feat(grafana): jsonnet-based dashboards

Signed-off-by: Raito Bezarius <masterancpp@gmail.com>

dashboards/default.nix

@@ -0,0 +1,21 @@
+{ stdenv, jsonnet, fetchFromGitHub, lib, ... }:
+rec {
+  grafonnet = fetchFromGitHub {
+    owner = "grafana";
+    repo = "grafonnet-lib";
+    # TODO: figure out how to read the jsonnet lockfile
+    # and propagate this a bit cleverly.
+    rev = "a1d61cce1da59c71409b99b5c7568511fec661ea";
+    hash = "sha256-fs5JZJbcL6sQXBjYhp5eeRtjTFw0J1O/BcwBC8Vm9EM=";
+  };
+  buildJsonnetDashboards = dashboardSrc: target: stdenv.mkDerivation {
+    name = "jsonnet-grafana-dashboard-${baseNameOf target}";
+    src = dashboardSrc;
+    buildInputs = [ jsonnet ];
+    buildPhase = ''
+      runHook preBuild
+      jsonnet -J ${grafonnet} --ext-code publish=false ${target} > $out
+      runHook postBuild
+    '';
+  };
+}

flake.lock

@@ -385,6 +385,22 @@
         "type": "github"
       }
     },
+    "gerrit-dashboard": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1724491526,
+        "narHash": "sha256-iBI8Rkcv3CYdZHz5hDI0104C+DgPZRh5K6Zcqz9iUWw=",
+        "ref": "refs/heads/master",
+        "rev": "d6badc64723b888a4cfa0cf966aec8b91dcb8a2b",
+        "revCount": 74,
+        "type": "git",
+        "url": "https://git.lix.systems/the-distro/gerrit-monitoring.git"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://git.lix.systems/the-distro/gerrit-monitoring.git"
+      }
+    },
     "grapevine": {
       "inputs": {
         "attic": "attic",
@@ -669,6 +685,7 @@
         "agenix": "agenix",
         "buildbot-nix": "buildbot-nix",
         "colmena": "colmena",
+        "gerrit-dashboard": "gerrit-dashboard",
         "grapevine": "grapevine",
         "hydra": "hydra",
         "lix": [

flake.nix

@@ -19,6 +19,9 @@
     nix-gerrit.url = "git+https://git.lix.systems/the-distro/nix-gerrit.git";
     nix-gerrit.inputs.nixpkgs.follows = "nixpkgs";
 
+    gerrit-dashboard.url = "git+https://git.lix.systems/the-distro/gerrit-monitoring.git";
+    gerrit-dashboard.flake = false;
+
     buildbot-nix.url = "git+https://git.lix.systems/lix-project/buildbot-nix.git?ref=refs/heads/non-flakes";
     buildbot-nix.inputs.nixpkgs.follows = "nixpkgs";