Remove dependencies, add meta packages

migrations/versions/900758871713_.py

@@ -0,0 +1,57 @@
+"""empty message
+
+Revision ID: 900758871713
+Revises: ea5a023711e0
+Create Date: 2018-05-27 16:36:44.258935
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '900758871713'
+down_revision = 'ea5a023711e0'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('meta_package',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('name', sa.String(length=100), nullable=False),
+        sa.PrimaryKeyConstraint('id'),
+        sa.UniqueConstraint('name')
+    )
+    op.create_table('provides',
+        sa.Column('package_id', sa.Integer(), nullable=False),
+        sa.Column('metapackage_id', sa.Integer(), nullable=False),
+        sa.ForeignKeyConstraint(['metapackage_id'], ['meta_package.id'], ),
+        sa.ForeignKeyConstraint(['package_id'], ['package.id'], ),
+        sa.PrimaryKeyConstraint('package_id', 'metapackage_id')
+    )
+    op.drop_table('harddeps')
+    op.drop_table('softdeps')
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('softdeps',
+        sa.Column('package_id', sa.INTEGER(), nullable=False),
+        sa.Column('dependency_id', sa.INTEGER(), nullable=False),
+        sa.ForeignKeyConstraint(['dependency_id'], ['package.id'], ),
+        sa.ForeignKeyConstraint(['package_id'], ['package.id'], ),
+        sa.PrimaryKeyConstraint('package_id', 'dependency_id')
+    )
+    op.create_table('harddeps',
+        sa.Column('package_id', sa.INTEGER(), nullable=False),
+        sa.Column('dependency_id', sa.INTEGER(), nullable=False),
+        sa.ForeignKeyConstraint(['dependency_id'], ['package.id'], ),
+        sa.ForeignKeyConstraint(['package_id'], ['package.id'], ),
+        sa.PrimaryKeyConstraint('package_id', 'dependency_id')
+    )
+    op.drop_table('provides')
+    op.drop_table('meta_package')
+    # ### end Alembic commands ###