nixpkgs/pkgs/development/r-modules/wrapper.nix

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{ stdenv, R, makeWrapper, recommendedPackages, packages }:
stdenv.mkDerivation rec {
name = R.name + "-wrapper";
buildInputs = [makeWrapper R] ++ recommendedPackages ++ packages;
unpackPhase = ":";
# This filename is used in 'installPhase', but needs to be
# referenced elsewhere. This will be relative to this package's
# path.
passthru = {
fixLibsR = "fix_libs.R";
};
installPhase = ''
mkdir -p $out/bin
cd ${R}/bin
for exe in *; do
makeWrapper ${R}/bin/$exe $out/bin/$exe \
--prefix "R_LIBS_SITE" ":" "$R_LIBS_SITE"
done
# RStudio (and perhaps other packages) overrides the R_LIBS_SITE
# which the wrapper above applies, and as a result packages
# installed in the wrapper (as in the method described in
# https://nixos.org/nixpkgs/manual/#r-packages) aren't visible.
# The below turns R_LIBS_SITE into some R startup code which can
# correct this.
echo "# Autogenerated by wrapper.nix from R_LIBS_SITE" > $out/${passthru.fixLibsR}
echo -n ".libPaths(c(.libPaths(), \"" >> $out/${passthru.fixLibsR}
echo -n $R_LIBS_SITE | sed -e 's/:/", "/g' >> $out/${passthru.fixLibsR}
echo -n "\"))" >> $out/${passthru.fixLibsR}
echo >> $out/${passthru.fixLibsR}
'';
meta = {
platforms = stdenv.lib.platforms.unix;
};
}