[Rd] Internet access and R CMD make check-devel

Gábor Csárdi c@@rd|@g@bor @end|ng |rom gm@||@com
Mon Oct 5 19:18:30 CEST 2020

One way would be to comment out these tests, or really turn off the
internet, and then these tests don't run.

Indeed, a successful DNS query does not mean that you can connect to
the internet in general. FWIW pingr::is_online [1] implements a method
that works well. Apple's Captive Portal test page is the best method
to determine if you are online, in my experience.

[1] https://github.com/cran/pingr/blob/4594ce0cd40b6ba69f1bcc2379e0038c38dd710f/R/ping-package.r#L135


On Mon, Oct 5, 2020 at 5:49 PM Thomas J. Leeper <thosjleeper using gmail.com> wrote:
> I am trying to install R on CentOS (either 7 or 8, behavior is the
> same) in an environment behind a firewall and while I am able to run:
> R CMD make check
> I am unable to run:
> R CMD make check-devel
> These latter tests fail. The failure occurs in the internet access
> if() conditional statement in these two tests:
> https://svn.r-project.org/R/trunk/tests/internet.R
> https://svn.r-project.org/R/trunk/tests/internet2.R
> In my environment, nsl("cran.r-project.org") returns a valid, non-null
> value but subsequent commands in those test files do not successfully
> access the internet.
> I'd like to be able to run the full test suite given I am building
> from source. I'm wondering if it's possible to make these conditionals
> more strict so that the conditional tests internet access in a manner
> more similar to how internet access is used in the tests. Would this
> be possible? Or, make tests that require internet access into a
> distinct `check-internet` or similar?
> As an additional reference, the same conditional statement appears to
> also be used in these other tests:
> https://svn.r-project.org/R/trunk/tests/CRANtools.R
> https://svn.r-project.org/R/trunk/tests/libcurl.R
> Thanks,
> -Thomas
> Thomas J. Leeper
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