We are not actually using the yes utility (think y\ny\ny\ny\ny\ny\n...)
As far as I understand, in this particular use, "yes" and "no" are just
comments. We could also write
: I like banannas ;;
and
! : I do not like anchovies ;;
On Thursday 17 February 2011 17:34, Martin von Zweigbergk wrote:
> On Thu, 17 Feb 2011, Johannes Sixt wrote:
> > Am 2/16/2011 20:51, schrieb Junio C Hamano:
> > > Here is how to write the above more concisely, efficiently and
> > > portably.
> > >
> > > case "$2;" in
> > > *";$1;"*)
> > > echo yes ;;
> > > *)
> > > echo no ;;
> > > esac
> > >
> > > The trailing ';' takes care of the case where cloned_modules has only
> > > one element, in which case you have ";name" in "$2". No need for a
> > > loop.
> >
> > And while you are here, you could make this:
> >
> > list_contains()
> > {
> > case "$2;" in
> > *";$1;"*)
> >
> > : yes ;;
> >
> > *)
> > ! : no ;;
> > esac
> > }
> >
> > and test for the exit code of this function rather than its output at the
> > call site.
>
> According to Brandon Casey: "Some platforms (IRIX 6.5, Solaris 7) do
> not provide the 'yes' utility." See 8648732 (t/test-lib.sh: provide a
> shell implementation of the 'yes' utility, 2009-08-28).
>
>
> /Martin
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