Function getPattern

packages/vite/src/node/plugins/define.ts:107–114

(environment: Environment)

    readonly [Record<string, string>, RegExp | null, string]
  >()
  function getPattern(environment: Environment) {
    let pattern = patternsCache.get(environment)
    if (!pattern) {
      pattern = generatePattern(environment)
      patternsCache.set(environment, pattern)
    }
    return pattern
  }

  return {
    name: 'vite:define',