From 51ddcb481f73e90137a19b2948a77185d885b794 Mon Sep 17 00:00:00 2001
From: Marcel <me@m4rc3l.de>
Date: Sat, 12 Apr 2025 02:53:40 +0200
Subject: [PATCH 1/2] prometheus-mailman3-exporter: init at 0.9.1

---
 .../prometheus-mailman3-exporter/package.nix  | 63 +++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 pkgs/by-name/pr/prometheus-mailman3-exporter/package.nix

diff --git a/pkgs/by-name/pr/prometheus-mailman3-exporter/package.nix b/pkgs/by-name/pr/prometheus-mailman3-exporter/package.nix
new file mode 100644
index 000000000000..b15a356c6e37
--- /dev/null
+++ b/pkgs/by-name/pr/prometheus-mailman3-exporter/package.nix
@@ -0,0 +1,63 @@
+{
+  lib,
+  python3,
+  stdenv,
+  fetchFromGitHub,
+  fetchpatch2,
+}:
+
+let
+  python = python3.withPackages (
+    pp: with pp; [
+      certifi
+      charset-normalizer
+      idna
+      prometheus-client
+      requests
+      six
+      urllib3
+    ]
+  );
+in
+stdenv.mkDerivation rec {
+  pname = "mailman3-exporter";
+  version = "0.9.1";
+
+  src = fetchFromGitHub {
+    owner = "rivimey";
+    repo = "mailman3_exporter";
+    tag = version;
+    hash = "sha256-IupfZ3/MXBYpIyH8kJRc+WYabzSZyIu1WDITKTB5+Zc=";
+  };
+
+  patches = [
+    # https://github.com/rivimey/mailman3_exporter/pull/3
+    (fetchpatch2 {
+      url = "https://github.com/MarcelCoding/mailman3_exporter/commit/65070106451c6aafe8956387111343e490e34df8.patch?full_index=1";
+      hash = "sha256-2XM0ktLC4+7/PEgeToVR84Gfjx1UKxl/+jo6JGnVZMw=";
+    })
+    # https://github.com/rivimey/mailman3_exporter/pull/4
+    (fetchpatch2 {
+      url = "https://github.com/MarcelCoding/mailman3_exporter/commit/a7850a1e9ce65f91683eef67eb1c6537c2c2eb77.patch?full_index=1";
+      hash = "sha256-bBIin/7Y1bWrvxCuw1kJG8gaoKjkKdQnxfqpRipvyFs=";
+    })
+  ];
+
+  buildInputs = [
+    python
+  ];
+
+  installPhase = ''
+    install -D mailman_exporter.py $out/bin/mailman3_exporter
+  '';
+
+  meta = {
+    description = "Mailman3 Exporter for Prometheus";
+    homepage = "https://github.com/rivimey/mailman3_exporter";
+    # no license in repo
+    license = lib.licenses.unfree;
+    maintainers = with lib.maintainers; [ marcel ];
+    mainProgram = "mailman3_exporter";
+    platforms = lib.platforms.all;
+  };
+}

From d33d1dda8f50f1cf681ff8806bede4c9b5e8d599 Mon Sep 17 00:00:00 2001
From: Marcel <me@m4rc3l.de>
Date: Sat, 12 Apr 2025 03:42:54 +0200
Subject: [PATCH 2/2] nixos/prometheus-mailman3-exporter: init module

---
 .../monitoring/prometheus/exporters.nix       |  1 +
 .../prometheus/exporters/mailman3.nix         | 77 +++++++++++++++++++
 2 files changed, 78 insertions(+)
 create mode 100644 nixos/modules/services/monitoring/prometheus/exporters/mailman3.nix

diff --git a/nixos/modules/services/monitoring/prometheus/exporters.nix b/nixos/modules/services/monitoring/prometheus/exporters.nix
index 258d13e3c7c7..0e92249ccba8 100644
--- a/nixos/modules/services/monitoring/prometheus/exporters.nix
+++ b/nixos/modules/services/monitoring/prometheus/exporters.nix
@@ -85,6 +85,7 @@ let
         "libvirt"
         "lnd"
         "mail"
+        "mailman3"
         "mikrotik"
         "modemmanager"
         "mongodb"
diff --git a/nixos/modules/services/monitoring/prometheus/exporters/mailman3.nix b/nixos/modules/services/monitoring/prometheus/exporters/mailman3.nix
new file mode 100644
index 000000000000..cbfede2bb9e2
--- /dev/null
+++ b/nixos/modules/services/monitoring/prometheus/exporters/mailman3.nix
@@ -0,0 +1,77 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+  cfg = config.services.prometheus.exporters.mailman3;
+in
+{
+  port = 9934;
+  extraOpts = {
+    logLevel = lib.mkOption {
+      type = lib.types.enum [
+        "debug"
+        "info"
+        "warning"
+        "error"
+        "critical"
+      ];
+      default = "info";
+      description = ''
+        Detail level to log.
+      '';
+    };
+
+    mailman = {
+      addr = lib.mkOption {
+        type = lib.types.str;
+        default = "http://127.0.0.1:8001";
+        description = ''
+          Mailman3 Core REST API address.
+        '';
+      };
+
+      user = lib.mkOption {
+        type = lib.types.str;
+        default = "restadmin";
+        description = ''
+          Mailman3 Core REST API username.
+        '';
+      };
+
+      passFile = lib.mkOption {
+        type = lib.types.str;
+        default = config.services.mailman.restApiPassFile;
+        defaultText = lib.literalExpression "config.services.mailman.restApiPassFile";
+        description = ''
+          Mailman3 Core REST API password.
+        '';
+      };
+    };
+  };
+  serviceOpts = {
+    serviceConfig = {
+      LoadCredential = [
+        "password:${cfg.mailman.passFile}"
+      ];
+      ExecStart =
+        let
+          addr = "${
+            if (lib.hasInfix ":" cfg.listenAddress) then "[${cfg.listenAddress}]" else cfg.listenAddress
+          }:${toString cfg.port}";
+        in
+        ''
+          ${lib.getExe pkgs.prometheus-mailman3-exporter} \
+            --log-level ${cfg.logLevel} \
+            --web.listen ${addr} \
+            --mailman.address ${cfg.mailman.addr} \
+            --mailman.user ${cfg.mailman.user} \
+            --mailman.password-file %d/password \
+            ${lib.concatStringsSep " \\\n  " cfg.extraFlags}
+        '';
+    };
+  };
+}