Re: [RFC PATCH v5] Implement --first-parent for git rev-list --bisect

[Johannes Schindelin <Johannes.Schindelin@gmx.de>]

Hi Junio,

On Wed, 27 Jun 2018, Junio C Hamano wrote:

> Johannes Schindelin <Johannes.Schindelin@gmx.de> writes:
> 
> > 	git rev-list --bisect-all --first-parent F..E >revs &&
> > 	# only E, e1..e8 should be listed, nothing else
> > 	test_line_count = 9 revs &&
> > 	for rev in E e1 e2 e3 e4 e5 e6 e7 e8
> > 	do
> > 		grep "^$(git rev-parse $rev) " revs || return
> > 	done
> >
> > I am faster by... a lot. Like, seconds instead of minutes.
> 
> I'm fine either way.  I just thought you would not want 9 separate
> invocations of grep ;-)

I don't.

I like the unnecessary test_commit calls even less ;-)

And yes, we could avoid those `grep` calls, I know. By something as
convoluted as

	revs="$(cat revs)" &&
	for rev in $(git rev-parse E e1 e2 e3 e4 e5 e6 e7 e8)
	do
		case "$LF$revs" in
		*"$LF$rev "*) ;; # okay
		*) echo "Missing: $rev">&2; return 1;;
		esac
	done

Is this really what you would call an easy-to-understand test? Maybe for
you, a Unix oldtimer and shell scripting king.

Ciao,
Dscho