nixos/jenkins: set StateDirectory if home is /var/lib/jenkins

This will cause systemd to chown /var/lib/jenkins to the user that
the jenkins systemd service runs as, fixing permission issues when
mounting /var/lib/jenkins from another data volume.

It uses the same logic that garage is using, too, checking for the
prefix.

1 files changed, 1 insertions, 0 deletions

diff --git a/nixos/modules/services/continuous-integration/jenkins/default.nix b/nixos/modules/services/continuous-integration/jenkins/default.nix
index e96743784e047..d69cf4587aaba 100644
--- a/nixos/modules/services/continuous-integration/jenkins/default.nix
+++ b/nixos/modules/services/continuous-integration/jenkins/default.nix
@@ -236,6 +236,7 @@ in {
 
       serviceConfig = {
         User = cfg.user;
+        StateDirectory = mkIf (hasPrefix "/var/lib/jenkins" cfg.home) "jenkins";
       };
     };
   };