[R-sig-Fedora] Scrolling in Help System Doesn't Work

[Pierre-Yves Chibon]

On Mon, 2011-08-08 at 12:53 -0400, Tom Callaway wrote:
> On 08/08/2011 12:50 PM, peter dalgaard wrote:
> >
> > On Aug 8, 2011, at 17:13 , Tom Callaway wrote:
> >
> >> On 08/05/2011 11:56 PM, Michael Smith wrote:
> >>> On my old F13 box, R 2.13.0 still uses "less" by default. Since "less"
> >>> is often regarded as a more sophisticated version of "more", I wonder
> >>> why this change has been made.
> >>
> >> The change is not Fedora specific, we use the default Environ from upstream.
> >>
> >
> > But that is generated by configure, which does
> >
> > configure:for ac_prog in ${PAGER} less more page pg
> >
> > so if it ends up with "more" as the default, I'd say that the test for "less" failed in the build environment. Either that or the shell itself sets PAGER to "more".
> >
> > (Conversely, you can always override it by "export PAGER=less" before starting R, or Sys.setenv(PAGER="less"), etc.)
> 
> Aha! Okay, so that's easy enough to fix. Not really worthy of pushing an 
> update for, but I'll update the spec file in git so that on the next 
> update, less will be present in the buildroot.

On Fedora 14
$ grep -i pager /usr/lib64/R/etc/Renviron
## Default pager
PAGER=${PAGER-'/usr/bin/less'}

On Fedora 15
$ grep -i pager /usr/lib64/R/etc/Renviron
## Default pager
PAGER=${PAGER-'/bin/more'}

So the change happened in between.

Pierre