native::Delta

Section: User Contributed Perl Documentation (3)
Updated: 2019-01-20
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NAME

SVN::Delta - Subversion delta functions

SYNOPSIS

    require SVN::Core;
    require SVN::Repos;
    require SVN::Delta;

    # driving an editor
    my $editor = SVN::Delta::Editor->
        new(SVN::Repos::get_commit_editor($repos, "file://$repospath",
                                          '/', 'root', 'FOO', \&committed));

    my $rootbaton = $editor->open_root(0);

    my $fbaton = $editor->add_file('filea', $rootbaton,
                                   undef, -1);

    my $ret = $editor->apply_textdelta($fbaton, undef);
    SVN::TxDelta::send_string("FILEA CONTENT", @$ret);

    # implement an editor in perl
    SVN::Repos::dir_delta($root1, $path, undef,
                          $root2, $path,
                          SVN::Delta::Editor->new(_debug=>1),
                          1, 1, 0, 1

DESCRIPTION

SVN::Delta wraps delta related function in subversion. The most important one is SVN::Delta::Editor, the interface for describing tree deltas. by default SVN::Delta::Editor relays method calls to its internal member "_editor", which could either be an editor in C (such as the one you get from get_commit_editor), or another SVN::Delta::Editor object.

SVN::Delta::Editor

Driving Editors

If you want to drive a native editor (such as commit_editor obtained by SVN::Repos::get_commit_editor), create a SVN::Delta::Editor object with the native editor/baton pair. The object will then be ready to use and its method calls will be relayed to the native editor.

Implementing Editors

If you want to implement an editor, subclass SVN::Delta::Editor and implement the editors callbacks. see the METHODS section below.

CONSTRUCTOR - new(...)

new($editor, $editor_baton): Link to the native editor

You can also pass a hash array to new:

_debug: Turn on debug.
_editor: An arrayref of the editor/baton pair or another SVN::Delta::Editor object to link with.

METHODS

Please consult the svn_delta.h section in the Subversion API. Member functions of svn_delta_editor_t could be called as methods of SVN::Delta::Editor objects, with the edit_baton omitted. The pool is also optional.

If you are subclassing, the methods take exactly the same arguments as the member functions (note that void ** are returned data though as throughout the perl bindings), with the edit_baton omitted.

BUGS

Functions returning editor/baton pair should really be typemapped to a SVN::Delta::Editor object.

AUTHORS

Chia-liang Kao <clkao@clkao.org>

COPYRIGHT

    Licensed to the Apache Software Foundation (ASF) under one
    or more contributor license agreements.  See the NOTICE file
    distributed with this work for additional information
    regarding copyright ownership.  The ASF licenses this file
    to you under the Apache License, Version 2.0 (the
    "License"); you may not use this file except in compliance
    with the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing,
    software distributed under the License is distributed on an
    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    KIND, either express or implied.  See the License for the
    specific language governing permissions and limitations
    under the License.