rewrite reads a file, feeding its content through a shell command or a pipeline, and writes it back to the file. It allows for in place (re)compression, for example. For large multi-part archives, you may not otherwise be able to uncompress and recompress the data again because of lack of temporary disk space. If the output from the pipeline is bigger than the file, the program will continue to allocate memory to buffer the difference, and it will never overwrite data in the file before reading it.
Release Notes: Initial release.