[core-workflow] Time to decide how to convert hg repos to git

[Senthil Kumaran]

Hello Core-Workflow Group,

On Fri, Apr 22, 2016 at 6:45 PM, Senthil Kumaran wrote:

>
> Here's my plan and a to do:
>
> 1. Even though it is a one-time operation, I plan to convert above steps
> into a trivial tool that we can use and verify independently.
> 2. Once we are satisfied with our local trials, you could use this tool
> once to convert the hg repo and push to canonical git repo.
>

This was the tool I mentioned in the above point.

https://github.com/orsenthil/cpython-hg-to-git

I used this to test migration of small hg repos to github repos and
operations were successful. As a test, I could migrate Cpython repo, but it
took multiple hours on a fast machine. I assume it is due to python and
subprocess overhead. The faster way is to just use hg-git extension
directly follow steps documented in the orsenthil/cpython-hg-to-git repo
for the sake of consistency.

Brett and I discussed that we might need a way to verify if two repos, hg
and git repos are same (that's have the same graph) as we undertake this
process. I don't know any offhand comparison commands, but I assume it
should be possible. I plan to add that to that tool.

Please share your comments.

Thank you,
Senthil
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