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home-environment: add home.uid option

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Add a home.uid option similar to home.username. When set, the
activation script verifies the current UID matches the expected
value using the new checkUid function.

When using the NixOS or nix-darwin modules, home.uid is
auto-discovered from users.users.<name>.uid when that value
is set.

This is useful for constructing paths that depend on the user's
UID, such as /run/user/<uid> paths for gpg-agent sockets or
other user-specific runtime directories.
This commit is contained in:
Bernardo Meurer 2025-12-03 22:52:03 +00:00 • committed by Matthieu Coudron
parent d441981b20
commit a521eab881
6 changed files with 38 additions and 0 deletions
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2
tests/modules/home-environment/default.nix
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@ -3,4 +3,6 @@
home-session-search-variables = ./session-search-variables.nix;
home-session-variables = ./session-variables.nix;
home-nixpkgs-release-check-pkgs = ./nixpkgs-release-check-pkgs.nix;
home-uid = ./uid.nix;
home-uid-null = ./uid-null.nix;
}

7
tests/modules/home-environment/uid-null.nix Normal file
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@ -0,0 +1,7 @@
{
# home.uid defaults to null, so checkUid should not be called in the activation script
nmt.script = ''
assertFileNotRegex activate "checkUid [0-9]+"
'';
}

7
tests/modules/home-environment/uid.nix Normal file
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@ -0,0 +1,7 @@
{
home.uid = 1000;
nmt.script = ''
assertFileContains activate "checkUid 1000"
'';
}