| #!/usr/bin/env fuchsia-vendored-python |
| # |
| # Copyright 2016 Google Inc. |
| # |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| |
| """ |
| Usage: gn_to_cmake.py <json_file_name> |
| |
| gn gen out/config --ide=json --json-ide-script=../../gn/gn_to_cmake.py |
| |
| or |
| |
| gn gen out/config --ide=json |
| python gn/gn_to_cmake.py out/config/project.json |
| |
| The first is recommended, as it will auto-update. |
| """ |
| |
| |
| import itertools |
| import functools |
| import json |
| import posixpath |
| import os |
| import string |
| import sys |
| |
| |
| def CMakeStringEscape(a): |
| """Escapes the string 'a' for use inside a CMake string. |
| |
| This means escaping |
| '\' otherwise it may be seen as modifying the next character |
| '"' otherwise it will end the string |
| ';' otherwise the string becomes a list |
| |
| The following do not need to be escaped |
| '#' when the lexer is in string state, this does not start a comment |
| """ |
| return a.replace("\\", "\\\\").replace(";", "\\;").replace('"', '\\"') |
| |
| |
| def CMakeTargetEscape(a): |
| """Escapes the string 'a' for use as a CMake target name. |
| |
| CMP0037 in CMake 3.0 restricts target names to "^[A-Za-z0-9_.:+-]+$" |
| The ':' is only allowed for imported targets. |
| """ |
| |
| def Escape(c): |
| if c in string.ascii_letters or c in string.digits or c in "_.+-": |
| return c |
| else: |
| return "__" |
| |
| return "".join(map(Escape, a)) |
| |
| |
| def SetVariable(out, variable_name, value): |
| """Sets a CMake variable.""" |
| out.write('set("') |
| out.write(CMakeStringEscape(variable_name)) |
| out.write('" "') |
| out.write(CMakeStringEscape(value)) |
| out.write('")\n') |
| |
| |
| def SetVariableList(out, variable_name, values): |
| """Sets a CMake variable to a list.""" |
| if not values: |
| return SetVariable(out, variable_name, "") |
| if len(values) == 1: |
| return SetVariable(out, variable_name, values[0]) |
| out.write('list(APPEND "') |
| out.write(CMakeStringEscape(variable_name)) |
| out.write('"\n "') |
| out.write('"\n "'.join([CMakeStringEscape(value) for value in values])) |
| out.write('")\n') |
| |
| |
| def SetFilesProperty(output, variable, property_name, values, sep): |
| """Given a set of source files, sets the given property on them.""" |
| output.write("set_source_files_properties(") |
| WriteVariable(output, variable) |
| output.write(" PROPERTIES ") |
| output.write(property_name) |
| output.write(' "') |
| for value in values: |
| output.write(CMakeStringEscape(value)) |
| output.write(sep) |
| output.write('")\n') |
| |
| |
| def SetCurrentTargetProperty(out, property_name, values, sep=""): |
| """Given a target, sets the given property.""" |
| out.write('set_target_properties("${target}" PROPERTIES ') |
| out.write(property_name) |
| out.write(' "') |
| for value in values: |
| out.write(CMakeStringEscape(value)) |
| out.write(sep) |
| out.write('")\n') |
| |
| |
| def WriteVariable(output, variable_name, prepend=None): |
| if prepend: |
| output.write(prepend) |
| output.write("${") |
| output.write(variable_name) |
| output.write("}") |
| |
| |
| # See GetSourceFileType in gn |
| source_file_types = { |
| ".cc": "cxx", |
| ".cpp": "cxx", |
| ".cxx": "cxx", |
| ".c": "c", |
| ".s": "asm", |
| ".S": "asm", |
| ".asm": "asm", |
| ".o": "obj", |
| ".obj": "obj", |
| } |
| |
| |
| class CMakeTargetType(object): |
| def __init__(self, command, modifier, property_modifier, is_linkable): |
| self.command = command |
| self.modifier = modifier |
| self.property_modifier = property_modifier |
| self.is_linkable = is_linkable |
| |
| |
| CMakeTargetType.custom = CMakeTargetType( |
| "add_custom_target", "SOURCES", None, False |
| ) |
| |
| # See GetStringForOutputType in gn |
| cmake_target_types = { |
| "unknown": CMakeTargetType.custom, |
| "group": CMakeTargetType.custom, |
| "executable": CMakeTargetType("add_executable", None, "RUNTIME", True), |
| "loadable_module": CMakeTargetType( |
| "add_library", "MODULE", "LIBRARY", True |
| ), |
| "shared_library": CMakeTargetType("add_library", "SHARED", "LIBRARY", True), |
| "static_library": CMakeTargetType( |
| "add_library", "STATIC", "ARCHIVE", False |
| ), |
| "source_set": CMakeTargetType("add_library", "OBJECT", None, False), |
| "copy": CMakeTargetType.custom, |
| "action": CMakeTargetType.custom, |
| "action_foreach": CMakeTargetType.custom, |
| "bundle_data": CMakeTargetType.custom, |
| "create_bundle": CMakeTargetType.custom, |
| } |
| |
| |
| def FindFirstOf(s, a): |
| return min(s.find(i) for i in a if i in s) |
| |
| |
| class Project(object): |
| def __init__(self, project_json): |
| self.targets = project_json["targets"] |
| build_settings = project_json["build_settings"] |
| self.root_path = build_settings["root_path"] |
| self.build_path = posixpath.join( |
| self.root_path, build_settings["build_dir"][2:] |
| ) |
| |
| def GetAbsolutePath(self, path): |
| if path.startswith("//"): |
| return self.root_path + "/" + path[2:] |
| else: |
| return path |
| |
| def GetObjectSourceDependencies(self, gn_target_name, object_dependencies): |
| """All OBJECT libraries whose sources have not been absorbed.""" |
| dependencies = self.targets[gn_target_name].get("deps", []) |
| for dependency in dependencies: |
| dependency_type = self.targets[dependency].get("type", None) |
| if dependency_type == "source_set": |
| object_dependencies.add(dependency) |
| if dependency_type not in gn_target_types_that_absorb_objects: |
| self.GetObjectSourceDependencies( |
| dependency, object_dependencies |
| ) |
| |
| def GetObjectLibraryDependencies(self, gn_target_name, object_dependencies): |
| """All OBJECT libraries whose libraries have not been absorbed.""" |
| dependencies = self.targets[gn_target_name].get("deps", []) |
| for dependency in dependencies: |
| dependency_type = self.targets[dependency].get("type", None) |
| if dependency_type == "source_set": |
| object_dependencies.add(dependency) |
| self.GetObjectLibraryDependencies( |
| dependency, object_dependencies |
| ) |
| |
| def GetCMakeTargetName(self, gn_target_name): |
| # See <chromium>/src/tools/gn/label.cc#Resolve |
| # //base/test:test_support(//build/toolchain/win:msvc) |
| path_separator = FindFirstOf(gn_target_name, (":", "(")) |
| location = None |
| name = None |
| toolchain = None |
| if not path_separator: |
| location = gn_target_name[2:] |
| else: |
| location = gn_target_name[2:path_separator] |
| toolchain_separator = gn_target_name.find("(", path_separator) |
| if toolchain_separator == -1: |
| name = gn_target_name[path_separator + 1 :] |
| else: |
| if toolchain_separator > path_separator: |
| name = gn_target_name[ |
| path_separator + 1 : toolchain_separator |
| ] |
| assert gn_target_name.endswith(")") |
| toolchain = gn_target_name[toolchain_separator + 1 : -1] |
| assert location or name |
| |
| cmake_target_name = None |
| if location.endswith("/" + name): |
| cmake_target_name = location |
| elif location: |
| cmake_target_name = location + "_" + name |
| else: |
| cmake_target_name = name |
| if toolchain: |
| cmake_target_name += "--" + toolchain |
| return CMakeTargetEscape(cmake_target_name) |
| |
| |
| class Target(object): |
| def __init__(self, gn_target_name, project): |
| self.gn_name = gn_target_name |
| self.properties = project.targets[self.gn_name] |
| self.cmake_name = project.GetCMakeTargetName(self.gn_name) |
| self.gn_type = self.properties.get("type", None) |
| self.cmake_type = cmake_target_types.get(self.gn_type, None) |
| |
| |
| def WriteAction(out, target, project, sources, synthetic_dependencies): |
| outputs = [] |
| output_directories = set() |
| for output in target.properties.get("outputs", []): |
| output_abs_path = project.GetAbsolutePath(output) |
| outputs.append(output_abs_path) |
| output_directory = posixpath.dirname(output_abs_path) |
| if output_directory: |
| output_directories.add(output_directory) |
| outputs_name = "${target}__output" |
| SetVariableList(out, outputs_name, outputs) |
| |
| out.write("add_custom_command(OUTPUT ") |
| WriteVariable(out, outputs_name) |
| out.write("\n") |
| |
| if output_directories: |
| out.write(' COMMAND ${CMAKE_COMMAND} -E make_directory "') |
| out.write('" "'.join(map(CMakeStringEscape, output_directories))) |
| out.write('"\n') |
| |
| script = target.properties["script"] |
| arguments = target.properties["args"] |
| out.write(' COMMAND python "') |
| out.write(CMakeStringEscape(project.GetAbsolutePath(script))) |
| out.write('"') |
| if arguments: |
| out.write('\n "') |
| out.write('"\n "'.join(map(CMakeStringEscape, arguments))) |
| out.write('"') |
| out.write("\n") |
| |
| out.write(" DEPENDS ") |
| for sources_type_name in sources.values(): |
| WriteVariable(out, sources_type_name, " ") |
| out.write("\n") |
| |
| # TODO: CMake 3.7 is introducing DEPFILE |
| |
| out.write(' WORKING_DIRECTORY "') |
| out.write(CMakeStringEscape(project.build_path)) |
| out.write('"\n') |
| |
| out.write(' COMMENT "Action: ${target}"\n') |
| |
| out.write(" VERBATIM)\n") |
| |
| synthetic_dependencies.add(outputs_name) |
| |
| |
| def ExpandPlaceholders(source, a): |
| source_dir, source_file_part = posixpath.split(source) |
| source_name_part, _ = posixpath.splitext(source_file_part) |
| # TODO: {{source_gen_dir}}, {{source_out_dir}}, {{response_file_name}} |
| return ( |
| a.replace("{{source}}", source) |
| .replace("{{source_file_part}}", source_file_part) |
| .replace("{{source_name_part}}", source_name_part) |
| .replace("{{source_dir}}", source_dir) |
| .replace("{{source_root_relative_dir}}", source_dir) |
| ) |
| |
| |
| def WriteActionForEach(out, target, project, sources, synthetic_dependencies): |
| all_outputs = target.properties.get("outputs", []) |
| inputs = target.properties.get("sources", []) |
| # TODO: consider expanding 'output_patterns' instead. |
| outputs_per_input = len(all_outputs) / len(inputs) |
| for count, source in enumerate(inputs): |
| source_abs_path = project.GetAbsolutePath(source) |
| |
| outputs = [] |
| output_directories = set() |
| for output in all_outputs[ |
| outputs_per_input * count : outputs_per_input * (count + 1) |
| ]: |
| output_abs_path = project.GetAbsolutePath(output) |
| outputs.append(output_abs_path) |
| output_directory = posixpath.dirname(output_abs_path) |
| if output_directory: |
| output_directories.add(output_directory) |
| outputs_name = "${target}__output_" + str(count) |
| SetVariableList(out, outputs_name, outputs) |
| |
| out.write("add_custom_command(OUTPUT ") |
| WriteVariable(out, outputs_name) |
| out.write("\n") |
| |
| if output_directories: |
| out.write(' COMMAND ${CMAKE_COMMAND} -E make_directory "') |
| out.write('" "'.join(map(CMakeStringEscape, output_directories))) |
| out.write('"\n') |
| |
| script = target.properties["script"] |
| # TODO: need to expand {{xxx}} in arguments |
| arguments = target.properties["args"] |
| out.write(' COMMAND python "') |
| out.write(CMakeStringEscape(project.GetAbsolutePath(script))) |
| out.write('"') |
| if arguments: |
| out.write('\n "') |
| expand = functools.partial(ExpandPlaceholders, source_abs_path) |
| out.write( |
| '"\n "'.join(map(CMakeStringEscape, map(expand, arguments))) |
| ) |
| out.write('"') |
| out.write("\n") |
| |
| out.write(" DEPENDS") |
| if "input" in sources: |
| WriteVariable(out, sources["input"], " ") |
| out.write(' "') |
| out.write(CMakeStringEscape(source_abs_path)) |
| out.write('"\n') |
| |
| # TODO: CMake 3.7 is introducing DEPFILE |
| |
| out.write(' WORKING_DIRECTORY "') |
| out.write(CMakeStringEscape(project.build_path)) |
| out.write('"\n') |
| |
| out.write(' COMMENT "Action ${target} on ') |
| out.write(CMakeStringEscape(source_abs_path)) |
| out.write('"\n') |
| |
| out.write(" VERBATIM)\n") |
| |
| synthetic_dependencies.add(outputs_name) |
| |
| |
| def WriteCopy(out, target, project, sources, synthetic_dependencies): |
| inputs = target.properties.get("sources", []) |
| raw_outputs = target.properties.get("outputs", []) |
| |
| # TODO: consider expanding 'output_patterns' instead. |
| outputs = [] |
| for output in raw_outputs: |
| output_abs_path = project.GetAbsolutePath(output) |
| outputs.append(output_abs_path) |
| outputs_name = "${target}__output" |
| SetVariableList(out, outputs_name, outputs) |
| |
| out.write("add_custom_command(OUTPUT ") |
| WriteVariable(out, outputs_name) |
| out.write("\n") |
| |
| for src, dst in zip(inputs, outputs): |
| out.write(' COMMAND ${CMAKE_COMMAND} -E copy "') |
| out.write(CMakeStringEscape(project.GetAbsolutePath(src))) |
| out.write('" "') |
| out.write(CMakeStringEscape(dst)) |
| out.write('"\n') |
| |
| out.write(" DEPENDS ") |
| for sources_type_name in sources.values(): |
| WriteVariable(out, sources_type_name, " ") |
| out.write("\n") |
| |
| out.write(' WORKING_DIRECTORY "') |
| out.write(CMakeStringEscape(project.build_path)) |
| out.write('"\n') |
| |
| out.write(' COMMENT "Copy ${target}"\n') |
| |
| out.write(" VERBATIM)\n") |
| |
| synthetic_dependencies.add(outputs_name) |
| |
| |
| def WriteCompilerFlags(out, target, project, sources): |
| # Hack, set linker language to c if no c or cxx files present. |
| if not "c" in sources and not "cxx" in sources: |
| SetCurrentTargetProperty(out, "LINKER_LANGUAGE", ["C"]) |
| |
| # Mark uncompiled sources as uncompiled. |
| if "input" in sources: |
| SetFilesProperty( |
| out, sources["input"], "HEADER_FILE_ONLY", ("True",), "" |
| ) |
| if "other" in sources: |
| SetFilesProperty( |
| out, sources["other"], "HEADER_FILE_ONLY", ("True",), "" |
| ) |
| |
| # Mark object sources as linkable. |
| if "obj" in sources: |
| SetFilesProperty(out, sources["obj"], "EXTERNAL_OBJECT", ("True",), "") |
| |
| # TODO: 'output_name', 'output_dir', 'output_extension' |
| # This includes using 'source_outputs' to direct compiler output. |
| |
| # Includes |
| includes = target.properties.get("include_dirs", []) |
| if includes: |
| out.write('set_property(TARGET "${target}" ') |
| out.write("APPEND PROPERTY INCLUDE_DIRECTORIES") |
| for include_dir in includes: |
| out.write('\n "') |
| out.write(project.GetAbsolutePath(include_dir)) |
| out.write('"') |
| out.write(")\n") |
| |
| # Defines |
| defines = target.properties.get("defines", []) |
| if defines: |
| SetCurrentTargetProperty(out, "COMPILE_DEFINITIONS", defines, ";") |
| |
| # Compile flags |
| # "arflags", "asmflags", "cflags", |
| # "cflags_c", "clfags_cc", "cflags_objc", "clfags_objcc" |
| # CMake does not have per target lang compile flags. |
| # TODO: $<$<COMPILE_LANGUAGE:CXX>:cflags_cc style generator expression. |
| # http://public.kitware.com/Bug/view.php?id=14857 |
| flags = [] |
| flags.extend(target.properties.get("cflags", [])) |
| cflags_asm = target.properties.get("asmflags", []) |
| cflags_c = target.properties.get("cflags_c", []) |
| cflags_cxx = target.properties.get("cflags_cc", []) |
| if "c" in sources and not any(k in sources for k in ("asm", "cxx")): |
| flags.extend(cflags_c) |
| elif "cxx" in sources and not any(k in sources for k in ("asm", "c")): |
| flags.extend(cflags_cxx) |
| else: |
| # TODO: This is broken, one cannot generally set properties on files, |
| # as other targets may require different properties on the same files. |
| if "asm" in sources and cflags_asm: |
| SetFilesProperty( |
| out, sources["asm"], "COMPILE_FLAGS", cflags_asm, " " |
| ) |
| if "c" in sources and cflags_c: |
| SetFilesProperty(out, sources["c"], "COMPILE_FLAGS", cflags_c, " ") |
| if "cxx" in sources and cflags_cxx: |
| SetFilesProperty( |
| out, sources["cxx"], "COMPILE_FLAGS", cflags_cxx, " " |
| ) |
| if flags: |
| SetCurrentTargetProperty(out, "COMPILE_FLAGS", flags, " ") |
| |
| # Linker flags |
| ldflags = target.properties.get("ldflags", []) |
| if ldflags: |
| SetCurrentTargetProperty(out, "LINK_FLAGS", ldflags, " ") |
| |
| |
| gn_target_types_that_absorb_objects = ( |
| "executable", |
| "loadable_module", |
| "shared_library", |
| "static_library", |
| ) |
| |
| |
| def WriteSourceVariables(out, target, project): |
| # gn separates the sheep from the goats based on file extensions. |
| # A full separation is done here because of flag handing (see Compile flags). |
| source_types = { |
| "cxx": [], |
| "c": [], |
| "asm": [], |
| "obj": [], |
| "obj_target": [], |
| "input": [], |
| "other": [], |
| } |
| |
| all_sources = target.properties.get("sources", []) |
| |
| # As of cmake 3.11 add_library must have sources. If there are |
| # no sources, add empty.cpp as the file to compile. |
| if len(all_sources) == 0: |
| all_sources.append(posixpath.join(project.build_path, "empty.cpp")) |
| |
| # TODO .def files on Windows |
| for source in all_sources: |
| _, ext = posixpath.splitext(source) |
| source_abs_path = project.GetAbsolutePath(source) |
| source_types[source_file_types.get(ext, "other")].append( |
| source_abs_path |
| ) |
| |
| for input_path in target.properties.get("inputs", []): |
| input_abs_path = project.GetAbsolutePath(input_path) |
| source_types["input"].append(input_abs_path) |
| |
| # OBJECT library dependencies need to be listed as sources. |
| # Only executables and non-OBJECT libraries may reference an OBJECT library. |
| # https://gitlab.kitware.com/cmake/cmake/issues/14778 |
| if target.gn_type in gn_target_types_that_absorb_objects: |
| object_dependencies = set() |
| project.GetObjectSourceDependencies(target.gn_name, object_dependencies) |
| for dependency in object_dependencies: |
| cmake_dependency_name = project.GetCMakeTargetName(dependency) |
| obj_target_sources = ( |
| "$<TARGET_OBJECTS:" + cmake_dependency_name + ">" |
| ) |
| source_types["obj_target"].append(obj_target_sources) |
| |
| sources = {} |
| for source_type, sources_of_type in source_types.items(): |
| if sources_of_type: |
| sources[source_type] = "${target}__" + source_type + "_srcs" |
| SetVariableList(out, sources[source_type], sources_of_type) |
| return sources |
| |
| |
| def WriteTarget(out, target, project): |
| out.write("\n#") |
| out.write(target.gn_name) |
| out.write("\n") |
| |
| if target.cmake_type is None: |
| print( |
| "Target %s has unknown target type %s, skipping." |
| % (target.gn_name, target.gn_type) |
| ) |
| return |
| |
| SetVariable(out, "target", target.cmake_name) |
| |
| sources = WriteSourceVariables(out, target, project) |
| |
| synthetic_dependencies = set() |
| if target.gn_type == "action": |
| WriteAction(out, target, project, sources, synthetic_dependencies) |
| if target.gn_type == "action_foreach": |
| WriteActionForEach( |
| out, target, project, sources, synthetic_dependencies |
| ) |
| if target.gn_type == "copy": |
| WriteCopy(out, target, project, sources, synthetic_dependencies) |
| |
| out.write(target.cmake_type.command) |
| out.write('("${target}"') |
| if target.cmake_type.modifier is not None: |
| out.write(" ") |
| out.write(target.cmake_type.modifier) |
| for sources_type_name in sources.values(): |
| WriteVariable(out, sources_type_name, " ") |
| if synthetic_dependencies: |
| out.write(" DEPENDS") |
| for synthetic_dependencie in synthetic_dependencies: |
| WriteVariable(out, synthetic_dependencie, " ") |
| out.write(")\n") |
| |
| if target.cmake_type.command != "add_custom_target": |
| WriteCompilerFlags(out, target, project, sources) |
| |
| libraries = set() |
| nonlibraries = set() |
| |
| dependencies = set(target.properties.get("deps", [])) |
| # Transitive OBJECT libraries are in sources. |
| # Those sources are dependent on the OBJECT library dependencies. |
| # Those sources cannot bring in library dependencies. |
| object_dependencies = set() |
| if target.gn_type != "source_set": |
| project.GetObjectLibraryDependencies( |
| target.gn_name, object_dependencies |
| ) |
| for object_dependency in object_dependencies: |
| dependencies.update( |
| project.targets.get(object_dependency).get("deps", []) |
| ) |
| |
| for dependency in dependencies: |
| gn_dependency_type = project.targets.get(dependency, {}).get( |
| "type", None |
| ) |
| cmake_dependency_type = cmake_target_types.get(gn_dependency_type, None) |
| cmake_dependency_name = project.GetCMakeTargetName(dependency) |
| if cmake_dependency_type.command != "add_library": |
| nonlibraries.add(cmake_dependency_name) |
| elif cmake_dependency_type.modifier != "OBJECT": |
| if target.cmake_type.is_linkable: |
| libraries.add(cmake_dependency_name) |
| else: |
| nonlibraries.add(cmake_dependency_name) |
| |
| # Non-library dependencies. |
| if nonlibraries: |
| out.write('add_dependencies("${target}"') |
| for nonlibrary in nonlibraries: |
| out.write('\n "') |
| out.write(nonlibrary) |
| out.write('"') |
| out.write(")\n") |
| |
| # Non-OBJECT library dependencies. |
| external_libraries = target.properties.get("libs", []) |
| if target.cmake_type.is_linkable and (external_libraries or libraries): |
| library_dirs = target.properties.get("lib_dirs", []) |
| if library_dirs: |
| SetVariableList(out, "${target}__library_directories", library_dirs) |
| |
| system_libraries = [] |
| for external_library in external_libraries: |
| if "/" in external_library: |
| libraries.add(project.GetAbsolutePath(external_library)) |
| else: |
| if external_library.endswith(".framework"): |
| external_library = external_library[: -len(".framework")] |
| system_library = "library__" + external_library |
| if library_dirs: |
| system_library = system_library + "__for_${target}" |
| out.write('find_library("') |
| out.write(CMakeStringEscape(system_library)) |
| out.write('" "') |
| out.write(CMakeStringEscape(external_library)) |
| out.write('"') |
| if library_dirs: |
| out.write(' PATHS "') |
| WriteVariable(out, "${target}__library_directories") |
| out.write('"') |
| out.write(")\n") |
| system_libraries.append(system_library) |
| out.write('target_link_libraries("${target}"') |
| for library in libraries: |
| out.write('\n "') |
| out.write(CMakeStringEscape(library)) |
| out.write('"') |
| for system_library in system_libraries: |
| WriteVariable(out, system_library, '\n "') |
| out.write('"') |
| out.write(")\n") |
| |
| |
| def WriteProject(project): |
| out = open(posixpath.join(project.build_path, "CMakeLists.txt"), "w+") |
| extName = posixpath.join(project.build_path, "CMakeLists.ext") |
| out.write("# Generated by %s.\n" % os.path.basename(__file__)) |
| out.write("cmake_minimum_required(VERSION 2.8.8 FATAL_ERROR)\n") |
| out.write("cmake_policy(VERSION 2.8.8)\n\n") |
| |
| out.write('file(WRITE "') |
| out.write( |
| CMakeStringEscape(posixpath.join(project.build_path, "empty.cpp")) |
| ) |
| out.write('")\n') |
| |
| # Update the gn generated ninja build. |
| # If a build file has changed, this will update CMakeLists.ext if |
| # gn gen out/config --ide=json --json-ide-script=../../gn/gn_to_cmake.py |
| # style was used to create this config. |
| out.write("execute_process(COMMAND\n") |
| out.write(' ninja -C "') |
| out.write(CMakeStringEscape(project.build_path)) |
| out.write('" build.ninja\n') |
| out.write(" RESULT_VARIABLE ninja_result)\n") |
| out.write("if (ninja_result)\n") |
| out.write(" message(WARNING ") |
| out.write('"Regeneration failed running ninja: ${ninja_result}")\n') |
| out.write("endif()\n") |
| |
| out.write('include("') |
| out.write(CMakeStringEscape(extName)) |
| out.write('")\n') |
| out.close() |
| |
| out = open(extName, "w+") |
| out.write("# Generated by %s.\n", os.path.basename(__file__)) |
| out.write("cmake_minimum_required(VERSION 2.8.8 FATAL_ERROR)\n") |
| out.write("cmake_policy(VERSION 2.8.8)\n") |
| |
| # The following appears to be as-yet undocumented. |
| # http://public.kitware.com/Bug/view.php?id=8392 |
| out.write("enable_language(ASM)\n\n") |
| # ASM-ATT does not support .S files. |
| # output.write('enable_language(ASM-ATT)\n') |
| |
| # Current issues with automatic re-generation: |
| # The gn generated build.ninja target uses build.ninja.d |
| # but build.ninja.d does not contain the ide or gn. |
| # Currently the ide is not run if the project.json file is not changed |
| # but the ide needs to be run anyway if it has itself changed. |
| # This can be worked around by deleting the project.json file. |
| out.write('file(READ "') |
| gn_deps_file = posixpath.join(project.build_path, "build.ninja.d") |
| out.write(CMakeStringEscape(gn_deps_file)) |
| out.write('" "gn_deps_string" OFFSET ') |
| out.write(str(len("build.ninja: "))) |
| out.write(")\n") |
| # One would think this would need to worry about escaped spaces |
| # but gn doesn't escape spaces here (it generates invalid .d files). |
| out.write('string(REPLACE " " ";" "gn_deps" ${gn_deps_string})\n') |
| out.write('foreach("gn_dep" ${gn_deps})\n') |
| out.write(' configure_file("') |
| out.write(CMakeStringEscape(project.build_path)) |
| out.write('${gn_dep}" "CMakeLists.devnull" COPYONLY)\n') |
| out.write('endforeach("gn_dep")\n') |
| |
| out.write('list(APPEND other_deps "') |
| out.write(CMakeStringEscape(os.path.abspath(__file__))) |
| out.write('")\n') |
| out.write('foreach("other_dep" ${other_deps})\n') |
| out.write( |
| ' configure_file("${other_dep}" "CMakeLists.devnull" COPYONLY)\n' |
| ) |
| out.write('endforeach("other_dep")\n') |
| |
| for target_name in project.targets.keys(): |
| out.write("\n") |
| WriteTarget(out, Target(target_name, project), project) |
| |
| |
| def main(): |
| if len(sys.argv) != 2: |
| print("Usage: " + sys.argv[0] + " <json_file_name>") |
| exit(1) |
| |
| json_path = sys.argv[1] |
| project = None |
| with open(json_path, "r") as json_file: |
| project = json.loads(json_file.read()) |
| |
| WriteProject(Project(project)) |
| |
| |
| if __name__ == "__main__": |
| main() |