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SnapOtterandGitHub
8b3f1e6884
Conversion engines wrote their own names into PDF metadata: LibreOffice, Ghostscript, pdfcpu, WeasyPrint, and PDFKit all stamped Producer/Creator on generated files. A new doc_scrub_meta docs-profile script (PyMuPDF) rewrites both fields to SnapOtter and drops the stale XMP copy; the worker applies it to the 25 PDF-generating tools before outputs reach object storage. Best effort by design: any failure keeps the original bytes and only logs a warning. Deliberately untouched: tools that edit the user's own PDF and preserve its metadata (qpdf edits, sign, flatten), encrypted outputs (copied through), and pdfa-convert, where a metadata rewrite risks PDF/A conformance. Claude-Session: https://claude.ai/code/session_01XGB4pGvTvb7sUX4JN745U7
50 lines
1.7 KiB
Python
50 lines
1.7 KiB
Python
"""Set the PDF Producer/Creator to SnapOtter on generated documents.
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Conversion engines stamp themselves (LibreOffice, Ghostscript, pdfcpu,
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WeasyPrint, PDFKit); from the user's point of view SnapOtter produced the
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file. Only runs for tools that GENERATE PDFs; pass-through edits keep the
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user's original metadata untouched.
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Args: {"path": in, "out": out}. Prints {"ok": true}."""
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import json
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import sys
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def main():
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args = json.loads(sys.argv[1]) if len(sys.argv) > 1 else {}
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path, out = args.get("path"), args.get("out")
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if not path or not out:
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print(json.dumps({"error": "missing path/out"}))
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sys.exit(1)
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try:
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import fitz
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except ImportError:
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print(json.dumps({"error": "PyMuPDF not installed"}))
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sys.exit(1)
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try:
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doc = fitz.open(path)
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if doc.needs_pass:
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# Encrypted output: pass it through untouched rather than
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# re-encrypting. `out` must always exist for the caller.
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doc.close()
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import shutil
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shutil.copyfile(path, out)
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print(json.dumps({"ok": True, "skipped": "encrypted"}))
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return
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meta = doc.metadata or {}
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meta["producer"] = "SnapOtter"
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meta["creator"] = "SnapOtter"
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doc.set_metadata(meta)
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# XMP often carries the engine's own pdf:Producer; DocInfo is the
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# canonical source for these files, so drop the stale copy.
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doc.del_xml_metadata()
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doc.save(out)
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doc.close()
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print(json.dumps({"ok": True}))
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except Exception as exc: # noqa: BLE001
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print(json.dumps({"error": str(exc)}))
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sys.exit(1)
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if __name__ == "__main__":
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main()
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