Re: [Qemu-devel] [PATCH 1/6] tests/docker/Makefile.include: fix diff-index call

[Fam Zheng <famz@redhat.com>]

On Tue, 11/01 10:02, Alex Bennée wrote:
> 
> Fam Zheng <famz@redhat.com> writes:
> 
> > On Fri, 10/28 17:33, Alex Bennée wrote:
> >> The whole thing is wrapped inside a call quiet-command as well as being
> >> the actual call taking a --quiet argument so the redirect is
> >> superfluous. For reasons I have yet to determine this also seems to be
> >> causing the source preparation step to skip stashing work tree stuff.
> >>
> >> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
> >>
> >> ---
> >> TODO:
> >>   - properly understand the failure
> >
> > Yep, I don't see the bug on my machine (Fedora 24, git 2.7.4). What about the
> > removed "--"? Does that make a difference for you?
> 
> Nope - it seems to be the &>/dev/null that triggers the problem - but
> only in the Makefile. Running the commands from the command line works
> as expected.
> 
> However why do we need the redirect here anyway considering the call
> quiet-command?

It's to force suppressing output, while quiet-command only suppresses the
echoing of the command itself. Since we have "--quiet" here, does "2>/dev/null"
work for you?

Fam

> 
> >
> >> ---
> >>  tests/docker/Makefile.include | 2 +-
> >>  1 file changed, 1 insertion(+), 1 deletion(-)
> >>
> >> diff --git a/tests/docker/Makefile.include b/tests/docker/Makefile.include
> >> index 3f15d5a..d91e28b 100644
> >> --- a/tests/docker/Makefile.include
> >> +++ b/tests/docker/Makefile.include
> >> @@ -20,7 +20,7 @@ IMAGES ?= %
> >>  # Make archive from git repo $1 to tar.gz $2
> >>  make-archive-maybe = $(if $(wildcard $1/*), \
> >>  	$(call quiet-command, \
> >> -		(cd $1; if git diff-index --quiet HEAD -- &>/dev/null; then \
> >> +		(cd $1; if git diff-index --quiet HEAD; then \
> >>  			git archive -1 HEAD --format=tar.gz; \
> >>  		else \
> >>  			git archive -1 $$(git stash create) --format=tar.gz; \
> >> --
> >> 2.10.1
> >>
> >>
> 
> 
> --
> Alex Bennée