Demonstrate basic fingerprint cache usage.
()
| 21 | |
| 22 | |
| 23 | def demo_basic_usage() -> None: |
| 24 | """Demonstrate basic fingerprint cache usage.""" |
| 25 | print("=== Basic Fingerprint Cache Demo ===") |
| 26 | |
| 27 | with tempfile.TemporaryDirectory() as temp_dir: |
| 28 | temp_path = Path(temp_dir) |
| 29 | cache_file = temp_path / "demo_cache.json" |
| 30 | cache = FingerprintCache(cache_file) |
| 31 | |
| 32 | # Create a source file |
| 33 | source_file = temp_path / "example.cpp" |
| 34 | with open(source_file, "w") as f: |
| 35 | f.write("#include <iostream>\nint main() { return 0; }") |
| 36 | |
| 37 | baseline_time = time.time() - 3600 # 1 hour ago |
| 38 | current_modtime = os.path.getmtime(source_file) |
| 39 | |
| 40 | print(f"Source file: {source_file}") |
| 41 | print(f"Baseline time: {baseline_time}") |
| 42 | print(f"Current modtime: {current_modtime}") |
| 43 | |
| 44 | # First check - file is newer than baseline |
| 45 | changed = cache.has_changed(source_file, baseline_time) |
| 46 | print(f"First check (vs baseline): {changed} (expected: True)") |
| 47 | |
| 48 | # Second check - same modtime |
| 49 | changed = cache.has_changed(source_file, current_modtime) |
| 50 | print(f"Second check (same modtime): {changed} (expected: False)") |
| 51 | |
| 52 | # Touch file (change modtime but not content) |
| 53 | time.sleep(0.01) |
| 54 | source_file.touch() |
| 55 | |
| 56 | # Third check - modtime changed but content same |
| 57 | changed = cache.has_changed(source_file, current_modtime) |
| 58 | print( |
| 59 | f"Third check (touched file): {changed} (expected: False - content unchanged)" |
| 60 | ) |
| 61 | |
| 62 | # Actually modify content |
| 63 | time.sleep(0.01) |
| 64 | with open(source_file, "w") as f: |
| 65 | f.write( |
| 66 | '#include <iostream>\nint main() { std::cout << "Hello"; return 0; }' |
| 67 | ) |
| 68 | |
| 69 | # Fourth check - content actually changed |
| 70 | changed = cache.has_changed(source_file, current_modtime) |
| 71 | print(f"Fourth check (content changed): {changed} (expected: True)") |
| 72 | |
| 73 | |
| 74 | def demo_build_system_workflow() -> None: |
no test coverage detected