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Delete Stray 'nul' Files

Source: R/keep_only.R
delete_nul_files.Rd

Windows-only. knitr occasionally leaves behind a file literally named nul as a side effect of redirecting output to the Windows NUL device. This deletes files whose *basename* is exactly "nul" (case-insensitive) under path.

Usage

delete_nul_files(
  path = here::here(),
  .dontask = FALSE,
  .verify_command = FALSE
)

Arguments

path

Directory to search, defaults to here::here().

.dontask

Logical (default FALSE); skip the confirmation prompt.

.verify_command

Logical (default FALSE); if TRUE, return the paths that would be deleted, in device-namespace form, and delete nothing.

Value

Invisibly, the deleted file paths (or, if .verify_command = TRUE, the paths that would be deleted). An error lists any file that could not be deleted.

Details

The files are deleted from R, through their Windows device-namespace path (a plain path to such a file is taken for the NUL device itself), not by handing a command to cmd.exe, so a folder name that holds percent signs, such as x%TEMP%y, is safe. Folders that are reached through a link (a junction or symbolic link inside path that points elsewhere) are skipped, so nothing outside path is deleted.