Converts the conversion into a database migration

src/documents/management/commands/convert_thumbnails.py

@@ -1,97 +0,0 @@
-import logging
-import multiprocessing.pool
-import shutil
-import tempfile
-import time
-from pathlib import Path
-
-from django.core.management.base import BaseCommand
-from documents.models import Document
-from documents.parsers import run_convert
-
-logger = logging.getLogger("paperless.management.convert_thumbnails")
-
-
-def _do_convert(work_package):
-    _, existing_thumbnail, converted_thumbnail = work_package
-    try:
-
-        logger.info(f"Converting thumbnail: {existing_thumbnail}")
-
-        # Run actual conversion
-        run_convert(
-            density=300,
-            scale="500x5000>",
-            alpha="remove",
-            strip=True,
-            trim=False,
-            auto_orient=True,
-            input_file=f"{existing_thumbnail}[0]",
-            output_file=str(converted_thumbnail),
-        )
-
-        # Copy newly created thumbnail to thumbnail directory
-        shutil.copy(converted_thumbnail, existing_thumbnail.parent)
-
-        # Remove the PNG version
-        existing_thumbnail.unlink()
-
-        logger.info(
-            "Conversion to WebP completed, "
-            f"replaced {existing_thumbnail.name} with {converted_thumbnail.name}",
-        )
-
-    except Exception as e:
-        logger.error(
-            f"Error converting thumbnail" f" (existing file unchanged): {e}",
-        )
-
-
-class Command(BaseCommand):
-
-    help = """
-        Converts existing PNG thumbnails into
-        WebP format.
-    """.replace(
-        "    ",
-        "",
-    )
-
-    def handle(self, *args, **options):
-
-        logger.info("Converting all PNG thumbnails to WebP")
-        start = time.time()
-        documents = Document.objects.all()
-
-        with tempfile.TemporaryDirectory() as tempdir:
-
-            work_packages = []
-
-            for document in documents:
-                existing_thumbnail = Path(document.thumbnail_path).resolve()
-
-                if existing_thumbnail.suffix == ".png":
-
-                    # Change the existing filename suffix from png to webp
-                    converted_thumbnail_name = existing_thumbnail.with_suffix(
-                        ".webp",
-                    ).name
-
-                    # Create the expected output filename in the tempdir
-                    converted_thumbnail = (
-                        Path(tempdir) / Path(converted_thumbnail_name)
-                    ).resolve()
-
-                    # Package up the necessary info
-                    work_packages.append(
-                        (document, existing_thumbnail, converted_thumbnail),
-                    )
-
-            if len(work_packages):
-                with multiprocessing.pool.Pool(processes=4, maxtasksperchild=4) as pool:
-                    pool.map(_do_convert, work_packages)
-
-            end = time.time()
-            duration = end - start
-
-        logger.info(f"Conversion completed in {duration:.3f}s")