SCons PreProcessor patch class This class provides methods to patch the SCons PreProcessor to handle conditional compilation directives properly.
| 25 | from SCons.Script import * |
| 26 | |
| 27 | class SConsPreProcessorPatch: |
| 28 | """ |
| 29 | SCons PreProcessor patch class |
| 30 | |
| 31 | This class provides methods to patch the SCons PreProcessor |
| 32 | to handle conditional compilation directives properly. |
| 33 | """ |
| 34 | |
| 35 | def __init__(self): |
| 36 | """Initialize the PreProcessor patch""" |
| 37 | self._patched_preprocessor = None |
| 38 | self._apply_patch() |
| 39 | |
| 40 | def _apply_patch(self): |
| 41 | """ |
| 42 | Apply the patch to SCons PreProcessor |
| 43 | |
| 44 | This method patches the SCons.cpp.PreProcessor class with |
| 45 | custom methods for handling includes during conditional compilation. |
| 46 | """ |
| 47 | from SCons import cpp |
| 48 | |
| 49 | # Store reference to original PreProcessor |
| 50 | self._patched_preprocessor = cpp.PreProcessor |
| 51 | |
| 52 | # Create bound methods for the patch |
| 53 | def start_handling_includes(preprocessor_self, t=None): |
| 54 | d = preprocessor_self.dispatch_table |
| 55 | p = preprocessor_self.stack[-1] if preprocessor_self.stack else preprocessor_self.default_table |
| 56 | for k in ('import', 'include', 'include_next', 'define'): |
| 57 | d[k] = p[k] |
| 58 | |
| 59 | def stop_handling_includes(preprocessor_self, t=None): |
| 60 | d = preprocessor_self.dispatch_table |
| 61 | d['import'] = preprocessor_self.do_nothing |
| 62 | d['include'] = preprocessor_self.do_nothing |
| 63 | d['include_next'] = preprocessor_self.do_nothing |
| 64 | d['define'] = preprocessor_self.do_nothing |
| 65 | |
| 66 | # Apply the patch methods |
| 67 | self._patched_preprocessor.start_handling_includes = start_handling_includes |
| 68 | self._patched_preprocessor.stop_handling_includes = stop_handling_includes |
| 69 | |
| 70 | def get_patched_preprocessor(self): |
| 71 | return self._patched_preprocessor |
| 72 | |
| 73 | def create_preprocessor_instance(self): |
| 74 | return self._patched_preprocessor() |
| 75 | |
| 76 | # Global instance for easy access |
| 77 | _preprocessor_patch = None |
no outgoing calls