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.
See table in preProcess.
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", "inner.rar")). If there is/are (an) inner
archive(s), but they are unknown, the function will try all until it finds
the targetFile. See table in preProcess.
Optional character string indicating the URL to download from.
If not specified, then no download will be attempted. If not entry
exists in the CHECKSUMS.txt (in destinationPath), an entry
will be created or appended to. This CHECKSUMS.txt entry will be used
in subsequent calls to
prepInputs or preProcess, comparing the file on hand with the ad hoc
CHECKSUMS.txt. See table in preProcess.