PatchReader(3) User Contributed Perl Documentation PatchReader(3)NAMEPatchReader - Utilities to read and manipulate patches and CVS
SYNOPSIS
# script that reads in a patch (in any known format), and prints out some
# information about it. Other common operations are outputting the patch
# in a raw unified diff format, outputting the patch information to
# Template::Toolkit templates, adding context to a patch from CVS, and
# narrowing the patch down to apply only to a single file or set of files.
use PatchReader::Raw;
use PatchReader::PatchInfoGrabber;
my $filename = 'filename.patch';
# Create the reader that parses the patch and the object that extracts info
# from the reader's datastream
my $reader = new PatchReader::Raw();
my $patch_info_grabber = new PatchReader::PatchInfoGrabber();
$reader->sends_data_to($patch_info_grabber);
# Iterate over the file
$reader->iterate_file($filename);
# Print the output
my $patch_info = $patch_info_grabber->patch_info();
print "Summary of Changed Files:\n";
while (my ($file, $info) = each %{$patch_info->{files}}) {
print "$file: +$info->{plus_lines} -$info->{minus_lines}\n";
}
ABSTRACT
This perl library allows you to manipulate patches programmatically by
chaining together a variety of objects that read, manipulate, and
output patch information:
PatchReader::Raw - parse a patch in any format known to this author
(unified, normal, cvs diff,
among others) PatchReader::PatchInfoGrabber - grab summary info for
sections of a patch in a nice hash
of a patch, for example) PatchReader::AddCVSContext - add context to
the patch by grabbing the original files from CVS
PatchReader::NarrowPatch - narrow a patch down to only apply to a
specific set of files
PatchReader::DiffPrinter::raw - output the parsed patch in raw unified
diff format PatchReader::DiffPrinter::template - output the parsed
patch to Template::Toolkit templates (can be used to make
HTML output or anything else you please)
Additionally, it is designed so that you can plug in your own objects
that read the parsed data while it is being parsed (no need for the
performance or memory problems that can come from reading in the entire
patch all at once). You can do this by mimicking one of the existing
readers (such as PatchInfoGrabber) and overriding the methods
start_patch, start_file, section, end_file and end_patch.
perl v5.14.1 2004-07-17 PatchReader(3)
