def _generate_swig_wrappers(interface_files, output_directory):
"""
Generates SWIG Wrapper files (.cxx) and python modules that can be
compiled into a shared library by distutils.
:raises: ``EnvironmentError`` if swig is not installed.
"""
if swig_path is None:
raise EnvironmentError("No swig executable found.")
output_directory = _utils.resolve_path(output_directory)
for current_file in interface_files:
module_name = _utils.file_name(current_file)
output_file = os.path.join(
output_directory, "%s_wrap.cxx" % (module_name, )
)
# Let swig generate the wrapper files.
subprocess.check_call(
[swig_path, "-c++", "-python", "-o", output_file, current_file],
cwd = output_directory,
stdout = _utils.DEVNULL,
stderr = subprocess.STDOUT
)
def _generate_swig_interface(file_path, output_directory):
"""
Generates a SWIG Interface file (.i) that can be compiled with SWIG to
a shared library file that can be imported into python for testing.
"""
file_path = _utils.resolve_path(file_path)
output_directory = _utils.resolve_path(output_directory)
# Figure out what this module will be named by getting just the filename
# (minus extension) of the code file.
module_name = _utils.file_name(file_path)
# -MM flag returns all dependencies needed to compile file.
gpp_process = subprocess.Popen(
["g++", "-MM", file_path],
stdout = subprocess.PIPE,
stderr = subprocess.STDOUT
)
gpp_output = gpp_process.communicate()[0]
# Get dependencies, minus the .o file and the white space
gpp_output = gpp_output.split(":")[1].strip()
dependencies = [i.strip() for i in gpp_output.split(" ") if i.strip() != "\\"]
necessary_includes = []
for include in dependencies:
necessary_includes.append("#include \"%s\"" % (include))
# TODO: Add comment describing what's going on here.
if ".h" in include:
include = include.replace(".hpp", ".h")
include = include.replace(".h", ".cpp")
if file_path not in include and os.path.isfile(include):
necessary_includes.append("#include \"%s\"" % (include))
with open(os.path.join(output_directory, module_name + ".i"), "w") as f:
f.write("%%module %s\n\n" % (module_name, ))
# Ensure we include all of the special swig interface files that allow
# us to interop with the C++ Standard Library.
for interface in STD_INTERFACES:
f.write("%%include \"%s\"\n" % (interface, ))
# Write directives inside and out of wrapper for consistency in wrapped
# file.
f.write("\n".join(EXPOSURE_DIRECTIVES) + "\n")
f.write("using namespace std;\n\n")
f.write("%{\n")
f.write("\n".join(EXPOSURE_DIRECTIVES) + "\n")
for include in necessary_includes:
f.write("%s\n" % include)
f.write("%}\n\n")
# SWIG cannot import global include like iostream, but it does need
# all local includes
local_includes = \
(include for include in necessary_includes if '<' not in include)
for include in local_includes:
f.write("%s\n" % include.replace("#", "%"))
return module_name