Update cache management

[dieghernan]

Closes #223

See here an implementation of the new cache management. There is a suite of functions that detects the current cache dir (either set up via parameter, via options(eurostat_cache_dir or installed in the machine) and manages the download.

A similar suite is implemented in two of my packages, already on CRAN: https://github.com/rOpenGov/giscoR and https://github.com/rOpenSpain/mapSpain

The current approach only writes on the temporary directory unless the user set a cache dir. Also, for storing the persistent cache dir with rappdirs the user needs to explicitly install the cache dir path with install = TRUE.

I updated also some links, the cache parts on the functions that uses it and the clean_eurostat_cache function.

There is also a whole test suite for that. Note that the test suite also switches temporarly the cache dir to run the tests on a temporary dir, so no files are downloaded or removed on the local machine.

By last, I updated the GH check action to cache dependencies also for Windows (would reduce significantly the running time) and for showing the tests output.

[antagomir]

Seems good! Shall we merge or are more commits still flowing in?

[pitkant]

Seems good. Some notes:

• Could you do a version bump on DESCRIPTION from 3.7.7 to 3.7.8?
• test_xxx_restore_cache relies on naming (test_xxx_) to be run as the last test, maybe numbers could be used instead in this case? Although then all tests would need to be numbered like test_1_ (see https://stackoverflow.com/questions/32931886/is-it-possible-to-determine-test-order-in-testthat)
• With testthat 3 it has become possible to run tests in parallel, maybe this setting should be then explicitly turned off in DESCRIPTION since test_xxx_restore_cache is dependent on being run last? (see https://testthat.r-lib.org/articles/parallel.html)

[dieghernan]

Hi! I’ll tackle your comments and I would let you know, thanks both

[dieghernan]

It’s done now, moving to testthat 3 made me change some tests due to deprecations (a bit of pain).

I’ll leave it to you if finally you decided to merge @antagomir @pitkant

[antagomir]

Ok to me, how about @pitkant

[pitkant]

Thank you for your hard work, looks great!