[Buildroot] [PATCH 1/2] git: fix handling of git repos using master as version

[Thomas Petazzoni <thomas.petazzoni@bootlin.com>]

Hello,

On Tue, 5 Jun 2018 00:19:41 +0200, Arnout Vandecappelle wrote:

> >> $ git ls-remote git at gitlab.com:adhlinux/buildroot/buildroot.git master
> >> 407fb2fe202aaeb273e4986dc88c30596a7fe8db    refs/heads/master
> >> 407fb2fe202aaeb273e4986dc88c30596a7fe8db    refs/remotes/upstream/master  
> > 
> > Yes 'ls-remote' is actually a good option.   
> 
>  It's a bit racy though. By the time you do the actual fetch, the remote branch
> may already have been updated by someone else.

And ?

Even if you get the latest commit in the branch, by the time the build
is finished, someone might have pushed some other changes.

There's nothing racy here: you are going to build the latest commit at
the moment of git ls-remote. There might obviously be further commits
made later on, either during the build or after the build. Whether
those commits were made right between ls-remote and the actual build,
or during the build, or after the build doesn't really matter.

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com