Hi, The MazamaSpatialUtils <http://cran.r-project.org/package=MazamaSpatialUtils> package has a required "package state" variable which users set to specify where they want to store large amounts of GIS data that is being downloaded and converted by the package. The implementation of this follows Hadley's advice here:
http://adv-r.had.co.nz/Environments.html#explicit-envs The functionality is implemented with package environment and getter and setter functions: spatialEnv <- new.env(parent = emptyenv()) spatialEnv$dataDir <- NULL getSpatialDataDir <- function() { if (is.null(spatialEnv$dataDir)) { stop('No data directory found. Please set a data directory with setSpatialDataDir("YOUR_DATA_DIR").',call.=FALSE) } else { return(spatialEnv$dataDir) } } setSpatialDataDir <- function(dataDir) { old <- spatialEnv$dataDir dataDir <- path.expand(dataDir) tryCatch({ if (!file.exists(dataDir)) dir.create(dataDir) spatialEnv$dataDir <- dataDir }, warning = function(warn) { warning("Invalid path name.") }, error = function(err) { stop(paste0("Error in setSpatialDataDir(",dataDir,").")) }) return(invisible(old)) } My question is: *What is an appropriate directory to specify for vignettes (or demos or examples) that need to go through CRAN testing?* The R code in vignettes need to specify a directory that is writable during the package build process but that will also be available to users. Should we create a /tmp/<hash> directory? Would that be available on all systems? Alternatively, *What is an alternative to vignettes and demos for tutorial scripts that should not be tested upon submission to CRAN?* Thanks for any suggestions. Jon -- Jonathan Callahan, PhD Mazama Science 206-708-5028 mazamascience.com [[alternative HTML version deleted]] ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
