this post was submitted on 06 Nov 2023
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Firefox Development Is Moving From Mercurial To Git (groups.google.com)
submitted 11 months ago by [email protected] to c/[email protected]
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For a long time Firefox Desktop development has supported both Mercurial and Git users. This dual SCM requirement places a significant burden on teams which are already stretched thin in parts. We have made the decision to move Firefox development to Git.

  • We will continue to use Bugzilla, moz-phab, Phabricator, and Lando
  • Although we'll be hosting the repository on GitHub, our contribution workflow will remain unchanged and we will not be accepting Pull Requests at this time
  • We're still working through the planning stages, but we're expecting at least six months before the migration begins
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[–] [email protected] 77 points 11 months ago (1 children)

So it's not really moving from one to the other, it's already on both and they're closing the less popular one.

[–] [email protected] 37 points 11 months ago (1 children)

No. The primary source control is on Mercurial, with a Git interface. But since all patches must go through moz-phab (Phabricator) anyway the Git interface is basically read-only – you can use it to pull the code and you can use Git locally for your development, but you can't use Git to push back into the main repo.

Now the reference repository will switch from their own Mercurial infrastructure to a Github (Git) repository, but the flow will remain the same (Phabricator rather than GitHub pull requests). Nothing will change for devs who were using Git. Devs who were using Mercurial will have to switch to Git.

[–] [email protected] -1 points 11 months ago (1 children)

why didn't they go to Gitlab though? now they will be hosted by microsoft

[–] [email protected] 6 points 11 months ago

the github repo is a mirror to their internal source hosting. github is just the most accessible to a wide audience