diff options
Diffstat (limited to 'nixos/modules/image')
| -rw-r--r-- | nixos/modules/image/repart.nix | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/nixos/modules/image/repart.nix b/nixos/modules/image/repart.nix index 1a43297f4b432..569d4a4b00215 100644 --- a/nixos/modules/image/repart.nix +++ b/nixos/modules/image/repart.nix @@ -6,6 +6,8 @@ let cfg = config.image.repart; + inherit (utils.systemdUtils.lib) GPTMaxLabelLength; + partitionOptions = { options = { storePaths = lib.mkOption { @@ -224,6 +226,42 @@ in config = { + assertions = lib.mapAttrsToList (fileName: partitionConfig: + let + inherit (partitionConfig) repartConfig; + labelLength = builtins.stringLength repartConfig.Label; + in + { + assertion = repartConfig ? Label -> GPTMaxLabelLength >= labelLength; + message = '' + The partition label '${repartConfig.Label}' + defined for '${fileName}' is ${toString labelLength} characters long, + but the maximum label length supported by UEFI is ${toString + GPTMaxLabelLength}. + ''; + } + ) cfg.partitions; + + warnings = lib.filter (v: v != null) (lib.mapAttrsToList (fileName: partitionConfig: + let + inherit (partitionConfig) repartConfig; + suggestedMaxLabelLength = GPTMaxLabelLength - 2; + labelLength = builtins.stringLength repartConfig.Label; + in + if (repartConfig ? Label && labelLength >= suggestedMaxLabelLength) then '' + The partition label '${repartConfig.Label}' + defined for '${fileName}' is ${toString labelLength} characters long. + The suggested maximum label length is ${toString + suggestedMaxLabelLength}. + + If you use sytemd-sysupdate style A/B updates, this might + not leave enough space to increment the version number included in + the label in a future release. For example, if your label is + ${toString GPTMaxLabelLength} characters long (the maximum enforced by UEFI) and + you're at version 9, you cannot increment this to 10. + '' else null + ) cfg.partitions); + image.repart = let version = config.image.repart.version; |