elevatr moved to Suggests. Fixes #157

IsoriX/DESCRIPTION

@@ -11,7 +11,6 @@ Authors@R: c(
 Depends:
     R (>= 3.5.0)
 Imports:
-    elevatr,
     graphics,
     grDevices,
     grid,
@@ -35,6 +34,7 @@ Description: Building isoscapes using mixed models and inferring the geographic
   plotting the maps produced with 'terra' using 'lattice'.
 License: GPL (>= 2)
 Suggests:
+    elevatr,
     colorspace,
     gmp,
     magick,

IsoriX/R/getelev.R

@@ -71,6 +71,11 @@ getelev <- function(file = "~/elevation_world_z5.tif",
                     ...
 ) {
 
+  ## Checking that elevatr is installed
+  if (!requireNamespace("elevatr", quietly = TRUE)) {
+    stop("You must install the package elevatr for this function to run: `install.packages('elevatr')`")
+  }
+
   ## Turning path into canonical form
   ## (this avoids the problem of using the wrong slashes and so on)
   file <- normalizePath(file, mustWork = FALSE)

IsoriX/inst/NEWS.Rd

@@ -35,6 +35,7 @@
   \subsection{Geeky change}{
     \itemize{
       \item \code{OceanMask} and \code{CountryBorders} are no longer stored as RDA files in \code{/data}, but as RDS files in \code{/extata} since objects created with \pkg{terra} cannot be saved as RDA files. These files are automatically loaded when the package is attached.
+      \item \pkg{elevatr} moved from Imports to Suggests (#157)
     }
   }
 }

README.md

@@ -33,7 +33,7 @@ You can download and install the stable version of IsoriX directly from within R
 install.packages("IsoriX", dependencies = TRUE)
 ```
 
-Note: if you get into troubles due to `gmp`, `magick`, `rgl`, `testthat`, or `webshot2` retry using simply:
+Note: if you get into troubles due to `elevatr`, `gmp`, `magick`, `rgl`, `testthat`, or `webshot2` retry using simply:
 
 ```R
 install.packages("IsoriX")