feat: add lint tool

lua/chatgpt_nvim/tools/lint.lua

@@ -0,0 +1,42 @@
+local uv = vim.loop
+
+local M = {}
+
+-- A naive lint approach: if a file ends with .lua, run "luacheck" if available.
+-- If .go, run "go build" or "go vet", etc. This is just an example; adapt to your needs.
+-- Return nil if lint tool can't be determined or is not installed.
+local function guess_linter_command(path)
+  if path:match("%.lua$") then
+    return "luacheck " .. vim.fn.shellescape(path)
+  elseif path:match("%.go$") then
+    -- We'll just do a quick "go build" or "go vet"
+    return "go vet " .. vim.fn.fnamemodify(path, ":h")
+  end
+  return nil
+end
+
+-- Executes the linter command and returns the output or an error if it fails to run.
+local function run_command(cmd)
+  local handle = io.popen(cmd)
+  if not handle then
+    return nil, ("Failed to run: %s"):format(cmd)
+  end
+  local output = handle:read("*a") or ""
+  handle:close()
+  return output, nil
+end
+
+function M.lint_file(path)
+  local lint_cmd = guess_linter_command(path)
+  if not lint_cmd then
+    return nil, "No known lint command for file: " .. path
+  end
+
+  local output, err = run_command(lint_cmd)
+  if not output then
+    return nil, err or ("Failed to lint: " .. path)
+  end
+  return output, nil
+end
+
+return M