[R-pkg-devel] Question regarding finding the source file location without R-packages outside of R-Studio

[Berry Boessenkool]

According to the description, this should be what you need:
https://cran.r-project.org/web/packages/scriptName/
I only got NULL, but I also only tried within Rstudio...
Here are some related questions, although you've probably already tried the answers:
https://stackoverflow.com/questions/18000708/find-location-of-current-r-file
https://stackoverflow.com/questions/1815606/determine-path-of-the-executing-script

Berry



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________________________________
From: R-package-devel <r-package-devel-bounces using r-project.org> on behalf of Tony Wilkes <tony_a_wilkes using outlook.com>
Sent: Thursday, November 23, 2023 20:39
To: r-package-devel using r-project.org <r-package-devel using r-project.org>
Subject: [R-pkg-devel] Question regarding finding the source file location without R-packages outside of R-Studio

Hi everyone,

I have a question. I hope it's not a stupid question.

Suppose you'd want to perform version control and project isolation. You'd create a project folder (let's call it "MyProject"), and place all the R packages you need for that project inside a subfolder (let's say "MyProject/MyLibrary"). Now you create and run an R-script in "MyProject".
install.packages(), library(), etc. all have a lib.loc argument to specify the library path. So one can manually specify the path of your project, and then you'd have your project isolation and version control fully set-up.

But if I want to set-up the library path automatically, to make it portable, I would need to determine the script location. In RStudio I can use the 'rstudioapi' package, which is very stable, and so does not really require version control. But for outside R-Studio, I have not found a very stable package that also works.
I prefer not using external R packages that requires version control (i.e. a package that changes often-ish): you'd need the package to access the project library, but the project library to access the package.

This brings me to my actual question: is it possible to determine the source file location of an R script outside of R-Studio, without resorting to R packages ? Or else use an R package that is VERY stable (i.e. doesn't change every (half) a year, like tidyverse packages tend to do)? commandArgs() used to contain the script path (apparently), but it doesn't work for me.

By the way: I wish to get the script path in an interactive session.

Thank you in advance.

Kind regards,

Tony


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