Re: Article about "git bisect run" on LWN

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* Junio C Hamano <gitster@xxxxxxxxx> wrote:

> David Symonds <dsymonds@xxxxxxxxx> writes:
> 
> > On Sat, Feb 7, 2009 at 3:41 PM, Christian Couder
> > <chriscool@xxxxxxxxxxxxx> wrote:
> >
> >> It might be useful to have a list of always good commits too, and use it
> >> like this:
> >>
> >> $ git bisect start <bad> <good> $(cat always_good.txt)
> >> $ git bisect skip $(cat always_skipped.txt)
> >> $ git bisect run ./my_test_script.sh
> >
> > Your test script could just do this at its start instead:
> >
> >   if cat always_good.txt | grep $(rev-parse HEAD); then
> >     exit 0
> >   elif cat always_skipped.txt | grep $(rev-parse HEAD); then
> >     exit 125
> >   fi
> 
> Don't cat a file into grep, please.

I do it all the time not because i dont know about grep's ability
to take a file parameter, but because this way it's just a
special-case of command piping and i can inject other commands as
i extend/edit the command line interactively, etc.

	Ingo
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