PTARDIFF(1) Perl Programmers Reference Guide PTARDIFF(1)
ptardiff – program that diffs an extracted archive against an
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
h Prints this help message
perl v5.22.1 2016-03-13 PTARDIFF(1)