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Differences between revisions 34 and 36 (spanning 2 versions)
Revision 34 as of 2006-02-27 13:31:15
Size: 4804
Editor: MatthieuMoy
Comment: Why were all those informations deleted ???
Revision 36 as of 2006-02-27 16:51:48
Size: 4378
Editor: AaronBentley
Comment: Brought footnotes back as a details section
Deletions are marked like this. Additions are marked like this.
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||RCS Name ||Bazaar-NG||Arch||CVS ||Subversion ||Git ||Hg ||Monotone||Darcs||
||Decentralized ||Yes ||Yes ||No ||No [#3 (3)]||Yes ||Yes||Yes ||Yes ||
||Disconnected Ops ||Yes ||Yes ||No ||No  ||Yes ||Yes||Yes ||Yes ||
||Simple Namespace ||Yes ||No ||No ||Yes  ||No ||No ||No ||Yes ||
||Supports Renames ||Yes ||Yes ||No ||Yes ||Yes[#2 (2)]||Yes[#1 (1)]||Yes ||Yes ||
||Needs Repository ||No ||Yes ||Yes ||Yes  || || || || ||
||Checkouts ||Yes ||No  ||Yes ||Yes || || || ||No ||
||Atomic Commit ||Yes ||Yes ||No ||Yes  || || || || ||
||RCS Name ||Bazaar-NG||Arch||CVS ||Subversion||Git ||Hg ||Monotone||Darcs||
||Decentralized ||Yes ||Yes ||No ||No        ||Yes ||Yes||Yes ||Yes ||
||Disconnected Ops ||Yes ||Yes ||No ||No ||Yes ||Yes||Yes ||Yes ||
||Simple Namespace ||Yes ||No ||No ||Yes ||No ||No ||No ||Yes ||
||Supports Renames ||Yes ||Yes ||No ||Yes       ||Yes ||No ||Yes ||Yes ||
||Needs Repository ||No ||Yes ||Yes ||Yes || || || || ||
||Checkouts ||Yes ||No ||Yes ||Yes || || || ||No ||
||Atomic Commit ||Yes ||Yes ||No ||Yes || || || || ||
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||[:CherryPick:Cherrypicks] ||Yes ||Yes ||Yes ||Yes || ||Yes||Somewhat[#5 (5)]||Yes || ||[:CherryPick:Cherrypicks] ||Yes ||Yes ||Yes ||Yes || ||Yes||Yes     ||Yes ||
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||Good Windows support ||Yes ||No ||Yes ||Yes ||No[#4 (4)]||Yes|| || || ||Good Windows support ||Yes ||No ||Yes ||Yes ||No  ||Yes|| || ||
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Whether the Microsoft Windows platform is well supported. Whether the Microsoft Windows platform has good native support. Cygwin support is not sufficient.
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= Footnotes = = Details of particular VCSes =
In some cases, it is hard to answer 'yes' or 'no' to a particular question.
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[[Anchor(1)]] 1. Support for renames in hg is being implemented. Unlike bzr, it uses rename history instead of unique file ID. == Hg ==
Hg plans to support renames, but does not yet. (Hg also doesn't version directories, so its support for file moves is unlikely to be robust.)
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[[Anchor(2)]] 2. Git has a very particular management of renames. It does not track renames at commit time at all. However, it "guesses" them at merge time. Since it uses hashes, it can immediately see renames without modifications, and otherwise, it has to use a heuristic to find the file with the closest content. Linus claims that this is the best model, while other find it completely broken. See for example [http://www.mail-archive.com/git@vger.kernel.org/msg03711.html this post]. == Git ==
Git does not store renames. However, features like merge can make pretty good guesses about renames.
Git does not work on native Windows, but does work (slowly) on Cygwin.
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[[Anchor(3)]] 3. Subversion is surely not a decentralized revision control system (see for example [http://subversion.tigris.org/subversion-linus.html this page] if you're not convinced). However, [http://svk.elixus.org/ svk] is built on top of subversion and is a decentralized revision control system.

[[Anchor(4)]] 4. Can be made to work on cygwin, but with poor performance.
== Subversion ==
Subversion does not support decentralized operation, but svk is a decentralized VCS implemented on top of svn.

This chart is a rough draft

This page is a user-oriented comparison of different revision control system. For a more technical comparison, see ["RCSChoices"]. See also ["SCMComparisons"] (note: this may be better to move the content of this page here) for a brief presentation of each system and how they compare to Bazaar-NG in particular. The determination on this chart is based upon the core installation and features that are already working in devel.

Overview

RCS Name

Bazaar-NG

Arch

CVS

Subversion

Git

Hg

Monotone

Darcs

Decentralized

Yes

Yes

No

No

Yes

Yes

Yes

Yes

Disconnected Ops

Yes

Yes

No

No

Yes

Yes

Yes

Yes

Simple Namespace

Yes

No

No

Yes

No

No

No

Yes

Supports Renames

Yes

Yes

No

Yes

Yes

No

Yes

Yes

Needs Repository

No

Yes

Yes

Yes

Checkouts

Yes

No

Yes

Yes

No

Atomic Commit

Yes

Yes

No

Yes

[:Merge:Smart Merge]

Yes

Yes

No

No

No?

Yes

Yes

[:CherryPick:Cherrypicks]

Yes

Yes

Yes

Yes

Yes

Yes

Yes

[:BzrPlugins:Plugins]

Yes

No

No

Has Special Server

No

No

Yes

Yes

Req. Dedicated Server

No

No

Remote

Remote

No

No

No

Yes

Good Windows support

Yes

No

Yes

Yes

No

Yes

Details about each feature

Decentralized

Whether the tool is designed to allow [:Branch:branches] of the same project to be in different remote [:Repository:repositories].

Simple Namespace

The namespace is the way the RCS communicates with the user the various resources for the RCS such as the names for branches and the names for [:Revision:revisions] that are [:Merge:merge]. For example: requiring the user to refer to revisions with base-16 numbers is not considered "simple" in this document.

Needs Repository

Some revision control systems require that branches be aggregated into [:Repository:repositories].

Supports Renames

If a user can rename a file in the RCS without loosing the RCS history for a file, then renames are considered supported. If the operation resultes in a delete/add (aka "DA pair"), then renames are not considered supported.

Has Checkouts

A ["Checkout"] is a [:WorkingTree:working tree] that points elsewhere for its RCS data.

Atomic Commit

Does the RCS track which files were associated with which [:Commit:commit].

Smart Merge

Whether the tool is able to know which revisions have to be merged (recording [:Merge:merge] history is a necessary condition for this).

Cherrypicks

Whether the tool allows CherryPick (fine-grained selection of revisions to be merged).

Plugins

Whether the tool is extensible with plugins. Our plugins are on the BzrPlugins page.

Can use standard fileserver

Whether the tool can work with a standard file server (HTTP for read-only operations, ftp/sftp/webdav or others for write operations). This allows you to host a repository on almost any internet service provider without dedicated support.

Work on partial checkout

Whether a user can checkout only a subdirectory of a project and work on it.

Windows support

Whether the Microsoft Windows platform has good native support. Cygwin support is not sufficient.

Details of particular VCSes

In some cases, it is hard to answer 'yes' or 'no' to a particular question.

Hg

Hg plans to support renames, but does not yet. (Hg also doesn't version directories, so its support for file moves is unlikely to be robust.)

Git

Git does not store renames. However, features like merge can make pretty good guesses about renames. Git does not work on native Windows, but does work (slowly) on Cygwin.

Subversion

Subversion does not support decentralized operation, but svk is a decentralized VCS implemented on top of svn.