R Under development (unstable) (2024-10-20 r87250 ucrt) -- "Unsuffered Consequences"
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> 
> testAdd <- function() {
+     ## simple examples of how to add drat information to your session
+     drat::addRepo("CRAN", "https://cloud.rstudio.com")
+     drat::addRepo(c("eddelbuettel", "RcppCore"))
+     
+     print(options("repos"))
+ }
> 
> testInsertLocal <- function() {
+     ## simple test for local (non-GitHub) test
+ 
+     ## that is my localhost setup on Ubuntu
+     localRepo <- "/var/www/html/drat"
+     ## guessing a tarball
+     localSource <- file.path(getwd(), "..", "..",
+                              paste0("drat_", packageVersion("drat"), ".tar.gz"))
+     ## could be generalized via 
+     if (file.exists(localRepo) && file.exists(localSource)) {
+         drat::insertPackage(localSource, localRepo)
+     }
+ }
> 
> testInsertGit <- function() {
+     ## simple test for local git (non-GitHub push) test
+ 
+     ## local gh-pages git dir
+     localGit <- "~/git/drat"
+     localGitSD <- "~/git/drat/src/contrib"
+     ## guessing a tarball
+     localSource <- file.path(getwd(), "..", "..",
+                              paste0("drat_", packageVersion("drat"), ".tar.gz"))
+     ## could be generalized via 
+     if (file.exists(localSource) && file.exists(localGitSD)) {
+         drat::insertPackage(localSource, localGit)
+     }
+ }
> 
> testAdd()
$repos
                                  CRAN                           eddelbuettel 
           "https://cloud.rstudio.com" "https://eddelbuettel.github.io/drat/" 
                              RcppCore 
    "https://RcppCore.github.io/drat/" 

> testInsertLocal()
> testInsertGit()
> 
> proc.time()
   user  system elapsed 
   0.14    0.04    0.17