[LLVMdev] Howdy + GIT

[Owen Anderson]

> On Jan 16, 2015, at 3:26 AM, Erik de Castro Lopo <mle+cl at mega-nerd.com> wrote:
> 
> As for all the reason why the LLVM project does not use Git, I wonder
> why large complex projects like the Linux kernel, Wine, MinGW-w64,
> GHC and many many others don't seem to have any major problems using
> Git.

Lots of projects are also happy with Mercurial, or BZR, or even CVS.

Every open source community has its own established workflows by which developers interact with and ultimately contribute to the mainline repository.  Those workflows, and the common use cases that lead to them, strongly impact what specific SCM arrangements will or will not work.

To take the Linux kernel as an example, they use a very different integration strategy from LLVM that is predicated on having a significant hierarchy of developers whose major roles are to act as integrators for incoming patches.  Obviously they use (and built!) an SCM tool that supports their workflow.

LLVM does *not* use such a workflow.  The outcome of several iterations of this discussion on this list has been that, for the LLVM community’s workflow, the advantages of moving mainline to git have not been seen as substantial versus our current arrangement, and it will lose some features that are useful.

Any re-opening of this discussion needs to address the fundamental question of how switching mainline to git will actively help the LLVM community’s development process, and whether those benefits will outweigh the downsides.

—Owen
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