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Re: Monotonically increasing counter (was Re: [Contrib PATCH] Add scripts to convert GCC repo from SVN to Git)

On 05/08/2019 16:34, Jakub Jelinek wrote:
On Mon, Aug 05, 2019 at 11:20:09AM -0400, Jason Merrill wrote:
I agree.  But for those who want a monotonically increasing
identifier, there's already one in git: CommitDate.  In the discussion
of this issue four years ago,

While commit date is monotonically increasing, it has the problem that at
certain dates there are very few commits, at others many.  When doing
bisection by hand, one does the revision computation (min+max)/2 in head
(it doesn't have to be precise of course, just roughly, and isn't perfect
either, because in svn all of trunk and branches contribute to the revision
numbers), with dates it would be division into further uneven chunks.

Could we tag the branchpoints, say when we branch off gcc 10, we tag the
branchpoint as tags/r11 and then we could use r11-123 as 123th commit on the
trunk since the branchpoint, and let bugzilla and web redirection handle
those rNN-NNNN style identifiers?
git describe --all --match 'r[0-9]*' ... | sed ...
to map hashes etc. to these rNN-NNNN identifiers and something to map them
back to hashes say for git web?


git rev-list --reverse branchtag..branchname

Will list all the revs on that branch from branchtag through to the head of the branch. I guess you could then count the individual revs on that list to index them.


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