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VCS::Lite::Delta(3pm) User Contributed Perl Documentation VCS::Lite::Delta(3pm) NAME
VCS::Lite::Delta - VCS::Lite differences SYNOPSIS
use VCS::Lite; # diff my $lit = VCS::Lite->new('/home/me/foo1.txt'); my $lit2 = VCS::Lite->new('/home/me/foo2.txt'); my $difftxt = $lit->delta($lit2)->diff; print OUTFILE $difftxt; # patch my $delt = VCS::Lite::Delta->new('/home/me/patch.diff'); my $lit3 = $lit->patch($delt); print OUTFILE $lit3->text; DESCRIPTION
This module provides a Delta class for the differencing functionality of VCS::Lite API
new The underlying object of VCS::Lite::Delta is an array of difference chunks (hunks) such as that returned by Algorithm::Diff. The constructor takes the following forms: my $delt = VCS::Lite::Delta->new( '/my/file.diff',$sep); # File name my $delt = VCS::Lite::Delta->new( *FILE,$sep); # File handle my $delt = VCS::Lite::Delta->new( $string,$sep); # String as scalar ref my $delt = VCS::Lite::Delta->new( @foo, $id1, $id2) # Array ref $sep here is a regexp by which to split strings into tokens. The default is to use the natural perl mechanism of $/ (which is emulated when not reading from a file). The arrayref form is assuming an array of hunks such as the output from Algorithm::Diff::diff. The other forms assume the input is the text form of a diff listing, either in diff format, or in unified format. The input is parsed, and errors are reported. diff print OUTFILE $delt->diff This generates a standard diff format, for example: 4c4 < Now wherefore stopp'st thou me? --- > Now wherefore stoppest thou me? udiff print OUTFILE $delt->udiff This generates a unified diff (like diff -u) similar to the form in which patches are submitted. id my ($id1,$id2) = $delt->id; $delt2->id('foo.pl@@1','foo.pl@@3') The id method allows get and set of the names associated with the two elements being diffed. The id is set for delta objects returned by VCS::Lite->diff, to the element IDs of the VCS::Lite objects being diffed. Diff format omits the file names, hence the IDs will not be populated by new. This is not the case with diff -u format, which includes the file names which are passed in and available as IDs. hunks my @hunklist = $delt->hunks A hunk is a technical term for a section of input containing a difference. Each hunk is an arrayref, containing the block of lines. Each line is itself an arrayref, for example: [ [ '+', 9, 'use Acme::Foo;'], [ '-', 9, 'use Acme::Bar;'], ] See the documentation on Algorithm::Diff for more details of this structure. BUGS, PATCHES &; FIXES There are no known bugs at the time of this release. However, if you spot a bug or are experiencing difficulties that are not explained within the POD documentation, please send an email to barbie@cpan.org or submit a bug to the RT system (see link below). However, it would help greatly if you are able to pinpoint problems or even supply a patch. http://rt.cpan.org/Public/Dist/Display.html?Name=VCS-Lite Fixes are dependant upon their severity and my availablity. Should a fix not be forthcoming, please feel free to (politely) remind me. AUTHOR
Original Author: Ivor Williams (RIP) 2008-2009 Current Maintainer: Barbie <barbie@cpan.org> 2009 COPYRIGHT
Copyright (c) Ivor Williams, 2002-2006 Copyright (c) Barbie, 2009 LICENCE
You may use, modify and distribute this module under the same terms as Perl itself. SEE ALSO
Algorithm::Diff. perl v5.10.1 2009-10-25 VCS::Lite::Delta(3pm)
