Log Message:
py-alembic: updated to 1.2.1

1.2.1

bug

[bug] [command]

Reverted the name change of the “revisions” argument to command.stamp() to \ 
“revision” as apparently applications are calling upon this argument as a \ 
keyword name. Pull request courtesy Thomas Bechtold. Special translations are \ 
also added to the command line interface so that it is still known as \ 
“revisions” in the CLI.

[bug] [tests]

Removed the “test requirements” from “setup.py test”, as this command \ 
now only emits a removal error in any case and these requirements are unused.

1.2.0

feature

[feature] [command]

Added new --purge flag to the alembic stamp command, which will unconditionally \ 
erase the version table before stamping anything. This is useful for development \ 
where non-existent version identifiers might be left within the table. \ 
Additionally, alembic.stamp now supports a list of revision identifiers, which \ 
are intended to allow setting up muliple heads at once. Overall handling of \ 
version identifiers within the alembic.stamp command has been improved with many \ 
new tests and use cases added.

[feature] [runtime]

Added new feature MigrationContext.autocommit_block(), a special directive which \ 
will provide for a non-transactional block inside of a migration script. The \ 
feature requres that: the database driver (e.g. DBAPI) supports the AUTOCOMMIT \ 
isolation mode. The directive also necessarily needs to COMMIT the existing \ 
transaction in progress in order to enter autocommit mode.

[feature] [commands]

Added “post write hooks” to revision generation. These allow custom logic to \ 
run after a revision Python script is generated, typically for the purpose of \ 
running code formatters such as “Black” or “autopep8”, but may be used \ 
for any arbitrary post-render hook as well, including custom Python functions or \ 
scripts. The hooks are enabled by providing a [post_write_hooks] section in the \ 
alembic.ini file. A single hook is provided which runs an arbitrary Python \ 
executable on the newly generated revision script, which can be configured to \ 
run code formatters such as Black; full examples are included in the \ 
documentation.

[feature] [environment]

Added new flag --package to alembic init. For environments where the Alembic \ 
migration files and such are within the package tree and importable as modules, \ 
this flag can be specified which will add the additional __init__.py files in \ 
the version location and the environment location.