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nixpkgs/nixos/modules/installer/tools/nixos-checkout.nix
Eelco Dolstra e98da673e4 nixos-checkout: Add nixpkgs-channels as a remote
This way, you can do things like

  git checkout channels/nixos-14.12

to get the latest tested and built version of NixOS.
2015-05-20 14:16:36 +02:00

61 lines
1.6 KiB
Nix

# 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 "$(type -P git)" ]; then
echo "installing Git..."
nix-env -iA nixos.pkgs.git || nix-env -i git
fi
# Move any old nixpkgs directories out of the way.
backupTimestamp=$(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 ];
}