From 90ce7f508a8d2a40b64fb0430faf8f5ec9695277 Mon Sep 17 00:00:00 2001
From: Jeff Slight <jslight90@gmail.com>
Date: Wed, 13 May 2020 11:59:28 -0700
Subject: [PATCH] nixos/logrotate: add options for basic paths

---
 nixos/modules/services/logging/logrotate.nix | 73 ++++++++++++++++++--
 1 file changed, 69 insertions(+), 4 deletions(-)

diff --git a/nixos/modules/services/logging/logrotate.nix b/nixos/modules/services/logging/logrotate.nix
index 17eb1ddf6acde7..5b0af8e3349d26 100644
--- a/nixos/modules/services/logging/logrotate.nix
+++ b/nixos/modules/services/logging/logrotate.nix
@@ -5,21 +5,86 @@ with lib;
 let
   cfg = config.services.logrotate;
 
-  configFile = pkgs.writeText "logrotate.conf"
-    cfg.config;
+  pathOptions = {
+    options = {
+      path = mkOption {
+        type = types.str;
+        description = "The path to log files to be rotated";
+      };
+      user = mkOption {
+        type = types.str;
+        description = "The user account to use for rotation";
+      };
+      group = mkOption {
+        type = types.str;
+        description = "The group to use for rotation";
+      };
+      frequency = mkOption {
+        type = types.enum [
+          "daily" "weekly" "monthly" "yearly"
+        ];
+        default = "daily";
+        description = "How often to rotate the logs";
+      };
+      keep = mkOption {
+        type = types.int;
+        default = 20;
+        description = "How many rotations to keep";
+      };
+      extraConfig = mkOption {
+        type = types.lines;
+        default = "";
+        description = "Extra logrotate config options for this path";
+      };
+    };
+  };
+
+  pathConfig = options: ''
+    "${options.path}" {
+      su ${options.user} ${options.group}
+      ${options.frequency}
+      missingok
+      notifempty
+      rotate ${toString options.keep}
+      ${options.extraConfig}
+    }
+  '';
+
+  configFile = pkgs.writeText "logrotate.conf" (
+    (concatStringsSep "\n" (map pathConfig cfg.paths)) +
+    cfg.extraConfig
+  );
 
 in
 {
+  imports = [
+    (mkRenamedOptionModule [ "services" "logrotate" "config" ] [ "services" "logrotate" "extraConfig" ])
+  ];
+
   options = {
     services.logrotate = {
       enable = mkEnableOption "the logrotate systemd service";
+
+      paths = mkOption {
+        type = types.listOf (types.submodule pathOptions);
+        default = [];
+        description = "List of attribute sets with paths to rotate";
+        example = {
+          "/var/log/myapp/*.log" = {
+            user = "myuser";
+            group = "mygroup";
+            rotate = "weekly";
+            keep = 5;
+          };
+        };
       };
 
-      config = mkOption {
+      extraConfig = mkOption {
         default = "";
         type = types.lines;
         description = ''
-          The contents of the logrotate config file
+          Extra contents to add to the logrotate config file.
+          See https://linux.die.net/man/8/logrotate
         '';
       };
     };