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nixos: introduce system.nixosLabel option and use it where appropriate

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Setting nixosVersion to something custom is useful for meaningful GRUB
menus and /nix/store paths, but actuallly changing it rebulids the
whole system path (because of `nixos-version` script and manual
pages). Also, changing it is not a particularly good idea because you
can then be differentitated from other NixOS users by a lot of
programs that read /etc/os-release.

This patch introduces an alternative option that does all you want
from nixosVersion, but rebuilds only the very top system level and
/etc while using your label in the names of system /nix/store paths,
GRUB and other boot loaders' menus, getty greetings and so on.
This commit is contained in:
Jan Malakhovski 2015-09-18 16:50:48 +00:00
parent 732eb3c4cc
commit 119c8f91e7
10 changed files with 52 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
nixos/modules/installer/cd-dvd/installation-cd-base.nix
View File

@ -16,7 +16,7 @@ with lib;
];
# ISO naming.
isoImage.isoName = "${config.isoImage.isoBaseName}-${config.system.nixosVersion}-${pkgs.stdenv.system}.iso";
isoImage.isoName = "${config.isoImage.isoBaseName}-${config.system.nixosLabel}-${pkgs.stdenv.system}.iso";
isoImage.volumeID = substring 0 11 "NIXOS_ISO";

2
nixos/modules/installer/cd-dvd/iso-image.nix
View File

@ -39,7 +39,7 @@ let
DEFAULT boot
LABEL boot
MENU LABEL NixOS ${config.system.nixosVersion}${config.isoImage.appendToMenuLabel}
MENU LABEL NixOS ${config.system.nixosLabel}${config.isoImage.appendToMenuLabel}
LINUX /boot/bzImage
APPEND init=${config.system.build.toplevel}/init ${toString config.boot.kernelParams}
INITRD /boot/initrd

28
nixos/modules/misc/version.nix
View File

@ -30,6 +30,29 @@ in
'';
};
nixosLabel = mkOption {
type = types.str;
description = ''
NixOS version name to be used in the names of generated
outputs and boot labels.
If you ever wanted to influence the labels in your GRUB menu,
this is option is for you.
Can be set directly or with <envar>NIXOS_LABEL</envar>
environment variable for <command>nixos-rebuild</command>,
e.g.:
<screen>
#!/bin/sh
today=`date +%Y%m%d`
branch=`(cd nixpkgs ; git branch 2>/dev/null | sed -n '/^\* / { s|^\* ||; p; }')`
revision=`(cd nixpkgs ; git rev-parse HEAD)`
export NIXOS_LABEL="$today.$branch-''${revision:0:7}"
nixos-rebuild switch</screen>
'';
};
nixosVersion = mkOption {
internal = true;
type = types.str;
@ -75,8 +98,9 @@ in
config = {
system = {
# This is set here rather than up there so that changing this
# env variable will not rebuild the manual
# These defaults are set here rather than up there so that
# changing them would not rebuild the manual
nixosLabel = mkDefault (maybeEnv "NIXOS_LABEL" cfg.nixosVersion);
nixosVersion = mkDefault (maybeEnv "NIXOS_VERSION" (cfg.nixosRelease + cfg.nixosVersionSuffix));
# Note: code names must only increase in alphabetical order.

20
nixos/modules/services/ttys/agetty.nix
View File

@ -2,6 +2,13 @@
with lib;
let
autologinArg = optionalString (config.services.mingetty.autologinUser != null) "--autologin ${config.services.mingetty.autologinUser}";
gettyCmd = extraArgs: "@${pkgs.utillinux}/sbin/agetty agetty --login-program ${pkgs.shadow}/bin/login ${autologinArg} ${extraArgs}";
in
{
###### interface
@ -21,9 +28,9 @@ with lib;
greetingLine = mkOption {
type = types.str;
default = ''<<< Welcome to NixOS ${config.system.nixosVersion} (\m) - \l >>>'';
description = ''
Welcome line printed by mingetty.
The default shows current NixOS version label, machine type and tty.
'';
};
@ -55,10 +62,11 @@ with lib;
###### implementation
config = let
autologinArg = optionalString (config.services.mingetty.autologinUser != null) "--autologin ${config.services.mingetty.autologinUser}";
gettyCmd = extraArgs: "@${pkgs.utillinux}/sbin/agetty agetty --login-program ${pkgs.shadow}/bin/login ${autologinArg} ${extraArgs}";
in {
config = {
# Note: this is set here rather than up there so that changing
# nixosLabel would not rebuild manual pages
services.mingetty.greetingLine = mkDefault ''<<< Welcome to NixOS ${config.system.nixosLabel} (\m) - \l >>>'';
systemd.services."getty@" =
{ serviceConfig.ExecStart = gettyCmd "--noclear --keep-baud %I 115200,38400,9600 $TERM";
restartIfChanged = false;
@ -81,7 +89,7 @@ with lib;
{ serviceConfig.ExecStart = gettyCmd "--noclear --keep-baud console 115200,38400,9600 $TERM";
serviceConfig.Restart = "always";
restartIfChanged = false;
enable = mkDefault config.boot.isContainer;
enable = mkDefault config.boot.isContainer;
};
environment.etc = singleton

6
nixos/modules/system/activation/top-level.nix
View File

@ -67,7 +67,7 @@ let
echo -n "$configurationName" > $out/configuration-name
echo -n "systemd ${toString config.systemd.package.interfaceVersion}" > $out/init-interface-version
echo -n "$nixosVersion" > $out/nixos-version
echo -n "$nixosLabel" > $out/nixos-version
echo -n "$system" > $out/system
mkdir $out/fine-tune
@ -101,7 +101,7 @@ let
if [] == failed then pkgs.stdenv.mkDerivation {
name = let hn = config.networking.hostName;
nn = if (hn != "") then hn else "unnamed";
in "nixos-system-${nn}-${config.system.nixosVersion}";
in "nixos-system-${nn}-${config.system.nixosLabel}";
preferLocalBuild = true;
allowSubstitutes = false;
buildCommand = systemBuilder;
@ -115,7 +115,7 @@ let
config.system.build.installBootLoader
or "echo 'Warning: do not know how to make this configuration bootable; please enable a boot loader.' 1>&2; true";
activationScript = config.system.activationScripts.script;
nixosVersion = config.system.nixosVersion;
nixosLabel = config.system.nixosLabel;
configurationName = config.boot.loader.grub.configurationName;

4
nixos/modules/system/boot/loader/generic-extlinux-compatible/extlinux-conf-builder.sh
View File

@ -83,7 +83,7 @@ addEntry() {
timestampEpoch=$(stat -L -c '%Z' $path)
timestamp=$(date "+%Y-%m-%d %H:%M" -d @$timestampEpoch)
nixosVersion="$(cat $path/nixos-version)"
nixosLabel="$(cat $path/nixos-version)"
extraParams="$(cat $path/kernel-params)"
echo
@ -91,7 +91,7 @@ addEntry() {
if [ "$tag" = "default" ]; then
echo " MENU LABEL NixOS - Default"
else
echo " MENU LABEL NixOS - Configuration $tag ($timestamp - $nixosVersion)"
echo " MENU LABEL NixOS - Configuration $tag ($timestamp - $nixosLabel)"
fi
echo " LINUX ../nixos/$(basename $kernel)"
echo " INITRD ../nixos/$(basename $initrd)"

2
nixos/modules/virtualisation/azure-image.nix
View File

@ -26,7 +26,7 @@ in
${pkgs.vmTools.qemu}/bin/qemu-img convert -f raw -O vpc $diskImage $out/disk.vhd
rm $diskImage
'';
diskImageBase = "nixos-image-${config.system.nixosVersion}-${pkgs.stdenv.system}.raw";
diskImageBase = "nixos-image-${config.system.nixosLabel}-${pkgs.stdenv.system}.raw";
buildInputs = [ pkgs.utillinux pkgs.perl ];
exportReferencesGraph =
[ "closure" config.system.build.toplevel ];

2
nixos/modules/virtualisation/brightbox-image.nix
View File

@ -26,7 +26,7 @@ in
rm $diskImageBase
popd
'';
diskImageBase = "nixos-image-${config.system.nixosVersion}-${pkgs.stdenv.system}.raw";
diskImageBase = "nixos-image-${config.system.nixosLabel}-${pkgs.stdenv.system}.raw";
buildInputs = [ pkgs.utillinux pkgs.perl ];
exportReferencesGraph =
[ "closure" config.system.build.toplevel ];

2
nixos/modules/virtualisation/google-compute-image.nix
View File

@ -30,7 +30,7 @@ in
rm $out/disk.raw
popd
'';
diskImageBase = "nixos-image-${config.system.nixosVersion}-${pkgs.stdenv.system}.raw";
diskImageBase = "nixos-image-${config.system.nixosLabel}-${pkgs.stdenv.system}.raw";
buildInputs = [ pkgs.utillinux pkgs.perl ];
exportReferencesGraph =
[ "closure" config.system.build.toplevel ];

4
nixos/modules/virtualisation/virtualbox-image.nix
View File

@ -44,8 +44,8 @@ in {
system.build.virtualBoxOVA = pkgs.runCommand "virtualbox-ova"
{ buildInputs = [ pkgs.linuxPackages.virtualbox ];
vmName = "NixOS ${config.system.nixosVersion} (${pkgs.stdenv.system})";
fileName = "nixos-image-${config.system.nixosVersion}-${pkgs.stdenv.system}.ova";
vmName = "NixOS ${config.system.nixosLabel} (${pkgs.stdenv.system})";
fileName = "nixos-image-${config.system.nixosLabel}-${pkgs.stdenv.system}.ova";
}
''
echo "creating VirtualBox VM..."