nixos-checkout: Remove

This command was useful when NixOS was spread across multiple
repositories, but now it's pretty pointless (and obfuscates what
happens, i.e. "git clone git://github.com/NixOS/nixpkgs.git").

nixos/doc/manual/development/sources.xml

@@ -11,35 +11,25 @@ uses the NixOS and Nixpkgs sources provided by the
 <literal>nixos-unstable</literal> channel (kept in
 <filename>/nix/var/nix/profiles/per-user/root/channels/nixos</filename>).
 To modify NixOS, however, you should check out the latest sources from
-Git.  This is done using the following command:
+Git.  This is as follows:
 
 <screen>
-$ nixos-checkout <replaceable>/my/sources</replaceable>
-</screen>
-
-or
-
-<screen>
-$ mkdir -p <replaceable>/my/sources</replaceable>
-$ cd <replaceable>/my/sources</replaceable>
-$ nix-env -i git
 $ git clone git://github.com/NixOS/nixpkgs.git
 $ cd nixpkgs
 $ git remote add channels git://github.com/NixOS/nixpkgs-channels.git
 $ git remote update channels
 </screen>
 
-This will check out the latest NixOS sources to
+This will check out the latest Nixpkgs sources to
-<filename><replaceable>/my/sources</replaceable>/nixpkgs/nixos</filename>
+<filename>./nixpkgs</filename> the NixOS sources to
-and the Nixpkgs sources to
+<filename>./nixpkgs/nixos</filename>. (The NixOS source tree lives in
-<filename><replaceable>/my/sources</replaceable>/nixpkgs</filename>.
+a subdirectory of the Nixpkgs repository.) The remote
-(The NixOS source tree lives in a subdirectory of the Nixpkgs
+<literal>channels</literal> refers to a read-only repository that
-repository.) The remote <literal>channels</literal> refers to a
+tracks the Nixpkgs/NixOS channels (see <xref linkend="sec-upgrading"/>
-read-only repository that tracks the Nixpkgs/NixOS channels (see <xref
+for more information about channels). Thus, the Git branch
-linkend="sec-upgrading"/> for more information about channels). Thus,
+<literal>channels/nixos-14.12</literal> will contain the latest built
-the Git branch <literal>channels/nixos-14.12</literal> will contain
+and tested version available in the <literal>nixos-14.12</literal>
-the latest built and tested version available in the
+channel.</para>
-<literal>nixos-14.12</literal> channel.</para>
 
 <para>It’s often inconvenient to develop directly on the master
 branch, since if somebody has just committed (say) a change to GCC,

nixos/modules/installer/cd-dvd/system-tarball-fuloong2f.nix

@@ -52,8 +52,7 @@ in
   # Include some utilities that are useful for installing or repairing
   # the system.
   environment.systemPackages =
-    [ pkgs.subversion # for nixos-checkout
+    [ pkgs.w3m # needed for the manual anyway
-      pkgs.w3m # needed for the manual anyway
       pkgs.testdisk # useful for repairing boot problems
       pkgs.mssys # for writing Microsoft boot sectors / MBRs
       pkgs.parted

nixos/modules/installer/cd-dvd/system-tarball-sheevaplug.nix

@@ -49,8 +49,7 @@ in
   # Include some utilities that are useful for installing or repairing
   # the system.
   environment.systemPackages =
-    [ pkgs.subversion # for nixos-checkout
+    [ pkgs.w3m # needed for the manual anyway
-      pkgs.w3m # needed for the manual anyway
       pkgs.ddrescue
       pkgs.ccrypt
       pkgs.cryptsetup # needed for dm-crypt volumes

nixos/modules/installer/tools/nixos-checkout.nix

@@ -1,60 +0,0 @@
-# This module generates the nixos-checkout script, which performs a
-# checkout of the Nixpkgs Git repository.
-
-{ config, lib, pkgs, ... }:
-
-with lib;
-
-let
-
-  nixosCheckout = pkgs.substituteAll {
-    name = "nixos-checkout";
-    dir = "bin";
-    isExecutable = true;
-    src = pkgs.writeScript "nixos-checkout"
-      ''
-        #! ${pkgs.stdenv.shell} -e
-
-        if [ "$1" == "-h" ] || [ "$1" == "--help" ]; then
-          echo "Usage: `basename $0` [PREFIX]. See NixOS Manual for more info."
-          exit 0
-        fi
-
-        prefix="$1"
-        if [ -z "$prefix" ]; then prefix=/etc/nixos; fi
-        mkdir -p "$prefix"
-        cd "$prefix"
-
-        if [ -z "$(type -P git)" ]; then
-            echo "installing Git..."
-            nix-env -iA nixos.git
-        fi
-
-        # Move any old nixpkgs directories out of the way.
-        backupTimestamp=$(date "+%Y%m%d%H%M%S")
-
-        if [ -e nixpkgs -a ! -e nixpkgs/.git ]; then
-            mv nixpkgs nixpkgs-$backupTimestamp
-        fi
-
-        # Check out the Nixpkgs sources.
-        if ! [ -e nixpkgs/.git ]; then
-            echo "Creating repository in $prefix/nixpkgs..."
-            git init --quiet nixpkgs
-        else
-            echo "Updating repository in $prefix/nixpkgs..."
-        fi
-        cd nixpkgs
-        git remote add origin git://github.com/NixOS/nixpkgs.git || true
-        git remote add channels git://github.com/NixOS/nixpkgs-channels.git || true
-        git remote set-url origin --push git@github.com:NixOS/nixpkgs.git
-        git remote update
-        git checkout master
-      '';
-   };
-
-in
-
-{
-  environment.systemPackages = [ nixosCheckout ];
-}

nixos/modules/module-list.nix

@@ -47,7 +47,6 @@
   ./i18n/input-method/nabi.nix
   ./i18n/input-method/uim.nix
   ./installer/tools/auto-upgrade.nix
-  ./installer/tools/nixos-checkout.nix
   ./installer/tools/tools.nix
   ./misc/assertions.nix
   ./misc/crashdump.nix