[Certificate] Minor improvements on the certificate generation script

courses/certification/management/commands/generate_coursecertifications.py

@@ -47,8 +47,8 @@ class Command(BaseCommand):
             created_cc += 1
 
         # If '--certificate' was passed, transform any earned receipt in a certificate
-        certificates_earned = 0
         if options['certificate']:
+            certificates_earned = 0
             for cc in CourseCertification.objects.all():
                 if cc.course_student.can_emmit_receipt() and cc.type == CourseCertification.TYPES[0][0]:
                     cc.type = CourseCertification.TYPES[1][0]
@@ -56,6 +56,9 @@ class Command(BaseCommand):
                         cc.save()
                     certificates_earned += 1
 
+        if options['dry_run']:
+            print('This is a dry run, so the below changes will not be commited')
+
         print(f'CourseCertification objects created: {created_cc}')
 
         if options['certificate']: