From 1caf8a7be15f4b658e25499207b8426fbc506000 Mon Sep 17 00:00:00 2001
From: hiyuki <674883329@qq.com>
Date: Wed, 10 Jan 2024 13:35:11 +0800
Subject: [PATCH] fix unocss web

---
 packages/unocss-plugin/lib/index.js                       | 1 +
 packages/unocss-plugin/lib/web-plugin/index.js            | 8 ++++----
 packages/unocss-plugin/lib/web-plugin/transform-loader.js | 2 ++
 packages/unocss-plugin/lib/web-plugin/utils.js            | 6 ++++++
 4 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/packages/unocss-plugin/lib/index.js b/packages/unocss-plugin/lib/index.js
index 7068217e93..591f913dc2 100644
--- a/packages/unocss-plugin/lib/index.js
+++ b/packages/unocss-plugin/lib/index.js
@@ -96,6 +96,7 @@ function normalizeOptions (options) {
     exclude: scan.exclude || [],
     transformers: [
       ...transformGroups ? [transformerVariantGroup()] : [],
+      // todo 由于enforce不为pre以及idFilter的存在，输出web时transformerDirectives暂时无法对.mpx中的样式文件生效，待优化改进
       ...transformCSS ? [transformerDirectives()] : []
     ],
     ...webOptions
diff --git a/packages/unocss-plugin/lib/web-plugin/index.js b/packages/unocss-plugin/lib/web-plugin/index.js
index e24ec60fc1..1725f3849e 100644
--- a/packages/unocss-plugin/lib/web-plugin/index.js
+++ b/packages/unocss-plugin/lib/web-plugin/index.js
@@ -13,7 +13,7 @@ function WebpackPlugin (configOrPath, defaults) {
   return {
     apply (compiler) {
       const ctx = createContext(configOrPath, defaults)
-      const { uno, filter } = ctx
+      const { uno, filter, transformCache } = ctx
       const entries = new Set()
       const __vfsModules = new Set()
       const __vfs = new VirtualModulesPlugin()
@@ -82,7 +82,8 @@ function WebpackPlugin (configOrPath, defaults) {
 
       compiler.hooks.compilation.tap(PLUGIN_NAME, (compilation) => {
         compilation.hooks.optimizeAssets.tapPromise(PLUGIN_NAME, async () => {
-          // 可以收集到cache中的tokens，可解决存在cache，二次serve中无法获取tokens的问题
+          // 清空transformCache避免watch修改不生效
+          transformCache.clear()
           const tokens = new Set()
           for (const module of compilation.modules) {
             const assetsInfo = module.buildInfo.assetsInfo || new Map()
@@ -94,9 +95,8 @@ function WebpackPlugin (configOrPath, defaults) {
               }
             }
           }
-          const files = Object.keys(compilation.assets)
           const result = await uno.generate(tokens, { minify: true })
-
+          const files = Object.keys(compilation.assets)
           for (const file of files) {
             if (file === '*') { return }
             let code = compilation.assets[file].source().toString()
diff --git a/packages/unocss-plugin/lib/web-plugin/transform-loader.js b/packages/unocss-plugin/lib/web-plugin/transform-loader.js
index 0f00878059..091d42ec62 100644
--- a/packages/unocss-plugin/lib/web-plugin/transform-loader.js
+++ b/packages/unocss-plugin/lib/web-plugin/transform-loader.js
@@ -5,9 +5,11 @@ async function transform (code, map) {
   const ctx = this._compiler.__unoCtx
   if (!ctx) return callback(null, code, map)
   await ctx.ready
+  // 使用resourcePath而不是resource作为id，规避query的影响
   const id = this.resourcePath
   const { extract, transformCache } = ctx
   let res
+  // 通过transformCache减少不必要的重复的transform/extract行为，如对于.mpx/.vue文件及其block request(template/style/script)进行重复transform/extract
   if (transformCache.has(id)) {
     res = transformCache.get(id)
   } else {
diff --git a/packages/unocss-plugin/lib/web-plugin/utils.js b/packages/unocss-plugin/lib/web-plugin/utils.js
index 3aaf50379f..06581bf37b 100644
--- a/packages/unocss-plugin/lib/web-plugin/utils.js
+++ b/packages/unocss-plugin/lib/web-plugin/utils.js
@@ -38,6 +38,12 @@ function createContext (configOrPath, defaults = {}, extraConfigSources = []) {
         presets.add(i.name)
       }
     })
+    const nonPreTransformers = uno.config.transformers?.filter((i) => i.enforce !== 'pre')
+    if (nonPreTransformers?.length) {
+      console.warn(
+        '[unocss] webpack integration only supports "pre" enforce transformers currently.the following transformers will be ignored\n' + nonPreTransformers.map((i) => ` - ${i.name}`).join('\n')
+      )
+    }
     return result
   }