prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  Please add a progress bar to "wagtail_update_image_renditions" management command
  I love this new management command to regenerate all image renditions `wagtail_update_image_renditions`. But often the websites I had to use it on had many thousands of images and this command would need some hours to complete. I would love to see some kind of **progress feedback** in the terminal to get an idea of the time this task might need to complete. This could be text based of even a bar, like we know from packages like "tqdm".
  
  </issue>
  <code>
  [start of wagtail/images/management/commands/wagtail_update_image_renditions.py]
  1 import logging
  2 
  3 from django.core.management.base import BaseCommand
  4 from django.db import transaction
  5 
  6 from wagtail.images import get_image_model
  7 
  8 logger = logging.getLogger(__name__)
  9 
  10 
  11 class Command(BaseCommand):
  12     """Command to create missing image renditions with the option to remove (purge) any existing ones."""
  13 
  14     help = "This command will generate all image renditions, with an option to purge existing renditions first."
  15 
  16     def add_arguments(self, parser):
  17         parser.add_argument(
  18             "--purge-only",
  19             action="store_true",
  20             help="Purge all image renditions without regenerating them",
  21         )
  22         parser.add_argument(
  23             "--chunk-size",
  24             type=int,
  25             default=50,
  26             help="Operate in x size chunks (default: %(default)s)",
  27         )
  28 
  29     def handle(self, *args, **options):
  30         Rendition = get_image_model().get_rendition_model()
  31 
  32         renditions = Rendition.objects.all()
  33 
  34         purge_only = options["purge_only"]
  35 
  36         if not renditions.exists():
  37             self.stdout.write(self.style.WARNING("No image renditions found."))
  38             return
  39 
  40         rendition_ids = list(renditions.values_list("id", flat=True))
  41         num_renditions = len(rendition_ids)
  42 
  43         if purge_only:
  44             self.stdout.write(
  45                 self.style.HTTP_INFO(f"Purging {num_renditions} rendition(s)")
  46             )
  47         else:
  48             self.stdout.write(
  49                 self.style.HTTP_INFO(f"Regenerating {num_renditions} rendition(s)")
  50             )
  51 
  52         for rendition in (
  53             # Pre-calculate the ids of the renditions to change,
  54             # otherwise `.iterator` never ends.
  55             renditions.filter(id__in=rendition_ids)
  56             .select_related("image")
  57             .iterator(chunk_size=options["chunk_size"])
  58         ):
  59             try:
  60                 with transaction.atomic():
  61                     rendition_filter = rendition.filter
  62                     rendition_image = rendition.image
  63 
  64                     # Delete the existing rendition
  65                     rendition.delete()
  66 
  67                     if not purge_only:
  68                         # Create a new one
  69                         rendition_image.get_rendition(rendition_filter)
  70             except:  # noqa:E722
  71                 logger.exception("Error operating on rendition %d", rendition.id)
  72                 self.stderr.write(
  73                     self.style.ERROR(f"Failed to operate on rendition {rendition.id}")
  74                 )
  75                 num_renditions -= 1
  76 
  77         if num_renditions:
  78             self.stdout.write(
  79                 self.style.SUCCESS(
  80                     f"Successfully processed {num_renditions} rendition(s)"
  81                 )
  82             )
  83         else:
  84             self.stdout.write(self.style.WARNING("Could not process any renditions."))
  85
  [end of wagtail/images/management/commands/wagtail_update_image_renditions.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: diff --git a/wagtail/images/management/commands/wagtail_update_image_renditions.py b/wagtail/images/management/commands/wagtail_update_image_renditions.py
  --- a/wagtail/images/management/commands/wagtail_update_image_renditions.py
  +++ b/wagtail/images/management/commands/wagtail_update_image_renditions.py
  @@ -8,6 +8,17 @@
   logger = logging.getLogger(__name__)
   
   
  +def progress_bar(current, total, bar_length=50):
  +    fraction = current / total
  +
  +    arrow = int(fraction * bar_length - 1) * "-" + ">"
  +    padding = int(bar_length - len(arrow)) * " "
  +
  +    ending = "\n" if current == total else "\r"
  +
  +    return (f"Progress: [{arrow}{padding}] {int(fraction*100)}%", ending)
  +
  +
   class Command(BaseCommand):
       """Command to create missing image renditions with the option to remove (purge) any existing ones."""
   
  @@ -49,6 +60,7 @@
                   self.style.HTTP_INFO(f"Regenerating {num_renditions} rendition(s)")
               )
   
  +        progress_bar_current = 1
           for rendition in (
               # Pre-calculate the ids of the renditions to change,
               # otherwise `.iterator` never ends.
  @@ -64,6 +76,10 @@
                       # Delete the existing rendition
                       rendition.delete()
   
  +                    _progress_bar = progress_bar(progress_bar_current, num_renditions)
  +                    self.stdout.write(_progress_bar[0], ending=_progress_bar[1])
  +                    progress_bar_current = progress_bar_current + 1
  +
                       if not purge_only:
                           # Create a new one
                           rendition_image.get_rendition(rendition_filter)
  
verification_info: {"golden_diff": "diff --git a/wagtail/images/management/commands/wagtail_update_image_renditions.py b/wagtail/images/management/commands/wagtail_update_image_renditions.py\n--- a/wagtail/images/management/commands/wagtail_update_image_renditions.py\n+++ b/wagtail/images/management/commands/wagtail_update_image_renditions.py\n@@ -8,6 +8,17 @@\n logger = logging.getLogger(__name__)\n \n \n+def progress_bar(current, total, bar_length=50):\n+    fraction = current / total\n+\n+    arrow = int(fraction * bar_length - 1) * \"-\" + \">\"\n+    padding = int(bar_length - len(arrow)) * \" \"\n+\n+    ending = \"\\n\" if current == total else \"\\r\"\n+\n+    return (f\"Progress: [{arrow}{padding}] {int(fraction*100)}%\", ending)\n+\n+\n class Command(BaseCommand):\n     \"\"\"Command to create missing image renditions with the option to remove (purge) any existing ones.\"\"\"\n \n@@ -49,6 +60,7 @@\n                 self.style.HTTP_INFO(f\"Regenerating {num_renditions} rendition(s)\")\n             )\n \n+        progress_bar_current = 1\n         for rendition in (\n             # Pre-calculate the ids of the renditions to change,\n             # otherwise `.iterator` never ends.\n@@ -64,6 +76,10 @@\n                     # Delete the existing rendition\n                     rendition.delete()\n \n+                    _progress_bar = progress_bar(progress_bar_current, num_renditions)\n+                    self.stdout.write(_progress_bar[0], ending=_progress_bar[1])\n+                    progress_bar_current = progress_bar_current + 1\n+\n                     if not purge_only:\n                         # Create a new one\n                         rendition_image.get_rendition(rendition_filter)\n", "issue": "Please add a progress bar to \"wagtail_update_image_renditions\" management command\nI love this new management command to regenerate all image renditions `wagtail_update_image_renditions`. But often the websites I had to use it on had many thousands of images and this command would need some hours to complete. I would love to see some kind of **progress feedback** in the terminal to get an idea of the time this task might need to complete. This could be text based of even a bar, like we know from packages like \"tqdm\".\n", "before_files": [{"content": "import logging\n\nfrom django.core.management.base import BaseCommand\nfrom django.db import transaction\n\nfrom wagtail.images import get_image_model\n\nlogger = logging.getLogger(__name__)\n\n\nclass Command(BaseCommand):\n    \"\"\"Command to create missing image renditions with the option to remove (purge) any existing ones.\"\"\"\n\n    help = \"This command will generate all image renditions, with an option to purge existing renditions first.\"\n\n    def add_arguments(self, parser):\n        parser.add_argument(\n            \"--purge-only\",\n            action=\"store_true\",\n            help=\"Purge all image renditions without regenerating them\",\n        )\n        parser.add_argument(\n            \"--chunk-size\",\n            type=int,\n            default=50,\n            help=\"Operate in x size chunks (default: %(default)s)\",\n        )\n\n    def handle(self, *args, **options):\n        Rendition = get_image_model().get_rendition_model()\n\n        renditions = Rendition.objects.all()\n\n        purge_only = options[\"purge_only\"]\n\n        if not renditions.exists():\n            self.stdout.write(self.style.WARNING(\"No image renditions found.\"))\n            return\n\n        rendition_ids = list(renditions.values_list(\"id\", flat=True))\n        num_renditions = len(rendition_ids)\n\n        if purge_only:\n            self.stdout.write(\n                self.style.HTTP_INFO(f\"Purging {num_renditions} rendition(s)\")\n            )\n        else:\n            self.stdout.write(\n                self.style.HTTP_INFO(f\"Regenerating {num_renditions} rendition(s)\")\n            )\n\n        for rendition in (\n            # Pre-calculate the ids of the renditions to change,\n            # otherwise `.iterator` never ends.\n            renditions.filter(id__in=rendition_ids)\n            .select_related(\"image\")\n            .iterator(chunk_size=options[\"chunk_size\"])\n        ):\n            try:\n                with transaction.atomic():\n                    rendition_filter = rendition.filter\n                    rendition_image = rendition.image\n\n                    # Delete the existing rendition\n                    rendition.delete()\n\n                    if not purge_only:\n                        # Create a new one\n                        rendition_image.get_rendition(rendition_filter)\n            except:  # noqa:E722\n                logger.exception(\"Error operating on rendition %d\", rendition.id)\n                self.stderr.write(\n                    self.style.ERROR(f\"Failed to operate on rendition {rendition.id}\")\n                )\n                num_renditions -= 1\n\n        if num_renditions:\n            self.stdout.write(\n                self.style.SUCCESS(\n                    f\"Successfully processed {num_renditions} rendition(s)\"\n                )\n            )\n        else:\n            self.stdout.write(self.style.WARNING(\"Could not process any renditions.\"))\n", "path": "wagtail/images/management/commands/wagtail_update_image_renditions.py"}]}