check-database-compatibility: Ignore squashed and renamed migrations.

Fixes: #21596.

scripts/lib/check-database-compatibility.py

@@ -28,6 +28,45 @@ missing.discard(("guardian", "0001_initial"))
 missing.discard(("sites", "0001_initial"))
 missing.discard(("sites", "0002_alter_domain_unique"))
 
+# These migrations were squashed into 0001, in 6fbddf578a6e through
+# a21f2d771553, 1.7.0~3135.
+missing.difference_update(
+    [
+        ("zerver", "0002_django_1_8"),
+        ("zerver", "0003_custom_indexes"),
+        ("zerver", "0004_userprofile_left_side_userlist"),
+        ("zerver", "0005_auto_20150920_1340"),
+        ("zerver", "0006_zerver_userprofile_email_upper_idx"),
+        ("zerver", "0007_userprofile_is_bot_active_indexes"),
+        ("zerver", "0008_preregistrationuser_upper_email_idx"),
+        ("zerver", "0009_add_missing_migrations"),
+        ("zerver", "0010_delete_streamcolor"),
+        ("zerver", "0011_remove_guardian"),
+        ("zerver", "0012_remove_appledevicetoken"),
+        ("zerver", "0013_realmemoji"),
+        ("zerver", "0014_realm_emoji_url_length"),
+        ("zerver", "0015_attachment"),
+        ("zerver", "0016_realm_create_stream_by_admins_only"),
+        ("zerver", "0017_userprofile_bot_type"),
+        ("zerver", "0018_realm_emoji_message"),
+        ("zerver", "0019_preregistrationuser_realm_creation"),
+        ("zerver", "0020_add_tracking_attachment"),
+        ("zerver", "0021_migrate_attachment_data"),
+        ("zerver", "0022_subscription_pin_to_top"),
+        ("zerver", "0023_userprofile_default_language"),
+        ("zerver", "0024_realm_allow_message_editing"),
+        ("zerver", "0025_realm_message_content_edit_limit"),
+        ("zerver", "0026_delete_mituser"),
+        ("zerver", "0027_realm_default_language"),
+        ("zerver", "0028_userprofile_tos_version"),
+    ]
+)
+
+# This migration was in python-social-auth, and was mistakenly removed
+# from its `replaces` in
+# https://github.com/python-social-auth/social-app-django/pull/25
+missing.discard(("default", "0005_auto_20160727_2333"))
+
 for key, migration in loader.disk_migrations.items():
     missing.discard(key)
     missing.difference_update(migration.replaces)