From 332b60f058466135ec04955a73c81b96bbc1d0cc Mon Sep 17 00:00:00 2001
From: emo-mruczek <krokcia1@gmail.com>
Date: Sat, 16 May 2026 19:09:54 +0200
Subject: [PATCH] languages/vhdl: init

---
 docs/manual/release-notes/rl-0.9.md     |  6 +++
 modules/plugins/languages/default.nix   |  1 +
 modules/plugins/languages/vhdl.nix      | 65 +++++++++++++++++++++++++
 modules/plugins/lsp/presets/default.nix |  1 +
 modules/plugins/lsp/presets/vhdl-ls.nix | 24 +++++++++
 5 files changed, 97 insertions(+)
 create mode 100644 modules/plugins/languages/vhdl.nix
 create mode 100644 modules/plugins/lsp/presets/vhdl-ls.nix

diff --git a/docs/manual/release-notes/rl-0.9.md b/docs/manual/release-notes/rl-0.9.md
index e18af42d..a36a19c0 100644
--- a/docs/manual/release-notes/rl-0.9.md
+++ b/docs/manual/release-notes/rl-0.9.md
@@ -495,6 +495,12 @@ https://github.com/gorbit99/codewindow.nvim
   [poseidon-rises](https://github.com/poseidon-rises) in
   [!1107](https://github.com/NotAShelf/nvf/pull/1107).
 
+[emo-mruczek](https://emo-mruczek.pet):
+
+[vhdl-ls]: https://github.com/VHDL-LS/rust_hdl
+
+- Add VHDL support with [vhdl-ls].
+
 [itscrystalline](https://github.com/itscrystalline):
 
 [img-clip.nvim]: https://github.com/hakonharnes/img-clip.nvim
diff --git a/modules/plugins/languages/default.nix b/modules/plugins/languages/default.nix
index abe89f41..1be4b25f 100644
--- a/modules/plugins/languages/default.nix
+++ b/modules/plugins/languages/default.nix
@@ -48,6 +48,7 @@ in {
     ./scala.nix
     ./sql.nix
     ./svelte.nix
+    ./vhdl.nix
     ./vue.nix
     ./terraform.nix
     ./toml.nix
diff --git a/modules/plugins/languages/vhdl.nix b/modules/plugins/languages/vhdl.nix
new file mode 100644
index 00000000..2db3e125
--- /dev/null
+++ b/modules/plugins/languages/vhdl.nix
@@ -0,0 +1,65 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}: let
+  inherit (builtins) attrNames;
+  inherit (lib.options) mkOption mkEnableOption literalExpression;
+  inherit (lib.modules) mkIf mkMerge;
+  inherit (lib.types) enum bool listOf;
+  inherit (lib) genAttrs;
+  inherit (lib.nvim.types) mkGrammarOption;
+  inherit (lib.nvim.attrsets) mapListToAttrs;
+
+  cfg = config.vim.languages.vhdl;
+
+  defaultServers = ["vhdl-ls"];
+  servers = ["vhdl-ls"];
+in {
+  options.vim.languages.vhdl = {
+    enable = mkEnableOption "VHDL language support";
+
+    treesitter = {
+      enable =
+        mkEnableOption "VHDL treesitter"
+        // {
+          default = config.vim.languages.enableTreesitter;
+          defaultText = literalExpression "config.vim.languages.enableTreesitter";
+        };
+      package = mkGrammarOption pkgs "vhdl";
+    };
+
+    lsp = {
+      enable =
+        mkEnableOption "VHDL LSP support"
+        // {
+          default = config.vim.lsp.enable;
+          defaultText = literalExpression "config.vim.lsp.enable";
+        };
+      servers = mkOption {
+        type = listOf (enum servers);
+        default = defaultServers;
+        description = "VHDL LSP server to use";
+      };
+    };
+  };
+
+  config = mkIf cfg.enable (mkMerge [
+    (mkIf cfg.treesitter.enable {
+      vim.treesitter = {
+        enable = true;
+        grammars = [cfg.treesitter.package];
+      };
+    })
+
+    (mkIf cfg.lsp.enable {
+      vim.lsp = {
+        presets = genAttrs cfg.lsp.servers (_: {enable = true;});
+        servers = genAttrs cfg.lsp.servers (_: {
+          filetypes = ["vhdl"];
+        });
+      };
+    })
+  ]);
+}
diff --git a/modules/plugins/lsp/presets/default.nix b/modules/plugins/lsp/presets/default.nix
index 58040ee7..d8bde108 100644
--- a/modules/plugins/lsp/presets/default.nix
+++ b/modules/plugins/lsp/presets/default.nix
@@ -72,6 +72,7 @@
     ./typescript-go.nix
     ./typescript-language-server.nix
     ./vala-language-server.nix
+    ./vhdl-ls.nix
     ./vscode-css-language-server.nix
     ./vscode-json-language-server.nix
     ./vtsls.nix
diff --git a/modules/plugins/lsp/presets/vhdl-ls.nix b/modules/plugins/lsp/presets/vhdl-ls.nix
new file mode 100644
index 00000000..f00c4578
--- /dev/null
+++ b/modules/plugins/lsp/presets/vhdl-ls.nix
@@ -0,0 +1,24 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: let
+  inherit (lib.meta) getExe;
+  inherit (lib.modules) mkIf;
+  inherit (lib.nvim.types) mkLspPresetEnableOption;
+
+  cfg = config.vim.lsp.presets.vhdl-ls;
+in {
+  options.vim.lsp.presets.vhdl-ls = {
+    enable = mkLspPresetEnableOption "vhdl-ls" "VHDL" [];
+  };
+
+  config = mkIf cfg.enable {
+    vim.lsp.servers.vhdl-ls = {
+      enable = true;
+      cmd = [(getExe pkgs.vhdl-ls)];
+      root_markers = [".git" "vhdl_ls.toml"];
+    };
+  };
+}