fix(vue): fix postinstall error (#2684)

packages/vue/scripts/switch-cli.js

@@ -1,20 +1,18 @@
 const { switchVersion } = require('./utils.js')
-const {
-  switchVersion: switchVueDemiVersion,
-} = require('vue-demi/scripts/utils.js')
+const { exec } = require('child_process')
 
 const version = process.argv[2]
 const vueEntry = process.argv[3] || 'vue'
 
 if (version == '2') {
   switchVersion(2)
   console.log(`[formily-vue] Switched types for Vue 2`)
-  switchVueDemiVersion(2, vueEntry)
+  exec(`npx vue-demi-switch 2 ${vueEntry}`)
   console.log(`[vue-demi] Switched for Vue 2 (entry: "${vueEntry}")`)
 } else if (version == '3') {
   switchVersion(3)
   console.log(`[formily-vue] Switched types for Vue 3`)
-  switchVueDemiVersion(3, vueEntry)
+  exec(`npx vue-demi-switch 3 ${vueEntry}`)
   console.log(`[vue-demi] Switched for Vue 3 (entry: "${vueEntry}")`)
 } else {
   console.warn(

packages/vue/scripts/utils.js

@@ -1,4 +1,3 @@
-const { loadModule } = require('vue-demi/scripts/utils.js')
 const fs = require('fs-extra')
 const path = require('path')
 
@@ -9,5 +8,13 @@ function switchVersion(version) {
   fs.copySync(`${dir}/v${version}`, `${dir}/cur`)
 }
 
+function loadModule(name) {
+  try {
+    return require(name)
+  } catch (e) {
+    return undefined
+  }
+}
+
 module.exports.loadModule = loadModule
 module.exports.switchVersion = switchVersion