Initial import from Docker volume

modules/project_invoice/__init__.py

@@ -0,0 +1,18 @@
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+
+from trytond.pool import Pool
+
+from . import invoice, project, timesheet
+
+
+def register():
+    Pool.register(
+        project.Work,
+        project.WorkInvoicedProgress,
+        timesheet.Line,
+        invoice.InvoiceLine,
+        module='project_invoice', type_='model')
+    Pool.register(
+        project.OpenInvoice,
+        module='project_invoice', type_='wizard')