initial commit

2026-09-21 13:41:40 +09:00
commit 855c7328df
411 changed files with 85352 additions and 0 deletions
@@ -0,0 +1,95 @@
+#!/usr/bin/env python3
+"""Export the second PDFium candidate, preserving the first candidate evidence."""
+import difflib
+import hashlib
+import json
+from pathlib import Path
+import subprocess
+import tarfile
+import tempfile
+
+ROOT = Path(__file__).resolve().parents[2]
+
+
+def sha(path):
+    with path.open('rb') as stream:
+        return hashlib.file_digest(stream, 'sha256').hexdigest()
+
+
+def main():
+    results = ROOT / 'tests/results/pdfium-intent-context'
+    materialization = json.loads((ROOT / 'tests/results/pdfium-intent-build/source-materialization.json').read_text())
+    repository = next(row for row in materialization['repositories'] if row['path'] == '.')
+    archive = ROOT / repository['archive']
+    inventory = ROOT / repository['inventory']
+    assert sha(archive) == repository['archiveSha256']
+    assert sha(inventory) == repository['inventorySha256']
+    source = ROOT / 'build-pdfium-intent-context/source'
+    originals = {row['path']: row for line in inventory.open()
+                 if (row := json.loads(line))['archived'] and row['path'].startswith('core/')}
+    changed = {}
+    for name, row in originals.items():
+        assert row['mode'] == '100644'
+        if sha(source / name) != row['sha256']:
+            changed[name] = row
+    added = {str(path.relative_to(source)) for path in (source / 'core').rglob('*')
+             if path.is_file() and str(path.relative_to(source)) not in originals}
+    assert all(Path(name).suffix in ('.h', '.cpp') for name in added)
+    chunks = []
+    records = []
+    with tarfile.open(archive) as tar:
+        for name in sorted(changed.keys() | added):
+            before = b'' if name in added else tar.extractfile('pdfium/' + name).read()
+            if name in changed:
+                assert hashlib.sha256(before).hexdigest() == changed[name]['sha256']
+            after = (source / name).read_bytes()
+            diff = ''.join(difflib.unified_diff(
+                before.decode().splitlines(keepends=True),
+                after.decode().splitlines(keepends=True),
+                fromfile='/dev/null' if name in added else 'a/' + name,
+                tofile='b/' + name))
+            assert diff
+            chunks.append('diff --git a/' + name + ' b/' + name + '\n' + diff)
+            records.append({'path': name, 'added': name in added,
+                            'beforeSha256': None if name in added else hashlib.sha256(before).hexdigest(),
+                            'afterSha256': hashlib.sha256(after).hexdigest()})
+    destination = ROOT / 'cmake/patches/pdfium-rendering-intent-context.patch'
+    destination.parent.mkdir(parents=True, exist_ok=True)
+    destination.write_text(''.join(chunks))
+    snapshot = results / 'patches' / (sha(destination) + '.patch')
+    snapshot.parent.mkdir(exist_ok=True)
+    if snapshot.exists():
+        assert snapshot.read_bytes() == destination.read_bytes()
+    else:
+        snapshot.write_bytes(destination.read_bytes())
+    # Check that this reviewable patch, rather than an unrecorded local change,
+    # reproduces every modified core source without fuzzy matching.
+    with tempfile.TemporaryDirectory(prefix='docview-pdfium-patch-') as folder:
+        check_root = Path(folder)
+        with tarfile.open(archive) as tar:
+            for name in changed:
+                target = check_root / name
+                target.parent.mkdir(parents=True, exist_ok=True)
+                target.write_bytes(tar.extractfile('pdfium/' + name).read())
+        result = subprocess.run(['patch', '-p1', '--batch', '--fuzz=0', '-i', str(destination)],
+                                cwd=check_root, capture_output=True, text=True)
+        assert result.returncode == 0, result.stdout + result.stderr
+        for row in records:
+            assert sha(check_root / row['path']) == row['afterSha256']
+    record = {'success': True, 'exporterSha256': sha(Path(__file__)),
+              'source': str(source.relative_to(ROOT)),
+              'parentRecord': 'tests/results/pdfium-intent-build/record.json',
+              'parentRecordSha256': sha(ROOT / 'tests/results/pdfium-intent-build/record.json'),
+              'baseRevision': repository['revision'], 'archiveSha256': sha(archive),
+              'patch': str(destination.relative_to(ROOT)), 'patchSha256': sha(destination),
+              'patchSnapshot': str(snapshot.relative_to(ROOT)),
+              'appliesWithoutFuzz': True, 'appliedSourcesByteIdentical': True,
+              'files': records,
+              'scope': 'Candidate core patch only. Provider shared-library/public-header patches are recorded separately. Production dependency is not replaced by this exporter.'}
+    (results / 'candidate-patch.json').write_text(json.dumps(record, indent=2) + '\n')
+    print(json.dumps({'files': len(records), 'patchBytes': destination.stat().st_size,
+                      'patchSha256': record['patchSha256']}))
+
+
+if __name__ == '__main__':
+    main()