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# Copyright 2020 The Dawn & Tint Authors
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
find_package(PythonInterp REQUIRED)
message(STATUS "Dawn: using python at ${PYTHON_EXECUTABLE}")
# Check for Jinja2
if (NOT DAWN_JINJA2_DIR)
message(STATUS "Dawn: Using system jinja2")
execute_process(
COMMAND ${PYTHON_EXECUTABLE} -c "import jinja2"
RESULT_VARIABLE RET
)
if (NOT RET EQUAL 0)
message(FATAL_ERROR "Dawn: Missing dependencies for code generation, please ensure you have python-jinja2 installed.")
endif()
else()
message(STATUS "Dawn: using jinja2 at ${DAWN_JINJA2_DIR}")
message(STATUS "Dawn: using markupsafe at ${DAWN_MARKUPSAFE_DIR}")
endif()
# Function to invoke a generator_lib.py generator.
# - SCRIPT is the name of the script to call
# - ARGS are the extra arguments to pass to the script in addition to the base generator_lib.py arguments
# - PRINT_NAME is the name to use when outputting status or errors
# - RESULT_VARIABLE will be modified to contain the list of files generated by this generator
function(DawnGenerator)
set(oneValueArgs SCRIPT RESULT_VARIABLE PRINT_NAME)
set(multiValueArgs ARGS)
cmake_parse_arguments(G "" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
# Build the set of args common to all invocation of that generator.
set(BASE_ARGS
${PYTHON_EXECUTABLE}
${G_SCRIPT}
--template-dir
"${DAWN_TEMPLATE_DIR}"
--root-dir
"${Dawn_SOURCE_DIR}"
--output-dir
"${DAWN_BUILD_GEN_DIR}"
${G_ARGS}
)
if (DAWN_JINJA2_DIR)
list(APPEND BASE_ARGS --jinja2-path ${DAWN_JINJA2_DIR})
endif()
if (DAWN_MARKUPSAFE_DIR)
list(APPEND BASE_ARGS --markupsafe-path ${DAWN_MARKUPSAFE_DIR})
endif()
# Call the generator to get the list of its dependencies.
execute_process(
COMMAND ${BASE_ARGS} --print-cmake-dependencies
OUTPUT_VARIABLE DEPENDENCIES
RESULT_VARIABLE RET
)
if (NOT RET EQUAL 0)
message(FATAL_ERROR "Dawn: Failed to get the dependencies for ${G_PRINT_NAME}. Base args are '${BASE_ARGS}'.")
endif()
# Ask CMake to re-run if any of the dependencies changed as it might modify the build graph.
if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.12.0")
set_property(DIRECTORY APPEND PROPERTY CMAKE_CONFIGURE_DEPENDS ${DEPENDENCIES})
endif()
# Call the generator to get the list of its outputs.
execute_process(
COMMAND ${BASE_ARGS} --print-cmake-outputs
OUTPUT_VARIABLE OUTPUTS
RESULT_VARIABLE RET
)
if (NOT RET EQUAL 0)
message(FATAL_ERROR "Dawn: Failed to get the outputs for ${G_PRINT_NAME}. Base args are '${BASE_ARGS}'.")
endif()
# Add the custom command that calls the generator.
add_custom_command(
COMMAND ${BASE_ARGS}
DEPENDS ${DEPENDENCIES}
OUTPUT ${OUTPUTS}
COMMENT "Dawn: Generating files for ${G_PRINT_NAME}."
)
set_source_files_properties(${OUTPUTS} PROPERTIES GENERATED TRUE)
# Return the list of outputs.
set(${G_RESULT_VARIABLE} ${OUTPUTS} PARENT_SCOPE)
endfunction()
# Helper function to call dawn_generator.py:
# - TARGET is the generator target to build
# - PRINT_NAME and RESULT_VARIABLE are like for DawnGenerator
function(DawnJSONGenerator)
set(oneValueArgs TARGET RESULT_VARIABLE)
cmake_parse_arguments(G "" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
DawnGenerator(
SCRIPT "${Dawn_SOURCE_DIR}/generator/dawn_json_generator.py"
ARGS --dawn-json
"${Dawn_SOURCE_DIR}/dawn.json"
--wire-json
"${Dawn_SOURCE_DIR}/dawn_wire.json"
--targets
${G_TARGET}
RESULT_VARIABLE RET
${G_UNPARSED_ARGUMENTS}
)
# Forward the result up one more scope
set(${G_RESULT_VARIABLE} ${RET} PARENT_SCOPE)
endfunction()
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