fix(preview): dont show preview for directories. Fixes #410

lua/trouble/util.lua

@@ -190,7 +190,7 @@ end
 
 --- Gets lines from a file or buffer
 ---@param opts {path?:string, buf?: number, rows?: number[]}
----@return table<number, string>
+---@return table<number, string>?
 function M.get_lines(opts)
   if opts.buf then
     local uri = vim.uri_from_bufnr(opts.buf)
@@ -216,9 +216,12 @@ function M.get_lines(opts)
 
   local fd = uv.fs_open(opts.path, "r", 438)
   if not fd then
-    return {}
+    return
   end
   local stat = assert(uv.fs_fstat(fd))
+  if not (stat.type == "file" or stat.type == "link") then
+    return
+  end
   local data = assert(uv.fs_read(fd, stat.size, 0)) --[[@as string]]
   assert(uv.fs_close(fd))
   local todo = opts.rows and #opts.rows or -1

lua/trouble/view/preview.lua

@@ -33,12 +33,19 @@ end
 function M.create(item)
   local buf = item.buf or vim.fn.bufnr(item.filename)
 
+  if item.filename and vim.fn.isdirectory(item.filename) then
+    return
+  end
+
   -- create a scratch preview buffer when needed
   if not (buf and vim.api.nvim_buf_is_loaded(buf)) then
     buf = vim.api.nvim_create_buf(false, true)
     vim.bo[buf].bufhidden = "wipe"
     vim.bo[buf].buftype = "nofile"
     local lines = Util.get_lines({ path = item.filename, buf = item.buf })
+    if not lines then
+      return
+    end
     vim.api.nvim_buf_set_lines(buf, 0, -1, false, lines)
     local ft = item:get_ft()
     if ft then
@@ -85,6 +92,9 @@ function M.open(view, item)
   end
 
   local buf = M.create(item)
+  if not buf then
+    return
+  end
 
   M.preview = M.preview_win(buf, view)