feat: create validated ZUGFeRD invoices in one console command

jr_einvoice/pipeline.py

@@ -1,5 +1,7 @@
 from __future__ import annotations
 from pathlib import Path
+import re
+import shutil
 from dataclasses import dataclass
 from typing import Optional
 
@@ -37,6 +39,12 @@ def build_in_folder(
     out_dir = invoice_dir / out_subdir
     (out_dir / "logs").mkdir(parents=True, exist_ok=True)
 
+    attachment = invoice_dir / ('Rechnung_' + re.sub(r'[^A-Za-z0-9_-]', '_', inv.meta.invoice_number) + '.pdf')
+    # A new build invalidates old delivery drafts and prior validation results.
+    for stale in [attachment, out_dir / "invoice.eml", out_dir / "manifest.json",
+                  out_dir / "invoice.facturx.pdf", out_dir / "validation/validate_report.xml"]:
+        stale.unlink(missing_ok=True)
+
     logger.info("Loaded invoice: %s (folder=%s)", inv.meta.invoice_number, invoice_dir)
     logger.info("Artifacts directory: %s", out_dir)
 
@@ -62,6 +70,12 @@ def build_in_folder(
     if do_validate:
         logger.info("Validating Factur-X PDF via Mustang")
         report = out_dir / "validation" / "validate_report.xml"
-        result.validate_report = validate(mustang_jar, result.facturx_pdf or (out_dir / "invoice.facturx.pdf"), report, logger)
+        try:
+            result.validate_report = validate(mustang_jar, result.facturx_pdf, report, logger)
+        except Exception:
+            # Failed output must not be mistaken for a ready-to-send invoice.
+            result.facturx_pdf.unlink(missing_ok=True)
+            raise
+        shutil.copy2(result.facturx_pdf, attachment)
 
     return result