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Add initial CMakeLists.txt files
Adds CMake support for: - Generating the Dawn headers and C++ wrappers - libdawn_wire - libdawn_native with the Metal backend for now - All the examples. Bug: dawn:333 Change-Id: I6ffbe090b0bd21d6a805c03a507ad51fda0275ca Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/15720 Commit-Queue: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
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116
generator/CMakeLists.txt
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116
generator/CMakeLists.txt
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# Copyright 2020 The Dawn Authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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find_package(PythonInterp REQUIRED)
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message(STATUS "Dawn: using python at ${PYTHON_EXECUTABLE}")
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# Check for Jinja2
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if (NOT DAWN_JINJA2_DIR)
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message(STATUS "Dawn: Using system jinja2")
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execute_process(
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COMMAND ${PYTHON_EXECUTABLE} -c "import jinja2"
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RESULT_VARIABLE RET
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)
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if (NOT RET EQUAL 0)
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message(FATAL_ERROR "Dawn: Missing dependencies for code generation, please ensure you have python-jinja2 installed.")
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endif()
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else()
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message(STATUS "Dawn: Using jinja2 at ${DAWN_JINJA2_DIR}")
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endif()
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# Function to invoke a generator_lib.py generator.
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# - SCRIPT is the name of the script to call
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# - ARGS are the extra arguments to pass to the script in addition to the base generator_lib.py arguments
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# - PRINT_NAME is the name to use when outputting status or errors
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# - RESULT_VARIABLE will be modified to contain the list of files generated by this generator
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function(DawnGenerator)
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set(oneValueArgs SCRIPT RESULT_VARIABLE PRINT_NAME)
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set(multiValueArgs ARGS)
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cmake_parse_arguments(G "" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
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# Build the set of args common to all invocation of that generator.
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set(BASE_ARGS
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${PYTHON_EXECUTABLE}
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${G_SCRIPT}
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--template-dir
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"${DAWN_TEMPLATE_DIR}"
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--root-dir
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"${Dawn_SOURCE_DIR}"
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--output-dir
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"${DAWN_BUILD_GEN_DIR}"
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${G_ARGS}
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)
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if (DAWN_JINJA2_DIR)
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list(APPEND BASE_ARGS --jinja2-path ${DAWN_JINJA2_DIR})
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endif()
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# Call the generator to get the list of its dependencies.
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execute_process(
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COMMAND ${BASE_ARGS} --print-cmake-dependencies
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OUTPUT_VARIABLE DEPENDENCIES
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RESULT_VARIABLE RET
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)
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if (NOT RET EQUAL 0)
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message(FATAL_ERROR "Dawn: Failed to get the dependencies for ${G_PRINT_NAME}.")
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endif()
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# Ask CMake to re-run if any of the dependencies changed as it might modify the build graph.
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if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.12.0")
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set_property(DIRECTORY APPEND PROPERTY CMAKE_CONFIGURE_DEPENDS ${DEPENDENCIES})
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endif()
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# Call the generator to get the list of its outputs.
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execute_process(
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COMMAND ${BASE_ARGS} --print-cmake-outputs
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OUTPUT_VARIABLE OUTPUTS
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RESULT_VARIABLE RET
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)
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if (NOT RET EQUAL 0)
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message(FATAL_ERROR "Dawn: Failed to get the outputs for ${G_PRINT_NAME}.")
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endif()
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# Add the custom command that calls the generator.
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add_custom_command(
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COMMAND ${BASE_ARGS}
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DEPENDS ${DEPENDENCIES}
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OUTPUT ${OUTPUTS}
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COMMENT "Dawn: Generating files for ${G_PRINT_NAME}."
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)
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# Return the list of outputs.
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set(${G_RESULT_VARIABLE} ${OUTPUTS} PARENT_SCOPE)
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endfunction()
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# Helper function to call dawn_generator.py:
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# - TARGET is the generator target to build
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# - PRINT_NAME and RESULT_VARIABLE are like for DawnGenerator
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function(DawnJSONGenerator)
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set(oneValueArgs TARGET RESULT_VARIABLE)
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cmake_parse_arguments(G "" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
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DawnGenerator(
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SCRIPT "${Dawn_SOURCE_DIR}/generator/dawn_json_generator.py"
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ARGS --dawn-json
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"${Dawn_SOURCE_DIR}/dawn.json"
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--wire-json
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"${Dawn_SOURCE_DIR}/dawn_wire.json"
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--targets
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${G_TARGET}
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RESULT_VARIABLE RET
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${G_UNPARSED_ARGUMENTS}
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)
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# Forward the result up one more scope
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set(${G_RESULT_VARIABLE} ${RET} PARENT_SCOPE)
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endfunction()
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@@ -206,22 +206,39 @@ def _compute_python_dependencies(root_dir = None):
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def run_generator(generator):
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parser = argparse.ArgumentParser(
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description = generator.get_description(),
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formatter_class = argparse.ArgumentDefaultsHelpFormatter
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formatter_class = argparse.ArgumentDefaultsHelpFormatter,
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)
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generator.add_commandline_arguments(parser);
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parser.add_argument('-t', '--template-dir', default='templates', type=str, help='Directory with template files.')
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parser.add_argument('--template-dir', default='templates', type=str, help='Directory with template files.')
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parser.add_argument(kJinja2Path, default=None, type=str, help='Additional python path to set before loading Jinja2')
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parser.add_argument('--output-json-tarball', default=None, type=str, help='Name of the "JSON tarball" to create (tar is too annoying to use in python).')
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parser.add_argument('--depfile', default=None, type=str, help='Name of the Ninja depfile to create for the JSON tarball')
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parser.add_argument('--expected-outputs-file', default=None, type=str, help="File to compare outputs with and fail if it doesn't match")
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parser.add_argument('--root-dir', default=None, type=str, help='Optional source root directory for Python dependency computations')
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parser.add_argument('--allowed-output-dirs-file', default=None, type=str, help="File containing a list of allowed directories where files can be output.")
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parser.add_argument('--print-cmake-dependencies', default=False, action="store_true", help="Prints a semi-colon separated list of dependencies to stdout and exits.")
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parser.add_argument('--print-cmake-outputs', default=False, action="store_true", help="Prints a semi-colon separated list of outputs to stdout and exits.")
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parser.add_argument('--output-dir', default=None, type=str, help='Directory where to output generate files.')
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args = parser.parse_args()
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renders = generator.get_file_renders(args);
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# Output a list of all dependencies for CMake or the tarball for GN/Ninja.
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if args.depfile != None or args.print_cmake_dependencies:
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dependencies = generator.get_dependencies(args)
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dependencies += [args.template_dir + os.path.sep + render.template for render in renders]
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dependencies += _compute_python_dependencies(args.root_dir)
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if args.depfile != None:
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with open(args.depfile, 'w') as f:
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f.write(args.output_json_tarball + ": " + " ".join(dependencies))
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if args.print_cmake_dependencies:
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sys.stdout.write(";".join(dependencies))
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return 0
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# The caller wants to assert that the outputs are what it expects.
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# Load the file and compare with our renders.
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if args.expected_outputs_file != None:
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@@ -235,6 +252,11 @@ def run_generator(generator):
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print("Actual output:\n " + repr(sorted(actual)))
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return 1
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# Print the list of all the outputs for cmake.
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if args.print_cmake_outputs:
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sys.stdout.write(";".join([os.path.join(args.output_dir, render.output) for render in renders]))
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return 0
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outputs = _do_renders(renders, args.template_dir)
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# The caller wants to assert that the outputs are only in specific directories.
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@@ -257,7 +279,7 @@ def run_generator(generator):
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print(' "{}"'.format(directory))
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return 1
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# Output the tarball and its depfile
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# Output the JSON tarball
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if args.output_json_tarball != None:
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json_root = {}
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for output in outputs:
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@@ -266,11 +288,14 @@ def run_generator(generator):
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with open(args.output_json_tarball, 'w') as f:
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f.write(json.dumps(json_root))
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# Output a list of all dependencies for the tarball for Ninja.
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if args.depfile != None:
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dependencies = generator.get_dependencies(args)
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dependencies += [args.template_dir + os.path.sep + render.template for render in renders]
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dependencies += _compute_python_dependencies(args.root_dir)
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# Output the files directly.
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if args.output_dir != None:
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for output in outputs:
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output_path = os.path.join(args.output_dir, output.name)
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with open(args.depfile, 'w') as f:
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f.write(args.output_json_tarball + ": " + " ".join(dependencies))
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directory = os.path.dirname(output_path)
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if not os.path.exists(directory):
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os.makedirs(directory)
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with open(output_path, 'w') as outfile:
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outfile.write(output.content)
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