wip: update sfc style var injection syntax

ref: https://github.com/vuejs/rfcs/pull/231#issuecomment-728993116

packages/compiler-sfc/__tests__/cssVars.spec.ts

@@ -2,52 +2,12 @@ import { compileStyle } from '../src'
 import { compileSFCScript, assertCode } from './utils'
 
 describe('CSS vars injection', () => {
-  describe('codegen', () => {
-    test('<script> w/ no default export', () => {
-      assertCode(
-        compileSFCScript(
-          `<script>const a = 1</script>\n` +
-            `<style>div{ color: var(--v-bind:color); }</style>`
-        ).content
-      )
-    })
-
-    test('<script> w/ default export', () => {
-      assertCode(
-        compileSFCScript(
-          `<script>export default { setup() {} }</script>\n` +
-            `<style>div{ color: var(--:color); }</style>`
-        ).content
-      )
-    })
-
-    test('<script> w/ default export in strings/comments', () => {
-      assertCode(
-        compileSFCScript(
-          `<script>
-          // export default {}
-          export default {}
-        </script>\n` + `<style>div{ color: var(--:color); }</style>`
-        ).content
-      )
-    })
-
-    test('w/ <script setup>', () => {
-      assertCode(
-        compileSFCScript(
-          `<script setup>const color = 'red'</script>\n` +
-            `<style>div{ color: var(--:color); }</style>`
-        ).content
-      )
-    })
-  })
-
   test('generating correct code for nested paths', () => {
     const { content } = compileSFCScript(
       `<script>const a = 1</script>\n` +
         `<style>div{
-          color: var(--v-bind:color);
+          color: v-bind(color);
-          color: var(--v-bind:font.size);
+          font-size: v-bind('font.size');
         }</style>`
     )
     expect(content).toMatch(`_useCssVars(_ctx => ({
@@ -71,9 +31,9 @@ describe('CSS vars injection', () => {
         </script>\n` +
         `<style>
           div {
-            color: var(--:color);
+            color: v-bind(color);
-            font-size: var(--:size);
+            font-size: v-bind(size);
-            border: var(--:foo);
+            border: v-bind(foo);
           }
         </style>`
     )
@@ -95,8 +55,8 @@ describe('CSS vars injection', () => {
   test('should rewrite CSS vars in scoped mode', () => {
     const { code } = compileStyle({
       source: `.foo {
-        color: var(--v-bind:color);
+        color: v-bind(color);
-        font-size: var(--:font.size);
+        font-size: v-bind('font.size');
       }`,
       filename: 'test.css',
       id: 'data-v-test'
@@ -108,4 +68,44 @@ describe('CSS vars injection', () => {
       }"
     `)
   })
+
+  describe('codegen', () => {
+    test('<script> w/ no default export', () => {
+      assertCode(
+        compileSFCScript(
+          `<script>const a = 1</script>\n` +
+            `<style>div{ color: v-bind(color); }</style>`
+        ).content
+      )
+    })
+
+    test('<script> w/ default export', () => {
+      assertCode(
+        compileSFCScript(
+          `<script>export default { setup() {} }</script>\n` +
+            `<style>div{ color: v-bind(color); }</style>`
+        ).content
+      )
+    })
+
+    test('<script> w/ default export in strings/comments', () => {
+      assertCode(
+        compileSFCScript(
+          `<script>
+          // export default {}
+          export default {}
+        </script>\n` + `<style>div{ color: v-bind(color); }</style>`
+        ).content
+      )
+    })
+
+    test('w/ <script setup>', () => {
+      assertCode(
+        compileSFCScript(
+          `<script setup>const color = 'red'</script>\n` +
+            `<style>div{ color: v-bind(color); }</style>`
+        ).content
+      )
+    })
+  })
 })

packages/compiler-sfc/src/cssVars.ts

@@ -13,7 +13,7 @@ import { ParserPlugin } from '@babel/parser'
 import postcss, { Root } from 'postcss'
 
 export const CSS_VARS_HELPER = `useCssVars`
-export const cssVarRE = /\bvar\(--(?:v-bind)?:([^)]+)\)/g
+export const cssVarRE = /\bv-bind\(\s*(?:'([^']+)'|"([^"]+)"|([^'"][^)]*))\s*\)/g
 
 export function convertCssVarCasing(raw: string): string {
   return raw.replace(/([^\w-])/g, '_')
@@ -24,7 +24,7 @@ export function parseCssVars(sfc: SFCDescriptor): string[] {
   sfc.styles.forEach(style => {
     let match
     while ((match = cssVarRE.exec(style.content))) {
-      vars.push(match[1])
+      vars.push(match[1] || match[2] || match[3])
     }
   })
   return vars
@@ -38,8 +38,8 @@ export const cssVarsPlugin = postcss.plugin(
     root.walkDecls(decl => {
       // rewrite CSS variables
       if (cssVarRE.test(decl.value)) {
-        decl.value = decl.value.replace(cssVarRE, (_, $1) => {
+        decl.value = decl.value.replace(cssVarRE, (_, $1, $2, $3) => {
-          return `var(--${shortId}-${convertCssVarCasing($1)})`
+          return `var(--${shortId}-${convertCssVarCasing($1 || $2 || $3)})`
         })
       }
     })