prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  Reclaim space for repository fails with Cannot delete some instances of model 'Artifact' because they are referenced through protected foreign keys: 'ContentArtifact.artifact'."
  **Version**
  3.16, but probably all versions
  
  **Describe the bug**
  
  - Reclaim space for repository fails with the following error.
  
    ~~~
    Task paused with error: "("Cannot delete some instances of model 'Artifact' because they are referenced through protected foreign keys: 'ContentArtifact.artifact'.", {<ContentArtifact: pk=452959ad-c045-4e85-bf9f-6651ba37f57d>})"
    ~~~
  
  **To Reproduce**
  See BZ
  
  **Additional context**
  https://bugzilla.redhat.com/show_bug.cgi?id=2169322
  
  
  </issue>
  <code>
  [start of pulpcore/app/tasks/reclaim_space.py]
  1 from pulpcore.app.models import (
  2     Artifact,
  3     Content,
  4     ContentArtifact,
  5     ProgressReport,
  6     PublishedMetadata,
  7     Repository,
  8     RepositoryVersion,
  9 )
  10 from pulpcore.app.util import get_domain
  11 
  12 
  13 def reclaim_space(repo_pks, keeplist_rv_pks=None, force=False):
  14     """
  15     This task frees-up disk space by removing Artifact files from the filesystem for Content
  16     exclusive to the list of provided repos.
  17 
  18     Note: content marked as `proctected` will be excluded from the reclaim disk space.
  19 
  20     Kwargs:
  21         repo_pks (list): A list of repo pks the disk reclaim space is performed on.
  22         keeplist_rv_pks (list): A list of repo version pks that will be excluded from the reclaim
  23         disk space.
  24         force (bool): If True, uploaded content will be taken into account.
  25 
  26     """
  27     reclaimed_repos = Repository.objects.filter(pk__in=repo_pks)
  28     for repo in reclaimed_repos:
  29         repo.invalidate_cache(everything=True)
  30 
  31     domain = get_domain()
  32     rest_of_repos = Repository.objects.filter(pulp_domain=domain).exclude(pk__in=repo_pks)
  33     c_keep_qs = Content.objects.filter(repositories__in=rest_of_repos)
  34     c_reclaim_qs = Content.objects.filter(repositories__in=repo_pks)
  35     c_reclaim_qs = c_reclaim_qs.exclude(
  36         pk__in=c_keep_qs, pulp_type=PublishedMetadata.get_pulp_type()
  37     )
  38 
  39     if keeplist_rv_pks:
  40         rv_qs = RepositoryVersion.objects.filter(pk__in=keeplist_rv_pks)
  41         rv_content = Content.objects.none()
  42         for rv in rv_qs.iterator():
  43             rv_content |= rv.content
  44         c_reclaim_qs = c_reclaim_qs.exclude(pk__in=rv_content)
  45 
  46     content_distinct = c_reclaim_qs.distinct("pulp_type")
  47     unprotected = []
  48     for content in content_distinct:
  49         if not content.cast().PROTECTED_FROM_RECLAIM:
  50             unprotected.append(content.pulp_type)
  51 
  52     ca_qs = ContentArtifact.objects.select_related("content", "artifact").filter(
  53         content__in=c_reclaim_qs.values("pk"), artifact__isnull=False
  54     )
  55     if not force:
  56         ca_qs = ca_qs.filter(remoteartifact__isnull=False)
  57     artifact_pks = set()
  58     ca_to_update = []
  59     for ca in ca_qs.iterator():
  60         if ca.content.pulp_type in unprotected:
  61             artifact_pks.add(ca.artifact.pk)
  62             ca.artifact = None
  63             ca_to_update.append(ca)
  64 
  65     ContentArtifact.objects.bulk_update(objs=ca_to_update, fields=["artifact"], batch_size=1000)
  66     artifacts_to_delete = Artifact.objects.filter(pk__in=artifact_pks)
  67     progress_bar = ProgressReport(
  68         message="Reclaim disk space",
  69         total=artifacts_to_delete.count(),
  70         code="reclaim-space.artifact",
  71         done=0,
  72         state="running",
  73     )
  74     progress_bar.save()
  75 
  76     counter = 0
  77     interval = 100
  78     for artifact in artifacts_to_delete.iterator():
  79         # we need to manually call delete() because it cleans up the file on the filesystem
  80         artifact.delete()
  81         progress_bar.done += 1
  82         counter += 1
  83 
  84         if counter >= interval:
  85             progress_bar.save()
  86             counter = 0
  87 
  88     progress_bar.state = "completed"
  89     progress_bar.save()
  90
  [end of pulpcore/app/tasks/reclaim_space.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/pulpcore/app/tasks/reclaim_space.py b/pulpcore/app/tasks/reclaim_space.py
  --- a/pulpcore/app/tasks/reclaim_space.py
  +++ b/pulpcore/app/tasks/reclaim_space.py
  @@ -1,3 +1,7 @@
  +from logging import getLogger
  +
  +from django.db.models.deletion import ProtectedError
  +
   from pulpcore.app.models import (
       Artifact,
       Content,
  @@ -9,6 +13,8 @@
   )
   from pulpcore.app.util import get_domain
   
  +log = getLogger(__name__)
  +
   
   def reclaim_space(repo_pks, keeplist_rv_pks=None, force=False):
       """
  @@ -76,10 +82,16 @@
       counter = 0
       interval = 100
       for artifact in artifacts_to_delete.iterator():
  -        # we need to manually call delete() because it cleans up the file on the filesystem
  -        artifact.delete()
  -        progress_bar.done += 1
  -        counter += 1
  +        try:
  +            # we need to manually call delete() because it cleans up the file on the filesystem
  +            artifact.delete()
  +        except ProtectedError as e:
  +            # Rarely artifact could be shared between to different content units.
  +            # Just log and skip the artifact deletion in this case
  +            log.info(e)
  +        else:
  +            progress_bar.done += 1
  +            counter += 1
   
           if counter >= interval:
               progress_bar.save()
  
verification_info: {"golden_diff": "diff --git a/pulpcore/app/tasks/reclaim_space.py b/pulpcore/app/tasks/reclaim_space.py\n--- a/pulpcore/app/tasks/reclaim_space.py\n+++ b/pulpcore/app/tasks/reclaim_space.py\n@@ -1,3 +1,7 @@\n+from logging import getLogger\n+\n+from django.db.models.deletion import ProtectedError\n+\n from pulpcore.app.models import (\n     Artifact,\n     Content,\n@@ -9,6 +13,8 @@\n )\n from pulpcore.app.util import get_domain\n \n+log = getLogger(__name__)\n+\n \n def reclaim_space(repo_pks, keeplist_rv_pks=None, force=False):\n     \"\"\"\n@@ -76,10 +82,16 @@\n     counter = 0\n     interval = 100\n     for artifact in artifacts_to_delete.iterator():\n-        # we need to manually call delete() because it cleans up the file on the filesystem\n-        artifact.delete()\n-        progress_bar.done += 1\n-        counter += 1\n+        try:\n+            # we need to manually call delete() because it cleans up the file on the filesystem\n+            artifact.delete()\n+        except ProtectedError as e:\n+            # Rarely artifact could be shared between to different content units.\n+            # Just log and skip the artifact deletion in this case\n+            log.info(e)\n+        else:\n+            progress_bar.done += 1\n+            counter += 1\n \n         if counter >= interval:\n             progress_bar.save()\n", "issue": "Reclaim space for repository fails with Cannot delete some instances of model 'Artifact' because they are referenced through protected foreign keys: 'ContentArtifact.artifact'.\"\n**Version**\r\n3.16, but probably all versions\r\n\r\n**Describe the bug**\r\n\r\n- Reclaim space for repository fails with the following error.\r\n\r\n  ~~~\r\n  Task paused with error: \"(\"Cannot delete some instances of model 'Artifact' because they are referenced through protected foreign keys: 'ContentArtifact.artifact'.\", {<ContentArtifact: pk=452959ad-c045-4e85-bf9f-6651ba37f57d>})\"\r\n  ~~~\r\n\r\n**To Reproduce**\r\nSee BZ\r\n\r\n**Additional context**\r\nhttps://bugzilla.redhat.com/show_bug.cgi?id=2169322\r\n\n", "before_files": [{"content": "from pulpcore.app.models import (\n    Artifact,\n    Content,\n    ContentArtifact,\n    ProgressReport,\n    PublishedMetadata,\n    Repository,\n    RepositoryVersion,\n)\nfrom pulpcore.app.util import get_domain\n\n\ndef reclaim_space(repo_pks, keeplist_rv_pks=None, force=False):\n    \"\"\"\n    This task frees-up disk space by removing Artifact files from the filesystem for Content\n    exclusive to the list of provided repos.\n\n    Note: content marked as `proctected` will be excluded from the reclaim disk space.\n\n    Kwargs:\n        repo_pks (list): A list of repo pks the disk reclaim space is performed on.\n        keeplist_rv_pks (list): A list of repo version pks that will be excluded from the reclaim\n        disk space.\n        force (bool): If True, uploaded content will be taken into account.\n\n    \"\"\"\n    reclaimed_repos = Repository.objects.filter(pk__in=repo_pks)\n    for repo in reclaimed_repos:\n        repo.invalidate_cache(everything=True)\n\n    domain = get_domain()\n    rest_of_repos = Repository.objects.filter(pulp_domain=domain).exclude(pk__in=repo_pks)\n    c_keep_qs = Content.objects.filter(repositories__in=rest_of_repos)\n    c_reclaim_qs = Content.objects.filter(repositories__in=repo_pks)\n    c_reclaim_qs = c_reclaim_qs.exclude(\n        pk__in=c_keep_qs, pulp_type=PublishedMetadata.get_pulp_type()\n    )\n\n    if keeplist_rv_pks:\n        rv_qs = RepositoryVersion.objects.filter(pk__in=keeplist_rv_pks)\n        rv_content = Content.objects.none()\n        for rv in rv_qs.iterator():\n            rv_content |= rv.content\n        c_reclaim_qs = c_reclaim_qs.exclude(pk__in=rv_content)\n\n    content_distinct = c_reclaim_qs.distinct(\"pulp_type\")\n    unprotected = []\n    for content in content_distinct:\n        if not content.cast().PROTECTED_FROM_RECLAIM:\n            unprotected.append(content.pulp_type)\n\n    ca_qs = ContentArtifact.objects.select_related(\"content\", \"artifact\").filter(\n        content__in=c_reclaim_qs.values(\"pk\"), artifact__isnull=False\n    )\n    if not force:\n        ca_qs = ca_qs.filter(remoteartifact__isnull=False)\n    artifact_pks = set()\n    ca_to_update = []\n    for ca in ca_qs.iterator():\n        if ca.content.pulp_type in unprotected:\n            artifact_pks.add(ca.artifact.pk)\n            ca.artifact = None\n            ca_to_update.append(ca)\n\n    ContentArtifact.objects.bulk_update(objs=ca_to_update, fields=[\"artifact\"], batch_size=1000)\n    artifacts_to_delete = Artifact.objects.filter(pk__in=artifact_pks)\n    progress_bar = ProgressReport(\n        message=\"Reclaim disk space\",\n        total=artifacts_to_delete.count(),\n        code=\"reclaim-space.artifact\",\n        done=0,\n        state=\"running\",\n    )\n    progress_bar.save()\n\n    counter = 0\n    interval = 100\n    for artifact in artifacts_to_delete.iterator():\n        # we need to manually call delete() because it cleans up the file on the filesystem\n        artifact.delete()\n        progress_bar.done += 1\n        counter += 1\n\n        if counter >= interval:\n            progress_bar.save()\n            counter = 0\n\n    progress_bar.state = \"completed\"\n    progress_bar.save()\n", "path": "pulpcore/app/tasks/reclaim_space.py"}]}