diff options
Diffstat (limited to 'nixpkgs/nixos/modules/installer/cd-dvd/channel.nix')
-rw-r--r-- | nixpkgs/nixos/modules/installer/cd-dvd/channel.nix | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/nixpkgs/nixos/modules/installer/cd-dvd/channel.nix b/nixpkgs/nixos/modules/installer/cd-dvd/channel.nix new file mode 100644 index 000000000000..ab5e7c0645f3 --- /dev/null +++ b/nixpkgs/nixos/modules/installer/cd-dvd/channel.nix @@ -0,0 +1,47 @@ +# Provide an initial copy of the NixOS channel so that the user +# doesn't need to run "nix-channel --update" first. + +{ config, lib, pkgs, ... }: + +with lib; + +let + nixpkgs = lib.cleanSource pkgs.path; + + # We need a copy of the Nix expressions for Nixpkgs and NixOS on the + # CD. These are installed into the "nixos" channel of the root + # user, as expected by nixos-rebuild/nixos-install. FIXME: merge + # with make-channel.nix. + channelSources = pkgs.runCommand "nixos-${config.system.nixos.version}" + { preferLocalBuild = true; } + '' + mkdir -p $out + cp -prd ${nixpkgs.outPath} $out/nixos + chmod -R u+w $out/nixos + if [ ! -e $out/nixos/nixpkgs ]; then + ln -s . $out/nixos/nixpkgs + fi + echo -n ${config.system.nixos.revision} > $out/nixos/.git-revision + echo -n ${config.system.nixos.versionSuffix} > $out/nixos/.version-suffix + echo ${config.system.nixos.versionSuffix} | sed -e s/pre// > $out/nixos/svn-revision + ''; + +in + +{ + # Provide the NixOS/Nixpkgs sources in /etc/nixos. This is required + # for nixos-install. + boot.postBootCommands = mkAfter + '' + if ! [ -e /var/lib/nixos/did-channel-init ]; then + echo "unpacking the NixOS/Nixpkgs sources..." + mkdir -p /nix/var/nix/profiles/per-user/root + ${config.nix.package.out}/bin/nix-env -p /nix/var/nix/profiles/per-user/root/channels \ + -i ${channelSources} --quiet --option build-use-substitutes false + mkdir -m 0700 -p /root/.nix-defexpr + ln -s /nix/var/nix/profiles/per-user/root/channels /root/.nix-defexpr/channels + mkdir -m 0755 -p /var/lib/nixos + touch /var/lib/nixos/did-channel-init + fi + ''; +} |