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- Xdelta version 3.0.7, Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 Joshua MacDonald
- Xdelta comes with ABSOLUTELY NO WARRANTY.
- This is free software, and you are welcome to redistribute it
- under certain conditions; see "COPYING" for details.
- usage: xdelta3 [command/options] [input [output]]
- make patch:
- xdelta3.exe -e -s old_file new_file delta_file
- apply patch:
- xdelta3.exe -d -s old_file delta_file decoded_new_file
- special command names:
- config prints xdelta3 configuration
- decode decompress the input
- encode compress the input
- test run the builtin tests
- special commands for VCDIFF inputs:
- printdelta print information about the entire delta
- printhdr print information about the first window
- printhdrs print information about all windows
- recode encode with new application/secondary settings
- merge merge VCDIFF inputs (see below)
- merge patches:
- xdelta3 merge -m 1.vcdiff -m 2.vcdiff 3.vcdiff merged.vcdiff
- standard options:
- -0 .. -9 compression level
- -c use stdout
- -d decompress
- -e compress
- -f force (overwrite, ignore trailing garbage)
- -F force the external-compression subprocess
- -h show help
- -q be quiet
- -v be verbose (max 2)
- -V show version
- memory options:
- -B bytes source window size
- -W bytes input window size
- -P size compression duplicates window
- -I size instruction buffer size (0 = unlimited)
- compression options:
- -s source source file to copy from (if any)
- -S [djw|fgk|lzma|none]
- enable/disable secondary compression
- -N disable small string-matching compression
- -D disable external decompression (encode/decode)
- -R disable external recompression (decode)
- -n disable checksum (encode/decode)
- -C soft config (encode, undocumented)
- -A [apphead] disable/provide application header (encode)
- -J disable output (check/compute only)
- -T use alternate code table (test)
- -m arguments for "merge"
- the XDELTA environment variable may contain extra args:
- XDELTA="-s source-x.y.tar.gz" \
- tar --use-compress-program=xdelta3 \
- -cf target-x.z.tar.gz.vcdiff target-x.y
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