cran-packages: restructured

pkgs/development/r-modules/generic-builder.nix

@@ -1,9 +1,9 @@
-R:
+{ R, xvfb_run, utillinux }:
 
 { name, buildInputs ? [], ... } @ attrs:
 
 R.stdenv.mkDerivation ({
-  buildInputs = buildInputs ++ [R];
+  buildInputs = buildInputs ++ [R xvfb_run utillinux];
 
   configurePhase = ''
     runHook preConfigure
@@ -16,10 +16,22 @@ R.stdenv.mkDerivation ({
     runHook postBuild
   '';
 
+  installOptions = if attrs.skipTest or false then
+    "--no-test-load "
+  else
+    "";
+
+  rCommand = if attrs.requireX or false then
+    # Unfortunately, xvfb-run has a race condition even with -a option, so that
+    # we acquire a lock explicitly.
+    "flock ${xvfb_run} xvfb-run -a -e xvfb-error R"
+  else
+    "R";
+
   installPhase = ''
     runHook preInstall
     mkdir -p $out/library
-    R CMD INSTALL -l $out/library .
+    $rCommand CMD INSTALL $installOptions --configure-args="$configureFlags" -l $out/library .
     runHook postInstall
   '';