Closes #11890: Sync/upload reports & scripts (#12059)

* Initial work on #11890

* Consolidate get_scripts() and get_reports() functions

* Introduce proxy models for script & report modules

* Add add/delete views for reports & scripts

* Add deletion links for modules

* Enable resolving scripts/reports from module class

* Remove get_modules() utility function

* Show results in report/script lists

* Misc cleanup

* Fix file uploads

* Support automatic migration for submodules

* Fix module child ordering

* Template cleanup

* Remove ManagedFile views

* Move is_script(), is_report() into extras.utils

* Fix URLs for nested reports & scripts

* Misc cleanup

netbox/extras/migrations/0091_create_managedfiles.py

@@ -0,0 +1,86 @@
+import os
+import pkgutil
+
+from django.conf import settings
+from django.db import migrations, models
+import extras.models.models
+
+
+def create_files(cls, root_name, root_path):
+
+    path_tree = [
+        path for path, _, _ in os.walk(root_path)
+        if os.path.basename(path)[0] not in ('_', '.')
+    ]
+
+    modules = list(pkgutil.iter_modules(path_tree))
+    filenames = []
+    for importer, module_name, is_pkg in modules:
+        if is_pkg:
+            continue
+        try:
+            module = importer.find_module(module_name).load_module(module_name)
+            rel_path = os.path.relpath(module.__file__, root_path)
+            filenames.append(rel_path)
+        except ImportError:
+            pass
+
+    managed_files = [
+        cls(file_root=root_name, file_path=filename)
+        for filename in filenames
+    ]
+    cls.objects.bulk_create(managed_files)
+
+
+def replicate_scripts(apps, schema_editor):
+    ScriptModule = apps.get_model('extras', 'ScriptModule')
+    create_files(ScriptModule, 'scripts', settings.SCRIPTS_ROOT)
+
+
+def replicate_reports(apps, schema_editor):
+    ReportModule = apps.get_model('extras', 'ReportModule')
+    create_files(ReportModule, 'reports', settings.REPORTS_ROOT)
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0002_managedfile'),
+        ('extras', '0090_objectchange_index_request_id'),
+    ]
+
+    operations = [
+        # Create proxy models
+        migrations.CreateModel(
+            name='ReportModule',
+            fields=[
+            ],
+            options={
+                'proxy': True,
+                'indexes': [],
+                'constraints': [],
+            },
+            bases=(extras.models.models.PythonModuleMixin, 'core.managedfile', models.Model),
+        ),
+        migrations.CreateModel(
+            name='ScriptModule',
+            fields=[
+            ],
+            options={
+                'proxy': True,
+                'indexes': [],
+                'constraints': [],
+            },
+            bases=(extras.models.models.PythonModuleMixin, 'core.managedfile', models.Model),
+        ),
+
+        # Instantiate ManagedFiles to represent scripts & reports
+        migrations.RunPython(
+            code=replicate_scripts,
+            reverse_code=migrations.RunPython.noop
+        ),
+        migrations.RunPython(
+            code=replicate_reports,
+            reverse_code=migrations.RunPython.noop
+        ),
+    ]