feat: H5模板新增常量 VUE_APP_INDEX_CSS_HASH

packages/uni-cli-shared/lib/platform.js

@@ -103,9 +103,7 @@ const PLATFORMS = {
     copyWebpackOptions ({
       assetsDir
     }) {
-      return [
-        ...getStaticCopyOptions(assetsDir),
-        {
+      const indexCssCopyOptions = [{
         from: require.resolve('@dcloudio/uni-h5/dist/index.css'),
         to: assetsDir,
         transform (content) {
@@ -114,7 +112,30 @@ const PLATFORMS = {
           }
           return content
         }
-        },
+      }]
+      const VUE_APP_INDEX_CSS_HASH = process.env.VUE_APP_INDEX_CSS_HASH
+      if (VUE_APP_INDEX_CSS_HASH) {
+        const {
+          getH5Options
+        } = require('./manifest')
+        const {
+          template
+        } = getH5Options()
+        const to = path.join(assetsDir, `[name].${VUE_APP_INDEX_CSS_HASH}.[ext]`)
+        if (process.env.NODE_ENV === 'production') {
+          const templateContent = fs.readFileSync(template, { encoding: 'utf8' })
+          if (/\bVUE_APP_INDEX_CSS_HASH\b/.test(templateContent)) {
+            indexCssCopyOptions[0].to = to
+          }
+        } else {
+          const indexCssCopyOption = Object.assign({}, indexCssCopyOptions[0])
+          indexCssCopyOption.to = to
+          indexCssCopyOptions.push(indexCssCopyOption)
+        }
+      }
+      return [
+        ...getStaticCopyOptions(assetsDir),
+        ...indexCssCopyOptions,
         ...getCopyOptions(['hybrid/html'])
       ]
     }

packages/vue-cli-plugin-uni/lib/env.js

 const fs = require('fs')
 const path = require('path')
 const mkdirp = require('mkdirp')
+const loaderUtils = require('loader-utils')
 
 // 初始化环境变量
 const defaultInputDir = '../../../../src'
@@ -109,6 +110,8 @@ if (process.env.UNI_PLATFORM === 'h5') {
       process.env.UNI_OPT_PRELOAD = true
     }
   }
+  const buffer = fs.readFileSync(require.resolve('@dcloudio/uni-h5/dist/index.css'))
+  process.env.VUE_APP_INDEX_CSS_HASH = loaderUtils.getHashDigest(buffer, 'md5', 'hex', 8)
 }
 
 if (process.env.UNI_PLATFORM === 'mp-qq') { // QQ小程序 强制自定义组件模式