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

[Ben Bolker]

Not sure, but I think the 'here' package might do what you want. It's
tidyverse-affiliated but pretty stable

On Thu, Nov 23, 2023, 2:39 PM Tony Wilkes <tony_a_wilkes using outlook.com> wrote:

> 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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