1 files changed, 107 insertions, 0 deletions
diff --git a/nixpkgs/nixos/tests/sysinit-reactivation.nix b/nixpkgs/nixos/tests/sysinit-reactivation.nix
new file mode 100644
index 000000000000..1a0caecb610a
--- /dev/null
+++ b/nixpkgs/nixos/tests/sysinit-reactivation.nix
@@ -0,0 +1,107 @@
+# This runs to two scenarios but in one tests:
+# - A post-sysinit service needs to be restarted AFTER tmpfiles was restarted.
+# - A service needs to be restarted BEFORE tmpfiles is restarted
+
+{ lib, ... }:
+
+let
+  makeGeneration = generation: {
+    "${generation}".configuration = {
+      systemd.services.pre-sysinit-before-tmpfiles.environment.USER =
+        lib.mkForce "${generation}-tmpfiles-user";
+
+      systemd.services.pre-sysinit-after-tmpfiles.environment = {
+        NEEDED_PATH = lib.mkForce "/run/${generation}-needed-by-pre-sysinit-after-tmpfiles";
+        PATH_TO_CREATE = lib.mkForce "/run/${generation}-needed-by-post-sysinit";
+      };
+
+      systemd.services.post-sysinit.environment = {
+        NEEDED_PATH = lib.mkForce "/run/${generation}-needed-by-post-sysinit";
+        PATH_TO_CREATE = lib.mkForce "/run/${generation}-created-by-post-sysinit";
+      };
+
+      systemd.tmpfiles.settings.test = lib.mkForce {
+        "/run/${generation}-needed-by-pre-sysinit-after-tmpfiles".f.user =
+          "${generation}-tmpfiles-user";
+      };
+    };
+  };
+in
+
+{
+
+  name = "sysinit-reactivation";
+
+  meta.maintainers = with lib.maintainers; [ nikstur ];
+
+  nodes.machine = { config, lib, pkgs, ... }: {
+    systemd.services.pre-sysinit-before-tmpfiles = {
+      wantedBy = [ "sysinit.target" ];
+      requiredBy = [ "sysinit-reactivation.target" ];
+      before = [ "systemd-tmpfiles-setup.service" "systemd-tmpfiles-resetup.service" ];
+      unitConfig.DefaultDependencies = false;
+      serviceConfig.Type = "oneshot";
+      serviceConfig.RemainAfterExit = true;
+      environment.USER = "tmpfiles-user";
+      script = "${pkgs.shadow}/bin/useradd $USER";
+    };
+
+    systemd.services.pre-sysinit-after-tmpfiles = {
+      wantedBy = [ "sysinit.target" ];
+      requiredBy = [ "sysinit-reactivation.target" ];
+      after = [ "systemd-tmpfiles-setup.service" "systemd-tmpfiles-resetup.service" ];
+      unitConfig.DefaultDependencies = false;
+      serviceConfig.Type = "oneshot";
+      serviceConfig.RemainAfterExit = true;
+      environment = {
+        NEEDED_PATH = "/run/needed-by-pre-sysinit-after-tmpfiles";
+        PATH_TO_CREATE = "/run/needed-by-post-sysinit";
+      };
+      script = ''
+        if [[ -e $NEEDED_PATH ]]; then
+          touch $PATH_TO_CREATE
+        fi
+      '';
+    };
+
+    systemd.services.post-sysinit = {
+      wantedBy = [ "default.target" ];
+      serviceConfig.Type = "oneshot";
+      serviceConfig.RemainAfterExit = true;
+      environment = {
+        NEEDED_PATH = "/run/needed-by-post-sysinit";
+        PATH_TO_CREATE = "/run/created-by-post-sysinit";
+      };
+      script = ''
+        if [[ -e $NEEDED_PATH ]]; then
+          touch $PATH_TO_CREATE
+        fi
+      '';
+    };
+
+    systemd.tmpfiles.settings.test = {
+      "/run/needed-by-pre-sysinit-after-tmpfiles".f.user =
+        "tmpfiles-user";
+    };
+
+    specialisation = lib.mkMerge [
+      (makeGeneration "second")
+      (makeGeneration "third")
+    ];
+  };
+
+  testScript = { nodes, ... }: ''
+    def switch(generation):
+      toplevel = "${nodes.machine.system.build.toplevel}";
+      machine.succeed(f"{toplevel}/specialisation/{generation}/bin/switch-to-configuration switch")
+
+    machine.wait_for_unit("default.target")
+    machine.succeed("test -e /run/created-by-post-sysinit")
+
+    switch("second")
+    machine.succeed("test -e /run/second-created-by-post-sysinit")
+
+    switch("third")
+    machine.succeed("test -e /run/third-created-by-post-sysinit")
+  '';
+}