943592f698
Among other things, this will allow *2nix tools to output plain data while still being composable with the traditional callPackage/.override interfaces.
102 lines
2.9 KiB
Nix
102 lines
2.9 KiB
Nix
{ config, lib, pkgs, modules, ... }:
|
|
|
|
with lib;
|
|
|
|
let
|
|
|
|
# Location of the repository on the harddrive
|
|
nixosPath = toString ../..;
|
|
|
|
# Check if the path is from the NixOS repository
|
|
isNixOSFile = path:
|
|
let s = toString path; in
|
|
removePrefix nixosPath s != s;
|
|
|
|
# Copy modules given as extra configuration files. Unfortunately, we
|
|
# cannot serialized attribute set given in the list of modules (that's why
|
|
# you should use files).
|
|
moduleFiles =
|
|
# FIXME: use typeOf (Nix 1.6.1).
|
|
filter (x: !isAttrs x && !lib.isFunction x) modules;
|
|
|
|
# Partition module files because between NixOS and non-NixOS files. NixOS
|
|
# files may change if the repository is updated.
|
|
partitionedModuleFiles =
|
|
let p = partition isNixOSFile moduleFiles; in
|
|
{ nixos = p.right; others = p.wrong; };
|
|
|
|
# Path transformed to be valid on the installation device. Thus the
|
|
# device configuration could be rebuild.
|
|
relocatedModuleFiles =
|
|
let
|
|
relocateNixOS = path:
|
|
"<nixpkgs/nixos" + removePrefix nixosPath (toString path) + ">";
|
|
relocateOthers = null;
|
|
in
|
|
{ nixos = map relocateNixOS partitionedModuleFiles.nixos;
|
|
others = []; # TODO: copy the modules to the install-device repository.
|
|
};
|
|
|
|
# A dummy /etc/nixos/configuration.nix in the booted CD that
|
|
# rebuilds the CD's configuration (and allows the configuration to
|
|
# be modified, of course, providing a true live CD). Problem is
|
|
# that we don't really know how the CD was built - the Nix
|
|
# expression language doesn't allow us to query the expression being
|
|
# evaluated. So we'll just hope for the best.
|
|
configClone = pkgs.writeText "configuration.nix"
|
|
''
|
|
{ config, pkgs, ... }:
|
|
|
|
{
|
|
imports = [ ${toString config.installer.cloneConfigIncludes} ];
|
|
}
|
|
'';
|
|
|
|
in
|
|
|
|
{
|
|
|
|
options = {
|
|
|
|
installer.cloneConfig = mkOption {
|
|
default = true;
|
|
description = ''
|
|
Try to clone the installation-device configuration by re-using it's
|
|
profile from the list of imported modules.
|
|
'';
|
|
};
|
|
|
|
installer.cloneConfigIncludes = mkOption {
|
|
default = [];
|
|
example = [ "./nixos/modules/hardware/network/rt73.nix" ];
|
|
description = ''
|
|
List of modules used to re-build this installation device profile.
|
|
'';
|
|
};
|
|
|
|
};
|
|
|
|
config = {
|
|
|
|
installer.cloneConfigIncludes =
|
|
relocatedModuleFiles.nixos ++ relocatedModuleFiles.others;
|
|
|
|
boot.postBootCommands =
|
|
''
|
|
# Provide a mount point for nixos-install.
|
|
mkdir -p /mnt
|
|
|
|
${optionalString config.installer.cloneConfig ''
|
|
# Provide a configuration for the CD/DVD itself, to allow users
|
|
# to run nixos-rebuild to change the configuration of the
|
|
# running system on the CD/DVD.
|
|
if ! [ -e /etc/nixos/configuration.nix ]; then
|
|
cp ${configClone} /etc/nixos/configuration.nix
|
|
fi
|
|
''}
|
|
'';
|
|
|
|
};
|
|
|
|
}
|