> El jun. 30, 2016, a las 19:31, Matthias Braun via cfe-dev
> <cfe-...@lists.llvm.org> escribió:
>
>
>> On Jun 30, 2016, at 4:14 PM, Renato Golin via llvm-dev
>> <llvm-...@lists.llvm.org <mailto:llvm-...@lists.llvm.org>> wrote:
>>
>>
>> On 30 Jun 2016 10:20 p.m., "Robinson, Paul" <paul.robin...@sony.com
>> <mailto:paul.robin...@sony.com>> wrote:
>> > We've since stopped creating the tags, and gotten used to not having
>> > them. We do the 'rev-list --count' trick which mainly gets recorded as
>> > one component of the version number, and it has been working for us.
>>
>> Does that work for sub modules inside the umbrella project?
>>
>> How can you trigger a hook in the umbrella project for commits inside the
>> sub modules?
>>
> First: This is purely about generating sequential revision numbers, it does
> not help setting up a server hook to update the submodule references in the
> meta repository. The point I am trying to make here is that we only need to
> solve the problem of updating the submodule references, and that generating
> sequential ID numbers as an alternative to git hashes is no problem.
>
> As far as I can see we need the following operations for sequential ID
> numbers and they are all easy enough to perform with git on the client side:
>
> 1. Produce revision number for current checkout (to use in tool --version
> output):
> You can put something like
> > echo "#define VERSION $(git rev-list --count HEAD)" > version.h
> in your buildsystem
>
> 2. Convert git hash to revision number:
> git rev-list --count $HASH
>
> 3. Convert revision number $NUM to git hash:
> git rev-list HEAD | tail -n $NUM | head -n 1
I just want to point out another alternative that I often use in my projects:
(Example from buildbot repo I had handy)
$ git describe
v0.9.0b8-579-ge06cac6
The format is "TAG-N-gREV", where TAG is the closest reachable git tag in the
past ("v0.9.0b8"), N is the relative number of revisions past that tag (579),
and REV is the short revision to make it unique and easy to locate ("e06cac6",
the 'g' is a literal character that prefixes the revision). In other words,
that "-579-" represents a monotonically increasing value relative to the named
tag and might serve your purposes.
Jared
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