lsp/presets/ccls: init

modules/plugins/lsp/presets/ccls.nix

@@ -0,0 +1,54 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: let
+  inherit (lib.meta) getExe;
+  inherit (lib.modules) mkIf;
+  inherit (lib.options) mkEnableOption;
+  inherit (lib.generators) mkLuaInline;
+
+  cfg = config.vim.lsp.presets.ccls;
+in {
+  options.vim.lsp.presets.ccls = {
+    enable = mkEnableOption "the CC Language Server";
+  };
+
+  config = mkIf cfg.enable {
+    vim.lsp.servers.ccls = {
+      enable = true;
+      cmd = [(getExe pkgs.ccls)];
+      offset_encoding = "utf-32";
+      root_markers = [".git" ".ccls" "compile_commands.json"];
+      workspace_required = true;
+      on_attach = mkLuaInline ''
+        function(client, bufnr)
+          local function switch_source_header(bufnr)
+            local method_name = "textDocument/switchSourceHeader"
+            local params = vim.lsp.util.make_text_document_params(bufnr)
+            client:request(method_name, params, function(err, result)
+              if err then
+                error(tostring(err))
+              end
+              if not result then
+                vim.notify('corresponding file cannot be determined')
+                return
+              end
+              vim.cmd.edit(vim.uri_to_fname(result))
+            end, bufnr)
+          end
+
+          vim.api.nvim_buf_create_user_command(
+            bufnr,
+            "LspCclsSwitchSourceHeader",
+            function(arg)
+              switch_source_header(client, 0)
+            end,
+            {desc = "Switch between source/header"}
+          )
+        end
+      '';
+    };
+  };
+}