refactor: extract rc file loading logic

packages/@vue/cli-ui/apollo-server/util/db.js

@@ -2,8 +2,7 @@ const Lowdb = require('lowdb')
 const FileSync = require('lowdb/adapters/FileSync')
 const fs = require('fs-extra')
 const path = require('path')
-const os = require('os')
-const { xdgConfigPath } = require('@vue/cli/lib/util/xdgConfig')
+const { getRcPath } = require('@vue/cli/lib/util/rcPath')
 
 let folder
 
@@ -14,9 +13,10 @@ if (process.env.VUE_CLI_UI_TEST) {
 } else if (process.env.VUE_APP_CLI_UI_DEV) {
   folder = '../../live'
 } else {
-  folder = process.env.VUE_CLI_UI_DB_PATH ||
-    xdgConfigPath('.vue-cli-ui') ||
-    path.join(os.homedir(), '.vue-cli-ui')
+  folder = (
+    process.env.VUE_CLI_UI_DB_PATH ||
+    getRcPath('.vue-cli-ui')
+  )
 }
 
 fs.ensureDirSync(path.resolve(__dirname, folder))

packages/@vue/cli/lib/options.js

@@ -1,17 +1,13 @@
 const fs = require('fs')
-const os = require('os')
-const path = require('path')
 const cloneDeep = require('lodash.clonedeep')
+const { getRcPath } = require('./util/rcPath')
+const { exit } = require('@vue/cli-shared-utils/lib/exit')
 const { error } = require('@vue/cli-shared-utils/lib/logger')
 const { createSchema, validate } = require('@vue/cli-shared-utils/lib/validate')
-const { exit } = require('@vue/cli-shared-utils/lib/exit')
-const { xdgConfigPath, windowsConfigPath } = require('./util/rcPath')
 
 const rcPath = exports.rcPath = (
   process.env.VUE_CLI_CONFIG_PATH ||
-  xdgConfigPath() ||
-  windowsConfigPath() ||
-  path.join(os.homedir(), '.vuerc')
+  getRcPath('.vuerc')
 )
 
 const presetSchema = createSchema(joi => joi.object().keys({

packages/@vue/cli/lib/util/rcPath.js

@@ -2,18 +2,18 @@ const fs = require('fs')
 const os = require('os')
 const path = require('path')
 
-exports.xdgConfigPath = () => {
+const xdgConfigPath = file => {
   const xdgConfigHome = process.env.XDG_CONFIG_HOME
   if (xdgConfigHome) {
     const rcDir = path.join(xdgConfigHome, 'vue')
     if (!fs.existsSync(rcDir)) {
       fs.mkdirSync(rcDir, 0o700)
     }
-    return path.join(rcDir, '.vuerc')
+    return path.join(rcDir, file)
   }
 }
 
-exports.windowsConfigPath = file => {
+const windowsConfigPath = file => {
   if (process.platform !== 'win32') {
     return
   }
@@ -23,15 +23,21 @@ exports.windowsConfigPath = file => {
     if (!fs.existsSync(rcDir)) {
       fs.mkdirSync(rcDir)
     }
-    const rcPath = path.join(rcDir, '.vuerc')
+    const rcPath = path.join(rcDir, file)
     // migration for < 3.0.0-rc.7
-    const oldRcFile = path.join(os.homedir(), '.vuerc')
+    const oldRcFile = path.join(os.homedir(), file)
     if (fs.existsSync(oldRcFile)) {
       fs.writeFileSync(rcPath, fs.readFileSync(oldRcFile))
       const chalk = require('chalk')
-      console.log(`Detected ${chalk.cyan(`.vuerc`)} in ${chalk.cyan(path.dirname(oldRcFile))}...`)
+      console.log(`Detected ${chalk.cyan(file)} in ${chalk.cyan(path.dirname(oldRcFile))}...`)
       console.log(`Migrated to ${chalk.cyan(rcPath)}.`)
     }
     return rcPath
   }
 }
+
+exports.getRcPath = file => (
+  xdgConfigPath(file) ||
+  windowsConfigPath(file) ||
+  path.join(os.homedir(), file)
+)