tools::R_user_dir() provides configurable directories for R packages to write persistent information consistent with standard best practices relative to each supported operating systems for applications to store data, config, and cache information respectively. These standard best practices include writing to directories in the users home filespace, which is also specifically against CRAN policy.
These defaults can be overridden by setting the environmental variables R_USER_DATA_DIR , R_USER_CONFIG_DIR, R_USER_CACHE_DIR, respectively. If R developers should be using the locations provided by tools::R_user_dir() in packages, why does CRAN's check procedure not set these three environmental variables to CRAN compliant location by default (e.g. tempdir())? In order to comply with CRAN policy, a package developer can obviously set these environmental variables themselves within the call for every example, every unit test, and every vignette. Is this the recommended approach or is there a better technique? Thanks for any clarification! Regards, Carl --- Carl Boettiger http://carlboettiger.info/ ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
