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1// Set environment variables for any non-default configs,2// so that they're already there when we run lifecycle scripts.3//4// See https://github.com/npm/rfcs/pull/905 6// Return the env key if this is a thing that belongs in the env.7// Ie, if the key isn't a @scope, //nerf.dart, or _private,8// and the value is a string or array.  Otherwise return false.9const envKey = (key, val) => {10  return !/^[/@_]/.test(key) &&11    (typeof envVal(val) === 'string') &&12      `npm_config_${key.replace(/-/g, '_').toLowerCase()}`13}14 15const envVal = val => Array.isArray(val) ? val.map(v => envVal(v)).join('\n\n')16  : val === null || val === undefined || val === false ? ''17  : typeof val === 'object' ? null18  : String(val)19 20const sameConfigValue = (def, val) =>21  !Array.isArray(val) || !Array.isArray(def) ? def === val22  : sameArrayValue(def, val)23 24const sameArrayValue = (def, val) => {25  if (def.length !== val.length) {26    return false27  }28 29  for (let i = 0; i < def.length; i++) {30    /* istanbul ignore next - there are no array configs where the default31     * is not an empty array, so this loop is a no-op, but it's the correct32     * thing to do if we ever DO add a config like that. */33    if (def[i] !== val[i]) {34      return false35    }36  }37  return true38}39 40const setEnv = (env, rawKey, rawVal) => {41  const val = envVal(rawVal)42  const key = envKey(rawKey, val)43  if (key && val !== null) {44    env[key] = val45  }46}47 48const setEnvs = (config) => {49  // This ensures that all npm config values that are not the defaults are50  // shared appropriately with child processes, without false positives.51  const {52    env,53    defaults,54    definitions,55    list: [cliConf, envConf],56  } = config57 58  env.INIT_CWD = process.cwd()59 60  // if the key is deprecated, skip it always.61  // if the key is the default value,62  //   if the environ is NOT the default value,63  //     set the environ64  //   else skip it, it's fine65  // if the key is NOT the default value,66  //   if the env is setting it, then leave it (already set)67  //   otherwise, set the env68  const cliSet = new Set(Object.keys(cliConf))69  const envSet = new Set(Object.keys(envConf))70  for (const key in cliConf) {71    const { deprecated, envExport = true } = definitions[key] || {}72    if (deprecated || envExport === false) {73      continue74    }75 76    if (sameConfigValue(defaults[key], cliConf[key])) {77      // config is the default, if the env thought different, then we78      // have to set it BACK to the default in the environment.79      if (!sameConfigValue(envConf[key], cliConf[key])) {80        setEnv(env, key, cliConf[key])81      }82    } else {83      // config is not the default.  if the env wasn't the one to set84      // it that way, then we have to put it in the env85      if (!(envSet.has(key) && !cliSet.has(key))) {86        setEnv(env, key, cliConf[key])87      }88    }89  }90 91  // also set some other common nice envs that we want to rely on92  env.HOME = config.home93  // TODO this may not be the best away to persist these94  env.npm_config_global_prefix = config.globalPrefix95  env.npm_config_local_prefix = config.localPrefix96  if (cliConf.editor) {97    env.EDITOR = cliConf.editor98  }99 100  // note: this doesn't affect the *current* node process, of course, since101  // it's already started, but it does affect the options passed to scripts.102  if (cliConf['node-options']) {103    env.NODE_OPTIONS = cliConf['node-options']104  }105  // the node-gyp bin uses this so we always set it106  env.npm_config_node_gyp = cliConf['node-gyp']107  // this doesn't have a full definition so we manually export it here108  env.npm_config_npm_version = cliConf['npm-version'] || 'unknown'109  env.npm_execpath = config.npmBin110  env.NODE = env.npm_node_execpath = config.execPath111}112 113module.exports = setEnvs114