Add feature to provide LSP diagnostics alongside code context

[isak102]

It would be nice to have an option to provide LSP diagnostics when using GpChatNew with some selected context. So if you select code which has a LSP error/warning etc then it would be included in the context in addition to the code. I am willing to work on this when I have time if this is a feature you are interested in merging

There exists https://github.com/piersolenski/wtf.nvim which does that but it does not let you have a persistent conversation like this plugin allows you to do, so I think this feature would be useful in this plugin

[qtnx]

Here’s my hook. You can paste it into your config or modify it to suit your needs. No need to wait for the plugin implementation, then use it by Gp[CustomHook]

FixErrorAtCursor = function(gp, params)
      local bufnr = vim.api.nvim_get_current_buf()
      local cursor_line, cursor_col = unpack(vim.api.nvim_win_get_cursor(0))
      cursor_line = cursor_line - 1 -- Convert to 0-based index

      local diagnostics = vim.diagnostic.get(bufnr)

      local cursor_diagnostic = nil
      for _, diagnostic in ipairs(diagnostics) do
        if diagnostic.lnum == cursor_line and diagnostic.col <= cursor_col and cursor_col <= diagnostic.end_col then
          cursor_diagnostic = diagnostic
          break
        end
      end

      if not cursor_diagnostic then
        print("No diagnostic found at cursor position")
        return
      end

      local error_message = string.format("Error at Line %d: %s [%s]. Source: %s\n",
        cursor_diagnostic.lnum + 1,
        cursor_diagnostic.message,
        cursor_diagnostic.code or "N/A",
        cursor_diagnostic.source or "N/A")

      -- Select the entire range of the error
      vim.api.nvim_win_set_cursor(0, { cursor_diagnostic.lnum + 1, cursor_diagnostic.col })
      vim.cmd('normal! v')
      vim.api.nvim_win_set_cursor(0, { cursor_diagnostic.end_lnum + 1, cursor_diagnostic.end_col })

      local selected_text = vim.fn.getline(cursor_diagnostic.lnum + 1, cursor_diagnostic.end_lnum + 1)
      local selection = table.concat(selected_text, '\n')

      local template = "Having following from {{filename}}:\n\n" ..
          "```lua\n" .. selection .. "\n```\n\n" ..
          "Error found at the cursor:\n" .. error_message ..
          "Please respond by fixing the error above." ..
          "\n\nRespond exclusively with the snippet that should replace the selection above."

      local agent = gp.get_command_agent()
      gp.logger.info("Fixing error at cursor with agent: " .. agent.name)

      gp.Prompt(
        params,
        gp.Target.rewrite,
        agent,
        template,
        nil, -- command will run directly without any prompting for user input
        nil  -- no predefined instructions
      )
    end,