73 lines
1.9 KiB
Python
73 lines
1.9 KiB
Python
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import re
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import SCons
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from SCons.Action import Action
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from SCons.Scanner import Scanner
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pyx_from_import_re = re.compile(r'^from\s+(\S+)\s+cimport', re.M)
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pyx_import_re = re.compile(r'^cimport\s+(\S+)', re.M)
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cdef_import_re = re.compile(r'^cdef extern from\s+.(\S+).:', re.M)
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def pyx_scan(node, env, path, arg=None):
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contents = node.get_text_contents()
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# from <module> cimport ...
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matches = pyx_from_import_re.findall(contents)
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# cimport <module>
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matches += pyx_import_re.findall(contents)
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# Modules can be either .pxd or .pyx files
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files = [m.replace('.', '/') + '.pxd' for m in matches]
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files += [m.replace('.', '/') + '.pyx' for m in matches]
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# cdef extern from <file>
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files += cdef_import_re.findall(contents)
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# Handle relative imports
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cur_dir = str(node.get_dir())
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files = [cur_dir + f if f.startswith('/') else f for f in files]
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# Filter out non-existing files (probably system imports)
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files = [f for f in files if env.File(f).exists()]
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return env.File(files)
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pyxscanner = Scanner(function=pyx_scan, skeys=['.pyx', '.pxd'], recursive=True)
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cythonAction = Action("$CYTHONCOM")
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def create_builder(env):
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try:
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cython = env['BUILDERS']['Cython']
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except KeyError:
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cython = SCons.Builder.Builder(
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action=cythonAction,
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emitter={},
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suffix=cython_suffix_emitter,
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single_source=1
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)
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env.Append(SCANNERS=pyxscanner)
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env['BUILDERS']['Cython'] = cython
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return cython
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def cython_suffix_emitter(env, source):
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return "$CYTHONCFILESUFFIX"
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def generate(env):
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env["CYTHON"] = "cythonize"
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env["CYTHONCOM"] = "$CYTHON $CYTHONFLAGS $SOURCE"
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env["CYTHONCFILESUFFIX"] = ".cpp"
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c_file, _ = SCons.Tool.createCFileBuilders(env)
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c_file.suffix['.pyx'] = cython_suffix_emitter
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c_file.add_action('.pyx', cythonAction)
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c_file.suffix['.py'] = cython_suffix_emitter
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c_file.add_action('.py', cythonAction)
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create_builder(env)
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def exists(env):
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return True
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