#!/usr/bin/perl
BEGIN { pop @INC if $INC[-1] eq '.' }
use strict;
use Archive::Tar;
use Getopt::Std;
my $opts = {};
getopts('h:', $opts) or die usage();
die usages() if $opts->{h};
### need Text::Diff -- give a polite error (not a standard prereq)
unless ( eval { require Text::Diff; Text::Diff->import; 1 } ) {
die "\n\t This tool requires the 'Text::Diff' module to be installed\n";
}
my $arch = shift or die usage();
my $tar = Archive::Tar->new( $arch ) or die "Couldn't read '$arch': $!";
foreach my $file ( $tar->get_files ) {
next unless $file->is_file;
my $prefix = $file->prefix;
my $name = $file->name;
if (defined $prefix) {
$name = File::Spec->catfile($prefix, $name);
}
diff( \($file->get_content), $name,
{ FILENAME_A => $name,
MTIME_A => $file->mtime,
OUTPUT => \*STDOUT
}
);
}
sub usage {
return q[
Usage: ptardiff ARCHIVE_FILE
ptardiff -h
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
archive.
Options:
h Prints this help message
Sample Usage:
$ tar -xzf Acme-Buffy-1.3.tar.gz
$ vi Acme-Buffy-1.3/README
[...]
$ ptardiff Acme-Buffy-1.3.tar.gz > README.patch
See Also:
tar(1)
ptar
Archive::Tar
] . $/;
}
=head1 NAME
ptardiff - program that diffs an extracted archive against an unextracted one
=head1 DESCRIPTION
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
archive.
=head1 SYNOPSIS
ptardiff ARCHIVE_FILE
ptardiff -h
$ tar -xzf Acme-Buffy-1.3.tar.gz
$ vi Acme-Buffy-1.3/README
[...]
$ ptardiff Acme-Buffy-1.3.tar.gz > README.patch
=head1 OPTIONS
h Prints this help message
=head1 SEE ALSO
tar(1), L<Archive::Tar>.
=cut