Add custom report template tags

InvenTree/part/templatetags/report.py

@@ -0,0 +1,22 @@
+"""
+Custom template tags for report generation
+"""
+
+import os
+
+from django import template
+from django.conf import settings
+
+register = template.Library()
+
+
+@register.simple_tag()
+def asset(filename):
+    """
+    Return fully-qualified path for an upload report asset file.
+    """
+
+    path = os.path.join(settings.MEDIA_ROOT, 'report', 'assets', filename)
+    path = os.path.abspath(path)
+
+    return f"file://{path}"