Now the files migration does not die when a file is missing.

It now just ignore that file and continue with the rest.

web/modules/custom/geo_upgrade/migrations/upgrade_d7_file.yml

@@ -9,7 +9,7 @@ source:
   plugin: d7_file
   scheme: public
   constants:
-    source_base_path: '/var/www/html/d7/'
+    source_base_path: '../d7/'
 process:
   fid:
     -
@@ -29,11 +29,11 @@ process:
     -
       plugin: urlencode
   uri:
-    -
-      plugin: file_copy
+    - plugin: geo_file_exists
       source:
         - '@source_full_path'
         - uri
+    - plugin: file_copy
   filemime:
     -
       plugin: get