def _start_metadirs(exclude=None):
""" Builds and returns all metadirs. exclude is the exclude_method
optionally needed by the MetadirController constructor.
"""
metadirs = []
for project, project_attrs in config['projects'].iteritems():
# For each project, verify if the .baboon metadir is valid and
# take some decisions about needed actions on the repository.
metadir = MetadirController(project, project_attrs['path'], exclude)
metadirs.append(metadir)
metadir.go()
return metadirs
