# Description: A collection of tools, libraries and tests for shader compilation.
# URL: https://github.com/google/shaderc
# Maintainer: Danny Rawlins, crux at romster dot me
# Depends on: glslang spirv-tools
# Optional: asciidoctor

name=shaderc
version=2021.2
## DEPS
_spirv_headers=f027d53ded7e230e008d37c8b47ede7cd308e19d
release=1
source=(https://github.com/google/shaderc/archive/v$version/$name-v$version.tar.gz
	https://github.com/KhronosGroup/SPIRV-Headers/archive/$_spirv_headers/SPIRV-Headers-$_spirv_headers.tar.gz
	glslc.1)

build() {
	mkdir -p $name-$version/third_party/spirv-headers
	mv SPIRV-Headers-$_spirv_headers/* $name-$version/third_party/spirv-headers

	# de-vendor libs and disable git versioning
	sed '/examples/d;/third_party/d' -i $name-$version/CMakeLists.txt
	sed '/build-version/d' -i $name-$version/glslc/CMakeLists.txt
	cat <<- EOF > $name-$version/glslc/src/build-version.inc
"${version}\\n"
"$(prt-get info spirv-tools | awk '/^Version:/ {print $2}')\\n"
"$(prt-get info glslang | awk '/^Version:/ {print $2}')\\n"
EOF

	prt-get isinst ninja && PKGMK_SHADERC+=' -G Ninja'

	cmake -S $name-$version -B build $PKGMK_SHADERC \
		-D CMAKE_INSTALL_PREFIX=/usr \
		-D CMAKE_INSTALL_LIBDIR=lib \
		-D CMAKE_BUILD_TYPE=Release \
		-D CMAKE_CXX_FLAGS_RELEASE="$CXXFLAGS" \
		-D CMAKE_C_FLAGS_RELEASE="$CFLAGS" \
		-D CMAKE_EXE_LINKER_FLAGS="$LDFLAGS -Wl,-z,defs" \
		-D SHADERC_SKIP_TESTS=ON \
		-D glslang_SOURCE_DIR:PATH='/usr/include/glslang' \
		-D SPIRV-Headers_SOURCE_DIR:PATH="$SRC/$name-$version/third_party/spirv-headers"

	cmake --build build -j ${JOBS:-1}
	DESTDIR=$PKG cmake --install build

	if [ -e '/usr/bin/asciidoctor' ]; then
		cd $name-$version/glslc
		asciidoctor -b manpage README.asciidoc -o glslc.1
		install -D -m 0644 -t $PKG/usr/share/man/man1 glslc.1
		cd -
	else
		install -D -m 0644 -t $PKG/usr/share/man/man1 $SRC/glslc.1
	fi
}