ptardiff - program that diffs an extracted archive against an unextracted one
ptardiff is a small program that diffs an extracted archive
against an unextracted one, using the perl module Archive::Tar.
This effectively lets you view changes made to an archives contents.
Provide the progam with an ARCHIVE_FILE and it will look up all
the files with in the archive, scan the current working directory
for a file with the name and diff it against the contents of the
$ tar -xzf Acme-Buffy-1.3.tar.gz
$ vi Acme-Buffy-1.3/README
$ ptardiff Acme-Buffy-1.3.tar.gz > README.patch