Purge individual line items from checksums file
.purge(checkSums, purge, targetFile, archive, alsoExtract, url)A checksums file, e.g., created by Checksums(..., write = TRUE)
Logical or Integer. 0/FALSE (default) keeps existing
CHECKSUMS.txt file and
prepInputs will write or append to it. 1/TRUE will deleted the entire
CHECKSUMS.txt file. Other options, see details.
Character string giving the path to the eventual file
(raster, shapefile, csv, etc.) after downloading and extracting from a zip
or tar archive. This is the file before it is passed to
postProcess. Currently, the internal checksumming does not checksum
the file after it is postProcessed (e.g., cropped/reprojected/masked).
Using Cache around prepInputs will do a sufficient job in these cases.
Optional character string giving the path of an archive
containing targetFile, or a vector giving a set of nested archives
(e.g., c("xxx.tar", "inner.zip")). If there is/are (an) inner
archive(s), but they are unknown, the function will try all until it finds
the targetFile
Optional character string indicating the URL to download from.
Normally, if used within a module, this url should be explicitly given as
sourceURL for an expectsInput. In that case, it will use the
module's checksums file to confirm that the download occurred correctly. If
URL is used here, an ad hoc checksums will be created in the
destinationPath. This will be used in subsequent calls to
prepInputs, comparing the file on hand with the ad hoc
CHECKSUMS.txt.