* [fix] Mount bind readonly not really readonly
* Attempt to clarify and fix some issues with the readonly mount
* Fix some missing messages and exception handling
* Get rid of horrible bash command
* Use subproces.check_call to avoid security hazard
* Revert comment about hard link
* Add test that mount binds are readonly
* [enh] list migrations
* [enh] first version of the migrate command
* [mod] add todo comment
* [mod] migrate command shouldn't return anything
* [mod] rename yunohost_migrations to data_migrations
* [mod] better regex
* [enh] had base class for migration
* [fix] inverted condition
* [enh] save last runned migration
* [enh] add migrations state command
* [mod] add todo comments
* [mod] error handling
* [mod] DRY
* [doc] more comment
* [enh] handle exceptions on migration
* [mod] error handling
* [mod] DRY
* [enh] error handling
* [mod] this is done earlier
* [doc] docstring
* [enh] handle fail to load migration case
* [doc] add TODO Comment
* [fix] typos, thx ju
* [enh] add a migration to remove archivemount (as an example)
* [fix] check_call is boring
* [enh] support forward/backward migrations
* [mod] I don't need auth
* [fix] apt is expecting input...
* [mod] save it as int
* [mod] add some logging
* [doc] update todo
* [fix] I also need to run backward latest runed migration
* [enh] add target cli argument
* [enh] fake migration
* [enh] uniformly convert to int at the same place
* [fix] we need to filename now
* [enh] validate input
* [enh] handle 0 special case
* [mod] rename fake to skip
* [mod] s/runed/run/g
* [doc] anglich typo in comments
* [mod] more explicit error message
* [mod] more typo
* [doc] put comment in the right place
* [mod] typo
* [fix] forgot to cape migrations by target
* [fix] typo
* [mod] uses moulinette helpers
* [enh] launch migrations during package upgrade
* [mod] remove unused import
* [mod] sort translation keys
* [enh] i18n
* [fix] missing __init__.py in data_migrations
* [mod] move to a subcategory
* Typo / caps / consistency
* [fix] forgot that migrations is now in tools, in postinst
* Skip migrations during postinstall
* Remove archivemount example migration
It relied on apt-get, which can't be used during 'postinst' debian scripts because we're already inside a apt
* Add migration for cert group from 'metronome' to 'ssl-cert'
* New helpers ynh_add_systemd_config and ynh_remove_systemd_config
Standard file for systemd service.
* ynh_subsistute_char was renamed ynh_replace_string
* Upgrade helpers
* Add some description of which keywords are replaced by which variable
* New helpers ynh_add_nginx_config and ynh_remove_nginx_config
Standard configuration of nginx
Use local files stored in conf/, so it's still possible to use a specific config
* ynh_substitute_char was renamed ynh_replace_string
* ynh_compare_checksum_config -> ynh_backup_if_checksum_is_different
* Upgrade helpers
* Add some description of which keywords are replaced by which variable
* New helpers ynh_backup_after_failed_upgrade and ynh_backup_before_upgrade
Create a backup at the beginning of upgrade script.
Then, if the upgrade script failed, remove the app and restore it.
The backup is kept, to provide a way to restore if the upgrade is finally a bad thing.
* Implement @JimboJoe's comments
* Indentation
* --ignore-hooks -> --ignore-system
