Updated version of the instructions in http://traviscline.com/blog/2010/04/27/using-hg-git-to-work-in-git-and-push-to-hg/ with a few tweaks

1. Install hg-git (e.g. pip install hg-git)

2. Make sure you've enabled the Hg bookmark extension in your .hgrc

3. Add this to your .hgrc:

   [git]
   intree=1
   [extensions]
   hggit =
   

And also .hg/hgignore: http://mercurial.selenic.com/wiki/TipsAndTricks#Ignore_files_in_local_working_copy_only

1. Clone your Mercurial repo:

   $ hg clone https://[email protected]/ned/coveragepy
   

2. Change into the repo:

   $ cd coveragepy
   

3. Create a local bookmark tracking your Mercurial default branch - this is what will be exported to Git:

   $ hg bookmark hg/default -r default
   

4. Export to the git repo:

   $ hg gexport
   

5. Configure Hg to ignore the Git repo:

   $ echo ".git" >> .hg/hgignore
   

6. Configure Git to ignore the Hg repo:

   $ echo ".hg*" >> .git/info/exclude
   

7. Configure Git to ignore the same things as Mercurial:

   $ git config core.excludesfile `pwd`/.hg/hgignore
   

8. Have your master branch track the exported Hg default branch:

   $ git branch --track hg/default master
   $ git reset --hard
   

9. hg-git created a "bare" git repository, even with intree = 1. Change that in .git/config, replace bare = true by bare = false.

10. Do stuff in Git and make commits

11. Export your changes to Hg:

    $ hg gimport
    

12. Push them out to the world:

    $ hg push