hg-git

• Homepage: http://hg-git.github.com/
• https://bitbucket.org/durin42/hg-git (primary)
• https://github.com/schacon/hg-git (mirror)

This is the Hg-Git plugin for Mercurial, adding the ability to push and pull to/from a Git server repository from Hg. This means you can collaborate on Git based projects from Hg, or use a Git server as a collaboration point for a team with developers using both Git and Hg.
The Hg-Git plugin can convert commits/changesets losslessly from one system to another, so you can push via an Hg repository and another Hg client can pull it and their changeset node ids will be identical - Mercurial data does not get lost in translation. It is intended that Hg users may wish to use this to collaborate even if no Git users are involved in the project, and it may even provide some advantages if you're using Bookmarks (see below).

Dependencies

This plugin is implemented entirely in Python - there are no Git binary dependencies, you do not need to have Git installed on your system. The only dependencies are Mercurial and Dulwich. See the Makefile for information about which versions of Mercurial are known to work, and setup.py for which versions of Dulwich are required.

Usage

You can clone a Git repository from Hg by running hg clone <url> [dest]. For example, if you were to run

$ hg clone git://github.com/schacon/hg-git.git

Hg-Git would clone the repository and convert it to an Hg repository for you.
If you want to clone a github repository for later pushing (or any other repository you access via ssh), you need to convert the ssh url to a format with an explicit protocol prefix. For example, the git url with push access

git@github.com:schacon/hg-git.git

would read

git+ssh://git@github.com/schacon/hg-git.git

(Mind the switch from colon to slash after the host!)
Your clone command would thus look like this:

$ hg clone git+ssh://git@github.com/schacon/hg-git.git

If you are starting from an existing Hg repository, you have to set up a Git repository somewhere that you have push access to, add a path entry for it in your .hg/hgrc file, and then run hg push [name] from within your repository. For example:

$ cd hg-git # (an Hg repository)
$ # edit .hg/hgrc and add the target git url in the paths section
$ hg push

This will convert all your Hg data into Git objects and push them to the Git server.
Now that you have an Hg repository that can push/pull to/from a Git repository, you can fetch updates with hg pull.

$ hg pull

That will pull down any commits that have been pushed to the server in the meantime and give you a new head that you can merge in.
Hg-Git can also be used to convert a Mercurial repository to Git. You can use a local repository or a remote repository accessed via SSH, HTTP or HTTPS. Use the following commands to convert the repository (it assumes you're running this in $HOME).

$ mkdir git-repo; cd git-repo; git init; cd ..
$ cd hg-repo
$ hg bookmarks hg
$ hg push ../git-repo

The hg bookmark is necessary to prevent problems as otherwise hg-git pushes to the currently checked out branch confusing Git. This will create a branch named hg in the Git repository. To get the changes in master use the following command (only necessary in the first run, later just use git merge or rebase).

$ cd git-repo
$ git checkout -b master hg

To import new changesets into the Git repository just rerun the hg push command and then use git merge or git rebase in your Git repository.

from https://bitbucket.org/durin42/hg-git
https://bitbucket.org/Scotty/hg-git