feat: auto import uniCloud once

packages/vue-cli-plugin-uni/lib/app-plus/index.js

@@ -63,8 +63,11 @@ const v3 = {
     const statCode = getPlatformStat()
     const pushCode = getPlatformPush()
 
-    const beforeCode = 'import \'uni-pages\';'
-
+    let beforeCode = 'import \'uni-pages\';'
+    if (JSON.parse(process.env.UNI_CLOUD_PROVIDER || '[]').length) {
+      const uniCloudLibPath = '@dcloudio/vue-cli-plugin-uni/packages/uni-cloud/dist/index.js'
+      beforeCode += `import '${uniCloudLibPath}';`
+    }
     if (!webpackConfig.optimization) {
       webpackConfig.optimization = {}
     }

packages/vue-cli-plugin-uni/lib/h5/index.js

@@ -100,9 +100,12 @@ module.exports = {
       useBuiltIns = babelConfig.presets[0][1].useBuiltIns
     } catch (e) {}
 
-    const beforeCode = (useBuiltIns === 'entry' ? 'import \'@babel/polyfill\';' : '') +
+    let beforeCode = (useBuiltIns === 'entry' ? 'import \'@babel/polyfill\';' : '') +
       `import 'uni-pages';import 'uni-${process.env.UNI_PLATFORM}';`
-
+    if (JSON.parse(process.env.UNI_CLOUD_PROVIDER || '[]').length) {
+      const uniCloudLibPath = '@dcloudio/vue-cli-plugin-uni/packages/uni-cloud/dist/index.js'
+      beforeCode += `import '${uniCloudLibPath}';`
+    }
     return {
       resolve: {
         extensions: ['.nvue'],

packages/vue-cli-plugin-uni/lib/mp/index.js

@@ -194,6 +194,11 @@ module.exports = {
 ${globalEnv}.__webpack_require_UNI_MP_PLUGIN__ = __webpack_require__;`
     }
 
+    if (JSON.parse(process.env.UNI_CLOUD_PROVIDER || '[]').length) {
+      const uniCloudLibPath = '@dcloudio/vue-cli-plugin-uni/packages/uni-cloud/dist/index.js'
+      beforeCode += `import '${uniCloudLibPath}';`
+    }
+
     const alias = { // 仅 mp-weixin
       'mpvue-page-factory': require.resolve(
         '@dcloudio/vue-cli-plugin-uni/packages/mpvue-page-factory')