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[NonPersistence] Parameterize persistence folder

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This commit is contained in:
Antoine Viallon 2022-02-08 12:13:45 +01:00
parent 1e2feafd9f
commit 9765bc6321
Signed by: aviallon
GPG key ID: 186FC35EDEB25716
1 changed files with 23 additions and 6 deletions
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29
non-persistence.nix
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@ -2,15 +2,32 @@
with lib;
let
cfg = config.aviallon.non-persistence;
impermanenceSrc = builtins.fetchGit {
url = "https://github.com/nix-community/impermanence.git";
ref = "master";
rev = "ff2240b04ffb9322241b9f6374305cbf6a98a285";
};
persistFolder = "/persist";
impermanence = import "${impermanenceSrc}/nixos.nix";
mkLink = dest: src: ''L+ "${dest}" - - - - ${src}'';
mkDir = dest: ''d "${dest}" - - - -'';
mkPersist = path: concatLists [
(optional (dirOf path != path) (mkDir (dirOf path)))
[ (mkLink path "${persistFolder}/${path}") ]
];
in
{
imports = [
impermanence
];
options.aviallon.non-persistence = {
enable = mkEnableOption "non-persitent root";
};
config = mkIf cfg.enable {
assertions = [
{ assertion = hasAttr "/persist" config.fileSystems;
message = "A /persist partition is needed for non-persistence";
{ assertion = hasAttr persistFolder config.fileSystems;
message = "A ${persistFolder} partition is needed for non-persistence";
}
{ assertion = hasAttr "/var/log" config.fileSystems;
message = "A /var/log separate parition is needed to avoid missing early logs.";
@ -18,9 +35,9 @@ in
];
environment.etc = {
nixos.source = "/persist/etc/nixos";
NIXOS.source = "/persist/etc/NIXOS";
machine-id.source = "/persist/etc/machine-id";
nixos.source = "${persistFolder}/etc/nixos";
NIXOS.source = "${persistFolder}/etc/NIXOS";
machine-id.source = "${persistFolder}/etc/machine-id";
};
boot.tmpOnTmpfs = true;
@ -31,7 +48,7 @@ in
autoFormat = true;
label = "nixos-persistent-logs";
};
"/persist" = {
"${persistFolder}" = {
neededForBoot = true;
label = "nixos-persistent-data";
};