From 3cd71e08d014ffaa837b3a3d603c1eacee380504 Mon Sep 17 00:00:00 2001
From: Snoweuph <snow@euph.email>
Date: Tue, 12 May 2026 00:34:38 +0200
Subject: [PATCH] diagnostics/presets/cpplint: init

---
 docs/manual/release-notes/rl-0.9.md           |  2 ++
 .../plugins/diagnostics/presets/cpplint.nix   | 20 +++++++++++++
 .../plugins/diagnostics/presets/default.nix   |  1 +
 modules/plugins/languages/clang.nix           | 30 +++++++++++++++++++
 4 files changed, 53 insertions(+)
 create mode 100644 modules/plugins/diagnostics/presets/cpplint.nix

diff --git a/docs/manual/release-notes/rl-0.9.md b/docs/manual/release-notes/rl-0.9.md
index 10cc5425..4699d3bd 100644
--- a/docs/manual/release-notes/rl-0.9.md
+++ b/docs/manual/release-notes/rl-0.9.md
@@ -300,6 +300,8 @@
 - Moved extra diagnostic modules under `diagnostics.presets.<name>` this will
   allow for more flexibility in the future for nvf.
 
+- Added {option}`vim.diagnostics.presets.cpplint.enable`.
+
 - Added {option}`vim.treesitter.queries` to support adding custom queries.
 
 - Added injections for `query = '' ... ''` as `query` and `mkLualine '' ... ''`,
diff --git a/modules/plugins/diagnostics/presets/cpplint.nix b/modules/plugins/diagnostics/presets/cpplint.nix
new file mode 100644
index 00000000..153a53b7
--- /dev/null
+++ b/modules/plugins/diagnostics/presets/cpplint.nix
@@ -0,0 +1,20 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: let
+  inherit (lib.meta) getExe;
+  inherit (lib.modules) mkIf;
+  inherit (lib.nvim.types) mkDiagnosticsPresetEnableOption;
+
+  cfg = config.vim.diagnostics.presets.cpplint;
+in {
+  options.vim.diagnostics.presets.cpplint = {
+    enable = mkDiagnosticsPresetEnableOption "cpplint" "cpplint";
+  };
+
+  config = mkIf cfg.enable {
+    vim.diagnostics.nvim-lint.linters.cpplint.cmd = getExe pkgs.cpplint;
+  };
+}
diff --git a/modules/plugins/diagnostics/presets/default.nix b/modules/plugins/diagnostics/presets/default.nix
index 57c70e8c..cdb370e2 100644
--- a/modules/plugins/diagnostics/presets/default.nix
+++ b/modules/plugins/diagnostics/presets/default.nix
@@ -2,6 +2,7 @@
   imports = [
     ./biomejs.nix
     ./checkmake.nix
+    ./cpplint.nix
     ./deadnix.nix
     ./djlint.nix
     ./dotenv-linter.nix
diff --git a/modules/plugins/languages/clang.nix b/modules/plugins/languages/clang.nix
index 844074a5..57061c57 100644
--- a/modules/plugins/languages/clang.nix
+++ b/modules/plugins/languages/clang.nix
@@ -45,6 +45,8 @@
       '';
     };
   };
+  defaultDiagnosticsProvider = ["cpplint"];
+  diagnosticsProviders = ["cpplint"];
 in {
   options.vim.languages.clang = {
     enable = mkEnableOption "C/C++ language support";
@@ -102,6 +104,21 @@ in {
         default = debuggers.${cfg.dap.debugger}.package;
       };
     };
+
+    extraDiagnostics = {
+      enable =
+        mkEnableOption "extra C/C++ diagnostics"
+        // {
+          default = config.vim.languages.enableExtraDiagnostics;
+          defaultText = literalExpression "config.vim.languages.enableExtraDiagnostics";
+        };
+
+      types = mkOption {
+        type = listOf (enum diagnosticsProviders);
+        default = defaultDiagnosticsProvider;
+        description = "extra C/C++ diagnostics providers";
+      };
+    };
   };
 
   config = mkIf cfg.enable (mkMerge [
@@ -127,5 +144,18 @@ in {
       vim.debugger.nvim-dap.enable = true;
       vim.debugger.nvim-dap.sources.clang-debugger = debuggers.${cfg.dap.debugger}.dapConfig;
     })
+
+    (mkIf cfg.extraDiagnostics.enable {
+      vim.diagnostics = {
+        presets = genAttrs cfg.extraDiagnostics.types (_: {enable = true;});
+        nvim-lint = {
+          enable = true;
+          linters_by_ft = {
+            c = cfg.extraDiagnostics.types;
+            cpp = cfg.extraDiagnostics.types;
+          };
+        };
+      };
+    })
   ]);
 }