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327 lines
10 KiB
327 lines
10 KiB
# Copyright 2020 The Pigweed Authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may not
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# use this file except in compliance with the License. You may obtain a copy of
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# the License at
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#
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# https://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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations under
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# the License.
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include_guard(GLOBAL)
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# Wrapper around cmake_parse_arguments that fails with an error if any arguments
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# remained unparsed.
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macro(_pw_parse_argv_strict function start_arg options one multi)
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cmake_parse_arguments(PARSE_ARGV
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"${start_arg}" arg "${options}" "${one}" "${multi}"
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)
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if(NOT "${arg_UNPARSED_ARGUMENTS}" STREQUAL "")
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set(_all_args ${options} ${one} ${multi})
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message(FATAL_ERROR
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"Unexpected arguments to ${function}: ${arg_UNPARSED_ARGUMENTS}\n"
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"Valid arguments: ${_all_args}"
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)
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endif()
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endmacro()
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# Automatically creates a library and test targets for the files in a module.
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# This function is only suitable for simple modules that meet the following
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# requirements:
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#
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# - The module exposes exactly one library.
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# - All source files in the module directory are included in the library.
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# - Each test in the module has
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# - exactly one source .cc file,
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# - optionally, one .c source with the same base name as the .cc file,
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# - only a dependency on the main module library.
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# - The module is not a facade.
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#
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# Modules that do not meet these requirements may not use
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# pw_auto_add_simple_module. Instead, define the module's libraries and tests
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# with pw_add_module_library, pw_add_facade, pw_add_test, and the standard CMake
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# functions, such as add_library, target_link_libraries, etc.
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#
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# This function does the following:
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#
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# 1. Find all .c and .cc files in the module's root directory.
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# 2. Create a library with the module name using pw_add_module_library with
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# all source files that do not end with _test.cc.
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# 3. Declare a test for each source file that ends with _test.cc.
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#
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# Args:
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#
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# IMPLEMENTS_FACADE - this module implements the specified facade
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# PUBLIC_DEPS - public target_link_libraries arguments
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# PRIVATE_DEPS - private target_link_libraries arguments
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#
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function(pw_auto_add_simple_module MODULE)
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_pw_parse_argv_strict(pw_auto_add_simple_module 1
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""
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"IMPLEMENTS_FACADE"
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"PUBLIC_DEPS;PRIVATE_DEPS;TEST_DEPS"
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)
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file(GLOB all_sources *.cc *.c)
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# Create a library with all source files not ending in _test.
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set(sources "${all_sources}")
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list(FILTER sources EXCLUDE REGEX "_test(\\.cc|(_c)?\\.c)$")
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list(FILTER sources EXCLUDE REGEX "_fuzzer\\.cc$")
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file(GLOB_RECURSE headers *.h)
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if(arg_IMPLEMENTS_FACADE)
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set(groups backends)
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else()
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set(groups modules "${MODULE}")
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endif()
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pw_add_module_library("${MODULE}"
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IMPLEMENTS_FACADES
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${arg_IMPLEMENTS_FACADE}
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PUBLIC_DEPS
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${arg_PUBLIC_DEPS}
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PRIVATE_DEPS
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${arg_PRIVATE_DEPS}
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SOURCES
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${sources}
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HEADERS
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${headers}
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)
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if(arg_IMPLEMENTS_FACADE)
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target_include_directories("${MODULE}" PUBLIC public_overrides)
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endif()
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pw_auto_add_module_tests("${MODULE}"
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PRIVATE_DEPS
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${arg_PUBLIC_DEPS}
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${arg_PRIVATE_DEPS}
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${arg_TEST_DEPS}
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GROUPS
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${groups}
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)
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endfunction(pw_auto_add_simple_module)
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# Creates a test for each source file ending in _test. Tests with mutliple .cc
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# files or different dependencies than the module will not work correctly.
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#
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# Args:
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#
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# PRIVATE_DEPS - dependencies to apply to all tests
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# GROUPS - groups in addition to MODULE to which to add these tests
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#
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function(pw_auto_add_module_tests MODULE)
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_pw_parse_argv_strict(pw_auto_add_module_tests 1
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""
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""
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"PRIVATE_DEPS;GROUPS"
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)
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file(GLOB cc_tests *_test.cc)
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foreach(test IN LISTS cc_tests)
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get_filename_component(test_name "${test}" NAME_WE)
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# Find a .c test corresponding with the test .cc file, if any.
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file(GLOB c_test "${test_name}.c" "${test_name}_c.c")
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pw_add_test("${MODULE}.${test_name}"
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SOURCES
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"${test}"
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${c_test}
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DEPS
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"$<TARGET_NAME_IF_EXISTS:${MODULE}>"
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${arg_PRIVATE_DEPS}
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GROUPS
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"${MODULE}"
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${arg_GROUPS}
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)
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endforeach()
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endfunction(pw_auto_add_module_tests)
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# Sets the provided variable to the common library arguments.
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macro(_pw_library_args variable)
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set("${variable}" SOURCES HEADERS PUBLIC_DEPS PRIVATE_DEPS ${ARGN})
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endmacro()
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# Creates a library in a module. The library has access to the public/ include
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# directory.
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#
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# Args:
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#
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# SOURCES - source files for this library
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# HEADERS - header files for this library
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# PUBLIC_DEPS - public target_link_libraries arguments
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# PRIVATE_DEPS - private target_link_libraries arguments
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# IMPLEMENTS_FACADES - which facades this library implements
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#
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function(pw_add_module_library NAME)
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_pw_library_args(list_args IMPLEMENTS_FACADES)
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_pw_parse_argv_strict(pw_add_module_library 1 "" "" "${list_args}")
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# Check that the library's name is prefixed by the module name.
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get_filename_component(module "${CMAKE_CURRENT_SOURCE_DIR}" NAME)
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if(NOT "${NAME}" MATCHES "${module}(\\.[^\\.]+)?(\\.facade)?$")
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message(FATAL_ERROR
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"Module libraries must match the module name or be in the form "
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"'MODULE_NAME.LIBRARY_NAME'. The library '${NAME}' does not match."
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)
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endif()
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add_library("${NAME}" EXCLUDE_FROM_ALL ${arg_HEADERS} ${arg_SOURCES})
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target_include_directories("${NAME}" PUBLIC public)
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target_link_libraries("${NAME}"
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PUBLIC
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pw_build
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${arg_PUBLIC_DEPS}
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PRIVATE
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pw_build.strict_warnings
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pw_build.extra_strict_warnings
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${arg_PRIVATE_DEPS}
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)
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if(NOT "${arg_IMPLEMENTS_FACADES}" STREQUAL "")
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target_include_directories("${NAME}" PUBLIC public_overrides)
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set(facades ${arg_IMPLEMENTS_FACADES})
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list(TRANSFORM facades APPEND ".facade")
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target_link_libraries("${NAME}" PUBLIC ${facades})
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endif()
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# Libraries require at least one source file.
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if(NOT arg_SOURCES)
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target_sources("${NAME}" PRIVATE $<TARGET_PROPERTY:pw_build.empty,SOURCES>)
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endif()
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endfunction(pw_add_module_library)
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# Declares a module as a facade.
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#
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# Facades are declared as two libraries to avoid circular dependencies.
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# Libraries that use the facade depend on a library named for the module. The
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# module that implements the facade depends on a library named
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# MODULE_NAME.facade.
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#
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# pw_add_facade accepts the same arguments as pw_add_module_library, except for
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# IMPLEMENTS_FACADES. It also accepts the following argument:
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#
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# DEFAULT_BACKEND - which backend to use by default
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#
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function(pw_add_facade NAME)
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_pw_library_args(list_args)
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_pw_parse_argv_strict(pw_add_facade 1 "" "DEFAULT_BACKEND" "${list_args}")
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# If no backend is set, a script that displays an error message is used
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# instead. If the facade is used in the build, it fails with this error.
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add_custom_target("${NAME}._no_backend_set_message"
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COMMAND
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python "$ENV{PW_ROOT}/pw_build/py/pw_build/null_backend.py" "${NAME}"
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)
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add_library("${NAME}.NO_BACKEND_SET" INTERFACE)
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add_dependencies("${NAME}.NO_BACKEND_SET" "${NAME}._no_backend_set_message")
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# Set the default backend to the error message if no default is specified.
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if("${arg_DEFAULT_BACKEND}" STREQUAL "")
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set(arg_DEFAULT_BACKEND "${NAME}.NO_BACKEND_SET")
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endif()
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# Declare the backend variable for this facade.
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set("${NAME}_BACKEND" "${arg_DEFAULT_BACKEND}" CACHE STRING
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"Backend for ${NAME}")
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# Define the facade library, which is used by the backend to avoid circular
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# dependencies.
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add_library("${NAME}.facade" INTERFACE)
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target_include_directories("${NAME}.facade" INTERFACE public)
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target_link_libraries("${NAME}.facade" INTERFACE ${arg_PUBLIC_DEPS})
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# Define the public-facing library for this facade, which depends on the
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# header files in .facade target and exposes the dependency on the backend.
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pw_add_module_library("${NAME}"
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SOURCES
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${arg_SOURCES}
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HEADERS
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${arg_HEADERS}
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PUBLIC_DEPS
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"${NAME}.facade"
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"${${NAME}_BACKEND}"
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)
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endfunction(pw_add_facade)
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# Sets which backend to use for the given facade.
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function(pw_set_backend FACADE BACKEND)
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set("${FACADE}_BACKEND" "${BACKEND}" CACHE STRING "Backend for ${NAME}" FORCE)
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endfunction(pw_set_backend)
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# Declares a unit test. Creates two targets:
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#
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# * <TEST_NAME> - the test executable
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# * <TEST_NAME>.run - builds and runs the test
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#
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# Args:
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#
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# NAME: name to use for the target
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# SOURCES: source files for this test
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# DEPS: libraries on which this test depends
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# GROUPS: groups to which to add this test; if none are specified, the test is
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# added to the 'default' and 'all' groups
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#
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function(pw_add_test NAME)
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_pw_parse_argv_strict(pw_add_test 1 "" "" "SOURCES;DEPS;GROUPS")
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add_executable("${NAME}" EXCLUDE_FROM_ALL ${arg_SOURCES})
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target_link_libraries("${NAME}"
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PRIVATE
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pw_unit_test
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pw_unit_test.main
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${arg_DEPS}
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)
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# Define a target for running the test. The target creates a stamp file to
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# indicate successful test completion. This allows running tests in parallel
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# with Ninja's full dependency resolution.
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add_custom_command(
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COMMAND
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# TODO(hepler): This only runs local test binaries. Execute a test runner
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# instead to support device test runs.
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"$<TARGET_FILE:${NAME}>"
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COMMAND
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"${CMAKE_COMMAND}" -E touch "${NAME}.stamp"
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DEPENDS
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"${NAME}"
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OUTPUT
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"${NAME}.stamp"
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)
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add_custom_target("${NAME}.run" DEPENDS "${NAME}.stamp")
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# Always add tests to the "all" group. If no groups are provided, add the
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# test to the "default" group.
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if(arg_GROUPS)
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set(groups all ${arg_GROUPS})
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else()
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set(groups all default)
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endif()
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list(REMOVE_DUPLICATES groups)
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pw_add_test_to_groups("${NAME}" ${groups})
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endfunction(pw_add_test)
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# Adds a test target to the specified test groups. Test groups can be built with
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# the pw_tests_GROUP_NAME target or executed with the pw_run_tests_GROUP_NAME
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# target.
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function(pw_add_test_to_groups TEST_NAME)
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foreach(group IN LISTS ARGN)
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if(NOT TARGET "pw_tests.${group}")
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add_custom_target("pw_tests.${group}")
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add_custom_target("pw_run_tests.${group}")
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endif()
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add_dependencies("pw_tests.${group}" "${TEST_NAME}")
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add_dependencies("pw_run_tests.${group}" "${TEST_NAME}.run")
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endforeach()
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endfunction(pw_add_test_to_groups)
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