The solution to this question is to set environmental variable R_ENVIRON
that point to the .Renviron file. I should read the ?Startup more carefully.
Best,
Jinsong
On 2020/8/31 3:45, Henrik Bengtsson wrote:
Sorry, I should retract my claim that it's too late to set TMPDIR in
.Renviron. It does indeed work on Linux and R 4.0.2, e.g.
$ cd
$ mkdir test
$ cd test
$ echo "TMPDIR=$PWD" > ./.Renviron
$ cat ./.Renviron
TMPDIR=/home/hb/test
Rscript --no-init-file -e "tempdir()"
[1] "/home/hb/test/RtmpyH47tc"
Hmm... either this has changed "recently" or I've got it wrong all the
time. Eitherway, I need to revise the vignette in my 'startup'
package.
Sorry for the misleading comment.
So, back to your comment about it does *not* work, that is,
~/.Renviron is not read, when you double-click on an .RData file. I
just tried with R 4.0.2 in a Windows 10 VM and I think I can reproduce
what you're describing.
The problem seems to be that when one launches Rgui via
double-clicking .RData, the Rgui will only read ./.Renviron, that is,
the .Renviron file that is located in the same folder as the .RData
file. It will never load ~/.Renviron (e.g.
C:/Users\alice/Documents/.Renviron) unless the .RData file is in that
folder too.
This looks odd to me but it could be that I made another mistake in my
conclusions above. I let someone else with a less mushy brain take
over from here.
/Henrik
On Sat, Aug 29, 2020 at 4:31 PM Jinsong Zhao <jsz...@yeah.net> wrote:
I read the help page, I don't understand it very well, since I set the
environmental variable TMPDIR in .Renviron. What confused me is when
double clicking the *.RData to launch R, the tempdir() does not respect
the environmental variable TMPDIR, but launch R by double clicking Rgui
icon does.
Best,
Jinsong
On 2020/8/30 0:36, Henrik Bengtsson wrote:
It is too late to set TMPDIR in .Renviron. It is one of the
environment variables that has to be set prior to launching R. From
help("tempfile", package = "base"):
The environment variables TMPDIR, TMP and TEMP are checked in turn and
the first found which points to a writable directory is used: if none
succeeds ‘/tmp’ is used. The path should not contain spaces. **Note
that setting any of these environment variables in the R session has
no effect on tempdir(): the per-session temporary directory is created
before the interpreter is started.**
/Henrik
On Sat, Aug 29, 2020 at 6:40 AM Jinsong Zhao <jsz...@yeah.net> wrote:
Hi there,
When I started R by double clicking on Rgui icon (I am on Windows), the
tempdir() returned the tmpdir in the directory I set in .Renviron. If I
started R by double clicking on a *.RData file, the tempdir() return the
tmpdir in the directory setting by Windows system. I don't know whether
it's designed.
> sessionInfo()
R version 4.0.2 (2020-06-22)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 18363)
...
Best,
Jinsong
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