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nixos/filesystems: don't allow mountpoints with trailing slash

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They are semantically the same as the non-slash version and therefore
are potential source of duplicates.

Also fixes https://github.com/NixOS/nixpkgs/issues/78951

Alternative to https://github.com/NixOS/nixpkgs/pull/95308
This commit is contained in:
Jörg Thalheim 2020-08-14 07:25:50 +01:00
parent 01ea0b5722
commit 76360c005f
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GPG Key ID: B3F5D81B0C6967C4
1 changed files with 5 additions and 4 deletions
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9
nixos/modules/tasks/filesystems.nix
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@ -7,8 +7,9 @@ let
addCheckDesc = desc: elemType: check: types.addCheck elemType check
// { description = "${elemType.description} (with check: ${desc})"; };
nonEmptyStr = addCheckDesc "non-empty" types.str
(x: x != "" && ! (all (c: c == " " || c == "\t") (stringToCharacters x)));
isNonEmpty = s: (builtins.match "[ \t\n]*" s) == null;
nonEmptyStr = addCheckDesc "non-empty" types.str isNonEmpty;
fileSystems' = toposort fsBefore (attrValues config.fileSystems);
@ -28,10 +29,10 @@ let
coreFileSystemOpts = { name, config, ... }: {
options = {
mountPoint = mkOption {
example = "/mnt/usb";
type = nonEmptyStr;
type = addCheckDesc "non-empty without trailing slash" types.str
(s: isNonEmpty s && (builtins.match ".+/" s) == null);
description = "Location of the mounted the file system.";
};