coreutils: split a coreutils-full version

- default coreutils is stripped of /share/ (11 -> 2 MiB)
- coreutils-full retains /share/ and adds openssl for faster *sum tools
- NixOS systemPackages contains coreutils-full
- *Support parameter defaults are moved inside
  (it seemed confusing to have `? false` and "at once" with `? isLinux`)

Closure considerations:
+ typical build-time closure will get lighter by ~9 MiB
- typical closure of NixOS installation will grow by ~2 MiB,
  due to referring to both versions.  I think it would be possible to
  re-use most of the utils between the two versions, but the expression
  would get much more complex.

I considered having stdenv with minimal coreutils and the default
`coreutils` attribute being full, but it turned out there were too many
trivial references in nixpkgs, so it didn't seem easy to keep rebuild
impact of openssl from growing significantly.

nixos/modules/config/system-path.nix

@@ -13,7 +13,7 @@ let
       pkgs.attr
       pkgs.bashInteractive # bash with ncurses support
       pkgs.bzip2
-      pkgs.coreutils
+      pkgs.coreutils-full
       pkgs.cpio
       pkgs.curl
       pkgs.diffutils

pkgs/tools/misc/coreutils/default.nix

@@ -1,9 +1,12 @@
 { stdenv, lib, buildPackages
 , autoreconfHook, texinfo, fetchurl, perl, xz, libiconv, gmp ? null
 , hostPlatform, buildPlatform
-, aclSupport ? false, acl ? null
-, attrSupport ? false, attr ? null
+, aclSupport ? stdenv.isLinux, acl ? null
+, attrSupport ? stdenv.isLinux, attr ? null
 , selinuxSupport? false, libselinux ? null, libsepol ? null
+# No openssl in default version, so openssl-induced rebuilds aren't too big.
+# It makes *sum functions significantly faster.
+, minimal ? true, withOpenssl ? !minimal, openssl ? null
 , withPrefix ? false
 , singleBinary ? "symlinks" # you can also pass "shebangs" or false
 }:
@@ -40,6 +43,7 @@ stdenv.mkDerivation rec {
   configureFlags = [ "--with-packager=https://NixOS.org" ]
     ++ optional (singleBinary != false)
       ("--enable-single-binary" + optionalString (isString singleBinary) "=${singleBinary}")
+    ++ optional withOpenssl "--with-openssl"
     ++ optional hostPlatform.isSunOS "ac_cv_func_inotify_init=no"
     ++ optional withPrefix "--program-prefix=g"
     ++ optionals (hostPlatform != buildPlatform && hostPlatform.libc == "glibc") [
@@ -52,6 +56,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ gmp ]
     ++ optional aclSupport acl
     ++ optional attrSupport attr
+    ++ optional withOpenssl openssl
     ++ optionals hostPlatform.isCygwin [ autoreconfHook texinfo ]   # due to patch
     ++ optionals selinuxSupport [ libselinux libsepol ]
        # TODO(@Ericson2314): Investigate whether Darwin could benefit too
@@ -82,9 +87,13 @@ stdenv.mkDerivation rec {
     sed -i Makefile -e 's|^INSTALL =.*|INSTALL = ${buildPackages.coreutils}/bin/install -c|'
   '';
 
-  postInstall = optionalString (hostPlatform != buildPlatform) ''
+  postInstall = optionalString (hostPlatform != buildPlatform && !minimal) ''
     rm $out/share/man/man1/*
     cp ${buildPackages.coreutils}/share/man/man1/* $out/share/man/man1
+  ''
+  # du: 8.7 M locale + 0.4 M man pages
+  + optionalString minimal ''
+    rm -r "$out/share"
   '';
 
   meta = {

pkgs/top-level/all-packages.nix

@@ -1945,11 +1945,8 @@ with pkgs;
 
   cool-retro-term = libsForQt5.callPackage ../applications/misc/cool-retro-term { };
 
-  coreutils = callPackage ../tools/misc/coreutils {
-    aclSupport = stdenv.isLinux;
-    attrSupport = stdenv.isLinux;
-  };
-
+  coreutils = callPackage ../tools/misc/coreutils { };
+  coreutils-full = coreutils.override { minimal = false; };
   coreutils-prefixed = coreutils.override { withPrefix = true; singleBinary = false; };
 
   corkscrew = callPackage ../tools/networking/corkscrew { };