basant307/AI_Governance_Project

1const ENV_EXPR = /(?<!\\)(\\*)\$\{([^${}]+)\}/g2 3export function envReplace(settingValue: string, env: NodeJS.ProcessEnv): string {4  return settingValue.replace(ENV_EXPR, replaceEnvMatch.bind(null, env))5}6 7function replaceEnvMatch (env: NodeJS.ProcessEnv, orig: string, escape: string, name: string): string {8  if (escape.length % 2) {9    return orig.slice((escape.length + 1) / 2)10  }11  const envValue = getEnvValue(env, name)12  if (envValue === undefined) {13    throw new Error(`Failed to replace env in config: ${orig}`)14  }15  return `${(escape.slice(escape.length / 2))}${envValue}`16}17 18const ENV_VALUE = /([^:-]+)(:?)-(.+)/19 20function getEnvValue (env: NodeJS.ProcessEnv, name: string): string {21  const matched = name.match(ENV_VALUE)22  if (!matched) return env[name]23  const [, variableName, colon, fallback] = matched24  if (Object.prototype.hasOwnProperty.call(env, variableName)) {25    return !env[variableName] && colon ? fallback : env[variableName]26  }27  return fallback28}29