R/cache-helpers.R
prepareFileBackedRaster.Rd
Rasters are sometimes file-based, so the normal save and copy and assign
mechanisms in R don't work for saving, copying and assigning.
This function creates an explicit file copy of the file that is backing the raster,
and changes the pointer (i.e., filename(object)
) so that it is pointing
to the new file.
The raster object to save to the repository.
Character denoting an existing directory in which an artifact will be saved.
Logical. Should the raster be saved to disk, overwriting existing file.
if using a database backend, drv must be an object that inherits from DBIDriver e.g., from package RSQLite, e.g., SQLite
an optional DBIConnection object, as returned by dbConnect().
Not used
A raster object and its newly located file backing.
Note that if this is a legitimate Cache repository, the new location
will be a subdirectory called rasters/
of repoDir/
.
If this is not a repository, the new location will be within repoDir
.