Re: problems GIT_TRACE

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Matthias Lederhofer <matled@xxxxxxx> writes:

> I just discovered a problem with GIT_TRACE.  Some scripts redirect
> stderr to stdout and the trace messages go with it.  For example from
> git-repack:
>> name=$(git-rev-list --objects --all $rev_list 2>&1 |
>>         git-pack-objects --non-empty $pack_objects .tmp-pack) ||
>>         exit 1
> Then for example git-pack-objects complains:
>> fatal: expected sha1, got garbage:
>>  trace: built-in: git 'rev-list' '--objects' '--all'
> git-grep '2>&' shows a few other places that do this too, I'll take a
> closer look at this later.  Is there any reason to redirect stderr to
> stdout?  I think this will always fail with such a strange error
> message when something is written to stderr.

This particular one is trying to catch an error condition from
rev-list.  Shell reports the exit status from the last command
in the pipeline, and when rev-list notices a corrupt repository,
it wants to tell pack-objects to stop producing incorrect pack,
but there is no way other than sending a garbage string (as an
error message) to cause pack-object to notice there is garbage
coming in.


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