TERMUX_PKG_HOMEPAGE=https://swift.org/
TERMUX_PKG_DESCRIPTION="Swift is a high-performance system programming language"
TERMUX_PKG_LICENSE="Apache-2.0, NCSA"
TERMUX_PKG_MAINTAINER="@buttaface"
TERMUX_PKG_VERSION=5.7
TERMUX_PKG_REVISION=2
SWIFT_RELEASE="RELEASE"
TERMUX_PKG_SRCURL=https://github.com/apple/swift/archive/swift-$TERMUX_PKG_VERSION-$SWIFT_RELEASE.tar.gz
TERMUX_PKG_SHA256=5385aa70a62d57087c4f34e5cde0f0154dc9e3916bf4ac95a21594433e7db5f8
TERMUX_PKG_HOSTBUILD=true
TERMUX_PKG_DEPENDS="clang, libandroid-glob, libandroid-posix-semaphore, libandroid-spawn, libcurl, libicu, libicu-static, libsqlite, libuuid, libxml2, libdispatch, llbuild"
TERMUX_PKG_BUILD_DEPENDS="rsync"
TERMUX_PKG_BLACKLISTED_ARCHES="i686"
TERMUX_PKG_NO_STATICSPLIT=true
# Building swift uses CMake, but the standard
# termux_step_configure_cmake function is not used. Instead, we set
# TERMUX_PKG_FORCE_CMAKE to make the build system aware that CMake is
# needed.
TERMUX_PKG_FORCE_CMAKE=true
TERMUX_CMAKE_BUILD=Ninja

SWIFT_COMPONENTS="autolink-driver;compiler;clang-resource-dir-symlink;swift-remote-mirror;parser-lib;license;sourcekit-inproc;stdlib;sdk-overlay"
SWIFT_TOOLCHAIN_FLAGS="-RA --llvm-targets-to-build='X86;ARM;AArch64' -j $TERMUX_MAKE_PROCESSES"
SWIFT_PATH_FLAGS="--build-subdir=. --install-destdir=/ --install-prefix=$TERMUX_PREFIX"
SWIFT_BUILD_FLAGS="$SWIFT_TOOLCHAIN_FLAGS $SWIFT_PATH_FLAGS"

SWIFT_ARCH=$TERMUX_ARCH
test $SWIFT_ARCH == 'arm' && SWIFT_ARCH='armv7'

termux_step_post_get_source() {
	# The Swift build-script requires a particular organization of source
	# directories, which the following sets up.
	mkdir .temp
	mv [a-zA-Z]* .temp/
	mv .temp swift

	declare -A library_checksums
	library_checksums[swift-cmark]=1c49d849f4bc4664f88f2938bd8410f29e107b6ae51ef038599b23eae11b4325
	library_checksums[llvm-project]=0361c7d65344b7bcfea26cccf63387f137192e21268f84956de5be66a25ac7c9
	library_checksums[swift-experimental-string-processing]=d7282d9cbded01dd944022ec1a6ad9e1157bb0aedd45f2baa7a5ea351dc95862
	library_checksums[swift-corelibs-libdispatch]=b8398571561f3e94053309c55029726af541180e3323ea68e3ca544bbdc57a10
	library_checksums[swift-corelibs-foundation]=3a50954f6c821448dec94f3da51e6a101f8fba2ee3da8327637a9150f865411e
	library_checksums[swift-corelibs-xctest]=c801bf4ca0727214036eb9aa2a8c27b6954b0063569147a4cc9d2a212b9ed9cf
	library_checksums[swift-llbuild]=048bfb7f8b3baece8fc3b4f30ed7a96619a7817c5dbe02976c087eafb610bcd3
	library_checksums[swift-argument-parser]=a4d4c08cf280615fe6e00752ef60e28e76f07c25eb4706a9269bf38135cd9c3f
	library_checksums[Yams]=b31b6df500d6191368c93f605690ca9857fff7c6fd1c8897e9765fb624535c63
	library_checksums[swift-collections]=575cf0f88d9068411f9acc6e3ca5d542bef1cc9e87dc5d69f7b5a1d5aec8c6b6
	library_checksums[swift-crypto]=86d6c22c9f89394fd579e967b0d5d0b6ce33cdbf52ba70f82fa313baf70c759f
	library_checksums[swift-system]=865b8c380455eef27e73109835142920c60ae4c4f4178a3d12ad04acc83f1371
	library_checksums[swift-driver]=12a074d874866f76d3e58266c68cdb75d3c27ea07e529902783662ec4d495393
	library_checksums[swift-tools-support-core]=8c9d098f4c2420496fc480f8de3b8f4edb19fb29d78f63c1869073343ccdded7
	library_checksums[swift-package-manager]=9a6839811be8fc9de822244df96b54473cd847c87a6ff21e8016fc6f8da65a13
	library_checksums[indexstore-db]=cee2355b7bc120b3a3fa7ecf00f54819aab298829547a629643d00c1add53269
	library_checksums[sourcekit-lsp]=e246a3320bd09845cf06b18beccbcf1b9994ee32616e9033f11a536c62d304d5

	for library in "${!library_checksums[@]}"; do \
		GH_ORG="apple"
		if [ "$library" = "swift-argument-parser" ]; then
			SRC_VERSION="1.0.3"
			TAR_NAME=$SRC_VERSION
		elif [ "$library" = "swift-collections" ]; then
			SRC_VERSION="1.0.1"
			TAR_NAME=$SRC_VERSION
		elif [ "$library" = "swift-crypto" ]; then
			SRC_VERSION="1.1.5"
			TAR_NAME=$SRC_VERSION
		elif [ "$library" = "swift-system" ]; then
			SRC_VERSION="1.1.1"
			TAR_NAME=$SRC_VERSION
		elif [ "$library" = "Yams" ]; then
			GH_ORG="jpsim"
			SRC_VERSION="5.0.0"
			TAR_NAME=$SRC_VERSION
		else
			SRC_VERSION=$SWIFT_RELEASE
			TAR_NAME=swift-$TERMUX_PKG_VERSION-$SWIFT_RELEASE
		fi

		termux_download \
			https://github.com/$GH_ORG/$library/archive/$TAR_NAME.tar.gz \
			$TERMUX_PKG_CACHEDIR/$library-$SRC_VERSION.tar.gz \
			${library_checksums[$library]}
		tar xf $TERMUX_PKG_CACHEDIR/$library-$SRC_VERSION.tar.gz
		mv $library-$TAR_NAME $library
	done

	mv swift-cmark cmark
	mv swift-llbuild llbuild
	mv Yams yams
	mv swift-package-manager swiftpm
}

termux_step_host_build() {
	if [ "$TERMUX_ON_DEVICE_BUILD" = "false" ]; then
		termux_setup_cmake
		termux_setup_ninja
		termux_setup_swift

		local CLANG=$(command -v clang)
		local CLANGXX=$(command -v clang++)

		# The Ubuntu CI may not have clang/clang++ in its path so explicitly set it
		# to clang-12 instead.
		if [ -z "$CLANG" ]; then
			CLANG=$(command -v clang-12)
			CLANGXX=$(command -v clang++-12)
		fi

		# Natively compile llvm-tblgen and some other files needed later.
		SWIFT_BUILD_ROOT=$TERMUX_PKG_HOSTBUILD_DIR $TERMUX_PKG_SRCDIR/swift/utils/build-script \
		-R --no-assertions -j $TERMUX_MAKE_PROCESSES $SWIFT_PATH_FLAGS \
		--skip-build-cmark --skip-build-llvm --skip-build-swift --skip-early-swift-driver \
		--build-toolchain-only --host-cc=$CLANG --host-cxx=$CLANGXX
	fi
}

termux_step_make() {
	# The Swift compiler searches for the clang headers, so symlink against them using the clang major version.
	export TERMUX_CLANG_VERSION=$(. $TERMUX_SCRIPTDIR/packages/libllvm/build.sh; echo $LLVM_MAJOR_VERSION)

	if [ "$TERMUX_ON_DEVICE_BUILD" = "false" ]; then
	        termux_setup_swift
		ln -sf $TERMUX_PKG_HOSTBUILD_DIR/llvm-linux-x86_64 $TERMUX_PKG_BUILDDIR/llvm-linux-x86_64

		BOOTSTRAP=
		test $SWIFT_ARCH == 'armv7' && BOOTSTRAP='--bootstrapping=off'

		SWIFT_BUILD_FLAGS="$SWIFT_BUILD_FLAGS --android
		--android-ndk $TERMUX_STANDALONE_TOOLCHAIN --android-arch $SWIFT_ARCH
		--build-toolchain-only --skip-local-build --skip-local-host-install
		--cross-compile-hosts=android-$SWIFT_ARCH $BOOTSTRAP
		--cross-compile-deps-path=$(dirname $TERMUX_PREFIX)
		--native-swift-tools-path=$SWIFT_BINDIR
		--native-clang-tools-path=$SWIFT_BINDIR
		--cross-compile-append-host-target-to-destdir=False"
	fi

	SWIFT_BUILD_ROOT=$TERMUX_PKG_BUILDDIR $TERMUX_PKG_SRCDIR/swift/utils/build-script \
	$SWIFT_BUILD_FLAGS --xctest -b -p --swift-driver --sourcekit-lsp \
	--android-api-level $TERMUX_PKG_API_LEVEL \
	--build-swift-static-stdlib --swift-install-components=$SWIFT_COMPONENTS \
	--llvm-install-components=IndexStore --install-llvm --install-swift \
	--install-libdispatch --install-foundation --install-xctest --install-llbuild \
	--install-swiftpm --install-swift-driver --install-sourcekit-lsp
}

termux_step_make_install() {
	rm $TERMUX_PREFIX/lib/swift/pm/llbuild/libllbuild.so
	rm $TERMUX_PREFIX/lib/swift/android/lib{dispatch,BlocksRuntime}.so

	if [ "$TERMUX_ON_DEVICE_BUILD" = "false" ]; then
		rm $TERMUX_PREFIX/swiftpm-android-$SWIFT_ARCH.json
		mv $TERMUX_PREFIX/glibc-native.modulemap \
			$TERMUX_PREFIX/lib/swift/android/$SWIFT_ARCH/glibc.modulemap
	fi
}