100 lines
3.5 KiB
CMake
100 lines
3.5 KiB
CMake
#[=======================================================================[.rst:
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python_callouts.cmake
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---------------------
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This file contains functions which which rely on calling Python
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* Generate Trimmed API
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* Generate File List
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* Generate Bindings
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]=======================================================================]
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#[[ Generate Trimmed API
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The build_profile.py has a __main__ and is used as a tool
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Its usage is listed as:
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$ python build_profile.py BUILD_PROFILE INPUT_JSON [OUTPUT_JSON]
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]]
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function( build_profile_generate_trimmed_api BUILD_PROFILE INPUT_JSON OUTPUT_JSON )
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execute_process(
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COMMAND "${Python3_EXECUTABLE}" "build_profile.py" "${BUILD_PROFILE}" "${INPUT_JSON}" "${OUTPUT_JSON}"
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WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
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)
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endfunction( )
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#[[ Generate File List
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Use the binding_generator.py Python script to determine the list of files that
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will be passed to the code generator using extension_api.json.
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NOTE: This happens for every configure.]]
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function( binding_generator_get_file_list OUT_VAR_NAME API_FILEPATH OUTPUT_DIR )
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# This code snippet will be squashed into a single line
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# The two strings make this a list, in CMake lists are semicolon delimited strings.
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set( PYTHON_SCRIPT
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"from binding_generator import print_file_list"
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"print_file_list( api_filepath='${API_FILEPATH}',
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output_dir='${OUTPUT_DIR}',
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headers=True,
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sources=True)")
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message( DEBUG "Python:\n${PYTHON_SCRIPT}" )
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# Strip newlines and whitespace to make it a one-liner.
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string( REGEX REPLACE "\n *" " " PYTHON_SCRIPT "${PYTHON_SCRIPT}" )
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execute_process( COMMAND "${Python3_EXECUTABLE}" "-c" "${PYTHON_SCRIPT}"
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WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
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OUTPUT_VARIABLE GENERATED_FILES_LIST
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OUTPUT_STRIP_TRAILING_WHITESPACE
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)
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# Debug output
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message( DEBUG "FileList-Begin" )
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foreach( PATH ${GENERATED_FILES_LIST} )
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message( DEBUG ${PATH} )
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endforeach()
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# Error out if the file list generator returned no files.
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list( LENGTH GENERATED_FILES_LIST LIST_LENGTH )
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if( NOT LIST_LENGTH GREATER 0 )
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message( FATAL_ERROR "File List Generation Failed")
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endif()
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message( STATUS "There are ${LIST_LENGTH} Files to generate" )
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set( ${OUT_VAR_NAME} ${GENERATED_FILES_LIST} PARENT_SCOPE )
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endfunction( )
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#[[ Generate Bindings
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Using the generated file list, use the binding_generator.py to generate the
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godot-cpp bindings. This will run at build time only if there are files
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missing. ]]
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function( binding_generator_generate_bindings API_FILE USE_TEMPLATE_GET_NODE, BITS, PRECISION, OUTPUT_DIR )
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# This code snippet will be squashed into a single line
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set( PYTHON_SCRIPT
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"from binding_generator import generate_bindings"
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"generate_bindings(
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api_filepath='${API_FILE}',
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use_template_get_node='${USE_TEMPLATE_GET_NODE}',
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bits='${BITS}',
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precision='${PRECISION}',
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output_dir='${OUTPUT_DIR}')")
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message( DEBUG "Python:\n${PYTHON_SCRIPT}" )
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# Strip newlines and whitespace to make it a one-liner.
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string( REGEX REPLACE "\n *" " " PYTHON_SCRIPT "${PYTHON_SCRIPT}" )
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add_custom_command(OUTPUT ${GENERATED_FILES_LIST}
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COMMAND "${Python3_EXECUTABLE}" "-c" "${PYTHON_SCRIPT}"
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VERBATIM
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WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
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MAIN_DEPENDENCY ${GODOT_GDEXTENSION_API_FILE}
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DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/binding_generator.py
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COMMENT "Generating bindings"
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)
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endfunction( )
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