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Where downloaded Copernicus files are kept

Source: R/copernicus_cli.R
copernicus_cache.Rd

Copernicus subsets are slow to fetch and rarely change, so accessEnvDat() writes each one to disk and reads it back on later calls. This resolves where that cache lives.

Usage

copernicus_cache(...)

Arguments

...

path components appended to the cache root, as file.path()

Value

the resolved path, with its parent directory created if needed

Details

The location is taken from the first of these that is set:

  1. getOption("datamatch.cache")

  2. the DATAMATCH_CACHE environment variable

  3. tools::R_user_dir(), the per-package location R reserves for exactly this purpose

The third is a working default, so nothing has to be configured before the first download. Set one of the first two to put the cache on a larger disk, or to share one cache between projects:

options(datamatch.cache = "~/data/copernicus")   # in .Rprofile

Moving an existing cache

Earlier versions of this package took the cache root from a ~/.copernicusdata file, by way of the copernicus package. That file is no longer read. To keep using files downloaded under the old scheme, point the option at the same directory rather than moving anything:

options(datamatch.cache = readLines("~/.copernicusdata"))