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Class for an external unzip process

Source: R/process.R
unzip_process.Rd

unzip_process() returns an R6 class that represents an unzip process. It is implemented as a subclass of processx::process.

Usage

unzip_process()

Value

An unzip_process R6 class object, a subclass of processx::process.

Using the unzip_process class

up <- unzip_process()$new(zipfile, exdir = ".", poll_connection = TRUE,
                           stderr = tempfile(), ...)

See processx::process for the class methods.

Arguments:

  • zipfile: Path to the zip file to uncompress.

  • exdir: Directory to uncompress the archive to. If it does not exist, it will be created.

  • poll_connection: passed to the initialize method of processx::process, it allows using processx::poll() or the poll_io() method to poll for the completion of the process.

  • stderr: passed to the initialize method of processx::process, by default the standard error is written to a temporary file. This file can be used to diagnose errors if the process failed.

  • ... passed to the initialize method of processx::process.

Examples

ex <- system.file("example.zip", package = "zip")
tmp <- tempfile()
up <- unzip_process()$new(ex, exdir = tmp)
up$wait()
up$get_exit_status()
#> [1] 0
dir(tmp)
#> [1] "example"