Re: [boost] A proposal for superproject structure and testing

On Monday 09 December 2013 19:29:59 Alexander Lamaison wrote:

Vladimir Prus writes:

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On 09.12.2013 21:17, Alexander Lamaison wrote:

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Because, if so, that's not possible with git. Branches are just nicknames for particular commits. They can come and go pretty much as they please without disrupting other things. Submodules reference a _commit_ and the commits remain in the repository regardless of what happens to the branches.

Then what does 'git gc' do?

Good point. I forgot about this. So, in general, the referenced submodule needs to include the commit in _some_ branch for the superproject to definitely reference a valid commit.

However, I think the discussion was about a commit already merged to the submodule's master branch, so gc won't touch it.

Not necessarily. In my example a boost release (i.e. a tagged commit to the superproject's master) references a commit in a submodule branch that is neither develop nor master. That branch may never be merged to develop or master.