extract_files: Extract files matching a pattern
In paleolimbot/rfuncs: Useful R Functions Accordin to paleolimbot

Description Usage Arguments Value Examples

Extracts files matching a pattern from a directory, copying and/or removing duplicate files (based on a user-supplied function) if specified. If a destination directory is specified, files will be copied (and not overwritten, even if filenames are identical).

1 2	extract_files(source_dir, pattern, destination_dir = NULL, remove_duplicates = FALSE, unique_fun = NULL, verbose = TRUE)

`source_dir`	the directory to look for the files
`pattern`	the pattern of files (NULL for all files) to extract
`destination_dir`	the directory to which files will be copied (NULL if files should not be copied)
`remove_duplicates`	TRUE if duplicate files (based on the function supplied in unique_fun) should be removed from the list (they will not be deleted). If destination_dir is specified, the duplicate files will not be copied. If a file to be copied already exists in destination_dir (as determined by unique_fun), the file will not be copied but the name of the existing file will be included in the list of files returned.
`unique_fun`	the function that will return a unique value for unique files. the most reliable is probably tools::md5sum() (the default), but for large files this is slow and file.size() may be adequate. In some cases basename() may also be sufficient.
`verbose`	TRUE if status messages should be printed.

A list of file paths. If destination_dir is specified, the list of file paths will be to the copied files. If not, the list of file paths will be relative to the working directory.