languages (clang): add ccls.nvim

.gitignore

@@ -1,2 +1,4 @@
 result
 .config
+lang-tests
+.ccls-cache

flake.nix

@@ -60,6 +60,10 @@
     plugin-rust-tools.url = "github:simrat39/rust-tools.nvim";
     plugin-rust-tools.flake = false;
 
+    # Not primary repo, waiting on PR
+    plugin-ccls-nvim.url = "github:MCGHH/ccls.nvim";
+    plugin-ccls-nvim.flake = false;
+
     # Debugger
     plugin-nvim-dap.url = "github:mfussenegger/nvim-dap";
     plugin-nvim-dap.flake = false;

modules/languages/clang.nix

@@ -65,6 +65,13 @@ in
         type = with types; nullOr str;
         default = null;
       };
+      cclsNvim = {
+        enable = mkOption {
+          description = "Enable support for extra ccls extensions through ccls.nvim";
+          default = cfg.lsp.server == "ccls";
+          defaultText = nvim.nmd.literalAsciiDoc ''`config.vim.languages.clang.lsp.server == "ccls"`'';
+        };
+      };
     };
   };
 
@@ -78,10 +85,24 @@ in
       vim.treesitter.grammars = [ cfg.treesitter.cPackage cfg.treesitter.cppPackage ];
     })
 
-    (mkIf cfg.lsp.enable {
-      vim.lsp.lspconfig.enable = true;
+    (mkIf cfg.lsp.enable (mkMerge [
+      {
+        vim.lsp.lspconfig.enable = true;
+        vim.lsp.lspconfig.sources.clang-lsp = servers.${cfg.lsp.server}.lspConfig;
+      }
 
-      vim.lsp.lspconfig.sources.clang-lsp = servers.${cfg.lsp.server}.lspConfig;
-    })
+      (mkIf cfg.lsp.cclsNvim.enable {
+        assertions = [{
+          assertion = cfg.lsp.server == "ccls";
+          message = "To enable cclsNvim, lsp must be enabled and set to ccls";
+        }];
+
+        vim.startPlugins = [ "ccls-nvim" ];
+
+        vim.luaConfigRC.ccls-nvim = nvim.dag.entryAnywhere ''
+          require("ccls").setup({})
+        '';
+      })
+    ]))
   ]);
 }