0b9d9eded1
Let's first try if we can determine the Git revision from the .git
directory and if that fails, fall back to get the info from the
".git-revision" file... and after that use something generic like
"master".
This should address #17218 in better way, because we don't need to
create another redundant file in the source checkout of nixpkgs.
I'm not going to route of falling back to using .git, because after
55d881e, we already have ".git-revision" files in people's Git
repositories, which in turn means that nixos-version will report that
old file every time even if the working tree has updated.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
Cc: @bennofs, Profpatsch
Reported-by: @devhell
Fixes: #17218
117 lines
3.6 KiB
Nix
117 lines
3.6 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.system;
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releaseFile = "${toString pkgs.path}/.version";
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suffixFile = "${toString pkgs.path}/.version-suffix";
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revisionFile = "${toString pkgs.path}/.git-revision";
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gitRepo = "${toString pkgs.path}/.git";
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gitCommitId = lib.substring 0 7 (commitIdFromGitRepo gitRepo);
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in
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{
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options.system = {
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stateVersion = mkOption {
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type = types.str;
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default = cfg.nixosRelease;
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description = ''
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Every once in a while, a new NixOS release may change
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configuration defaults in a way incompatible with stateful
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data. For instance, if the default version of PostgreSQL
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changes, the new version will probably be unable to read your
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existing databases. To prevent such breakage, you can set the
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value of this option to the NixOS release with which you want
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to be compatible. The effect is that NixOS will option
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defaults corresponding to the specified release (such as using
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an older version of PostgreSQL).
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'';
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};
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nixosLabel = mkOption {
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type = types.str;
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description = ''
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Label to be used in the names of generated outputs and boot
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labels.
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'';
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};
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nixosVersion = mkOption {
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internal = true;
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type = types.str;
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description = "The full NixOS version (e.g. <literal>16.03.1160.f2d4ee1</literal>).";
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};
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nixosRelease = mkOption {
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readOnly = true;
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type = types.str;
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default = fileContents releaseFile;
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description = "The NixOS release (e.g. <literal>16.03</literal>).";
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};
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nixosVersionSuffix = mkOption {
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internal = true;
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type = types.str;
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default = if pathExists suffixFile then fileContents suffixFile else "pre-git";
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description = "The NixOS version suffix (e.g. <literal>1160.f2d4ee1</literal>).";
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};
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nixosRevision = mkOption {
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internal = true;
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type = types.str;
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default = if pathIsDirectory gitRepo then commitIdFromGitRepo gitRepo
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else if pathExists revisionFile then fileContents revisionFile
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else "master";
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description = "The Git revision from which this NixOS configuration was built.";
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};
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nixosCodeName = mkOption {
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readOnly = true;
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type = types.str;
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description = "The NixOS release code name (e.g. <literal>Emu</literal>).";
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};
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defaultChannel = mkOption {
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internal = true;
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type = types.str;
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default = https://nixos.org/channels/nixos-unstable;
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description = "Default NixOS channel to which the root user is subscribed.";
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};
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};
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config = {
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system = {
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# These defaults are set here rather than up there so that
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# changing them would not rebuild the manual
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nixosLabel = mkDefault cfg.nixosVersion;
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nixosVersion = mkDefault (cfg.nixosRelease + cfg.nixosVersionSuffix);
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nixosRevision = mkIf (pathIsDirectory gitRepo) (mkDefault gitCommitId);
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nixosVersionSuffix = mkIf (pathIsDirectory gitRepo) (mkDefault (".git." + gitCommitId));
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# Note: code names must only increase in alphabetical order.
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nixosCodeName = "Flounder";
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};
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# Generate /etc/os-release. See
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# http://0pointer.de/public/systemd-man/os-release.html for the
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# format.
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environment.etc."os-release".text =
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''
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NAME=NixOS
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ID=nixos
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VERSION="${config.system.nixosVersion} (${config.system.nixosCodeName})"
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VERSION_ID="${config.system.nixosVersion}"
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PRETTY_NAME="NixOS ${config.system.nixosVersion} (${config.system.nixosCodeName})"
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HOME_URL="http://nixos.org/"
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'';
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};
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}
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