codekingpro/portable-devtools

1import distutils.command.build_clib as orig2from distutils.errors import DistutilsSetupError3from distutils import log4 5try:6    from distutils._modified import newer_pairwise_group7except ImportError:8    # fallback for SETUPTOOLS_USE_DISTUTILS=stdlib9    from .._distutils._modified import newer_pairwise_group10 11 12class build_clib(orig.build_clib):13    """14    Override the default build_clib behaviour to do the following:15 16    1. Implement a rudimentary timestamp-based dependency system17       so 'compile()' doesn't run every time.18    2. Add more keys to the 'build_info' dictionary:19        * obj_deps - specify dependencies for each object compiled.20                     this should be a dictionary mapping a key21                     with the source filename to a list of22                     dependencies. Use an empty string for global23                     dependencies.24        * cflags   - specify a list of additional flags to pass to25                     the compiler.26    """27 28    def build_libraries(self, libraries):29        for lib_name, build_info in libraries:30            sources = build_info.get('sources')31            if sources is None or not isinstance(sources, (list, tuple)):32                raise DistutilsSetupError(33                    "in 'libraries' option (library '%s'), "34                    "'sources' must be present and must be "35                    "a list of source filenames" % lib_name36                )37            sources = sorted(list(sources))38 39            log.info("building '%s' library", lib_name)40 41            # Make sure everything is the correct type.42            # obj_deps should be a dictionary of keys as sources43            # and a list/tuple of files that are its dependencies.44            obj_deps = build_info.get('obj_deps', dict())45            if not isinstance(obj_deps, dict):46                raise DistutilsSetupError(47                    "in 'libraries' option (library '%s'), "48                    "'obj_deps' must be a dictionary of "49                    "type 'source: list'" % lib_name50                )51            dependencies = []52 53            # Get the global dependencies that are specified by the '' key.54            # These will go into every source's dependency list.55            global_deps = obj_deps.get('', list())56            if not isinstance(global_deps, (list, tuple)):57                raise DistutilsSetupError(58                    "in 'libraries' option (library '%s'), "59                    "'obj_deps' must be a dictionary of "60                    "type 'source: list'" % lib_name61                )62 63            # Build the list to be used by newer_pairwise_group64            # each source will be auto-added to its dependencies.65            for source in sources:66                src_deps = [source]67                src_deps.extend(global_deps)68                extra_deps = obj_deps.get(source, list())69                if not isinstance(extra_deps, (list, tuple)):70                    raise DistutilsSetupError(71                        "in 'libraries' option (library '%s'), "72                        "'obj_deps' must be a dictionary of "73                        "type 'source: list'" % lib_name74                    )75                src_deps.extend(extra_deps)76                dependencies.append(src_deps)77 78            expected_objects = self.compiler.object_filenames(79                sources,80                output_dir=self.build_temp,81            )82 83            if newer_pairwise_group(dependencies, expected_objects) != ([], []):84                # First, compile the source code to object files in the library85                # directory.  (This should probably change to putting object86                # files in a temporary build directory.)87                macros = build_info.get('macros')88                include_dirs = build_info.get('include_dirs')89                cflags = build_info.get('cflags')90                self.compiler.compile(91                    sources,92                    output_dir=self.build_temp,93                    macros=macros,94                    include_dirs=include_dirs,95                    extra_postargs=cflags,96                    debug=self.debug,97                )98 99            # Now "link" the object files together into a static library.100            # (On Unix at least, this isn't really linking -- it just101            # builds an archive.  Whatever.)102            self.compiler.create_static_lib(103                expected_objects, lib_name, output_dir=self.build_clib, debug=self.debug104            )105