Backport i18n string + code for bookworm migration

locales/en.json

@@ -591,6 +591,20 @@
     "migration_0024_rebuild_python_venv_disclaimer_rebuild": "Rebuilding the virtualenv will be attempted for the following apps (NB: the operation may take some time!): {rebuild_apps}",
     "migration_0024_rebuild_python_venv_failed": "Failed to rebuild the Python virtualenv for {app}. The app may not work as long as this is not resolved. You should fix the situation by forcing the upgrade of this app using `yunohost app upgrade --force {app}`.",
     "migration_0024_rebuild_python_venv_in_progress": "Now attempting to rebuild the Python virtualenv for `{app}`",
+    "migration_description_0027_migrate_to_bookworm": "Upgrade the system to Debian Bookworm and YunoHost 12",
+    "migration_0027_cleaning_up": "Cleaning up cache and packages not useful anymore…",
+    "migration_0027_general_warning": "Please note that this migration is a delicate operation. The YunoHost team did its best to review and test it, but the migration might still break parts of the system or its apps.\n\nTherefore, it is recommended to:\n    - Perform a backup of any critical data or app. More info on https://yunohost.org/backup;\n    - Be patient after launching the migration: Depending on your Internet connection and hardware, it might take up to a few hours for everything to upgrade.",
+    "migration_0027_main_upgrade": "Starting main upgrade…",
+    "migration_0027_modified_files": "Please note that the following files were found to be manually modified and might be overwritten following the upgrade: {manually_modified_files}",
+    "migration_0027_not_bullseye": "The current Debian distribution is not Bullseye! If you already ran the Bullseye->Bookworm migration, then this error is symptomatic of the fact that the migration procedure was not 100% succesful (otherwise YunoHost would have flagged it as completed). It is recommended to investigate what happened with the support team, who will need the **full** log of the `migration, which can be found in Tools > Logs in the webadmin.",
+    "migration_0027_not_enough_free_space": "Free space is pretty low in /var/! You should have at least 1GB free to run this migration.",
+    "migration_0027_patch_yunohost_conflicts": "Applying patch to workaround conflict issue…",
+    "migration_0027_patching_sources_list": "Patching the sources.lists…",
+    "migration_0027_problematic_apps_warning": "Please note that the following possibly problematic installed apps were detected. It looks like those were not installed from the YunoHost app catalog, or are not flagged as 'working'. Consequently, it cannot be guaranteed that they will still work after the upgrade: {problematic_apps}",
+    "migration_0027_start": "Starting migration to Bullseye",
+    "migration_0027_still_on_bullseye_after_main_upgrade": "Something went wrong during the main upgrade, the system appears to still be on Debian Bullseye",
+    "migration_0027_system_not_fully_up_to_date": "Your system is not fully up-to-date. Please perform a regular upgrade before running the migration to Bullseye.",
+    "migration_0027_yunohost_upgrade": "Starting YunoHost core upgrade…",
     "migration_description_0021_migrate_to_bullseye": "Upgrade the system to Debian Bullseye and YunoHost 11.x",
     "migration_description_0022_php73_to_php74_pools": "Migrate php7.3-fpm 'pool' conf files to php7.4",
     "migration_description_0023_postgresql_11_to_13": "Migrate databases from PostgreSQL 11 to 13",

src/migrations/0027_migrate_to_bookworm.py

@@ -181,7 +181,7 @@ class MyMigration(Migration):
         aptitude_with_progress_bar("full-upgrade --show-why -y -o Dpkg::Options::='--force-confold'")
 
         if self.debian_major_version() == N_CURRENT_DEBIAN:
-            raise YunohostError("migration_0027_still_on_buster_after_main_upgrade")
+            raise YunohostError("migration_0027_still_on_bullseye_after_main_upgrade")
 
         # Clean the mess
         logger.info(m18n.n("migration_0027_cleaning_up"))