Create universal frameworks that include binaries for use in an iOS simulator or device.

create-universal-framework-swift.sh

#!/bin/sh

######################################################################
#
# Create universal frameworks that include binaries for use in an iOS
# simulator or device.
#
#
# Author: Andi Wilson
# Created: 03/01/2018
# Updated: 03/19/2020
#
# Adapted from:
# https://stackoverflow.com/a/28806747/612493
#
######################################################################

######################
# Options
######################

APP_PATH="${TARGET_BUILD_DIR}/${WRAPPER_NAME}"
FRAMEWORK_NAME="$PROJECT_NAME"

OUTPUT_DIR="${SRCROOT}/build/Frameworks/iOS"
OUTPUT_DEVICE_DIR="${OUTPUT_DIR}/release"
OUTPUT_SIMULATOR_DIR="${OUTPUT_DIR}/simulator"
OUTPUT_UNIVERSAL_DIR="${OUTPUT_DIR}/fat"

DEVICE_APPENDIX="iphoneos"
SIMULATOR_APPENDIX="iphonesimulator"
UNIVERSAL_APPENDIX="iphoneuniversal"

DEVICE_LIBRARY_DIR="${BUILD_DIR}/${CONFIGURATION}-${DEVICE_APPENDIX}"
SIMULATOR_LIBRARY_DIR="${BUILD_DIR}/${CONFIGURATION}-${SIMULATOR_APPENDIX}"
UNIVERSAL_LIBRARY_DIR="${BUILD_DIR}/${CONFIGURATION}-${UNIVERSAL_APPENDIX}"

DEVICE_LIBRARY_PATH="${DEVICE_LIBRARY_DIR}/${FRAMEWORK_NAME}.framework"
SIMULATOR_LIBRARY_PATH="${SIMULATOR_LIBRARY_DIR}/${FRAMEWORK_NAME}.framework"
UNIVERSAL_LIBRARY_PATH="${UNIVERSAL_LIBRARY_DIR}/${FRAMEWORK_NAME}.framework"

DEVICE_SWIFTMODULE_PATH="${DEVICE_LIBRARY_PATH}/Modules/${FRAMEWORK_NAME}.swiftmodule/"
SIMULATOR_SWIFTMODULE_PATH="${SIMULATOR_LIBRARY_PATH}/Modules/${FRAMEWORK_NAME}.swiftmodule/"
UNIVERSAL_SWIFTMODULE_PATH="${UNIVERSAL_LIBRARY_PATH}/Modules/${FRAMEWORK_NAME}.swiftmodule/"

DEVICE_SWIFT_HEADER="${DEVICE_LIBRARY_PATH}/Headers/${FRAMEWORK_NAME}-Swift.h"
SIMULATOR_SWIFT_HEADER="${SIMULATOR_LIBRARY_PATH}/Headers/${FRAMEWORK_NAME}-Swift.h"
UNIVERSAL_SWIFT_HEADER="${UNIVERSAL_LIBRARY_PATH}/Headers/${FRAMEWORK_NAME}-Swift.h"

######################
# Recursion detection
######################

if [ "$ALREADY_INVOKED" = true ]; then
  echo "Recursion detected. Stopping build."
  exit 1
fi

# Export for next run
export ALREADY_INVOKED=true

######################
# Build frameworks
######################

xcodebuild \
  BITCODE_GENERATION_MODE=bitcode \
  OTHER_CFLAGS="-fembed-bitcode" \
  ONLY_ACTIVE_ARCH=NO \
  -target "${PROJECT_NAME}" \
  -project "${PROJECT_NAME}.xcodeproj" \
  -sdk iphonesimulator \
  -configuration ${CONFIGURATION} \
  clean build \
  CONFIGURATION_BUILD_DIR=${SIMULATOR_LIBRARY_DIR} \
  OBJROOT="${OBJROOT}/DependentBuilds" 2>&1

xcodebuild \
  BITCODE_GENERATION_MODE=bitcode \
  OTHER_CFLAGS="-fembed-bitcode" \
  ONLY_ACTIVE_ARCH=NO \
  -target "${PROJECT_NAME}" \
  -project "${PROJECT_NAME}.xcodeproj" \
  -sdk iphoneos \
  -configuration ${CONFIGURATION} \
  build \
  CONFIGURATION_BUILD_DIR=${DEVICE_LIBRARY_DIR} \
  OBJROOT="${OBJROOT}/DependentBuilds" 2>&1

######################
# Create universal directory
######################

rm -rf "$UNIVERSAL_LIBRARY_DIR"
mkdir "$UNIVERSAL_LIBRARY_DIR"

######################
# Make an universal binary
######################

# Loop through embedded frameworks and create universal binaries
find "$APP_PATH" -name '*.framework' -type d | while read -r THIS_FILE_PATH; do
  THIS_NAME=$(echo "$THIS_FILE_PATH" | sed 's/.*\///' | sed 's/\.[^.]*$//')
  THIS_FILE="${THIS_NAME}.framework"
  THIS_DEVICE_PATH="${DEVICE_LIBRARY_DIR}/${THIS_FILE}"
  THIS_SIMULATOR_PATH="${SIMULATOR_LIBRARY_DIR}/${THIS_FILE}"
  THIS_UNIVERSAL_PATH="${UNIVERSAL_LIBRARY_DIR}/${THIS_FILE}"

  # Create framework directory
  mkdir "$THIS_UNIVERSAL_PATH"

  # Copy framework files
  cp -r "${THIS_DEVICE_PATH}/." "$THIS_UNIVERSAL_PATH" | echo

  # Make universal binary
  lipo "${THIS_SIMULATOR_PATH}/${THIS_NAME}" "${THIS_DEVICE_PATH}/${THIS_NAME}" -create -output "${THIS_UNIVERSAL_PATH}/${THIS_NAME}" | echo
done

# For Swift frameworks, swiftmodule needs to be copied to the universal framework
if [ -d "$SIMULATOR_SWIFTMODULE_PATH" ]; then
  cp -Rf "${SIMULATOR_SWIFTMODULE_PATH}/." "${UNIVERSAL_SWIFTMODULE_PATH}" | echo
fi

if [ -d "$DEVICE_SWIFTMODULE_PATH" ]; then
  cp -Rf "${DEVICE_SWIFTMODULE_PATH}/." "${UNIVERSAL_SWIFTMODULE_PATH}" | echo
fi

# Modify swiftinterface files for compatability
# https://forums.developer.apple.com/thread/123253
find "${UNIVERSAL_SWIFTMODULE_PATH}" \
  -name "*.swiftinterface" \
  -exec sed -i -e "s/${FRAMEWORK_NAME}\.//g" {} \;

# Combine PTVSDK-Swift.h from device and simulator architectures 
# (Xcode 10.2 issue: 48635615)
> ${UNIVERSAL_SWIFT_HEADER}
echo "#if TARGET_OS_SIMULATOR" >> ${UNIVERSAL_SWIFT_HEADER}
cat ${SIMULATOR_SWIFT_HEADER} >> ${UNIVERSAL_SWIFT_HEADER}
echo "#else" >> ${UNIVERSAL_SWIFT_HEADER}
cat ${DEVICE_SWIFT_HEADER} >> ${UNIVERSAL_SWIFT_HEADER}
echo "#endif" >> ${UNIVERSAL_SWIFT_HEADER} 

######################
# Create final copies
######################

# If remnants from a previous build exist, delete them.
if [ -d "${OUTPUT_DIR}" ]; then
  rm -rf "${OUTPUT_DIR}"
fi

mkdir -p $OUTPUT_DEVICE_DIR $OUTPUT_SIMULATOR_DIR $OUTPUT_UNIVERSAL_DIR

cp -Rf "${DEVICE_LIBRARY_PATH}" "$OUTPUT_DEVICE_DIR"
cp -Rf "${SIMULATOR_LIBRARY_PATH}" "$OUTPUT_SIMULATOR_DIR"
cp -Rf "${UNIVERSAL_LIBRARY_PATH}" "$OUTPUT_UNIVERSAL_DIR"