Assert are directory exists — assert_directory_exists • assertions

Assert a directory exists. To assert all directories in a vector exist, see assert_all_directories_exist()

Usage

assert_directory_exists(
  x,
  msg = NULL,
  call = rlang::caller_env(),
  arg_name = NULL
)

Arguments

x: Path to a directory (string)
msg: A character string containing the error message if file x is does not exist
call: Only relevant when pooling assertions into multi-assertion helper functions. See cli_abort for details.
arg_name: Advanced use only. Name of the argument passed (default: NULL, will automatically extract arg_name).

Value

invisible(TRUE) if x is exists and is a directory, otherwise aborts with the error message specified by msg

Examples

try({
assert_directory_exists(system.file("package = assertions")) # PASS
assert_all_directories_exist("foo") # Throws Error
})
#> Error in eval(expr, envir) : Failed to find directory: