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- from pathlib import Path
- from difflib import unified_diff
- root = Path(__file__).parent
- parts = []
- count = 0
- for base in sorted((root / 'base').rglob('*.java')):
- rel = base.relative_to(root / 'base').as_posix()
- work = root / 'work' / rel
- old = base.read_text(encoding='utf-8').splitlines(keepends=True)
- new = work.read_text(encoding='utf-8').splitlines(keepends=True)
- if old != new:
- parts.append(''.join(unified_diff(old, new, fromfile='a/' + rel, tofile='b/' + rel)))
- count += 1
- out = root / 't28-backend.patch'
- out.write_text(''.join(parts), encoding='utf-8', newline='\n')
- print(f'Prepared {out}: {count} changed files; no backend mutation or test execution.')
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