Text::Patch - Patches text with given patch


    use Text::Patch;

    $output = patch( $source, $diff, STYLE => "Unified" );

    use Text::Diff;

    $src  = ...
    $dst  = ...

    $diff = diff( \$src, \$dst, { STYLE => 'Unified' } );

    $out  = patch( $src, $diff, { STYLE => 'Unified' } );

    print "Patch successful" if $out eq $dst;


Text::Patch combines source text with given diff (difference) data. Diff data is produced by Text::Diff module or by the standard diff utility (man diff, see -u option).

patch( $source, $diff, options... )

First argument is source (original) text. Second is the diff data. Third argument can be either hash reference with options or all the rest arguments will be considered patch options:

    $output = patch( $source, $diff, STYLE => "Unified", ... );

    $output = patch( $source, $diff, { STYLE => "Unified", ... } );

Options are:

  STYLE => 'Unified'

STYLE can be "Unified", "Context" or "OldStyle".

The 'Unified' diff format looks like this:

  @@ -1,7 +1,6 @@
  -The Way that can be told of is not the eternal Way;
  -The name that can be named is not the eternal name.
   The Nameless is the origin of Heaven and Earth;
  -The Named is the mother of all things.
  +The named is the mother of all things.
   Therefore let there always be non-being,
     so we may see their subtlety,
   And let there always be being,
  @@ -9,3 +8,6 @@
   The two are the same,
   But after they are produced,
     they have different names.
  +They both may be called deep and profound.
  +Deeper and more profound,
  +The door of all subtleties!


  Interfaces with files, arrays, etc.


  Vladi Belperchinov-Shabanski "Cade"

  <> <> <>


  $Id:,v 1.6 2007/04/07 19:57:41 cade Exp $