tools/winlibs.R

In ijtiff: Comprehensive TIFF I/O with Full Support for 'ImageJ' TIFF Files

if (!file.exists("../windows/libtiff/include/tiff.h")) {
  unlink("../windows", recursive = TRUE)
  url <- if(grepl("aarch", R.version$platform)){
    "https://github.com/r-windows/bundles/releases/download/libtiff-4.6.0/libtiff-4.6.0-clang-aarch64.tar.xz"
  } else if(grepl("clang", Sys.getenv('R_COMPILED_BY'))){
    "https://github.com/r-windows/bundles/releases/download/libtiff-4.6.0/libtiff-4.6.0-clang-x86_64.tar.xz"
  }  else if(getRversion() >= "4.2") {
    "https://github.com/r-windows/bundles/releases/download/libtiff-4.6.0/libtiff-4.6.0-ucrt-x86_64.tar.xz"
  } else {
    "https://github.com/rwinlib/libtiff/archive/v4.2.0.tar.gz"
  }
  download.file(url, basename(url), quiet = TRUE)
  dir.create("../windows", showWarnings = FALSE)
  untar(basename(url), exdir = "../windows", tar = 'internal')
  unlink(basename(url))
  setwd("../windows")
  file.rename(list.files(), 'libtiff')
}