This functions gives the user a chance to make the output file writeable before a write attempt is actually made by R to avoid having run the whole program again upon write failure.
wait_for_writable(
filename,
prompt_text = paste0("The file '", filename,
"' is not writable. Please close all applications using this file. Press '",
abort_answer, "' to abort!"),
abort_answer = "n"
)The file to test for writable
If not writable, show this prompt text to the user
If the user enters this string into the prompt, this function will stop()
TRUE if writable, FALSE if aborted by user or (not-writeable and non-interactive)
Note: The file will not be overwritten or changed by this function.