Short-lived v2 changes

We are planning on deprecating this module and moving more of the
behavior back into npm/cli, because the split in responsibilities here
is still a bit off.

While working on the config handling refactor, some changes were floated
here, so the plan is to land them here in this module for posterity
before migrating it back into the cli's lib/utils/config folder, so that
it's just a migration instead of a fork-and-migrate.

lib/index.js

@@ -47,7 +47,6 @@ const envReplace = require('./env-replace.js')
 const parseField = require('./parse-field.js')
 const typeDescription = require('./type-description.js')
 const setEnvs = require('./set-envs.js')
-const getUserAgent = require('./get-user-agent.js')
 
 // types that can be saved back to
 const confFileTypes = new Set([
@@ -69,16 +68,19 @@ const _get = Symbol('get')
 const _find = Symbol('find')
 const _loadObject = Symbol('loadObject')
 const _loadFile = Symbol('loadFile')
+const _checkDeprecated = Symbol('checkDeprecated')
+const _flatten = Symbol('flatten')
+const _flatOptions = Symbol('flatOptions')
 
 class Config {
   static get typeDefs () {
     return typeDefs
   }
 
   constructor ({
-    types,
+    definitions,
     shorthands,
-    defaults,
+    flatten,
     npmPath,
 
     // options just to override in tests, mostly
@@ -89,10 +91,27 @@ class Config {
     execPath = process.execPath,
     cwd = process.cwd(),
   }) {
-    this.npmPath = npmPath
+
+    // turn the definitions into nopt's weirdo syntax
+    this.definitions = definitions
+    const types = {}
+    const defaults = {}
+    this.deprecated = {}
+    for (const [key, def] of Object.entries(definitions)) {
+      defaults[key] = def.default
+      types[key] = def.type
+      if (def.deprecated)
+        this.deprecated[key] = def.deprecated.trim().replace(/\n +/, '\n')
+    }
+
+    // populated the first time we flatten the object
+    this[_flatOptions] = null
+    this[_flatten] = flatten
     this.types = types
     this.shorthands = shorthands
     this.defaults = defaults
+
+    this.npmPath = npmPath
     this.log = log
     this.argv = argv
     this.env = env
@@ -183,10 +202,31 @@ class Config {
       if (!email)
         throw new Error('Cannot set _auth without first setting email')
     }
-    this.data.get(where).data[key] = val
+    this[_checkDeprecated](key)
+    const { data } = this.data.get(where)
+    data[key] = val
 
     // this is now dirty, the next call to this.valid will have to check it
     this.data.get(where)[_valid] = null
+
+    // the flat options are invalidated, regenerate next time they're needed
+    this[_flatOptions] = null
+  }
+
+  get flat () {
+    if (this[_flatOptions])
+      return this[_flatOptions]
+
+    // create the object for flat options passed to deps
+    process.emit('time', 'config:load:flatten')
+    this[_flatOptions] = {}
+    // walk from least priority to highest
+    for (const { data } of this.data.values()) {
+      this[_flatten](data, this[_flatOptions])
+    }
+    process.emit('timeEnd', 'config:load:flatten')
+
+    return this[_flatOptions]
   }
 
   delete (key, where = 'cli') {
@@ -233,11 +273,6 @@ class Config {
     await this.loadGlobalConfig()
     process.emit('timeEnd', 'config:load:global')
 
-    // now the extras
-    process.emit('time', 'config:load:cafile')
-    await this.loadCAFile()
-    process.emit('timeEnd', 'config:load:cafile')
-
     // warn if anything is not valid
     process.emit('time', 'config:load:validate')
     this.validate()
@@ -250,10 +285,6 @@ class Config {
     // set proper globalPrefix now that everything is loaded
     this.globalPrefix = this.get('prefix')
 
-    process.emit('time', 'config:load:setUserAgent')
-    this.setUserAgent()
-    process.emit('timeEnd', 'config:load:setUserAgent')
-
     process.emit('time', 'config:load:setEnvs')
     this.setEnvs()
     process.emit('timeEnd', 'config:load:setEnvs')
@@ -376,13 +407,13 @@ class Config {
     this.data.get(where)[_valid] = false
 
     if (Array.isArray(type)) {
-      if (type.indexOf(typeDefs.url.type) !== -1)
+      if (type.includes(typeDefs.url.type))
         type = typeDefs.url.type
       else {
         /* istanbul ignore if - no actual configs matching this, but
          * path types SHOULD be handled this way, like URLs, for the
          * same reason */
-        if (type.indexOf(typeDefs.path.type) !== -1)
+        if (type.includes(typeDefs.path.type))
           type = typeDefs.path.type
       }
     }
@@ -428,11 +459,21 @@ class Config {
       for (const [key, value] of Object.entries(obj)) {
         const k = envReplace(key, this.env)
         const v = this.parseField(value, k)
+        if (where !== 'default')
+          this[_checkDeprecated](k, where, obj, [key, value])
         conf.data[k] = v
       }
     }
   }
 
+  [_checkDeprecated] (key, where, obj, kv) {
+    // XXX a future npm version will make this a warning.
+    // An even more future npm version will make this an error.
+    if (this.deprecated[key]) {
+      this.log.verbose('config', key, this.deprecated[key])
+    }
+  }
+
   // Parse a field, coercing it to the best type available.
   parseField (f, key, listElement = false) {
     return parseField(f, key, this, listElement)
@@ -675,48 +716,6 @@ class Config {
     return creds
   }
 
-  async loadCAFile () {
-    const where = this[_find]('cafile')
-
-    /* istanbul ignore if - it'll always be set in the defaults */
-    if (!where)
-      return
-
-    const cafile = this[_get]('cafile', where)
-    const ca = this[_get]('ca', where)
-
-    // if you have a ca, or cafile is set to null, then nothing to do here.
-    if (ca || !cafile)
-      return
-
-    const raw = await readFile(cafile, 'utf8').catch(er => {
-      if (er.code !== 'ENOENT')
-        throw er
-    })
-    if (!raw)
-      return
-
-    const delim = '-----END CERTIFICATE-----'
-    const output = raw.replace(/\r\n/g, '\n').split(delim)
-      .filter(section => section.trim())
-      .map(section => section.trimLeft() + delim)
-
-    // make it non-enumerable so we don't save it back by accident
-    const { data } = this.data.get(where)
-    Object.defineProperty(data, 'ca', {
-      value: output,
-      enumerable: false,
-      configurable: true,
-      writable: true,
-    })
-  }
-
-  // the user-agent configuration is a template that gets populated
-  // with some variables, that takes place here
-  setUserAgent () {
-    this.set('user-agent', getUserAgent(this))
-  }
-
   // set up the environment object we have with npm_config_* environs
   // for all configs that are different from their default values, and
   // set EDITOR and HOME.

lib/set-envs.js

@@ -50,11 +50,13 @@ const setEnvs = (config) => {
     platform,
     env,
     defaults,
+    definitions,
     list: [cliConf, envConf],
   } = config
 
   env.INIT_CWD = process.cwd()
 
+  // if the key is deprecated, skip it always.
   // if the key is the default value,
   //   if the environ is NOT the default value,
   //     set the environ
@@ -65,6 +67,10 @@ const setEnvs = (config) => {
   const cliSet = new Set(Object.keys(cliConf))
   const envSet = new Set(Object.keys(envConf))
   for (const key in cliConf) {
+    const { deprecated } = definitions[key] || {}
+    if (deprecated)
+      continue
+
     if (sameConfigValue(defaults[key], cliConf[key])) {
       // config is the default, if the env thought different, then we
       // have to set it BACK to the default in the environment.