Error with alembic and initializedb when the script is lauch from a child application

[miniwark]

If the initialize_db script is used by an extended application, he did not correctly check the alembic version of the database.

(env)miniwark@lazaret:/home/miniwark/anuket/begotemp# initialize_anuket_db development.ini 
2012-11-12 17:29:14,199 INFO  [sqlalchemy.engine.base.Engine][MainThread] select version()
2012-11-12 17:29:14,199 INFO  [sqlalchemy.engine.base.Engine][MainThread] {}
2012-11-12 17:29:14,201 INFO  [sqlalchemy.engine.base.Engine][MainThread] select current_schema()
2012-11-12 17:29:14,201 INFO  [sqlalchemy.engine.base.Engine][MainThread] {}
2012-11-12 17:29:14,205 INFO  [sqlalchemy.engine.base.Engine][MainThread] BEGIN (implicit)
2012-11-12 17:29:14,206 INFO  [sqlalchemy.engine.base.Engine][MainThread] select relname from pg_class c join pg_namespace n on n.oid=c.relnamespace where n.nspname=current_schema() and relname=%(name)s
2012-11-12 17:29:14,206 INFO  [sqlalchemy.engine.base.Engine][MainThread] {'name': u'alembic_version'}
2012-11-12 17:29:14,209 INFO  [sqlalchemy.engine.base.Engine][MainThread] 
CREATE TABLE alembic_version (
        version_num VARCHAR(32) NOT NULL
)

2012-11-12 17:29:14,209 INFO  [sqlalchemy.engine.base.Engine][MainThread] {}
2012-11-12 17:29:14,211 INFO  [sqlalchemy.engine.base.Engine][MainThread] SELECT alembic_version.version_num 
FROM alembic_version
2012-11-12 17:29:14,212 INFO  [sqlalchemy.engine.base.Engine][MainThread] {}
2012-11-12 17:29:14,213 INFO  [sqlalchemy.engine.base.Engine][MainThread] select relname from pg_class c join pg_namespace n on n.oid=c.relnamespace where n.nspname=current_schema() and relname=%(name)s
2012-11-12 17:29:14,213 INFO  [sqlalchemy.engine.base.Engine][MainThread] {'name': u'alembic_version'}
2012-11-12 17:29:14,215 INFO  [sqlalchemy.engine.base.Engine][MainThread] SELECT alembic_version.version_num 
FROM alembic_version
2012-11-12 17:29:14,215 INFO  [sqlalchemy.engine.base.Engine][MainThread] {}
2012-11-12 17:29:14,216 INFO  [sqlalchemy.engine.base.Engine][MainThread] ROLLBACK
Traceback (most recent call last):
  File "/home/miniwark/anuket/env/bin/initialize_anuket_db", line 9, in 
    load_entry_point('anuket==0.6a', 'console_scripts', 'initialize_anuket_db')()
  File "/home/miniwark/anuket/anuket/anuket/scripts/initializedb.py", line 23, in main
    return command.run()
  File "/home/miniwark/anuket/anuket/anuket/scripts/initializedb.py", line 56, in run
    return self.initialize_db()
  File "/home/miniwark/anuket/anuket/anuket/scripts/initializedb.py", line 100, in initialize_db
    stamp(alembic_cfg, 'head')
  File "/home/miniwark/anuket/env/local/lib/python2.7/site-packages/alembic/command.py", line 212, in stamp
    script.run_env()
  File "/home/miniwark/anuket/env/local/lib/python2.7/site-packages/alembic/script.py", line 191, in run_env
    util.load_python_file(self.dir, 'env.py')
  File "/home/miniwark/anuket/env/local/lib/python2.7/site-packages/alembic/util.py", line 185, in load_python_file
    module = imp.load_source(module_id, path, open(path, 'rb'))
  File "/home/miniwark/anuket/begotemp/begotemp/scripts/alembic/env.py", line 70, in 
    run_migrations_online()
  File "/home/miniwark/anuket/begotemp/begotemp/scripts/alembic/env.py", line 63, in run_migrations_online
    context.run_migrations()
  File "", line 7, in run_migrations
  File "/home/miniwark/anuket/env/local/lib/python2.7/site-packages/alembic/environment.py", line 494, in run_migrations
    self.get_context().run_migrations(**kw)
  File "/home/miniwark/anuket/env/local/lib/python2.7/site-packages/alembic/migration.py", line 200, in run_migrations
    self):
  File "/home/miniwark/anuket/env/local/lib/python2.7/site-packages/alembic/command.py", line 199, in do_stamp
    dest = script.get_revision(revision)
  File "/home/miniwark/anuket/env/local/lib/python2.7/site-packages/alembic/script.py", line 90, in get_revision
    id_ = self.as_revision_number(id_)
  File "/home/miniwark/anuket/env/local/lib/python2.7/site-packages/alembic/script.py", line 116, in as_revision_number
    id_ = self.get_current_head()
  File "/home/miniwark/anuket/env/local/lib/python2.7/site-packages/alembic/script.py", line 245, in get_current_head
    current_heads = self.get_heads()
  File "/home/miniwark/anuket/env/local/lib/python2.7/site-packages/alembic/script.py", line 269, in get_heads
    for script in self._revision_map.values():
  File "/home/miniwark/anuket/env/local/lib/python2.7/site-packages/alembic/util.py", line 219, in __get__
    obj.__dict__[self.__name__] = result = self.fget(obj)
  File "/home/miniwark/anuket/env/local/lib/python2.7/site-packages/alembic/script.py", line 200, in _revision_map
    for file_ in os.listdir(self.versions):
OSError: [Errno 2] No such file or directory: '/home/miniwark/anuket/begotemp/begotemp/scripts/alembic/versions'