run.sh

#!/bin/bash

SCRIPT_DIR="$(dirname "$BASH_SOURCE")"
cd "$SCRIPT_DIR/.."

. _detail/set_env_vars.sh

./python/clean.sh

mkdir -p python/output/tmp

# Those are the Clang-style flags for the parser.
EXTRA_PARSER_CXX_FLAGS=(
    -std=c++20 -Wall -Wextra -pedantic-errors
    -fparse-all-comments
)

# Those are optional tunable flags for the parser.
EXTRA_PARSER_FLAGS=(
)

# Those are optional tunable flags for the compilation.
EXTRA_CXX_FLAGS=(
    -DMB_PB11_STRIPPED_NAMESPACES='"Example"'
)


PYTHON_MODULE_EXT=.so

# Need extra flags on MSYS2.
if [[ $(uname -o) == Msys ]]; then
    EXTRA_PARSER_CXX_FLAGS+=(--sysroot="$MSYSTEM_PREFIX")
    EXTRA_CXX_FLAGS+=($(python3-config --libs))
    PYTHON_MODULE_EXT=.pyd
fi

set -x

# Assemble the combined input header.
echo "#pragma once" >python/output/tmp/combined_input.h
find input \( -name '*.h' -or -name '*.hpp' \) -printf "#include <%p>\n" >>python/output/tmp/combined_input.h

# Parse the input header.
../build/mrbind \
    python/output/tmp/combined_input.h \
    --format=macros \
    -o python/output/tmp/generated.cpp \
    --ignore :: \
    --allow Example \
    "${EXTRA_PARSER_FLAGS[@]}" \
    -- \
    -xc++-header \
    -resource-dir="${CLANG_RESOURCE_DIR:-$("$CLANG_CXX" -print-resource-dir)}" \
    -I. \
    "${EXTRA_PARSER_CXX_FLAGS[@]}"

# Clone Pybind, if it doesn't already exist.
if [[ ! -d python/pybind11 ]]; then
    git clone https://github.com/pybind/pybind11 python/pybind11

    # This is an arbitrary commit that's known to work.
    (cd python/pybind11 && git checkout d2413f5bca91a2c091b9b0801e0c1b5bf089e31d)
fi

PYTHON=${PYTHON:-python3}

# Compile the Python module.
# Note that the output filename must match the name passed to `-DMB_PB11_MODULE_NAME=`, minus the extension.
"$CLANG_CXX" \
    python/output/tmp/generated.cpp \
    -shared -fPIC \
    -o python/output/example$PYTHON_MODULE_EXT \
    -std=c++20 \
    -Wall -Wextra -pedantic-errors \
    -I../include \
    -Ipython/pybind11/include \
    -I. \
    -DMRBIND_HEADER='<mrbind/targets/pybind11.h>' \
    -DMB_PB11_MODULE_NAME=example \
    -DMB_DEFINE_IMPLEMENTATION \
    -DPYBIND11_COMPILER_TYPE='"_mrbind_example"' -DPYBIND11_BUILD_ABI='"_mrbind_example"' \
    $(${PYTHON}-config --cflags --embed) \
    "${EXTRA_CXX_FLAGS[@]}"

# Run a test program using the Python module.
PYTHONPATH=python/output $PYTHON python/example_consumer.py