From 11e0992d9952ae22832623430aafa8ee4ab369d6 Mon Sep 17 00:00:00 2001
From: Noah Masur <7386960+nmasur@users.noreply.github.com>
Date: Wed, 23 Apr 2025 19:20:45 +0000
Subject: [PATCH] semi-failed packaging of actual budget prometheus exporter

---
 pkgs/prometheus-actual-exporter/package.nix   | 91 +++++++++++++++++++
 .../prometheus-actual-exporter/tsconfig.patch | 12 +++
 .../services/actualbudget/actualbudget.nix    | 32 ++++++-
 .../modules/nmasur/presets/services/caddy.nix |  3 +-
 4 files changed, 134 insertions(+), 4 deletions(-)
 create mode 100644 pkgs/prometheus-actual-exporter/package.nix
 create mode 100644 pkgs/prometheus-actual-exporter/tsconfig.patch

diff --git a/pkgs/prometheus-actual-exporter/package.nix b/pkgs/prometheus-actual-exporter/package.nix
new file mode 100644
index 0000000..e56f38a
--- /dev/null
+++ b/pkgs/prometheus-actual-exporter/package.nix
@@ -0,0 +1,91 @@
+{
+  lib,
+  fetchFromGitHub,
+  nodejs_18,
+  buildNpmPackage,
+  nodePackages,
+  python3,
+  gcc,
+  gnumake,
+}:
+let
+
+in
+
+buildNpmPackage (finalAttrs: rec {
+  pname = "prometheus-actual-exporter";
+
+  version = "1.1.5";
+
+  src = fetchFromGitHub {
+    owner = "sakowicz";
+    repo = "actual-budget-prometheus-exporter";
+    tag = version;
+    hash = "sha256-DAmWr1HngxAjhOJW9OnMfDqpxBcZT+Tpew/w/YYJIYU=";
+  };
+
+  patches = [ ./tsconfig.patch ];
+
+  npmDepsHash = "sha256-N8xqRYFelolNGTEhG22M7KJ7B5U/uW7o+/XfLF8rHMg=";
+
+  nativeBuildInputs = [
+    nodejs_18
+    nodePackages.typescript
+    python3
+    nodePackages.node-gyp
+    gcc
+    gnumake
+  ];
+
+  postPatch = ''
+    echo "Removing better-sqlite3 install script before npm install"
+    sed -i '/"install"/d' node_modules/better-sqlite3/package.json || true
+    sed -i '/"install"/d' package.json || true
+  '';
+
+  preBuild = ''
+    echo "Disabling prebuilt install script from better-sqlite3"
+    find node_modules/better-sqlite3 -name package.json -exec sed -i '/"install"/d' {} +
+    rm -f node_modules/better-sqlite3/build/Release/better_sqlite3.node || true
+  '';
+
+  buildPhase = ''
+    # export npm_config_build_from_source=true
+    # export npm_config_unsafe_perm=true
+    # export BINARY_SITE=none
+    # export PATH=${nodePackages.node-gyp}/bin:$PATH
+    # export npm_config_node_gyp=${nodePackages.node-gyp}/bin/node-gyp
+
+    # npm rebuild better-sqlite3 --build-from-source --verbose
+
+    npm run build
+  '';
+
+  installPhase = ''
+    mkdir -p $out/{bin,lib}
+    cp -r . $out/lib/prometheus-actual-exporter
+    makeWrapper ${lib.getExe nodejs_18} $out/bin/prometheus-actual-exporter \
+      --add-flags "$out/lib/prometheus-actual-exporter/dist/app.js"
+  '';
+
+  postInstall = ''
+    echo "Removing prebuilt .node and rebuilding better-sqlite3"
+
+    export npm_config_build_from_source=true
+    export npm_config_unsafe_perm=true
+    export BINARY_SITE=none
+    export PATH=${nodePackages.node-gyp}/bin:$PATH
+    export npm_config_node_gyp=${nodePackages.node-gyp}/bin/node-gyp
+
+    sed -i '/"install"/d' node_modules/better-sqlite3/package.json
+    rm -f node_modules/better-sqlite3/build/Release/better_sqlite3.node || true
+
+    npm rebuild better-sqlite3 --build-from-source --verbose
+  '';
+
+  meta = {
+    description = "Prometheus exporter for Actual Budget";
+    homepage = "https://github.com/sakowicz/actual-budget-prometheus-exporter";
+    mainProgram = "prometheus-actual-exporter";
+  };
+})
diff --git a/pkgs/prometheus-actual-exporter/tsconfig.patch b/pkgs/prometheus-actual-exporter/tsconfig.patch
new file mode 100644
index 0000000..6e1fea1
--- /dev/null
+++ b/pkgs/prometheus-actual-exporter/tsconfig.patch
@@ -0,0 +1,12 @@
+diff --git a/tsconfig.json b/tsconfig.json
+index 5106135..3a340f6 100644
+--- a/tsconfig.json
++++ b/tsconfig.json
+@@ -8,5 +8,6 @@
+     "skipLibCheck": true,
+     "lib": ["es2020"],
+     "outDir": "./dist"
+-  }
++  },
++  "include": ["src/**/*", "app.ts"]
+ }
diff --git a/platforms/nixos/modules/nmasur/presets/services/actualbudget/actualbudget.nix b/platforms/nixos/modules/nmasur/presets/services/actualbudget/actualbudget.nix
index 10c5743..0060f80 100644
--- a/platforms/nixos/modules/nmasur/presets/services/actualbudget/actualbudget.nix
+++ b/platforms/nixos/modules/nmasur/presets/services/actualbudget/actualbudget.nix
@@ -1,5 +1,6 @@
 {
   config,
+  pkgs,
   lib,
   ...
 }:
@@ -18,6 +19,11 @@ in
       description = "Port to use for the localhost";
       default = 5006;
     };
+    prometheusPort = lib.mkOption {
+      type = lib.types.port;
+      description = "Port to use for prometheus actual exporter";
+      default = 5007;
+    };
   };
 
   config = lib.mkIf cfg.enable {
@@ -25,10 +31,30 @@ in
     services.actual = {
       enable = true;
       settings = {
-        port = 5006;
+        port = cfg.port;
       };
     };
 
+    # systemd.services.prometheus-actual-exporter = {
+    #   enable = true;
+    #   description = "Prometheus exporter for Actual budget";
+    #   serviceConfig = {
+    #     DynamicUser = true;
+    #     Environment = [
+    #       "ACTUAL_SERVER_URL=https://${hostnames.budget}:443"
+    #       "PORT=${builtins.toString cfg.prometheusPort}"
+    #     ];
+    #     EnvironmentFile = [
+    #       config.secrets.actualbudget-password.dest
+    #       config.secrets.actualbudget-budget-id.dest
+    #     ];
+    #     ExecStart = lib.getExe pkgs.nmasur.prometheus-actual-exporter;
+    #   };
+    #   wantedBy = [
+    #     "multi-user.target"
+    #   ];
+    # };
+
     # Used for prometheus exporter
     virtualisation.podman.enable = true;
 
@@ -66,7 +92,7 @@ in
     };
 
     nmasur.presets.services.prometheus-exporters.scrapeTargets = [
-      "127.0.0.1:5007"
+      "127.0.0.1:${builtins.toString cfg.prometheusPort}"
     ];
 
     secrets.actualbudget-password = {
@@ -99,7 +125,7 @@ in
     services.cloudflare-dyndns.domains = [ hostnames.budget ];
 
     # Backups
-    services.restic.backups.default.paths = [ "/var/lib/actualbudget" ];
+    services.restic.backups.default.paths = [ "/var/lib/actual" ];
 
   };
 
diff --git a/platforms/nixos/modules/nmasur/presets/services/caddy.nix b/platforms/nixos/modules/nmasur/presets/services/caddy.nix
index c954024..75a2e3b 100644
--- a/platforms/nixos/modules/nmasur/presets/services/caddy.nix
+++ b/platforms/nixos/modules/nmasur/presets/services/caddy.nix
@@ -103,8 +103,9 @@ in
                   value = name;
                 }) hostname_map;
               };
+
+              metrics = { }; # Enables Prometheus metrics
             };
-            apps.http.servers.metrics = { }; # Enables Prometheus metrics
             apps.tls.automation.policies = cfg.tlsPolicies;
 
             # Setup logging to journal and files