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+# ZsDiff
+
+A partial update program. Use [Zstandrard](https://github.com/facebook/zstd).
+
+`zsdiff` products a [filename].zdiff file. It compares ALL file hashes from old with new.
+
+```
+Usage: zsdiff [OPTIONS] --filename <FILENAME> --old <OLD> --new <NEW>
+
+Options:
+  -f, --filename <FILENAME>              
+  -c, --compress-level <COMPRESS_LEVEL>  [default: 11]
+  -o, --old <OLD>                        
+  -n, --new <NEW>                        
+  -h, --help                             Print help
+```
+
+`zspatch` extract files from [filename].zdiff to [dest-dir]. If some file was deleted between old and new, `zspatch`
+also delete it from [dest-dir]
+
+```
+Usage: zspatch [OPTIONS] --filename <FILENAME> --dest-dir <DEST_DIR>
+
+Options:
+  -f, --filename <FILENAME>  
+  -d, --dest-dir <DEST_DIR>  
+  -h, --hash-check           
+  -h, --help                 Print help
+```
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