[IMP] account : new report 'duplicata' for an invoice

addons/account/views/account_report.xml

@@ -13,5 +13,15 @@
             attachment="(object.state in ('open','paid')) and ('INV'+(object.number or '').replace('/','')+'.pdf')"
         />
 
+        <report 
+            id="account_invoice_action_report_duplicate"
+            model="account.invoice"
+            string="Duplicates"
+            report_type="qweb-pdf"
+            name="account.account_invoice_report_duplicate_main"
+            file="account.report_invoice_duplicate"
+            attachment_use="False"
+        />
+
     </data>
 </openerp>

addons/account/views/report_invoice.xml

@@ -157,5 +157,22 @@
         </t>
     </t>
 </template>
+
+<template id="account_invoice_report_duplicate" inherit_id="account.report_invoice_document" primary="True">
+    <xpath expr="//h2" position="replace">
+        <h2>
+            <span>Duplicate</span>
+            <span t-field="o.number"/>
+        </h2>
+    </xpath>
+</template>
+
+<template id="account_invoice_report_duplicate_main">
+    <t t-call="report.html_container">
+        <t t-foreach="doc_ids" t-as="doc_id">
+            <t t-raw="translate_doc(doc_id, doc_model, 'partner_id.lang', 'account.account_invoice_report_duplicate')"/>
+        </t>
+    </t>
+</template>
 </data>
 </openerp>