* Push packages from the final stdenv bootstrapping phase to

all-packages.  That is, an attribute like "bash" in all-packages.nix
  should evaluate to the "bash" used to build stdenv, it shouldn't
  build a new one.

  Hm, this would be a lot cleaner if we had lazy_rec ;-)

svn path=/nixpkgs/branches/usability/; revision=4775

pkgs/stdenv/generic/default.nix

@@ -1,5 +1,6 @@
 { stdenv, name, preHook ? null, postHook ? null, initialPath, gcc, shell
 , param1 ? "", param2 ? "", param3 ? "", param4 ? "", param5 ? ""
+, extraAttrs ? {}
 }:
 
 let {
@@ -24,6 +25,7 @@ let {
     # Add a utility function to produce derivations that use this
     # stdenv and its shell.
     // {
+    
       mkDerivation = attrs: derivation (attrs // {
         builder = if attrs ? realBuilder then attrs.realBuilder else shell;
         args = if attrs ? args then attrs.args else
@@ -31,6 +33,13 @@ let {
         stdenv = body;
         system = body.system;
       });
-    };
+
+    }
+
+    # Propagate any extra attributes.  For instance, we use this to
+    # "lift" packages like curl from the final stdenv for Linux to
+    # all-packages.nix for that platform (meaning that it has a line
+    # like curl = if stdenv ? curl then stdenv.curl else ...).
+    // extraAttrs;
 
 }

pkgs/stdenv/linux/default.nix

@@ -114,22 +114,26 @@ rec {
 
   # This function builds the various standard environments used during
   # the bootstrap.
-  stdenvBootFun = {glibc, gcc, binutils, staticGlibc}: (import ../generic) {
+  stdenvBootFun =
-    name = "stdenv-linux-boot";
+    {glibc, gcc, binutils, staticGlibc, extraAttrs ? {}}:
-    param1 = if staticGlibc then "static" else "dynamic";
+    
-    preHook = ./prehook.sh;
+    import ../generic {
-    stdenv = stdenvInitial;
+      name = "stdenv-linux-boot";
-    shell = ./tools/bash;
+      param1 = if staticGlibc then "static" else "dynamic";
-    gcc = (import ../../build-support/gcc-wrapper) {
+      preHook = ./prehook.sh;
       stdenv = stdenvInitial;
-      nativeTools = false;
+      shell = ./tools/bash;
-      nativeGlibc = false;
+      gcc = (import ../../build-support/gcc-wrapper) {
-      inherit gcc glibc binutils;
+        stdenv = stdenvInitial;
+        nativeTools = false;
+        nativeGlibc = false;
+        inherit gcc glibc binutils;
+      };
+      initialPath = [
+        staticTools
+      ];
+      inherit extraAttrs;
     };
-    initialPath = [
-      staticTools
-    ];
-  };
 
 
   # Create the first "real" standard environment.  This one consists
@@ -139,13 +143,13 @@ rec {
     # Use the statically linked, downloaded glibc/gcc/binutils.
     inherit glibc gcc binutils;
     staticGlibc = true;
+    extraAttrs = {inherit curl;};
   };
 
   # 2) These are the packages that we can build with the first
   #    stdenv.  We only need Glibc (in step 3).
   stdenvLinuxBoot1Pkgs = allPackages {
     bootStdenv = stdenvLinuxBoot1;
-#    bootCurl = curl;
   };
 
   # 3) Build Glibc with the statically linked tools.  The result is the
@@ -159,12 +163,12 @@ rec {
     glibc = stdenvLinuxGlibc;
     staticGlibc = false;
     inherit gcc binutils;
+    extraAttrs = {inherit curl;};
   };
 
   # 5) The packages that can be built using the second stdenv.
   stdenvLinuxBoot2Pkgs = allPackages {
     bootStdenv = stdenvLinuxBoot2;
-#    bootCurl = curl;
   };
 
   # 6) Construct a third stdenv identical to the second, except that
@@ -174,12 +178,12 @@ rec {
     glibc = stdenvLinuxGlibc;
     staticGlibc = false;
     inherit (stdenvLinuxBoot2Pkgs) gcc binutils;
+    extraAttrs = {inherit curl;};
   };
 
   # 7) The packages that can be built using the third stdenv.
   stdenvLinuxBoot3Pkgs = allPackages {
     bootStdenv = stdenvLinuxBoot3;
-#    bootCurl = curl;
   };
 
   # 8) Construct the final stdenv.  It uses the Glibc, GCC and
@@ -205,20 +209,14 @@ rec {
     };
 
     shell = stdenvLinuxBoot3Pkgs.bash ~ /bin/sh;
+    
+    extraAttrs = {
+      curl = stdenvLinuxBoot3Pkgs.realCurl;
+      inherit (stdenvLinuxBoot2Pkgs) binutils /* gcc */;
+      inherit (stdenvLinuxBoot3Pkgs)
+        gzip bzip2 bash coreutils diffutils findutils gawk
+        gnumake gnused gnutar gnugrep patch patchelf;
+    };
   };
 
-  # 8) Finally, the set of components built using the Linux stdenv.
-  #    Reuse the tools built in the previous steps.
-  stdenvLinuxPkgs =
-    allPackages {
-      bootStdenv = stdenvLinux;
-#      bootCurl = stdenvLinuxBoot3Pkgs.curl;
-    } //
-    {inherit (stdenvLinuxBoot2Pkgs) binutils gcc;} //
-    {inherit (stdenvLinuxBoot3Pkgs)
-      gzip bzip2 bash coreutils diffutils findutils gawk
-      gnumake gnused gnutar gnugrep curl patch patchelf;
-    } //
-    {glibc = stdenvLinuxGlibc;};
-    
 }

pkgs/top-level/all-packages.nix

@@ -37,6 +37,10 @@ rec {
   x11 = if useOldXLibs then xlibsOld.xlibs else xlibsWrapper;
 
 
+  ### Helper functions.
+  useFromStdenv = hasIt: it: alternative: if hasIt then it else alternative;
+
+
   ### STANDARD ENVIRONMENT
 
   stdenv = if bootStdenv == null then defaultStdenv else bootStdenv;
@@ -47,14 +51,11 @@ rec {
       allPackages = import ./all-packages.nix;
     }).stdenv;
 
-  bootCurl = null;
-  
 
   ### BUILD SUPPORT
 
   fetchurl = (import ../build-support/fetchurl) {
-    inherit stdenv;
+    inherit stdenv curl;
-    curl = bootCurl;
   };
 
   fetchsvn = (import ../build-support/fetchsvn) {
@@ -76,17 +77,19 @@ rec {
     inherit fetchurl stdenv flex;
   };
 
-  coreutils = (import ../tools/misc/coreutils) {
+  coreutils = useFromStdenv (stdenv ? coreutils) stdenv.coreutils
+  (import ../tools/misc/coreutils {
     inherit fetchurl stdenv;
-  };
+  });
 
   coreutilsDiet = (import ../tools/misc/coreutils-diet) {
     inherit fetchurl stdenv dietgcc perl;
   };
 
-  findutils = (import ../tools/misc/findutils) {
+  findutils = useFromStdenv (stdenv ? findutils) stdenv.findutils
+  (import ../tools/misc/findutils {
     inherit fetchurl stdenv coreutils;
-  };
+  });
 
   findutilsWrapper = (import ../tools/misc/findutils-wrapper) {
     inherit stdenv findutils;
@@ -121,27 +124,29 @@ rec {
     inherit fetchurl stdenv unzip jdk;
   };
 
-  diffutils = (import ../tools/text/diffutils) {
+  diffutils = useFromStdenv (stdenv ? diffutils) stdenv.diffutils
+  (import ../tools/text/diffutils {
     inherit fetchurl stdenv coreutils;
-  };
+  });
 
   gnupatch = (import ../tools/text/gnupatch) {
     inherit fetchurl stdenv;
   };
 
-  patch = if stdenv.system == "powerpc-darwin" then null else gnupatch;
+  patch = useFromStdenv (stdenv ? patch) stdenv.patch
+    (if stdenv.system == "powerpc-darwin" then null else gnupatch);
 
-  gnused = (import ../tools/text/gnused) {
+  gnused = useFromStdenv (stdenv ? gnused) stdenv.gnused (import ../tools/text/gnused {
     inherit fetchurl stdenv;
-  };
+  });
 
-  gnugrep = (import ../tools/text/gnugrep) {
+  gnugrep = useFromStdenv (stdenv ? gnugrep) stdenv.gnugrep (import ../tools/text/gnugrep {
     inherit fetchurl stdenv pcre;
-  };
+  });
 
-  gawk = (import ../tools/text/gawk) {
+  gawk = useFromStdenv (stdenv ? gawk) stdenv.gawk (import ../tools/text/gawk {
     inherit fetchurl stdenv;
-  };
+  });
 
   groff = (import ../tools/text/groff) {
     inherit fetchurl stdenv;
@@ -181,9 +186,9 @@ rec {
     inherit fetchurl stdenv;
   };
 
-  gnutar = (import ../tools/archivers/gnutar) {
+  gnutar = useFromStdenv (stdenv ? gnutar) stdenv.gnutar (import ../tools/archivers/gnutar {
     inherit fetchurl stdenv;
-  };
+  });
 
   gnutarDiet = (import ../tools/archivers/gnutar-diet) {
     inherit fetchurl stdenv dietgcc;
@@ -197,13 +202,13 @@ rec {
     inherit fetchurl stdenv;
   };
 
-  gzip = (import ../tools/compression/gzip) {
+  gzip = useFromStdenv (stdenv ? gzip) stdenv.gzip (import ../tools/compression/gzip {
     inherit fetchurl stdenv;
-  };
+  });
 
-  bzip2 = (import ../tools/compression/bzip2) {
+  bzip2 = useFromStdenv (stdenv ? bzip2) stdenv.bzip2 (import ../tools/compression/bzip2 {
     inherit fetchurl stdenv;
-  };
+  });
 
   zdelta = (import ../tools/compression/zdelta) {
     inherit fetchurl stdenv;
@@ -221,7 +226,9 @@ rec {
     inherit fetchurl stdenv;
   };
 
-  curl = (import ../tools/networking/curl) {
+  curl = useFromStdenv (stdenv ? curl) stdenv.curl realCurl;
+
+  realCurl = (import ../tools/networking/curl) {
     inherit fetchurl stdenv zlib;
   };
 
@@ -331,9 +338,9 @@ rec {
    
   ### SHELLS
 
-  bash = (import ../shells/bash) {
+  bash = useFromStdenv (stdenv ? bash) stdenv.bash (import ../shells/bash {
     inherit fetchurl stdenv;
-  };
+  });
 
   tcsh = (import ../shells/tcsh) {
     inherit fetchurl stdenv ncurses;
@@ -346,9 +353,10 @@ rec {
 
   ### DEVELOPMENT
 
-  binutils = (import ../development/tools/misc/binutils) {
+  binutils = useFromStdenv (stdenv ? binutils) stdenv.binutils
+  (import ../development/tools/misc/binutils {
     inherit fetchurl stdenv noSysDirs;
-  };
+  });
 
   binutilsMips = (import ../development/tools/misc/binutils-cross) {
     inherit fetchurl stdenv noSysDirs;
@@ -365,7 +373,8 @@ rec {
     cross = "sparc-linux";
   };
 
-  patchelf = (import ../development/tools/misc/patchelf) {
+  patchelf = useFromStdenv (stdenv ? patchelf) stdenv.patchelf
+  (import ../development/tools/misc/patchelf) {
     inherit fetchurl stdenv;
   };
 
@@ -458,9 +467,10 @@ rec {
     inherit fetchurl stdenv readline ncurses g77 perl flex;
   };
 
-  gnumake = (import ../development/tools/build-managers/gnumake) {
+  gnumake = useFromStdenv (stdenv ? gnumake) stdenv.gnumake
+  (import ../development/tools/build-managers/gnumake {
     inherit fetchurl stdenv;
-  };
+  });
 
   mk = (import ../development/tools/build-managers/mk) {
     inherit fetchurl stdenv;
@@ -2233,14 +2243,12 @@ rec {
   };
 
   #nixStatic = (import ../misc/nix-static) {
-  # inherit fetchurl stdenv aterm perl;
+  # inherit fetchurl stdenv aterm perl curl;
-  #  curl = bootCurl; /* !!! ugly */
   #  bdb = db4;
   #};
 
   nix = (import ../misc/nix) {
-    inherit fetchurl stdenv aterm perl;
+    inherit fetchurl stdenv aterm perl curl;
-    curl = bootCurl; /* !!! ugly */
     bdb = db4;
   };
 
@@ -2272,4 +2280,5 @@ rec {
   joe = (import ../applications/editors/joe) {
     inherit stdenv fetchurl;
   };
+
 }