Remove submodule, just put Dependencies in ./libs

libs/migrate/changeset/databases/postgres.py

@@ -0,0 +1,46 @@
+"""
+   `PostgreSQL`_ database specific implementations of changeset classes.
+
+   .. _`PostgreSQL`: http://www.postgresql.org/
+"""
+from migrate.changeset import ansisql, SQLA_06
+
+if not SQLA_06:
+    from sqlalchemy.databases import postgres as sa_base
+    PGSchemaGenerator = sa_base.PGSchemaGenerator
+else:
+    from sqlalchemy.databases import postgresql as sa_base
+    PGSchemaGenerator = sa_base.PGDDLCompiler
+
+
+class PGColumnGenerator(PGSchemaGenerator, ansisql.ANSIColumnGenerator):
+    """PostgreSQL column generator implementation."""
+    pass
+
+
+class PGColumnDropper(ansisql.ANSIColumnDropper):
+    """PostgreSQL column dropper implementation."""
+    pass
+
+
+class PGSchemaChanger(ansisql.ANSISchemaChanger):
+    """PostgreSQL schema changer implementation."""
+    pass
+
+
+class PGConstraintGenerator(ansisql.ANSIConstraintGenerator):
+    """PostgreSQL constraint generator implementation."""
+    pass
+
+
+class PGConstraintDropper(ansisql.ANSIConstraintDropper):
+    """PostgreSQL constaint dropper implementation."""
+    pass
+
+
+class PGDialect(ansisql.ANSIDialect):
+    columngenerator = PGColumnGenerator
+    columndropper = PGColumnDropper
+    schemachanger = PGSchemaChanger
+    constraintgenerator = PGConstraintGenerator
+    constraintdropper = PGConstraintDropper