Junio C Hamano [mailto:gits...@pobox.com] writes:

>> I have read that this restriction was made for some kind of security
>> reason, and one possibility would be to add a config option on the
>> server repo to turn off this safety check. As we manage the git repos
>> ourselves, this would be perfectly ok for us.
>> What is the current status of this - is there already such a config option?
>No, there isn't.
>I am no going to say that such a change will never happen, but you may want
>to rethink the way you transfer the source material to your build system,
>especially your build system is rebuilding each and every versions of the
>I can understand that the use of "git archive" can give you a way to start from
>an empty directory and build afresh for every version, but it is stupid to
>_transfer_ the full copy of the source material
>300 times over the network in order to rebuild 300 versions a day, all of which
>will be quite similar to each other (after all, the difference between them 
>be limited by the productivity of your workforce).

Our build system creates an embedded firmware image similar to OpenEmbedded or 
OpenWrt. There all components (including boot loader, kernel, busybox and many 
other third party components) are compiled during nightly builds. Each 
component has its own GIT repository on the server and our build system 
references those components via SHA-1 sums. Many of those components do almost 
NEVER change (we do not update the Linux kernel every day), so most of this 
code must only be fetched once using git archive.

>Fortunately, it is quite simple to fix.  You can maintain a single bare 
>on the build machine (i.e. the one you currently run "git archive --remote"
>on), and run "git fetch --mirror" against the machine that hosts the repository
>(i.e. the one you currently run "git archive --remote" against) to keep it up 
>date.  That way, you should be able to drastically cut the amount of the
>network traffic from the source repository and the build server.

I know that I could workaround this by mirroring all repositories locally, but 
it is much more convenient to use git archive right away. I agree that once the 
repos are mirrored, there is less traffic on the network, but traffic has not 
been an issue for us so far. Also, a complete mirror of all involved 
repositories will be much larger than just the exported tar archives (e.g. 
Linux kernel repo is 770MB, while the tar.gz is just 96MB).

It was a really nice feature of GIT and it is just too bad that it is no longer 

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