rgdal installation on OS X

rgdal-install-with_homebrew.R

install_from_source <- function (pkg, args = NULL, repos = "http://cran.rstudio.com", overwrite = FALSE, ...) {
  
  if (!overwrite) {
    if (pkg %in% installed.packages()) {
      message(pkg, " is already installed")
      return()
     }
   }
  
  install.packages(
    pkg, 
    configure.args = args, 
    repos = repos,
    type = "source",
    keep_outputs = TRUE,
    verbose = TRUE)
}

usr_local_path <- function (...) file.path("/usr/local", ...)
homebrew_path <- function (...) usr_local_path("opt", ...)
stopifnot(dir.exists(homebrew_path()))

HOST_GUESS <- system("/usr/local/share/automake-1.15/config.guess", intern = TRUE)
message("HOST_GUESS is: ", HOST_GUESS)

########################################################################################

GDAL_CONFIG <- homebrew_path("gdal2", "bin", "gdal-config")
stopifnot(file.exists(GDAL_CONFIG))

PROJ_CONFIG_ARGS <- c(
  paste0("--with-proj-include=", homebrew_path("proj", "include")),
  paste0("--with-proj-share=", homebrew_path("proj", "share", "proj")),
  paste0("--with-proj-lib=", homebrew_path("proj", "lib")))

RGDAL_CONFIG_ARGS <- c(
  PROJ_CONFIG_ARGS,
  #paste0("--host=", HOST_GUESS),
  paste0("--with-gdal-config=", GDAL_CONFIG))

install_from_source("rgdal", args = RGDAL_CONFIG_ARGS, overwrite = TRUE)

########################################################################################

RGEOS_CONFIG_ARGS <- c(
  paste0("--with-geos-config=", usr_local_path("bin", "geos-config")),
  PROJ_CONFIG_ARGS)

install_from_source("rgeos", args = RGEOS_CONFIG_ARGS, overwrite = TRUE)

########################################################################################

SF_CONFIG_ARGS <- RGDAL_CONFIG_ARGS

install_from_source("sf", args = SF_CONFIG_ARGS, overwrite = TRUE)