copy-lsp-errors-from-file-neovim.lua

-- Function to collect all diagnostic errors and copy them to clipboard
local function copy_errors_to_clipboard()
  -- Get the current buffer number
  local current_buf = vim.api.nvim_get_current_buf()

  -- Get all diagnostics for the current buffer
  local diagnostics = vim.diagnostic.get(current_buf)

  -- Format each diagnostic into readable lines
  local lines = {}
  table.insert(lines, '# Errors from ' .. vim.fn.bufname(current_buf))
  table.insert(lines, '')

  if #diagnostics == 0 then
    table.insert(lines, 'No errors found.')
  else
    for i, diag in ipairs(diagnostics) do
      local severity = vim.diagnostic.severity[diag.severity] or 'UNKNOWN'
      local line_num = diag.lnum + 1 -- Convert to 1-based line numbering
      local col_num = diag.col + 1 -- Convert to 1-based column numbering
      local message = diag.message:gsub('\n', ' ') -- Replace any newlines in the message

      -- Format: [LINE:COL] [SEVERITY] Message
      table.insert(lines, string.format('[%d:%d] [%s] %s', line_num, col_num, severity, message))
    end
  end

  -- Join all lines with newline characters
  local error_text = table.concat(lines, '\n')

  -- Copy to clipboard
  vim.fn.setreg('+', error_text) -- Copy to system clipboard
  vim.fn.setreg('"', error_text) -- Copy to unnamed register

  -- Notify the user
  local count = #diagnostics
  local message = count .. ' error' .. (count == 1 and '' or 's') .. ' copied to clipboard'
  vim.notify(message, vim.log.levels.INFO)
end

-- Register the command
vim.api.nvim_create_user_command('CopyErrors', function()
  copy_errors_to_clipboard()
end, {})