create-android-project

#!/bin/bash
set -e

function die() {
    echo "$1" 1>&2
    exit 1
}

IOS_PROJECT_DIR=${IOS_PROJECT_DIR:-.}
SCRIPT_PATH=`dirname $0`
TEMPLATE_PATH=${SCRIPT_PATH}/samples/getting-started

[[ ! -d "${IOS_PROJECT_DIR}/android" ]] \
    || die "The directory '${IOS_PROJECT_DIR}/android' already exists. Remove it and try again."


BUNDLE_IDENTIFIER=`grep -m 1 PRODUCT_BUNDLE_IDENTIFIER ${IOS_PROJECT_DIR}/*.xcodeproj/project.pbxproj | xargs | cut -d ' ' -f 3 | sed 's~;~~g'`
[[ $BUNDLE_IDENTIFIER ]] || die "your current working directory doesn't seem to be an xcode project"


APP_NAME=${BUNDLE_IDENTIFIER##*.}
PACKAGE=${BUNDLE_IDENTIFIER%.*}

echo "Found iOS Target '${PACKAGE}.${APP_NAME}'"
echo


# We assume the iOS dir equals the project name
TARGET_SOURCES_DIRECTORY=${IOS_PROJECT_DIR}/${APP_NAME}

echo "Creating ${IOS_PROJECT_DIR}/CMakeLists.txt"
cp "${TEMPLATE_PATH}/CMakeLists.txt" .


echo "Creating ${TARGET_SOURCES_DIRECTORY}/androidMain.swift with UIApplicationDelegate class 'AppDelegate'"
cp "${TEMPLATE_PATH}/DemoApp/androidMain.swift" "$TARGET_SOURCES_DIRECTORY"/

cp -R "${TEMPLATE_PATH}/android" .
rm -rf ${IOS_PROJECT_DIR}/android/{.idea,.gradle,build,android.iml,app/{.externalNativeBuild,build}}

PACKAGE_WITH_FORWARDSLASHES=${PACKAGE/.//} # e.g. com/example/DemoApp
rm -rf ${IOS_PROJECT_DIR}/android/app/src/main/java/
mkdir -p "${IOS_PROJECT_DIR}/android/app/src/main/java/${PACKAGE_WITH_FORWARDSLASHES}"

PATH_TO_MAIN_ACTIVITY="${TEMPLATE_PATH}/android/app/src/main/java/com/example/MainActivity.kt"
cp $PATH_TO_MAIN_ACTIVITY "${IOS_PROJECT_DIR}/android/app/src/main/java/${PACKAGE_WITH_FORWARDSLASHES}"

echo "Creating Android project at '${IOS_PROJECT_DIR}/android'"

FILES_TO_CHANGE=(
    "CMakeLists.txt"
    "android/app/build.gradle"
    "android/app/src/main/AndroidManifest.xml"
    "android/app/CMakeLists.txt"
    "android/app/src/main/java/${PACKAGE_WITH_FORWARDSLASHES}/MainActivity.kt"
)

for file in ${IOS_PROJECT_DIR}/${FILES_TO_CHANGE[@]}
do
    sed -i '' "s~DemoApp~${APP_NAME}~g" $file
    sed -i '' "s~com.example~${PACKAGE}~g" $file
done

# adjust path to UIKit
sed -i '' "s~../../../~../UIKit/~g" ${IOS_PROJECT_DIR}/android/settings.gradle
sed -i '' "s~../../~./UIKit/~g" ${IOS_PROJECT_DIR}/CMakeLists.txt
sed -i '' "s~../../../../~../../UIKit/~g" ${IOS_PROJECT_DIR}/android/app/CMakeLists.txt

PACKAGE_WITH_UNDERSCORES=${PACKAGE/./_} # e.g. com_example_DemoApp
sed -i '' "s~com_example~${PACKAGE_WITH_UNDERSCORES}~g" ${TARGET_SOURCES_DIRECTORY}/androidMain.swift

echo
echo "Done."