Merge pull request #149 from fschuh/main_test

Support for incremental merges of two export folders

README.md

@@ -231,6 +231,19 @@ Contact Enrichment:
                         Use with --enrich-from-vcards. When numbers in the vcf file does not have a country code, this
                         will be used. 1 is for US, 66 for Thailand etc. Most likely use the number of your own country
 
+Incremental Merging:
+  --incremental-merge   Performs an incremental merge of two exports. Requires setting both --source-
+                        dir and --target-dir. The chats (JSON files only) and media from the source
+                        directory will be merged into the target directory. No chat messages or media
+                        will be deleted from the target directory; only new chat messages and media
+                        will be added to it. This enables chat messages and media to be deleted from
+                        the device to free up space, while ensuring they are preserved in the exported
+                        backups.
+  --source-dir SOURCE_DIR
+                        Sets the source directory. Used for performing incremental merges.
+  --target-dir TARGET_DIR
+                        Sets the target directory. Used for performing incremental merges.
+
 Miscellaneous:
   -s, --showkey         Show the HEX key used to decrypt the database
   --check-update        Check for updates (require Internet access)