native::Delta(3)

💖 native::Delta(3) 💖

okay bestie, gather round, because this is the manual page for SVN::Delta — from your friendly neighborhood native::Delta(3) man page, shipped with User Contributed Perl Documentation. it's giving "perl bindings that talk to Subversion" and honestly? iconic. let's go. 🦋

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✨ NAME ✨

SVN::Delta — Subversion delta functions. that's it, that's the name, no notes. 💅

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🌸 SYNOPSIS 🌸

like, just look at it. the vibes are immaculate:

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

(yes, the last line is missing its closing paren in the source. i'm not touching it. we keep everything exactly as it is, periodt. 🔥)

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💜 DESCRIPTION 💜

so SVN::Delta is a wrapper around all the delta-related functions in subversion. the main character here — the one you're actually here for — is SVN::Delta::Editor, which is the interface for describing tree deltas. 🌳

here's the tea: by default, SVN::Delta::Editor just relays method calls to its internal member "_editor". and that _editor can be either:

• an editor written in C (like the one you get from get_commit_editor), or
• another SVN::Delta::Editor object.

no cap, that's the whole relay situation. 🫶

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👑 SVN::Delta::Editor 👑

🚗 Driving Editors

if you wanna drive a native editor (like, say, commit_editor that you got from SVN::Repos::get_commit_editor), you make a SVN::Delta::Editor object with the native editor/baton pair. after that the object is ready to go and its method calls get relayed straight to the native editor. slay. ✨

🛠️ Implementing Editors

if you wanna implement an editor instead, subclass SVN::Delta::Editor and implement the editor's callbacks. check the METHODS section below for the deets. 💖

🎀 CONSTRUCTOR - new(...)

new($editor, $editor_baton)

link to the native editor. that's the whole job. 💅

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

bestie, please consult the svn_delta.h section in the Subversion API. 🙏

the member functions of svn_delta_editor_t can be called as methods of SVN::Delta::Editor objects, with the edit_baton omitted. and the pool? also optional. we love a flexible signature. 💅

if you're 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. that void ** detail matters, don't sleep on it. 😭

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💀 BUGS 💀

functions that return an editor/baton pair should really be typemapped to an SVN::Delta::Editor object. like, they just should. it's giving unfinished business and we're all just living with it. 🙈

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🌈 AUTHORS 🌈

Chia-liang Kao <clkao@clkao.org> — thank you for your service, king. 👑

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⭐ COPYRIGHT ⭐

read it and weep (respectfully), here's the license text, verbatim:

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.

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and that's the whole page, bestie!! 🎀 this was generated by perl v5.42.3 and dated 2026-10-16, for the native::Delta(3) manual. take care of her, she's doing her best. mwah. 💋💖✨