lister.cli: Insert optional flag to permit post insert data

That's needed for example for having the minimum necessary to make the
debian lister run.

swh/lister/cli.py

@@ -21,12 +21,16 @@ SUPPORTED_LISTERS = ['github', 'gitlab', 'bitbucket', 'debian']
               help='create tables')
 @click.option('--drop-tables', is_flag=True, default=False,
               help='Drop tables')
-def cli(db_url, lister, create_tables, drop_tables):
+@click.option('--with-data', is_flag=True, default=False,
+              help='Insert minimum required data')
+def cli(db_url, lister, create_tables, drop_tables, with_data):
     """Initialize db model according to lister.
 
     """
     override_conf = {'lister_db_url': db_url}
 
+    insert_minimum_data = None
+
     if lister == 'github':
         from .github.models import IndexingModelBase as ModelBase
         from .github.lister import GitHubLister
@@ -49,6 +53,24 @@ def cli(db_url, lister, create_tables, drop_tables):
         ModelBase = DebianLister.MODEL
         _lister = DebianLister()
 
+        def insert_minimum_data(lister):
+            from swh.storage.schemata.distribution import Distribution, Area
+            d = Distribution(
+                name='Debian',
+                type='deb',
+                mirror_uri='http://deb.debian.org/debian/')
+            lister.db_session.add(d)
+
+            areas = []
+            for distribution_name in ['stretch']:
+                for area_name in ['main', 'contrib', 'non-free']:
+                    areas.append(Area(
+                        name='%s/%s' % (distribution_name, area_name),
+                        distribution=d,
+                    ))
+            lister.db_session.add_all(areas)
+            lister.db_session.commit()
+
     else:
         raise ValueError('Only supported listers are %s' % SUPPORTED_LISTERS)
 
@@ -58,6 +80,9 @@ def cli(db_url, lister, create_tables, drop_tables):
     if create_tables:
         ModelBase.metadata.create_all(_lister.db_engine)
 
+        if with_data and insert_minimum_data:
+            insert_minimum_data(_lister)
+
 
 if __name__ == '__main__':
     cli()