download_unpack {gms}

Download and unpack compressed data from repositories

Description

Downloads a list of tgz files from a list of repos and unpacks them. If a file is no .tgz-file it will be only downloaded.

Usage

download_unpack(
  input,
  targetdir = "input",
  repositories = NULL,
  debug = FALSE,
  unpack = TRUE,
  stopOnMissing = FALSE
)

Arguments

input

a vector of files to be downloaded or a cfg list with settings to be used (e.g. containing cfg$input, cfg$repositories). Settings in the config list will be overwritten by other arguments of this function if they are not set to NULL

targetdir

directory the files should be downloaded and extracted to

repositories

a list of repositories (please pay attention to the list format!) in which the files should be searched for. Files will be searched in all repositories until found, always starting with the first repository in the list. The argument must have the format of a named list with the url of the repository as name and a corresponding list of options such as username or password to access the repository as value. If no options are required the value has to be NULL. (e.g. list("ftp://my_pw_protected_server.de/data"=list(user="me",password=12345), "http://free_server.de/dat"=NULL))

debug

switch for debug mode with additional diagnostic information

unpack

if switched off the source files are purley downloaded

stopOnMissing

Boolean indicating whether to stop if any file in files could not be downloaded. Off (FALSE) by default.

Value

Information about the download process in form of a data.frame with data sets as row names and repositories (where it was downloaded from) and corresponding md5sum as columns

Author(s)

Jan Philipp Dietrich