Snippet of destructuring clipboard in neovim Lua to find lines to populate the location list window.

init.lua

local function nmap(shortcut, command)
  keymap("n", shortcut, command)
end

nmap("<leader>P", ":PopulateQuickFixFromClipboard<CR>")
vim.api.nvim_create_user_command("PopulateQuickFixFromClipboard", function()
  -- Grab the contents of the system clipboard
  local clipboard_contents = vim.fn.system("pbpaste")
  local clipboard_lines = vim.split(clipboard_contents, "\n", { plain = true, trimempty = true })

  -- Define the possible formats for locations (adjust as needed)
  local location_patterns = {
    -- Rust cargo build output
    {
      pattern = ".* ([^: ]+):(%d+):(.*)",
      filename_group = 1,
      lnum_group = 2,
      description_group = "line_before",
    },
    -- File paths (relative or absolute)
    { pattern = "^([^ :]+):(%d+):(.*)", filename_group = 1, lnum_group = 2, description_group = 3 },
    -- Python stack trace lines
    {
      pattern = 'File (%b""), line (%d+), in (%w+)',
      filename_group = 1,
      lnum_group = 2,
      description_group = 3,
    },
  }
  -- Find all the locations that match any of the patterns, and record them in a table of tables.
  local locations = {}
  for _, line in ipairs(clipboard_lines) do
    for _, pattern_info in ipairs(location_patterns) do
      local p1, p2, p3 = line:match(pattern_info.pattern)
      if p1 then
        local captures = { p1, p2, p3 }
        local filename = captures[pattern_info.filename_group]:gsub('^"(.*)"$', "%1")
        if
          not string.find(filename, "site-packages", 1, true)
          and not string.find(filename, "Python.framework", 1, true)
          and not string.find(filename, "importlib", 1, true)
          and not string.find(filename, "/rustc/", 1, true)
        then
          if filename:sub(1, 5) == "/app/" then
            filename = filename:sub(6)
          end
          local lnum = tonumber(captures[pattern_info.lnum_group]) or 0
          local description = captures[pattern_info.description_group]
          table.insert(locations, {
            filename = filename,
            lnum = lnum,
            text = description,
          })
        end
      end
    end
  end

  if #locations > 0 then
    -- Populate the location list window
    vim.fn.setqflist({}, "r", { title = "Clipboard Locations", items = locations })
    vim.cmd("copen") -- Open the location list window
    vim.cmd.cfirst()
  else
    vim.notify("No locations found in clipboard.", vim.log.levels.INFO)
  end
end, {})