On 2026-01-14 12:55 a.m., Andrew Johnson wrote:
Hi all!
I have an R package which uses several JS scripts/libraries, and I'm trying to
configure the build process to minify the JS files at build-time (via my
jsutils package: https://cran.r-project.org/web/packages/jsutils/).
My current approach is using a configure script to run the minification, with
the jsutils package added as an Import
(https://github.com/AUS-DOH-Safety-and-Quality/controlcharts/pull/25). But this
adds an additional runtime dependency when it's only needed at build time.
Are there any recommended ways for specifying build-time dependencies when the
package doesn't require compilation? My attempts to use the LinkingTo field so
far are giving check notes for not having source or include files.
Any suggestions are much appreciated!
The rgl package keeps Javascript code deep down within the inst
directory, and uses R code calling js::uglify_files to minify them.
Remember that building a package entails running every .R file in the R
directory. In most cases that just executes function definitions, but
it can also execute other code involved in building. So rgl defines a
function rgl::makeDependency(), then calls things like
CanvasMatrixDependency <- makeDependency("CanvasMatrix4",
src = "htmlwidgets/lib/CanvasMatrix",
script = "CanvasMatrix.src.js",
package = "rgl",
debugging = isTRUE(as.logical(Sys.getenv("RGL_DEBUGGING", "FALSE"))))
to minify it and record the information used by htmlwidgets to handle
dependencies. The makeDependency() function is exported from rgl, and
might be useful as a model for the kinds of things you should do. If
you're using htmlwidgets, then you might be able to use it as-is.
Duncan Murdoch
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