rPackages: Implement overlay infrastructure

pkgs/all-packages.nix

@@ -36,6 +36,8 @@ self: super: pkgs: with pkgs; {
 
   pythonOverrides = lib.composeExtensions super.pythonOverrides (import ./python-packages.nix pkgs);
 
+  rOverrides = lib.composeExtensions super.rOverrides (import ./r-modules.nix pkgs);
+
   #sumo = callPackage ./sumo.nix { fox = fox_1_6; };
 
   namd = callPackage ./namd.nix { };

pkgs/r-modules.nix

@@ -0,0 +1,3 @@
+pkgs: self: super: with self; {
+
+}

release.nix

@@ -110,9 +110,11 @@ in let
       # Provided overlays
       pkgsNamesTopLevel = let self = import ./pkgs/all-packages.nix    self { } self; in self;
       pkgsNamesPython   = let self = import ./pkgs/python-packages.nix { } self { } ; in self;
+      pkgsNamesR        = let self = import ./pkgs/r-modules.nix       { } self { } ; in self;
 
       temporaryNamesTopLevel = let self = import ./temporary/all-packages.nix    self { } self; in self;
       temporaryNamesPython   = let self = import ./temporary/python-packages.nix { } self { } ; in self;
+      temporaryNamesR        = let self = import ./temporary/r-modules.nix       { } self { } ; in self;
 
     in {
       # Tweak the nixos make-channel code to include the upstream channel.
@@ -150,6 +152,7 @@ in let
       pkgs = extractDerivations pkgs pkgsNamesTopLevel // {
         python2Packages = extractDerivations pkgs.python2Packages pkgsNamesPython;
         python3Packages = extractDerivations pkgs.python3Packages pkgsNamesPython;
+        rPackages       = extractDerivations pkgs.rPackages       pkgsNamesR;
       };
 
 
@@ -158,6 +161,7 @@ in let
       temporary = extractDerivations pkgs temporaryNamesTopLevel // {
         python2Packages = extractDerivations pkgs.python2Packages temporaryNamesPython;
         python3Packages = extractDerivations pkgs.python3Packages temporaryNamesPython;
+        rPackages       = extractDerivations pkgs.rPackages       temporaryNamesR;
       };
     };
 

temporary/all-packages.nix

@@ -18,4 +18,16 @@ self: super: pkgs: with pkgs; {
   python36 = super.python36.override { packageOverrides = pythonOverrides; };
 
   pythonOverrides = import ./python-packages.nix pkgs;
+
+  # same for R as Python (except we have to do the self/super plumbing)
+  rPackages = super.rPackages.override {
+    overrides =
+      let
+        overrides = rOverrides self super.rPackages;
+        self = super.rPackages // overrides;
+      in
+        overrides;
+  };
+
+  rOverrides = import ./r-modules.nix pkgs;
 }

temporary/r-modules.nix

@@ -0,0 +1,3 @@
+pkgs: self: super: with self; {
+
+}