Automatically Delete Files/Folders

Question

Is there any way to automatically delete all files or folders with few R command lines? I am aware of the unlink() or file.remove() functions, but

Answer 1

For all files in a known path you can:

unlink("path/*")

Answer 2

Using a combination of dir and grep this isn't too bad. This could probably be turned into a function that also tells you which files are to be deleted and gives you a chance to abort if it's not what you expected.

# Which directory?
mydir <- "C:/Test"
# What phrase do you want contained in
# the files to be deleted?
deletephrase <- "deleteme"

# Look at directory
dir(mydir)
# Figure out which files should be deleted
id <- grep(deletephrase, dir(mydir))
# Get the full path of the files to be deleted
todelete <- dir(mydir, full.names = TRUE)[id]
# BALEETED
unlink(todelete)

Answer 3

Maybe you're just looking for a combination of file.remove and list.files? Maybe something like:

do.call(file.remove, list(list.files("C:/Temp", full.names = TRUE)))

And I guess you can filter the list of files down to those whose names match a certain pattern using grep or grepl, no?

Answer 4

dir_to_clean <- tempdir() #or wherever

#create some junk to test it with
file.create(file.path(
  dir_to_clean, 
  paste("test", 1:5, "txt", sep = ".")
))

#Now remove them (no need for messing about with do.call)
file.remove(dir(  
  dir_to_clean, 
  pattern = "^test\\.[0-9]\\.txt$", 
  full.names = TRUE
))

You can also use unlink as an alternative to file.remove.

Answer 5

I quite like here::here for finding my way through folders (especially if I'm switching between inline evaluation and knit versions of an Rmarkdown notebook)... yet another solution:

    # Batch remove files
    # Match files in chosen directory with specified regex
    files <- dir(here::here("your_folder"), "your_pattern") 

    # Remove matched files
    unlink(paste0(here::here("your_folder"), files))