#!/usr/bin/env bash
#
# build-android
#
# This source file is part of the Swift.org open source project
#
# Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
# Licensed under Apache License v2.0 with Runtime Library Exception
#
# See https://swift.org/LICENSE.txt for license information
# See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors

set -e

SWIFT_PATH="$( cd "$(dirname $0)/.." && pwd )" 

ANDROID_NDK_PATH="${ANDROID_NDK_PATH:?Please set the Android NDK path in the ANDROID_NDK_PATH environment variable}"
ANDROID_ICU_PATH=${SWIFT_PATH}/libiconv-libicu-android

SWIFT_ANDROID_TOOLCHAIN_PATH="${SWIFT_PATH}/swift-android-toolchain"
SWIFT_ANDROID_BUILD_PATH="${SWIFT_PATH}/build/Ninja-ReleaseAssert"

cd ${SWIFT_PATH}/swift-corelibs-foundation

mkdir -p .build
cd .build

ANDROID_STANDALONE_TOOLCHAIN=`realpath ./android-standalone-toolchain`
ANDROID_STANDALONE_SYSROOT=$ANDROID_STANDALONE_TOOLCHAIN/sysroot

if [ ! -d android-standalone-toolchain ]; then
    echo Creating Android standalone toolchain ...
    $ANDROID_NDK_PATH/build/tools/make_standalone_toolchain.py --api 21 --arch arm --stl libc++ --install-dir $ANDROID_STANDALONE_TOOLCHAIN --force -v
fi

export PATH=$ANDROID_STANDALONE_TOOLCHAIN/bin:$PATH
export CC=$ANDROID_STANDALONE_TOOLCHAIN/bin/arm-linux-androideabi-clang
export CXX=$ANDROID_STANDALONE_TOOLCHAIN/bin/arm-linux-androideabi-clang++
export AR=$ANDROID_STANDALONE_TOOLCHAIN/bin/arm-linux-androideabi-ar
export AS=$ANDROID_STANDALONE_TOOLCHAIN/bin/arm-linux-androideabi-as
export LD=$ANDROID_STANDALONE_TOOLCHAIN/bin/arm-linux-androideabi-ld
export RANLIB=$ANDROID_STANDALONE_TOOLCHAIN/bin/arm-linux-androideabi-ranlib
export NM=$ANDROID_STANDALONE_TOOLCHAIN/bin/arm-linux-androideabi-nm
export STRIP=$ANDROID_STANDALONE_TOOLCHAIN/bin/arm-linux-androideabi-strip
export CHOST=arm-linux-androideabi
export ARCH_FLAGS="-march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16"
export ARCH_LINK="-march=armv7-a -Wl,--fix-cortex-a8"
export CPPFLAGS=" ${ARCH_FLAGS} -fpic -ffunction-sections -funwind-tables -fstack-protector -fno-strict-aliasing "
export CXXFLAGS=" ${ARCH_FLAGS} -fpic -ffunction-sections -funwind-tables -fstack-protector -fno-strict-aliasing -frtti -fexceptions -std=c++11 -Wno-error=unused-command-line-argument "
export CFLAGS=" ${ARCH_FLAGS} -fpic -ffunction-sections -funwind-tables -fstack-protector -fno-strict-aliasing "
export LDFLAGS=" ${ARCH_LINK} "

if [ ! -d curl ]; then
    git clone https://github.com/curl/curl.git
fi
if [ ! -f $ANDROID_STANDALONE_SYSROOT/usr/lib/libcurl.so ]; then
    pushd curl
        autoreconf -i
        ./configure --host=arm-linux-androideabi --enable-shared --disable-static --disable-dependency-tracking --with-zlib=$ANDROID_STANDALONE_SYSROOT/usr --with-ssl=$ANDROID_STANDALONE_SYSROOT/usr --without-ca-bundle --without-ca-path --enable-ipv6 --enable-http --enable-ftp --disable-file --disable-ldap --disable-ldaps --disable-rtsp --disable-proxy --disable-dict --disable-telnet --disable-tftp --disable-pop3 --disable-imap --disable-smtp --disable-gopher --disable-sspi --disable-manual --target=arm-linux-androideabi --build=x86_64-unknown-linux-gnu --prefix=$ANDROID_STANDALONE_SYSROOT/usr
        make
        make install
    popd
fi
if [ ! -d libxml2 ]; then
    git clone git://git.gnome.org/libxml2
fi
if [ ! -f $ANDROID_STANDALONE_SYSROOT/usr/lib/libxml2.so ]; then
    pushd libxml2
        autoreconf -i
        ./configure --with-sysroot=$ANDROID_STANDALONE_SYSROOT --with-zlib=$ANDROID_STANDALONE_SYSROOT/usr --prefix=$ANDROID_STANDALONE_SYSROOT/usr --host=$CHOST --without-lzma --disable-static --enable-shared --without-http --without-html --without-ftp
        make libxml2.la 
        make install-libLTLIBRARIES 
        pushd include
            make install
        popd
    popd
fi
if [ ! -f libFoundation.so ]; then
    pushd $ANDROID_STANDALONE_SYSROOT

        # Move dispatch public and private headers to the directory foundation is expecting to get it
        mkdir -p $ANDROID_STANDALONE_SYSROOT/usr/include/dispatch
        cp $SWIFT_PATH/swift-corelibs-libdispatch/dispatch/*.h $ANDROID_STANDALONE_SYSROOT/usr/include/dispatch
        cp $SWIFT_PATH/swift-corelibs-libdispatch/private/*.h $ANDROID_STANDALONE_SYSROOT/usr/include/dispatch
	
        pushd $SWIFT_PATH
            pushd swift-corelibs-foundation
                # Libfoundation script is not completely prepared to handle cross compilation yet.
                ln -sf $SWIFT_ANDROID_BUILD_PATH/swift-linux-x86_64/lib/swift $ANDROID_STANDALONE_SYSROOT/usr/lib/
                cp $SWIFT_ANDROID_BUILD_PATH/swift-linux-x86_64/lib/swift/android/armv7/* $SWIFT_ANDROID_BUILD_PATH/swift-linux-x86_64/lib/swift/android/

                # Search path for curl seems to be wrong in foundation
                #cp -r .build/openssl-1.0.2l/ssl $ANDROID_STANDALONE_SYSROOT/usr/include
                cp -r .build/curl/include/curl $ANDROID_STANDALONE_SYSROOT/usr/include
                if [ ! -e $ANDROID_STANDALONE_SYSROOT/usr/include/curl/curl ]; then
                    ln -s $ANDROID_STANDALONE_SYSROOT/usr/include/curl $ANDROID_STANDALONE_SYSROOT/usr/include/curl/curl
                fi
                if [ ! -e $ANDROID_STANDALONE_SYSROOT/usr/include/libxml ]; then
                    ln -s $ANDROID_STANDALONE_SYSROOT/usr/include/libxml2/libxml $ANDROID_STANDALONE_SYSROOT/usr/include/libxml
                fi
 
                env \
                    SWIFTC="$SWIFT_ANDROID_BUILD_PATH/swift-linux-x86_64/bin/swiftc" \
                    CLANG="$SWIFT_ANDROID_BUILD_PATH/llvm-linux-x86_64/bin/clang" \
                    SWIFT="$SWIFT_ANDROID_BUILD_PATH/swift-linux-x86_64/bin/swift" \
                    SDKROOT="$SWIFT_ANDROID_BUILD_PATH/swift-linux-x86_64" \
                    BUILD_DIR="$SWIFT_ANDROID_BUILD_PATH/foundation-linux-x86_64" \
                    DSTROOT="/" \
                    PREFIX="/usr" \
                    CFLAGS="-DDEPLOYMENT_ENABLE_LIBDISPATCH --sysroot=$ANDROID_NDK_PATH/platforms/android-21/arch-arm -I$ANDROID_ICU_PATH/armeabi-v7a/include -I${SDKROOT}/lib/swift -I$ANDROID_NDK_PATH/sources/android/support/include -I$ANDROID_STANDALONE_SYSROOT/usr/include -I$SWIFT_PATH/swift-corelibs-foundation/closure" \
                    SWIFTCFLAGS="-DDEPLOYMENT_ENABLE_LIBDISPATCH -I$ANDROID_NDK_PATH/platforms/android-21/arch-arm/usr/include" \
                    LDFLAGS="-fuse-ld=gold --sysroot=$ANDROID_NDK_PATH/platforms/android-21/arch-arm -L$ANDROID_NDK_PATH/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x -L$ANDROID_ICU_PATH/armeabi-v7a -L$ANDROID_STANDALONE_SYSROOT/usr/lib -ldispatch " \
                    ./configure \
                        Release \
                        --target=armv7-none-linux-androideabi \
                        --sysroot=$ANDROID_STANDALONE_SYSROOT \
                        -DXCTEST_BUILD_DIR=$SWIFT_ANDROID_BUILD_PATH/xctest-linux-x86_64 \
                        -DLIBDISPATCH_SOURCE_DIR=$SWIFT_PATH/swift-corelibs-libdispatch \
                        -DLIBDISPATCH_BUILD_DIR=$SWIFT_PATH/swift-corelibs-libdispatch &&

                cp -r /usr/include/uuid $ANDROID_STANDALONE_SYSROOT/usr/include 
                sed -i~ "s/-I.\/ -I\/usr\/include\/x86_64-linux-gnu  -I\/usr\/include\/x86_64-linux-gnu    -I\/usr\/include\/libxml2//" build.ninja
                sed -i~ "s/-licui18n/-licui18nswift/g" build.ninja
                sed -i~ "s/-licuuc/-licuucswift/g" build.ninja
                sed -i~ "s/-licudata/-licudataswift/g" build.ninja

                ninja 
		
                # There's no installation script for foundation yet, so the installation needs to be done manually.
                # Apparently the installation for the main script is in swift repo.
                rsync -av $SWIFT_ANDROID_BUILD_PATH/foundation-linux-x86_64/Foundation/Foundation.swift* $SWIFT_ANDROID_TOOLCHAIN_PATH/usr/lib/swift/android/armv7/
                rsync -av $ANDROID_STANDALONE_SYSROOT/usr/lib/libxml2.* $ANDROID_STANDALONE_SYSROOT/usr/lib/libcurl.* $ANDROID_ICU_PATH/armeabi-v7a/libicu{uc,i18n,data}swift.so $ANDROID_NDK_PATH/sources/cxx-stl/llvm-libc++/libs/armeabi-v7a/libc++_shared.so $SWIFT_ANDROID_BUILD_PATH/foundation-linux-x86_64/Foundation/libFoundation.so  $SWIFT_ANDROID_TOOLCHAIN_PATH/usr/lib/swift/android

                # prep install so it can be used to build foundation
                cp -r $SWIFT_PATH/swift-corelibs-foundation/.build/libxml2/include/libxml $SWIFT_ANDROID_TOOLCHAIN_PATH/usr/lib/swift
                cp -r $SWIFT_PATH/swift-corelibs-foundation/.build/curl/include/curl $SWIFT_ANDROID_TOOLCHAIN_PATH/usr/lib/swift
            popd
        popd
    popd
fi