Extract contents of an archive to a directory

Extract contents of an archive to a directory

archive_extract(
  archive,
  dir = ".",
  files = NULL,
  options = character(),
  strip_components = 0L
)

Arguments

archive

character(1) The archive filename or an archive object.

dir

character(1) Directory location to extract archive contents, will be created if it does not exist.

files

character() || integer() || NULL One or more files within the archive, specified either by filename or by position.

options

character() default: character(0) Options to pass to the filter or format. The list of available options are documented in options can have one of the following forms:

• option=value The option/value pair will be provided to every module. Modules that do not accept an option with this name will ignore it.

• option The option will be provided to every module with a value of "1".

• !option The option will be provided to every module with a NULL value.

• module:option=value, module:option, module:!option As above, but the corresponding option and value will be provided only to modules whose name matches module. See read options for available read options See write options for available write options

strip_components

Remove the specified number of leading path elements. Pathnames with fewer elements will be silently skipped.

Value

The filenames extracted (invisibly).

Details

If files is NULL (the default) all files will be extracted.

Examples

a <- system.file(package = "archive", "extdata", "data.zip")
d <- tempfile()

# When called with default arguments extracts all files in the archive.
archive_extract(a, d)
list.files(d)
#> [1] "airquality.csv" "iris.csv"       "mtcars.csv"    
unlink(d)

# Can also specify one or more files to extract
d <- tempfile()
archive_extract(a, d, c("iris.csv", "airquality.csv"))
list.files(d)
#> [1] "airquality.csv" "iris.csv"      
unlink(d)