Mercurial 3.7 發布，分布式版本控制系統

Mercurial 是一種輕量級分布式版本控制系統，采用 Python 語言實現，易于學習和使用，擴展性強。相對于傳統的版本控制

Mercurial 3.7 發布，更新如下：

特性

• Generaldelta: the original Mercurial compression format had an inefficient way of storing history in very branchy repositories. Generaldelta addresses this weakness. As a result, depending on the repository, this can improve the size of the history up to a factor of 10. Mercurial 1.9 was the first release to support generaldelta (behind a feature flag), but Mercurial 3.7 also allows pulling a mixture of non-generaldelta and generaldelta history without having to recompute everything, which avoids overloading servers. As a result, generaldelta is now enabled by default. You can convert a repository to generaldelta using:

  hg clone -U --config format.generaldelta=1 --pull originalrepo generaldeltarepo

• Clonebundles: this is an server-side extension. It allows using a pre-generated bundle for an initial Mercurial clone. Clients will automatically use clonebundles if a server advertises them. Clonebundles allows much faster initial clones and reduces the load on a central server significantly. Mercurial 3.6 was the first version to include experimental clonebundles support, it's now been marked non-experimental. You can find out more using: hg help clonebundles.

• Filesets now support 'missing()', to specify all files missing according to hg status.

• Interactive committing (hg commit -i) and amending (hg commit --amend) can now be used together.

• Merging can now handle collisions between untracked and tracked files, configurable according to the config option merge.checkunknown.

• Default 'histedit' destination: it's now possible to run hg histedit without specifying a base revision. Mercurial will try to determine an appropriate base automatically. The revset used for this is "reverse(only(.) and not public() and not ::merge())", which specifies the first ancestor of the current changeset that is not public and does not have any descendants that are merges.

• The '*.orig' files created by revert can now be stored in a different location, specified by the config option ui.origbackuppath.

• hg shelve now supports storing untracked files.

• hg unshelve now supports using a custom merge tool.

• hg backout now commits by default if no conflicts were encountered.

• hgweb now supports rendering sub-topics.

• Server operators can now limit interaction with legacy clients speaking an outdated wire protocol. This is useful for preventing excessive CPU use when the server is using generaldelta repositories. See the various bundle1 options in hg help config.server.

• Python wheel packages are now available for Windows on PyPI

• [paths] entries can now define a separate URL for pushes. See hg help config.paths for more.

This release includes many improvements, including (but not limited to):

• performance improvements (speedup for 'hg log <file/folder>')

• many documentation improvements (clarification, additional examples (see hg help <command> --verbose), ...)

• improved PyPy support

• hg clone --uncompressed is now 3-4x faster on Windows. See the backgroundclose* options in hg help config.worker for more.

完整更新請看： WhatsNew.

Mercurial 是一種輕量級分布式版本控制系統，采用 Python 語言實現，易于學習和使用，擴展性強。相對于傳統的版本控制，具有如下優點：

• 更輕松的管理。
      傳統的版本控制系統使用集中式的 repository，一些和 repository相關的管理就只能由管理員一個人進行。由于采用了分布式的模型，Mercurial 中就沒有這樣的困擾，每個用戶管理自己的 repository，管理員只需協調同步這些repository。   

• 更健壯的系統。
      分布式系統比集中式的單服務器系統更健壯，單服務器系統一旦服務器出現問題整個系統就不能運行了，分布式系統通常不會因為一兩個節點而受到影響。   

• 對網絡的依賴性更低。
      由于同步可以放在任意時刻進行，Mercurial 甚至可以離線進行管理，只需在有網絡連接時同步。

來自： http://www.oschina.net//news/70430/mercurial-3-7