Re: [PATCH v2] am: add am.signoff add config variable

> > > +       test $(git cat-file commit HEAD | grep -c "Signed-off-by:") -eq 0
> > 
> > and then we check if the top most commit has zero occurrences
> > for lines grepped for sign off. That certainly works, but took me a
> > while to understand (TIL about -c in grep :).
> > 
> > Another way that to write this check, that Git regulars may be more used to is:
> > 
> >     git cat-file commit HEAD | grep "Signed-off-by:" >actual
> >     test_must_be_empty actual
> 
> test_must_be_empty is what I was looking for. But if I do this:
> 
> test_expect_success '--no-signoff overrides am.signoff' '
> 	rm -fr .git/rebase-apply &&
> 	git reset --hard first &&
> 	test_config am.signoff true &&
> 	git am --no-signoff <patch2 &&
> 	printf "%s\n" "$signoff" >expected &&
> 	git cat-file commit HEAD^ | grep "Signed-off-by:" >actual &&
> 	test_cmp expected actual &&
> 	git cat-file commit HEAD | grep "Signed-off-by:" >actual &&
> 	test_must_be_empty actual
> '
> 
> The test fails because the second "grep" command returns a
> non-zero exit code. Any suggestions to avoid that problem in a
> more idiomatic way?