Upgrade to Archive::Tar 1.26

[p5sagit/p5-mst-13.2.git] / lib / Archive / Tar / bin / ptardiff

#!/usr/bin/perl

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 $name = $file->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

    ] . $/;
}