Add stop, start, and restart commands

lua/lspconfig.lua

@@ -19,9 +19,46 @@ function M._root._setup()
       function()
         lspinfo()
       end;
-      "-nargs=?";
+      "-nargs=0";
       description = '`:LspInfo` Displays attached, active, and configured language servers';
     };
+    LspStart = {
+      function(server_name)
+        require('lspconfig')[server_name].autostart()
+      end;
+      "-nargs=1 -complete=custom,v:lua.lsp_complete_configured_servers";
+      description = '`:LspStart` Manually launches a language server.';
+    };
+    LspStop = {
+      function(client_id)
+        if not client_id then
+          vim.lsp.stop_client(vim.lsp.get_active_clients())
+        else
+          local client = vim.lsp.get_client_by_id(tonumber(client_id))
+          if client then
+            client.stop()
+          end
+        end
+      end;
+      "-nargs=? -complete=customlist,v:lua.lsp_get_active_client_ids";
+      description = '`:LspStop` Manually stops the given language client.';
+    };
+    LspRestart = {
+      function(client_id)
+        if client_id then
+          local client = vim.lsp.get_client_by_id(tonumber(client_id))
+          if client then
+            local client_name = client.name
+            client.stop()
+            vim.defer_fn(function()
+              require('lspconfig')[client_name].autostart()
+            end, 500)
+          end
+        end
+      end;
+      "-nargs=? -complete=customlist,v:lua.lsp_get_active_client_ids";
+      description = '`:LspRestart` Manually restart the given language client.';
+    };
   };
 
   M.util.create_module_commands("_root", M._root.commands)

plugin/lspconfig.vim

@@ -4,8 +4,15 @@ endif
 let g:lspconfig = 1
 
 lua << EOF
-lsp_complete_installable_servers = function()
+lsp_complete_configured_servers = function()
   return table.concat(require'lspconfig'.available_servers(), '\n')
 end
+lsp_get_active_client_ids = function()
+  client_ids = {}
+  for idx, client in ipairs(vim.lsp.get_active_clients()) do
+    table.insert(client_ids, tostring(client.id))
+  end
+  return client_ids
+end
 require'lspconfig'._root._setup()
 EOF