feat: respect existing package.json

packages/@vue/cli-service/lib/Service.js

@@ -1,14 +1,13 @@
 const fs = require('fs')
 const path = require('path')
 const debug = require('debug')
-const readPkg = require('read-pkg')
 const merge = require('webpack-merge')
 const Config = require('webpack-chain')
 const PluginAPI = require('./PluginAPI')
 const dotenv = require('dotenv')
 const dotenvExpand = require('dotenv-expand')
 const defaultsDeep = require('lodash.defaultsdeep')
-const { chalk, warn, error, isPlugin, resolvePluginId, loadModule } = require('@vue/cli-shared-utils')
+const { chalk, warn, error, isPlugin, resolvePluginId, loadModule, resolvePkg } = require('@vue/cli-shared-utils')
 
 const { defaults, validate } = require('./options')
 
@@ -44,16 +43,13 @@ module.exports = class Service {
   resolvePkg (inlinePkg, context = this.context) {
     if (inlinePkg) {
       return inlinePkg
-    } else if (fs.existsSync(path.join(context, 'package.json'))) {
-      const pkg = readPkg.sync({ cwd: context })
-      if (pkg.vuePlugins && pkg.vuePlugins.resolveFrom) {
-        this.pkgContext = path.resolve(context, pkg.vuePlugins.resolveFrom)
-        return this.resolvePkg(null, this.pkgContext)
-      }
-      return pkg
-    } else {
-      return {}
     }
+    const pkg = resolvePkg(context)
+    if (pkg.vuePlugins && pkg.vuePlugins.resolveFrom) {
+      this.pkgContext = path.resolve(context, pkg.vuePlugins.resolveFrom)
+      return this.resolvePkg(null, this.pkgContext)
+    }
+    return pkg
   }
 
   init (mode = process.env.VUE_CLI_MODE) {

packages/@vue/cli-service/package.json

@@ -63,7 +63,6 @@
     "minimist": "^1.2.0",
     "portfinder": "^1.0.25",
     "postcss-loader": "^3.0.0",
-    "read-pkg": "^5.1.1",
     "ssri": "^7.1.0",
     "terser-webpack-plugin": "^2.2.1",
     "thread-loader": "^2.1.3",

packages/@vue/cli-shared-utils/index.js

@@ -6,6 +6,7 @@
   'module',
   'object',
   'openBrowser',
+  'pkg',
   'pluginResolution',
   'launch',
   'request',

packages/@vue/cli-shared-utils/lib/pkg.js

@@ -0,0 +1,10 @@
+const fs = require('fs')
+const path = require('path')
+const readPkg = require('read-pkg')
+
+exports.resolvePkg = function (context) {
+  if (fs.existsSync(path.join(context, 'package.json'))) {
+    return readPkg.sync({ cwd: context })
+  }
+  return {}
+}

packages/@vue/cli-shared-utils/package.json

@@ -28,6 +28,7 @@
     "node-ipc": "^9.1.1",
     "open": "^6.3.0",
     "ora": "^3.4.0",
+    "read-pkg": "^5.1.1",
     "request": "^2.87.0",
     "request-promise-native": "^1.0.8",
     "semver": "^6.1.0",

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

@@ -14,6 +14,7 @@ const { formatFeatures } = require('./util/features')
 const loadLocalPreset = require('./util/loadLocalPreset')
 const loadRemotePreset = require('./util/loadRemotePreset')
 const generateReadme = require('./util/generateReadme')
+const { resolvePkg } = require('@vue/cli-shared-utils')
 
 const {
   defaults,
@@ -146,7 +147,8 @@ module.exports = class Creator extends EventEmitter {
       name,
       version: '0.1.0',
       private: true,
-      devDependencies: {}
+      devDependencies: {},
+      ...resolvePkg(context)
     }
     const deps = Object.keys(preset.plugins)
     deps.forEach(dep => {

yarn.lock

@@ -7045,7 +7045,7 @@ errorhandler@^1.5.1:
     accepts "~1.3.7"
     escape-html "~1.0.3"
 
-es-abstract@^1.12.0, es-abstract@^1.4.3, es-abstract@^1.5.1, es-abstract@^1.7.0:
+es-abstract@^1.12.0, es-abstract@^1.5.1, es-abstract@^1.7.0:
   version "1.16.2"
   resolved "https://registry.yarnpkg.com/es-abstract/-/es-abstract-1.16.2.tgz#4e874331645e9925edef141e74fc4bd144669d34"
   integrity sha512-jYo/J8XU2emLXl3OLwfwtuFfuF2w6DYPs+xy9ZfVyPkDcrauu6LYrw/q2TyCtrbc/KUdCiC5e9UajRhgNkVopA==
@@ -7257,7 +7257,7 @@ eslint-plugin-vue-libs@^4.0.0:
     babel-eslint "^10.0.1"
     eslint-plugin-vue "^5.1.0"
 
-eslint-plugin-vue@^5.1.0, eslint-plugin-vue@^5.2.2:
+eslint-plugin-vue@^5.0.0, eslint-plugin-vue@^5.1.0, eslint-plugin-vue@^5.2.2:
   version "5.2.3"
   resolved "https://registry.yarnpkg.com/eslint-plugin-vue/-/eslint-plugin-vue-5.2.3.tgz#3ee7597d823b5478804b2feba9863b1b74273961"
   integrity sha512-mGwMqbbJf0+VvpGR5Lllq0PMxvTdrZ/ZPjmhkacrCHbubJeJOt+T6E3HUzAifa2Mxi7RSdJfC9HFpOeSYVMMIw==
@@ -8277,7 +8277,7 @@ ftp@~0.3.10:
     readable-stream "1.1.x"
     xregexp "2.0.0"
 
-function-bind@^1.0.2, function-bind@^1.1.1:
+function-bind@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/function-bind/-/function-bind-1.1.1.tgz#a56899d3ea3c9bab874bb9773b7c5ede92f4895d"
   integrity sha512-yIovAzMX49sF8Yl58fSCWJ5svSLuaibPxXQJFLmBObTuCr0Mf1KiPopGM9NiFjiYBCbfaa2Fh6breQ6ANVTI0A==
@@ -14839,7 +14839,7 @@ request-promise@^4.2.4:
     stealthy-require "^1.1.1"
     tough-cookie "^2.3.3"
 
-request@2.88.0, request@^2.67.0, request@^2.83.0, request@^2.87.0, request@^2.88.0:
+request@2.88.0, request@^2.67.0, request@^2.87.0, request@^2.88.0:
   version "2.88.0"
   resolved "https://registry.yarnpkg.com/request/-/request-2.88.0.tgz#9c2fca4f7d35b592efe57c7f0a55e81052124fef"
   integrity sha512-NAqBSrijGLZdM0WZNsInLJpkJokL72XYjUpnB0iwsRgxh7dB6COrHnTBNwN0E+lHDAJzu7kLAkDeY08z2/A0hg==