Fixing what I broke in the last commit in setup.sh.

I made the stdenvCross adapter simpler, according to Nicolas Pierron comments,
and I commented it a bit.

There are still jobs to do. At least:
- Plan for the general renaming from buildInputs to hostInputs
  - We should not break merges from trunk.
- Make the generic stdenv understand about host/buildInputs, at least for
  native builds, because it is used in the always-native building of
  stdenvLinux. This should allow us to remove all duplications of "*NoCross" in
  nixpkgs.


svn path=/nixpkgs/branches/stdenv-updates/; revision=18449

pkgs/stdenv/adapters.nix

@@ -110,24 +110,19 @@ rec {
   # Return a modified stdenv that adds a cross compiler to the
   # builds.
   makeStdenvCross = stdenv: cross: binutilsCross: gccCross: stdenv //
-    { mkDerivation = {name, buildInputs ? null, hostInputs ? null,
-            propagatedBuildInputs ? null, propagatedHostInputs ? null, ...}@args: let
-            buildInputsList = if (buildInputs != null) then
-                buildInputs else [];
-            hostInputsList = if (hostInputs != null) then
-                hostInputs else [];
-            propagatedBuildInputsList = if (propagatedBuildInputs != null) then
-                propagatedBuildInputs else [];
-            propagatedHostInputsList = if (propagatedHostInputs != null) then
-                propagatedHostInputs else [];
-            buildInputsDrvs = map (drv: drv.buildDrv) buildInputsList;
-            hostInputsDrvs = map (drv: drv.hostDrv) hostInputsList;
-            propagatedBuildInputsDrvs = map (drv: drv.buildDrv) propagatedBuildInputsList;
-            propagatedHostInputsDrvs = map (drv: drv.buildDrv) propagatedHostInputsList;
+    { mkDerivation = {name, buildInputs ? [], hostInputs ? [],
+            propagatedBuildInputs ? [], propagatedHostInputs ? [], ...}@args: let
+            # propagatedBuildInputs exists temporarily as another name for
+            # propagatedHostInputs.
+            buildInputsDrvs = map (drv: drv.buildDrv) buildInputs;
+            hostInputsDrvs = map (drv: drv.hostDrv) hostInputs;
+            propagatedHostInputsDrvs = map (drv: drv.buildDrv) (propagatedBuildInputs
+                ++ propagatedHostInputs);
             buildDrv = stdenv.mkDerivation (args // {
+                # buildInputs in the base stdenv will be named hostInputs
                 buildInputs = buildInputsDrvs ++ hostInputsDrvs;
-                propagatedBuildInputs = propagatedBuildInputsDrvs ++
-                    propagatedHostInputsDrvs;
+                # Should be propagatedHostInputs one day:
+                propagatedBuildInputs = propagatedHostInputsDrvs;
             });
             hostDrv = if (cross == null) then buildDrv else
                 stdenv.mkDerivation (args // { 

pkgs/stdenv/generic/setup.sh

@@ -159,7 +159,7 @@ findInputs() {
             ;;
     esac
 
-    $var="${!var} $pkg "
+    eval $var="'${!var} $pkg '"
 
     if test -f $pkg/nix-support/setup-hook; then
         source $pkg/nix-support/setup-hook
@@ -177,13 +177,14 @@ for i in $buildInputs $propagatedBuildInputs; do
     findInputs $i pkgs
 done
 
-pkgsHost=""
-for i in $hostInputs $propagatedHostInputs; do
-    findInputs $i pkgsHost
+hostPkgs=""
+for i in $hostInputs $propagatedBuildInputs; do
+    findInputs $i hostPkgs
 done
 
 # Set the relevant environment variables to point to the build inputs
 # found above.
+envHostHooks=()
 addToEnv() {
     local pkg=$1
 
@@ -205,12 +206,12 @@ addToEnvHost() {
     local pkg=$1
 
     # Run the package-specific hooks set by the setup-hook scripts.
-    for i in "${envHooksHost[@]}"; do
+    for i in "${envHostHooks[@]}"; do
         $i $pkg
     done
 }
 
-for i in $pkgsHost; do
+for i in $hostPkgs; do
     addToEnvHost $i
 done