local M = {}

function M.textreg(s)
  return { lines = { tostring(s) }, type = 'v' }
end

function M.readonly(getter)
  return {
    read = function() return M.textreg(getter()) end,
    write = function() return false end,
    readonly = true,
  }
end

function M.path(path)
  return vim.fn.expand(path)
end

function M.shell_quote(s)
  return "'" .. s:gsub("'", "'\\''") .. "'"
end

function M.system(argv, input, label)
  local result = vim.system(argv, { text = false, stdin = input }):wait()
  if result.code ~= 0 then
    error((label or argv[1]) .. ': ' .. (result.stderr or ('exit status ' .. result.code)))
  end
  return result.stdout or ''
end

return M