[Rd] Fwd: Using existing envars in Renviron on friendly Windows

Ivan Krylov kry|ov@r00t @end|ng |rom gm@||@com
Fri Oct 15 18:40:37 CEST 2021

Sorry for the noise! I wasn't supposed to send my previous message.

On Fri, 15 Oct 2021 16:44:28 +0200
Michał Bojanowski <michal2992 using gmail.com> wrote:

> AVAR=${APPDATA}/foo/bar
> Which is a documented way of referring to existing environment
> variables. Now, with that in R I'm getting:
> Sys.getenv("APPDATA")    # That works OK
> [1] "C:\\Users\\mbojanowski\\AppData\\Roaming"
> so OK, but:
> Sys.getenv("AVAR")
> [1] "C:UsersmbojanowskiAppDataRoaming/foo/bar"

Hmm, a function called by readRenviron does seem to remove backslashes,
but not if they are encountered inside quotes:


Would AVAR="${APPDATA}"/foo/bar work?

Best regards,

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