initial work on fixing user exports with s3

- custom storages
- tar.gz within bucket using s3_tar
- slightly changes export directory structure
- major problems still outstanding re delivering s3 files to end users

bookwyrm/migrations/0192_auto_20240114_0055.py

@@ -0,0 +1,53 @@
+# Generated by Django 3.2.23 on 2024-01-14 00:55
+
+import bookwyrm.storage_backends
+import django.core.serializers.json
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('bookwyrm', '0191_merge_20240102_0326'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='bookwyrmexportjob',
+            name='export_json',
+            field=models.JSONField(encoder=django.core.serializers.json.DjangoJSONEncoder, null=True),
+        ),
+        migrations.AddField(
+            model_name='bookwyrmexportjob',
+            name='json_completed',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AlterField(
+            model_name='bookwyrmexportjob',
+            name='export_data',
+            field=models.FileField(null=True, storage=bookwyrm.storage_backends.ExportsFileStorage, upload_to=''),
+        ),
+        migrations.CreateModel(
+            name='AddFileToTar',
+            fields=[
+                ('childjob_ptr', models.OneToOneField(auto_created=True, on_delete=django.db.models.deletion.CASCADE, parent_link=True, primary_key=True, serialize=False, to='bookwyrm.childjob')),
+                ('parent_export_job', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='child_edition_export_jobs', to='bookwyrm.bookwyrmexportjob')),
+            ],
+            options={
+                'abstract': False,
+            },
+            bases=('bookwyrm.childjob',),
+        ),
+        migrations.CreateModel(
+            name='AddBookToUserExportJob',
+            fields=[
+                ('childjob_ptr', models.OneToOneField(auto_created=True, on_delete=django.db.models.deletion.CASCADE, parent_link=True, primary_key=True, serialize=False, to='bookwyrm.childjob')),
+                ('edition', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='bookwyrm.edition')),
+            ],
+            options={
+                'abstract': False,
+            },
+            bases=('bookwyrm.childjob',),
+        ),
+    ]