[R-pkg-devel] R CMD check halts on @example in shiny::runApp()

Hello all:

R CMD check does not complete for my package and halts at the line "*
checking examples ..." I suspect the halting is due to @examples
hanging in certain R/foo.R files, where shiny::runApp() is called for
a shiny app located in a separate directory in this type of format:

appDir <- system.file("shiny-examples", "plotLitreApp", package =
"bigPint")
shiny::runApp(appDir, display.mode = "normal")

I suspect this is the problem because I previously had \dontrun{}
around my @examples that used shiny apps and R CMD check worked fine.
When I run the example code for these shiny apps directly into R, the
shiny app works no problem. An example of one such R/foo.R file
causing this hanging problem is located in the developing package at:

https://github.com/lrutter/bigPint/blob/master/R/plotLitreApp.R

Any advice on how to successfully use the @examples for this script
and not halt R CMD check would be much appreciated!

Thank you!...
Lindsay

Hi Lindsay,

this is normal and to be expected, as shiny blocks R and shifts focus to the browser. This only makes sense in interactive modus, as your app needs input from a user before it does anything.

So for your shiny examples, you always have to use \dontrun{}.
Cheers
Joris

On Mon, Nov 19, 2018 at 3:14 PM L Rutter <lindsayannerutter at gmail.com> wrote:

Hello all:

R CMD check does not complete for my package and halts at the line "*
checking examples ..." I suspect the halting is due to @examples
hanging in certain R/foo.R files, where shiny::runApp() is called for
a shiny app located in a separate directory in this type of format:

appDir <- system.file("shiny-examples", "plotLitreApp", package = "bigPint")
shiny::runApp(appDir, display.mode = "normal")

I suspect this is the problem because I previously had \dontrun{}
around my @examples that used shiny apps and R CMD check worked fine.
When I run the example code for these shiny apps directly into R, the
shiny app works no problem. An example of one such R/foo.R file
causing this hanging problem is located in the developing package at:

https://github.com/lrutter/bigPint/blob/master/R/plotLitreApp.R

Any advice on how to successfully use the @examples for this script
and not halt R CMD check would be much appreciated!

Thank you!...
Lindsay

--
Joris Meys
Statistical consultant

Department of Data Analysis and Mathematical Modelling
Ghent University
Coupure Links 653, B-9000 Gent (Belgium)

tel: +32 (0)9 264 61 79
-----------
Biowiskundedagen 2017-2018
http://www.biowiskundedagen.ugent.be/

-------------------------------
Disclaimer : http://helpdesk.ugent.be/e-maildisclaimer.php

Hello all:

R CMD check does not complete for my package and halts at the line "*
checking examples ..." I suspect the halting is due to @examples
hanging in certain R/foo.R files, where shiny::runApp() is called for
a shiny app located in a separate directory in this type of format:

appDir <- system.file("shiny-examples", "plotLitreApp", package = "bigPint")
shiny::runApp(appDir, display.mode = "normal")

I suspect this is the problem because I previously had \dontrun{}
around my @examples that used shiny apps and R CMD check worked fine.
When I run the example code for these shiny apps directly into R, the
shiny app works no problem. An example of one such R/foo.R file
causing this hanging problem is located in the developing package at:

https://github.com/lrutter/bigPint/blob/master/R/plotLitreApp.R

Any advice on how to successfully use the @examples for this script
and not halt R CMD check would be much appreciated!