* Move the substitution functions into stdenv (not merged yet).

* If the environment variable buildCommand is set, then eval that
  instead of doing the build phases.  This is used by the runCommand
  function in all-packages.nix to allow one-lines like

    foo = runCommand "foo" {} "mkdir $out; echo foo > $out/foo";
    

svn path=/nixpkgs/trunk/; revision=7298

pkgs/build-support/substitute/substitute-all.sh

@@ -0,0 +1,15 @@
+source $stdenv/setup
+
+args=
+
+target=$out
+if test -n "$dir"; then
+    target=$out/$dir/$name
+    ensureDir $out/$dir
+fi
+
+substituteAll $src $target
+
+if test -n "$isExecutable"; then
+    chmod +x $target
+fi