-- Minimal luash helper functions

-- Local environment variable storage
local env_vars = {}

-- Environment variable access
function env_get(name)
  -- Check local storage first, then system environment
  return env_vars[name] or os.getenv(name) or ""
end

function env_set(name, value)
  -- Store locally for this session
  env_vars[name] = tostring(value)
  -- Also try to set for subprocesses with proper quoting
  local quoted_value = "'" .. tostring(value):gsub("'", "'\"'\"'") .. "'"
  os.execute("export " .. name .. "=" .. quoted_value)
end

-- Shell command execution
function shell(command)
  local handle = io.popen(command, "r")
  if not handle then return "" end
  local output = handle:read("*a")
  handle:close()
  -- Remove trailing newlines
  return (output or ""):gsub("[\r\n]+$", "")
end

-- Interactive command execution (shows output directly)
function run(command)
  return os.execute(command)
end