feat(rust-analyzer): out-of-the-box support for codelens #4165

Codelens requires a bit of special configuration to work on rust-analyzer as described here:
neovim/neovim#34353 (comment)

1 files changed, 25 insertions, 0 deletions

diff --git a/lsp/rust_analyzer.lua b/lsp/rust_analyzer.lua
index a699c7f4..efac25a6 100644
--- a/lsp/rust_analyzer.lua
+++ b/lsp/rust_analyzer.lua
@@ -105,6 +105,13 @@ return {
   capabilities = {
     experimental = {
       serverStatusNotification = true,
+      commands = {
+        commands = {
+          'rust-analyzer.showReferences',
+          'rust-analyzer.runSingle',
+          'rust-analyzer.debugSingle',
+        },
+      },
     },
   },
   before_init = function(init_params, config)
@@ -112,6 +119,24 @@ return {
     if config.settings and config.settings['rust-analyzer'] then
       init_params.initializationOptions = config.settings['rust-analyzer']
     end
+    ---@param command table{ title: string, command: string, arguments: any[] }
+    vim.lsp.commands['rust-analyzer.runSingle'] = function(command)
+      local r = command.arguments[1]
+      local cmd = { 'cargo', unpack(r.args.cargoArgs) }
+      if r.args.executableArgs and #r.args.executableArgs > 0 then
+        vim.list_extend(cmd, { '--', unpack(r.args.executableArgs) })
+      end
+
+      local proc = vim.system(cmd, { cwd = r.args.cwd })
+
+      local result = proc:wait()
+
+      if result.code == 0 then
+        vim.notify(result.stdout, vim.log.levels.INFO)
+      else
+        vim.notify(result.stderr, vim.log.levels.ERROR)
+      end
+    end
   end,
   on_attach = function(_, bufnr)
     vim.api.nvim_buf_create_user_command(bufnr, 'LspCargoReload', function()