R Under development (unstable) (2025-05-01 r88184 ucrt) -- "Unsuffered Consequences"
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> library("R.cache")
R.cache v0.17.0 successfully loaded. See ?R.cache for help.
> setupCacheRootPath <- R.cache:::setupCacheRootPath
> 
> oopts <- options()
> 
> tmpdir <- tempdir()
> setCacheRootPath(path=tmpdir)
> 
> print(getCacheRootPath())
[1] "D:\\temp\\2025_05_02_23_50_16_9901\\RtmpQ72mLl"
> 
> setupCacheRootPath(defaultPath=tmpdir)
> path <- getCacheRootPath(NULL)
> print(path)
[1] "D:\\temp\\2025_05_02_23_50_16_9901\\RtmpQ72mLl"
> stopifnot(identical(path, tmpdir))
> 
> options("R.cache.rootPath"=NULL)
> print(getCacheRootPath())
NULL
> 
> path <- getCacheRootPath(NULL)
> print(path)
NULL
> stopifnot(is.null(path))
> setupCacheRootPath(defaultPath=tmpdir)
> 
> path <- getCacheRootPath(NULL)
> print(path)
[1] "D:\\temp\\2025_05_02_23_50_16_9901\\RtmpQ72mLl"
> stopifnot(identical(path, tmpdir))
> 
> ## Reset
> options(oopts)
> 
> proc.time()
   user  system elapsed 
   0.20    0.03    0.23