[Rd] Addition of a meta viewport tag to HTML manuals

Kurt Hornik Kurt@Horn|k @end|ng |rom wu@@c@@t
Sun Jul 21 14:15:14 CEST 2019

>>>>> Bob Rudis writes:

> Thanks for both the support & sage advice, Martin!
> And, aye, tis straightforward to convert the perl one-liner to a
> shell/sed idiom.

> A kind soul from the list has also offered to walk me through the
> "provide a patch" process and I'll do my best to get it right on Par 1
> :-)

When building HTML from the Texinfo sources, we already have a sed
script in place: we can easily teach it to also add the HTML5 viewport
meta tag as suggested.

I'll do so after more checking ...


> -Bob

> On Mon, Jul 15, 2019 at 5:54 AM Martin Maechler
> <maechler using stat.math.ethz.ch> wrote:
>> >>>>> Bob Rudis
>> >>>>>     on Tue, 9 Jul 2019 14:24:24 -0400 writes:
>> > The addition of a single line:
>> > <meta name="viewport" content="width=device-width, initial-scale=1.0">
>> > at in the <head> of the R HTML generated manuals would make them much easier to read on mobile devices.
>> > texi2any (which generates the HTML files) is based on long-working Perl code that includes many modern HTML elements but does not include this one.
>> > A Perl one-liner in the install-html: Makefile directive in Makefile.in:
>> > install-html: installdirs
>> > @for f in $(OBJECTS_HTML); do \
>> > if test -f $${f} ; then \
>> > $(INSTALL_DATA) $${f} "$(DESTDIR)$(rdocdir)/manual"; \
>> > perl -pi -e 's/\<meta name="desc/<meta name="viewport" content="width=device-width, initial-scale=1.0">\n<meta name="desc/' "$(DESTDIR)$(rdocdir)/manual/*.html"; \
>> > fi \
>> > done
>> > would insert this (I still need to read Makefile.win to see where it should go there) and I'd be glad to create a PR unless folks do not think better accessibility on mobile is a good idea.
>> To the contrary.
>> Thank you very much, Bob, for bringing this up, here!
>> > $(PERL) does not seem to be defined but Perl itself is a requirement for texi2any so it is definitely something that would work in the current installation process.
>> > -Bob
>> Hmm,.. a very long time ago,  perl was an absolute requirement
>> for building R from the sources, but in the mean time, it's not
>> been required anymore strictly *).  AFAIK, there are alternative versions
>> of versions/alternatives to texi2any  (say on Windoze .. or
>> bizarre Linux distros or non-linux unices), and I'm almost sure
>> we do not want to require perl explicitly.
>> We are using R itself in many places for installation things,
>> but here, it should be possible to use smaller unix tools (such
>> as 'sed' and 'grep' say) instead.
>> If you (or someone else) provided a small patch for using those
>> instead of perl, I don't see a reason not to be grateful and
>> apply it to the sources.
>> Thank you once more
>> Martin
>> --
>> *)  perl is mentioned twice in the "R Administration and
>> Installation" manual:
>> 1. maybe needed for 'install-info'  *if* there's no
>> 'install-info' command on the system [but on my Fedora and
>> probably most "math-y" Linux dist there is a binary]
>> 2. On Windoze, the texinfo 5.x package needs perl

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