Move all of NixOS to nixos/ in preparation of the repository merge

nixos/modules/config/system-path.nix

@@ -0,0 +1,142 @@
+# This module defines the packages that appear in
+# /run/current-system/sw.
+
+{ config, pkgs, ... }:
+
+with pkgs.lib;
+
+let
+
+  cfg = config.environment;
+
+  extraManpages = pkgs.runCommand "extra-manpages" { buildInputs = [ pkgs.help2man ]; }
+    ''
+      mkdir -p $out/share/man/man1
+      help2man ${pkgs.gnutar}/bin/tar > $out/share/man/man1/tar.1
+    '';
+
+  requiredPackages =
+    [ config.environment.nix
+      pkgs.acl
+      pkgs.attr
+      pkgs.bashInteractive # bash with ncurses support
+      pkgs.bzip2
+      pkgs.coreutils
+      pkgs.cpio
+      pkgs.curl
+      pkgs.diffutils
+      pkgs.eject # HAL depends on it anyway
+      pkgs.findutils
+      pkgs.gawk
+      pkgs.glibc # for ldd, getent
+      pkgs.gnugrep
+      pkgs.gnupatch
+      pkgs.gnused
+      pkgs.gnutar
+      pkgs.gzip
+      pkgs.xz
+      pkgs.less
+      pkgs.libcap
+      pkgs.man
+      pkgs.nano
+      pkgs.ncurses
+      pkgs.netcat
+      pkgs.openssh
+      pkgs.pciutils
+      pkgs.perl
+      pkgs.procps
+      pkgs.rsync
+      pkgs.strace
+      pkgs.sysvtools
+      pkgs.time
+      pkgs.usbutils
+      pkgs.utillinux
+      extraManpages
+    ];
+
+in
+
+{
+  options = {
+
+    environment = {
+
+      systemPackages = mkOption {
+        default = [];
+        example = "[ pkgs.icecat3 pkgs.thunderbird ]";
+        description = ''
+          The set of packages that appear in
+          /run/current-system/sw.  These packages are
+          automatically available to all users, and are
+          automatically updated every time you rebuild the system
+          configuration.  (The latter is the main difference with
+          installing them in the default profile,
+          <filename>/nix/var/nix/profiles/default</filename>.
+        '';
+      };
+
+      pathsToLink = mkOption {
+        # Note: We need `/lib' to be among `pathsToLink' for NSS modules
+        # to work.
+        default = [];
+        example = ["/"];
+        description = "List of directories to be symlinked in `/run/current-system/sw'.";
+      };
+    };
+
+    system = {
+
+      path = mkOption {
+        default = cfg.systemPackages;
+        description = ''
+          The packages you want in the boot environment.
+        '';
+
+        apply = list: pkgs.buildEnv {
+          name = "system-path";
+          paths = list;
+          inherit (cfg) pathsToLink;
+          ignoreCollisions = true;
+          # !!! Hacky, should modularise.
+          postBuild =
+            ''
+              if [ -x $out/bin/update-mime-database -a -w $out/share/mime/packages ]; then
+                  $out/bin/update-mime-database -V $out/share/mime
+              fi
+
+              if [ -x $out/bin/gtk-update-icon-cache -a -f $out/share/icons/hicolor/index.theme ]; then
+                  $out/bin/gtk-update-icon-cache $out/share/icons/hicolor
+              fi
+
+              if [ -x $out/bin/glib-compile-schemas -a -w $out/share/glib-2.0/schemas ]; then
+                  $out/bin/glib-compile-schemas $out/share/glib-2.0/schemas
+              fi
+            '';
+        };
+
+      };
+
+    };
+
+  };
+
+  config = {
+
+    environment.systemPackages = requiredPackages;
+
+    environment.pathsToLink =
+      [ "/bin"
+        "/etc/xdg"
+        "/info"
+        "/lib"
+        "/man"
+        "/sbin"
+        "/share/emacs"
+        "/share/org"
+        "/share/info"
+        "/share/terminfo"
+        "/share/man"
+      ];
+
+  };
+}