R Under development (unstable) (2023-11-16 r85542 ucrt) -- "Unsuffered Consequences"
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> library("R.utils")
Loading required package: R.oo
Loading required package: R.methodsS3
R.methodsS3 v1.8.2 (2022-06-13 22:00:14 UTC) successfully loaded. See ?R.methodsS3 for help.
R.oo v1.25.0 (2022-06-12 02:20:02 UTC) successfully loaded. See ?R.oo for help.

Attaching package: 'R.oo'

The following object is masked from 'package:R.methodsS3':

    throw

The following objects are masked from 'package:methods':

    getClasses, getMethods

The following objects are masked from 'package:base':

    attach, detach, load, save

R.utils v2.12.3 successfully loaded. See ?R.utils for help.

Attaching package: 'R.utils'

The following object is masked from 'package:utils':

    timestamp

The following objects are masked from 'package:base':

    cat, commandArgs, getOption, isOpen, nullfile, parse, warnings

> 
> # Set new default repositories for this test
> orepos <- options(repos=c(
+   CRAN="http://cran.r-project.org",
+   EXAMPLE="http://example.org"
+ ))
> 
> message("Current repositories:")
Current repositories:
> str(as.list(getOption("repos")))
List of 2
 $ CRAN   : chr "http://cran.r-project.org"
 $ EXAMPLE: chr "http://example.org"
> 
> message("All current repositories:")
All current repositories:
> withRepos({
+   str(as.list(getOption("repos")))
+ })
List of 5
 $ CRAN     : chr "http://cran.r-project.org"
 $ CRANextra: chr "https://www.stats.ox.ac.uk/pub/RWin"
 $ BioCsoft : chr "https://bioconductor.org/packages/3.18/bioc"
 $ BioCann  : chr "https://bioconductor.org/packages/3.18/data/annotation"
 $ BioCexp  : chr "https://bioconductor.org/packages/3.18/data/experiment"
> 
> message("All current repositories (explicit):")
All current repositories (explicit):
> withRepos({
+   str(as.list(getOption("repos")))
+ }, repos="[[current]]")
List of 2
 $ CRAN   : chr "http://cran.r-project.org"
 $ EXAMPLE: chr "http://example.org"
> 
> message("CRAN (only):")
CRAN (only):
> withRepos({
+   str(as.list(getOption("repos")))
+ }, repos="CRAN")
List of 1
 $ CRAN: chr "http://cran.r-project.org"
> 
> 
> message("braju.com (only):")
braju.com (only):
> withRepos({
+   str(as.list(getOption("repos")))
+ }, repos="braju.com")
List of 1
 $ braju.com: chr "https://braju.com/R"
> 
> message("CRAN and braju.com (only):")
CRAN and braju.com (only):
> withRepos({
+   str(as.list(getOption("repos")))
+ }, repos=c("CRAN", "braju.com"))
List of 2
 $ CRAN     : chr "http://cran.r-project.org"
 $ braju.com: chr "https://braju.com/R"
> 
> message("braju.com and CRAN (only):")
braju.com and CRAN (only):
> withRepos({
+   str(as.list(getOption("repos")))
+ }, repos=c("braju.com", "CRAN"))
List of 2
 $ braju.com: chr "https://braju.com/R"
 $ CRAN     : chr "http://cran.r-project.org"
> 
> 
> message("All CRAN replated repositories (only):")
All CRAN replated repositories (only):
> withRepos({
+   str(as.list(getOption("repos")))
+ }, repos="[[CRAN]]")
List of 2
 $ CRAN     : chr "http://cran.r-project.org"
 $ CRANextra: chr "https://www.stats.ox.ac.uk/pub/RWin"
> 
> message("Mainstream (CRAN and BioC related) repositories (only):")
Mainstream (CRAN and BioC related) repositories (only):
> withRepos({
+   str(as.list(getOption("repos")))
+ }, repos="[[mainstream]]")
List of 5
 $ CRAN     : chr "http://cran.r-project.org"
 $ CRANextra: chr "https://www.stats.ox.ac.uk/pub/RWin"
 $ BioCsoft : chr "https://bioconductor.org/packages/3.18/bioc"
 $ BioCann  : chr "https://bioconductor.org/packages/3.18/data/annotation"
 $ BioCexp  : chr "https://bioconductor.org/packages/3.18/data/experiment"
> 
> message("braju.com and mainstream (only):")
braju.com and mainstream (only):
> withRepos({
+   str(as.list(getOption("repos")))
+ }, repos="[[braju.com]]")
List of 6
 $ braju.com: chr "https://braju.com/R"
 $ CRAN     : chr "http://cran.r-project.org"
 $ CRANextra: chr "https://www.stats.ox.ac.uk/pub/RWin"
 $ BioCsoft : chr "https://bioconductor.org/packages/3.18/bioc"
 $ BioCann  : chr "https://bioconductor.org/packages/3.18/data/annotation"
 $ BioCexp  : chr "https://bioconductor.org/packages/3.18/data/experiment"
> 
> message("R-Forge and mainstream (only):")
R-Forge and mainstream (only):
> withRepos({
+   str(as.list(getOption("repos")))
+ }, repos="[[R-Forge]]")
List of 6
 $ R-Forge  : chr "https://R-Forge.R-project.org"
 $ CRAN     : chr "http://cran.r-project.org"
 $ CRANextra: chr "https://www.stats.ox.ac.uk/pub/RWin"
 $ BioCsoft : chr "https://bioconductor.org/packages/3.18/bioc"
 $ BioCann  : chr "https://bioconductor.org/packages/3.18/data/annotation"
 $ BioCexp  : chr "https://bioconductor.org/packages/3.18/data/experiment"
> 
> message("An explicit repository URL:")
An explicit repository URL:
> withRepos({
+   str(as.list(getOption("repos")))
+ }, repos="http://r-forge.r-project.org")
List of 1
 $ : chr "http://r-forge.r-project.org"
> 
> message("An explicit repository URL + mainstream:")
An explicit repository URL + mainstream:
> withRepos({
+   str(as.list(getOption("repos")))
+ }, repos=c("http://r-forge.r-project.org", "[[mainstream]]"))
List of 6
 $          : chr "http://r-forge.r-project.org"
 $ CRAN     : chr "http://cran.r-project.org"
 $ CRANextra: chr "https://www.stats.ox.ac.uk/pub/RWin"
 $ BioCsoft : chr "https://bioconductor.org/packages/3.18/bioc"
 $ BioCann  : chr "https://bioconductor.org/packages/3.18/data/annotation"
 $ BioCexp  : chr "https://bioconductor.org/packages/3.18/data/experiment"
> 
> message("All known:")
All known:
> withRepos({
+   str(as.list(getOption("repos")))
+ }, repos="[[all]]")
List of 9
 $ CRAN      : chr "http://cran.r-project.org"
 $ BioCsoft  : chr "https://bioconductor.org/packages/3.18/bioc"
 $ BioCann   : chr "https://bioconductor.org/packages/3.18/data/annotation"
 $ BioCexp   : chr "https://bioconductor.org/packages/3.18/data/experiment"
 $ CRANextra : chr "https://www.stats.ox.ac.uk/pub/RWin"
 $ R-Forge   : chr "https://R-Forge.R-project.org"
 $ rforge.net: chr "https://www.rforge.net"
 $ braju.com : chr "https://braju.com/R"
 $ EXAMPLE   : chr "http://example.org"
> 
> 
> 
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> # Visibility
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> res <- withVisible({
+   withRepos({ 1 })
+ })
> str(res)
List of 2
 $ value  : num 1
 $ visible: logi TRUE
> stopifnot(all.equal(res$value, 1))
> stopifnot(res$visible)
> 
> x <- 0
> res <- withVisible({
+   withRepos({ x <- 1 })
+ })
> str(res)
List of 2
 $ value  : num 1
 $ visible: logi FALSE
> stopifnot(all.equal(res$value, 1))
> stopifnot(!res$visible)
> stopifnot(all.equal(x, 1))
> 
> 
> # Undo
> options(orepos)
> 
> proc.time()
   user  system elapsed 
   0.42    0.03    0.45