I'd like to be able to change some default settings only in the case when checking a package with 'R CMD check'. More precisely, I'd like to execute a piece of R code before the Rd examples and/or test scripts are evaluated by 'R CMD check'. Is there a mechanism in 'R CMD check' that makes this possible? If not, is there a way to detect that you are running via 'R CMD check', e.g. an R or an environment variable being set?
The background for this is that some of my packages' examples are using memoization to cache computational expensive results (via the 'R.cache' package). These are cached to files which are by default stored under ~/.Rcache/. It turns out that these files live beyond the check cycle of the CRAN check servers, meaning that the next time the package is checked memoized results will be picked up. If I could detect that we're running via 'R CMD check', then I could change the default cache directory to a temporary directory (e.g. tempdir()) that will be clean out automatically. This is not a critical problem, because for now I could explicitly turn off the memoization in the code of my examples/regression tests, but the above would be a more generic solution. Thanks Henrik ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
