitcode -mthumb -arch armv7s -isysroot ${SDK} -mios-version-min=${IOS_VERSION_MIN}"

make distclean >/dev/null

./configure --host=arm-apple-darwin10 \
  ${LIBSODIUM_ENABLE_MINIMAL_FLAG} \
  --prefix="$IOS32s_PREFIX" || exit 1

make -j${PROCESSORS} install || exit 1

## 64-bit iOS
export CFLAGS="-fembed-bitcode -O2 -arch arm64 -isysroot ${SDK} -mios-version-min=${IOS_VERSION_MIN}"
export LDFLAGS="-fembed-bitcode -arch arm64 -isysroot ${SDK} -mios-version-min=${IOS_VERSION_MIN}"

make distclean >/dev/null

./configure --host=arm-apple-darwin10 \
  ${LIBSODIUM_ENABLE_MINIMAL_FLAG} \
  --prefix="$IOS64_PREFIX" || exit 1

make -j${PROCESSORS} install || exit 1

# Create fat libraries for iOS and simulators
rm -fr -- "$PREFIX/include" "$PREFIX/libsodium.a" 2>/dev/null
mkdir -p -- "$PREFIX/lib"
lipo -create \
  "$SIMULATOR32_PREFIX/lib/libsodium.a" \
  "$CATALYST_PREFIX/lib/libsodium.a" \
  "$IOS32_PREFIX/lib/libsodium.a" \
  "$IOS32s_PREFIX/lib/libsodium.a" \
  "$IOS64_PREFIX/lib/libsodium.a" \
  -output "$PREFIX/lib/libsodium.a"

lipo -create \
  "$SIMULATOR32_PREFIX/lib/libsodium.dylib" \
  "$CATALYST_PREFIX/lib/libsodium.dylib" \
  "$IOS32_PREFIX/lib/libsodium.dylib" \
  "$IOS32s_PREFIX/lib/libsodium.dylib" \
  "$IOS64_PREFIX/lib/libsodium.dylib" \
  -output "$PREFIX/lib/libsodium.dylib"

mv -f -- "$IOS32_PREFIX/include" "$PREFIX/"
install_name_tool -id "@rpath/SODIUM.framework/libsodium.dylib" "$PREFIX/lib/libsodium.dylib"

echo
echo "libsodium has been installed into $PREFIX"
echo
file -- "$PREFIX/lib/libsodium.a"
file -- "$PREFIX/lib/libsodium.dylib"

# Cleanup
rm -rf -- "$PREFIX/tmp"
make distclean >/dev/null