- CreationDate
- 2005-01-21 20:30:16 UTC
- Description
- Subversion features:
# Most current CVS features.
Subversion is meant to be a better CVS, so it has most of CVS's features. Generally,
Subversion's interface to a particular feature is similar to CVS's, except where there's
a compelling reason to do otherwise.
# Directories, renames, and file meta-data are versioned.
Lack of these features is one of the most common complaints against CVS. Subversion
versions not only file contents and file existence, but also directories, copies,
and renames. It also allows arbitrary metadata ("properties") to be versioned along
with any file or directory, and provides a mechanism for versioning the `execute'
permission flag on files.
# Commits are truly atomic.
No part of a commit takes effect until the entire commit has succeeded. Revision numbers
are per-commit, not per-file; log messages are attached to the revision, not stored
redundantly as in CVS.
# Apache network server option, with WebDAV/DeltaV protocol.
Subversion can use the HTTP-based WebDAV/DeltaV protocol for network communications,
and the Apache web server to provide repository-side network service. This gives Subversion
an advantage over CVS in interoperability, and provides various key features for free:
authentication, path-based authorization, wire compression, and basic repository browsing.
# Standalone server option.
Subversion also offers a standalone server option using a custom protocol (not everyone
wants to run Apache 2.x). The standalone server can run as an inetd service, or in
daemon mode, and offers basic authentication and authorization. It can also be tunnelled
over ssh.
# Branching and tagging are cheap (constant time) operations
There is no reason for these operations to be expensive, so they aren't.
Branches and tags are both implemented in terms of an underlying "copy" operation.
A copy takes up a small, constant amount of space. Any copy is a tag; and if you start
committing on a copy, then it's a branch as well. (This does away with CVS's "branch-point
tagging", by removing the distinction that made branch-point tags necessary in the
first place.)
# Natively client/server, layered library design
Subversion is designed to be client/server from the beginning; thus avoiding some
of the maintenance problems which have plagued CVS. The code is structured as a set
of modules with well-defined interfaces, designed to be called by other applications.
# Client/server protocol sends diffs in both directions
The network protocol uses bandwidth efficiently by transmitting diffs in both directions
whenever possible (CVS sends diffs from server to client, but not client to server).
# Costs are proportional to change size, not data size
In general, the time required for a Subversion operation is proportional to the size
of the changes resulting from that operation, not to the absolute size of the project
in which the changes are taking place. This is a property of the Subversion repository
model.
# Choice of database or plain-file repository implementations
Repositories can be created with either an embedded database back-end (BerkeleyDB)
or with normal flat-file back-end, which uses a custom format.
# Versioning of symbolic links
Unix users can place symbolic links under version control. The links are recreated
in Unix working copies, but not in win32 working copies.
# Efficient handling of binary files
Subversion is equally efficient on binary as on text files, because it uses a binary
diffing algorithm to transmit and store successive revisions.
# Parseable output
All output of the Subversion command-line client is carefully designed to be both
human readable and automatically parseable; scriptability is a high priority.
# Localized messages
Subversion uses gettext() to display translated error, informational, and help messages,
based on current locale settings.
- DisplayName
- subversion
- Homepage
- http://subversion.tigris.org/
- Name
- subversion
- Owner
-
- ProgrammingLanguage
- C
- Series
-
- ShortDescription
- The goal of the Subversion project is to build a version control system that is a
compelling replacement for CVS in the open source community.
- SpecifiedAt
- +rdf
- Status
- Active
- Title
- subversion