wee8.genrule_cmd

#!/bin/bash

set -e

# Works on Linux-{x86_64,s390x,aarch64,ppc64le} and macOS-{x86_64,arm64}.
ARCH="$$(uname -m)"
SYSTEM="$$(uname -s)"
PLATFORM="$${SYSTEM}-$${ARCH}"

case $${PLATFORM} in
Linux-x86_64|Linux-s390x|Linux-aarch64|Linux-ppc64le)
  ;;
Darwin-x86_64|Darwin-arm64)
  ;;
MSYS_NT-*-x86_64)
  echo "WARNING: wee8 is currently untested on $${PLATFORM}." >&2
  ;;
*)
  echo "ERROR: wee8 is currently not supported on $${PLATFORM}." >&2
  exit 1
esac

# Bazel magic.
ROOT=$$(dirname $(rootpath wee8/BUILD.gn))/..
pushd $$ROOT/wee8

# Clean after previous build.
rm -rf out/wee8

# Export compiler configuration.
export CXXFLAGS="$${CXXFLAGS-} -Wno-sign-compare -Wno-deprecated-copy -Wno-unknown-warning-option -Wno-range-loop-analysis -Wno-shorten-64-to-32"
if [[ ( $${SYSTEM} == "Darwin" && $${CXX-} == "" ) || $${CXX-} == *clang* ]]; then
  export IS_CLANG=true
  export CC=$${CC:-clang}
  export CXX=$${CXX:-clang++}
  export CXXFLAGS="$${CXXFLAGS} -Wno-implicit-int-float-conversion -Wno-builtin-assume-aligned-alignment -Wno-final-dtor-non-final-class"
else
  export IS_CLANG=false
  export CC=$${CC:-gcc}
  export CXX=$${CXX:-g++}
fi

export AR=$${AR:-ar}
export NM=$${NM:-nm}

# Hook sanitizers.
if [[ $${ENVOY_ASAN-} == "1" ]]; then
  WEE8_BUILD_ARGS+=" is_asan=true"
  WEE8_BUILD_ARGS+=" is_lsan=true"
fi
if [[ $${ENVOY_UBSAN_VPTR-} == "1" ]]; then
  WEE8_BUILD_ARGS+=" is_ubsan=true"
  WEE8_BUILD_ARGS+=" is_ubsan_vptr=true"
fi
if [[ $${ENVOY_MSAN-} == "1" ]]; then
  WEE8_BUILD_ARGS+=" is_msan=true"
  export LDFLAGS="$${LDFLAGS} -L/opt/libcxx_msan/lib -Wl,-rpath,/opt/libcxx_msan/lib"
fi
if [[ $${ENVOY_TSAN-} == "1" ]]; then
  WEE8_BUILD_ARGS+=" is_tsan=true"
  export LDFLAGS="$${LDFLAGS} -L/opt/libcxx_tsan/lib -Wl,-rpath,/opt/libcxx_tsan/lib"
fi

# Debug/release build.
if [[ $(COMPILATION_MODE) == "dbg" && $${ENVOY_UBSAN_VPTR-} != "1" && $${ENVOY_MSAN-} != "1" && $${ENVOY_TSAN-} != "1" ]]; then
  WEE8_BUILD_ARGS+=" is_debug=true"
  WEE8_BUILD_ARGS+=" v8_symbol_level=2"
  WEE8_BUILD_ARGS+=" v8_optimized_debug=false"
else
  WEE8_BUILD_ARGS+=" is_debug=false"
  WEE8_BUILD_ARGS+=" v8_symbol_level=1"
  WEE8_BUILD_ARGS+=" v8_enable_handle_zapping=false"
fi

# Clang or not Clang, that is the question.
WEE8_BUILD_ARGS+=" is_clang=$$IS_CLANG"
# Hack to disable bleeding-edge compiler flags.
WEE8_BUILD_ARGS+=" use_xcode_clang=true"
# Use local toolchain.
WEE8_BUILD_ARGS+=" custom_toolchain=\"//build/toolchain/linux/unbundle:default\""
# Use local stdlibc++ / libc++.
WEE8_BUILD_ARGS+=" use_custom_libcxx=false"
# Use local sysroot.
WEE8_BUILD_ARGS+=" use_sysroot=false"
# Disable unused GLib2 dependency.
WEE8_BUILD_ARGS+=" use_glib=false"
# Expose debug symbols.
WEE8_BUILD_ARGS+=" v8_expose_symbols=true"
# Build monolithic library.
WEE8_BUILD_ARGS+=" is_component_build=false"
WEE8_BUILD_ARGS+=" v8_enable_i18n_support=false"
WEE8_BUILD_ARGS+=" v8_enable_gdbjit=false"
WEE8_BUILD_ARGS+=" v8_use_external_startup_data=false"
# Disable read-only heap, since it's leaky and HEAPCHECK complains about it.
# TODO(PiotrSikora): remove when fixed upstream.
WEE8_BUILD_ARGS+=" v8_enable_shared_ro_heap=false"

# Support arm64.
if [[ $${ARCH} == "aarch64" || $${ARCH} == "arm64" ]]; then
  WEE8_BUILD_ARGS+=" target_cpu=\"arm64\""
fi

# Support ppc64le.
if [[ $${ARCH} == "ppc64le" ]]; then
  WEE8_BUILD_ARGS+=" target_cpu=\"ppc64\""
fi

# Select gn tool for the current platform.
if [[ -f /etc/centos-release ]] && [[ $$(cat /etc/centos-release) =~ "CentOS Linux release 7" ]] && [[ -x "$$(command -v gn)" ]]; then
  # Use system default on CentOS 7, as it has an old version of GLIBC which is otherwise incompatible with the prebuilt binary.
  gn=$$(command -v gn)
elif [[ $${PLATFORM} == "Darwin-x86_64" ]]; then
  gn=buildtools/mac/gn
elif [[ $${PLATFORM} == "Darwin-arm64" ]]; then
  gn=buildtools/mac-arm64/gn
elif [[ $${PLATFORM} == "Linux-x86_64" ]]; then
  gn=buildtools/linux64/gn
elif [[ $${PLATFORM} == "Linux-aarch64" ]]; then
  gn=buildtools/linux-arm64/gn
elif [[ $${PLATFORM} == MSYS_NT-*-x86_64 ]]; then
  gn=buildtools/win/gn.exe
else
  # Fallback to system default.
  gn=$$(command -v gn)
fi

# Select ninja tool for the current platform.
if [[ $${PLATFORM} == "Darwin-x86_64" ]]; then
  ninja=third_party/depot_tools/ninja-mac
elif [[ $${PLATFORM} == "Linux-x86_64" ]]; then
  ninja=third_party/depot_tools/ninja-linux64
elif [[ $${PLATFORM} == MSYS_NT-*-x86_64 ]]; then
  ninja=third_party/depot_tools/ninja.exe
else
  # Fallback to system default.
  ninja=$$(command -v ninja)
fi

# Build wee8.
"$$gn" gen out/wee8 --args="$$WEE8_BUILD_ARGS"
"$$ninja" -C out/wee8 wee8

# Move compiled library to the expected destinations.
popd
mv $$ROOT/wee8/out/wee8/obj/libwee8.a $(execpath libwee8.a)