This function sets the root directory to a user-specified path or, if not provided, prompts the user to enter the root directory interactively. The directory path is stored in a global option called root_directory and is also returned.
Value
The root directory (character string), invisibly. It is also stored globally in the option root_directory.
Details
This function uses either a user-specified path or a path provided interactively to set the root directory. The path is validated to ensure that it exists. Once validated, the path is stored in the global option root_directory, which can be accessed using getOption("root_directory"). If the path is invalid (i.e., it does not exist), the function throws an error.
Examples
if (FALSE) { # \dontrun{
# Set and display the root directory interactively
root_dir <- set_root_directory()
cat("Root directory:", root_dir, "\n")
# Set the root directory programmatically
root_dir <- set_root_directory("/path/to/root")
cat("Root directory:", root_dir, "\n")
# Access the root directory from the global options
getOption("root_directory")
} # }