* Allow the user to install stdenv (nix-env -i stdenv) and get all the

packages in the stdenv as propagated user environment packages.

svn path=/nixpkgs/branches/stdenv-updates/; revision=15300

pkgs/lib/attrsets.nix

@@ -123,5 +123,9 @@ rec {
               else f (path ++ [name]) value;
         in mapAttrs g set;
     in recurse [] set;
-  
+
+
+  /* Check whether the argument is a derivation. */
+  isDerivation = x: isAttrs x && x ? type && x.type == "derivation";
+
 }

pkgs/stdenv/generic/builder.sh

@@ -30,3 +30,8 @@ sed \
     -e "s^@param4@^$p4^g" \
     -e "s^@param5@^$p5^g" \
     < "$setup" > "$out/setup"
+
+# Allow the user to install stdenv using nix-env and get the packages
+# in stdenv.
+mkdir $out/nix-support
+echo $propagatedUserEnvPkgs > $out/nix-support/propagated-user-env-packages

pkgs/stdenv/generic/default.nix

@@ -7,7 +7,9 @@
   fetchurlBoot
 }:
 
-let {
+let
+
+  lib = import ../../lib;
 
   stdenvGenerator = setupScript: rec {
 
@@ -27,6 +29,9 @@ let {
 
         # TODO: make this more elegant.
         inherit param1 param2 param3 param4 param5;
+
+        propagatedUserEnvPkgs = [gcc] ++
+          lib.filter lib.isDerivation initialPath;
       }
 
       // {
@@ -79,7 +84,7 @@ let {
 
         # For convenience, bring in the library functions in lib/ so
         # packages don't have to do that themselves.
-        lib = import ../../lib;
+        inherit lib;
 
         inherit fetchurlBoot;
 
@@ -94,6 +99,4 @@ let {
   }.result;
 
   
-  body = stdenvGenerator ./setup.sh;
-
-}
+in stdenvGenerator ./setup.sh

pkgs/stdenv/linux/default.nix

@@ -205,10 +205,9 @@ rec {
     
     preHook = builtins.toFile "prehook.sh" commonPreHook;
     
-    initialPath = [
+    initialPath = 
       ((import ../common-path.nix) {pkgs = stdenvLinuxBoot3Pkgs;})
-      stdenvLinuxBoot3Pkgs.patchelf
-    ];
+      ++ [stdenvLinuxBoot3Pkgs.patchelf];
 
     gcc = wrapGCC rec {
       inherit (stdenvLinuxBoot2Pkgs) binutils;