modules/passthruSystemdAnalyze: init

2026-06-06 22:57:40 +09:00
parent 862e370ab1
commit fd0a972b04
2 changed files with 62 additions and 0 deletions
@@ -0,0 +1,61 @@
+{ config, lib, pkgs, ... }:
+{
+  passthru = {
+    systemdAnalyze = lib.mapAttrs (s: _: let
+      # NOTE: systemd-analyze needs /run/systemd; bubblewrap is used to provide a fake environment.
+      bwrapFlags =  (lib.escapeShellArgs [
+        "--dev" "/dev"
+        "--bind" "/nix" "/nix"
+        "--tmpfs" "/tmp"
+        "--tmpfs" "/run/systemd"
+        "--bind" "/bin" "/bin"
+        "--bind" "${config.system.build.etc}/etc/systemd/system/${s}.service" "/etc/systemd/system/${s}.service"
+      ]) + " --tmpfs \"$HOME\"";
+    in {
+      security = pkgs.stdenv.mkDerivation (finalAttrs: {
+        name = "systemd-analyze-security-${s}-output";
+        preferLocalBuild = true;
+        dontUnpack = true;
+        dontBuild = true;
+        dontFixup = true;
+
+        installPhase = ''
+          runHook preInstall
+
+          if [ -f '${config.system.build.etc}/etc/systemd/system/${s}.service' ]; then
+            mkdir -p "$(dirname "$out")"
+            ${lib.getExe pkgs.bubblewrap} ${bwrapFlags} ${lib.getExe' pkgs.systemd "systemd-analyze"} security --offline true ${config.system.build.etc}/etc/systemd/system/${s}.service > "$out" || touch "$out"
+          else
+            touch "$out"
+          fi
+
+          runHook postInstall
+        '';
+
+        passthru.finalScore = lib.pipe finalAttrs.finalPackage [
+          lib.readFile
+          (x: if x == "" then null else lib.pipe x [
+            lib.trim
+            (lib.splitString "\n")
+            lib.last
+            (lib.match ".*([0-9])\\.([0-9]).*")
+            (digits: (lib.toIntBase10 (lib.head digits)) + (lib.toIntBase10 (lib.last digits)) * 0.1)
+          ])
+        ];
+      });
+
+      verify = pkgs.runCommandLocal "systemd-analyze-verify-${s}-output" { } ''
+        mkdir -p "$(dirname "$out")"
+        ${lib.getExe pkgs.bubblewrap} ${bwrapFlags} ${lib.getExe' pkgs.systemd "systemd-analyze"} verify --man=no ${config.system.build.etc}/etc/systemd/system/${s}.service |& tee "$out"
+      '';
+    }) config.systemd.services;
+
+    systemdSecurityScores =
+      # NOTE: force all 'security' instantiations to build in parallel
+      builtins.seq
+        (builtins.readDir
+          (pkgs.linkFarm "systemd-analyze-security-all-outputs"
+            (lib.mapAttrs (s: _: config.passthru.systemdAnalyze.${s}.security) config.systemd.services)))
+        lib.mapAttrs (s: _: config.passthru.systemdAnalyze.${s}.security.finalScore) config.systemd.services;
+  };
+}