# Copyright (c) 2020 Eugene Berdnikov
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

# This script allows to convert an iOS framework binary to XCFramework.
# It might be useful to resolve the "Building for iOS Simulator, but the linked
# and embedded framework was built for iOS + iOS Simulator" error in Xcode 12.3.
# The script can accept working directory as a first argument.
# If no arguments passed, script looks for frameworks in the current directory.

IOS_ARCHITECTURES=(arm64 armv7 armv7s)
SIMULATOR_ARCHITECTURES=(i386 x86_64)

realpath() {
    echo "$(cd "$(dirname "$1")" || exit; pwd)/$(basename "$1")"
}

remove_architectures() {
  local FRAMEWORK_EXECUTABLE_PATH="$1"
  shift
  local ARCHITECTURES=("$@")
  for ARCH in "${ARCHITECTURES[@]}"; do
    if lipo "$FRAMEWORK_EXECUTABLE_PATH" -verify_arch "$ARCH"; then
      echo "Removing $ARCH from $(pwd)/$FRAMEWORK_EXECUTABLE_PATH"
      lipo -remove "$ARCH" -output "$FRAMEWORK_EXECUTABLE_PATH" "./$FRAMEWORK_EXECUTABLE_PATH"
    fi
  done
}

if [[ "$#" -gt 0 ]]; then
  SOURCE_PATH=$(realpath "$1")
else
  SOURCE_PATH=$(pwd)
fi

cd "$SOURCE_PATH" || exit
find "$SOURCE_PATH" -name '*.framework' -type d | while read -r FRAMEWORK_PATH; do
  echo "Handling framework in '$FRAMEWORK_PATH'"
  FRAMEWORK_EXECUTABLE_NAME=$(defaults read "$FRAMEWORK_PATH/Info.plist" "CFBundleExecutable")
  FRAMEWORK_DIRECTORY_NAME="$FRAMEWORK_EXECUTABLE_NAME.framework"

  mkdir iOS
  cp -R "$FRAMEWORK_PATH" "iOS/$FRAMEWORK_DIRECTORY_NAME"
  cd iOS || exit
  remove_architectures "$FRAMEWORK_DIRECTORY_NAME/$FRAMEWORK_EXECUTABLE_NAME" "${SIMULATOR_ARCHITECTURES[@]}"
  cd ..

  mkdir Simulator
  cp -R "$FRAMEWORK_PATH" "Simulator/$FRAMEWORK_DIRECTORY_NAME"
  cd Simulator || exit
  remove_architectures "$FRAMEWORK_DIRECTORY_NAME/$FRAMEWORK_EXECUTABLE_NAME" "${IOS_ARCHITECTURES[@]}"
  defaults write "$SOURCE_PATH/Simulator/$FRAMEWORK_DIRECTORY_NAME/Info.plist" CFBundleSupportedPlatforms -array iPhoneSimulator
  cd ..

  xcodebuild -create-xcframework -framework "iOS/$FRAMEWORK_DIRECTORY_NAME" -framework "Simulator/$FRAMEWORK_DIRECTORY_NAME" -output "$FRAMEWORK_EXECUTABLE_NAME.xcframework"
  rm -rf iOS
  rm -rf Simulator
done