feat: Convert script & styles to import statements (vuejs#184)

Use vue({ css: false }) to convert style blocks to import statements and then CSS plugin can handle it.

fixes vuejs#183, vuejs#153

Author: znck

.eslintrc.json

@@ -1,7 +1,8 @@
 {
   "env": {
     "browser": true,
-    "node": true
+    "node": true,
+    "jest": true
   },
   "globals": {
     "Promise": true

package.json

@@ -34,7 +34,7 @@
   "homepage": "https://github.com/znck/rollup-plugin-vue#readme",
   "dependencies": {
     "@babel/runtime": "^7.0.0-beta.39",
-    "@vue/component-compiler": "^3.1.0",
+    "@vue/component-compiler": "3.1.1",
     "@vue/component-compiler-utils": "^1.2.1",
     "debug": "^2.6.0",
     "hash-sum": "^1.0.2",

src/delegate.js

@@ -1,6 +1,167 @@
-import inline from './simple'
-import delegate from './delegate'
+import {
+  createVueFilter,
+  isVuePartRequest,
+  createVuePartRequest,
+  parseVuePartRequest,
+  resolveVuePart
+} from './utils'
+import * as path from 'path'
+import { parse } from '@vue/component-compiler-utils'
+import { createDefaultCompiler, assemble } from '@vue/component-compiler'
+import hash from 'hash-sum'
+import { relative } from 'path'
 
-inline.delegate = delegate
+export default function vue(opts = {}) {
+  const isVue = createVueFilter(opts.include, opts.exclude)
+  const isProduction = process.env.NODE_ENV === 'production'
+  createVuePartRequest.defaultLang = {
+    ...createVuePartRequest.defaultLang,
+    ...opts.defaultLang
+  }
 
-export default inline
+  const shouldExtractCss = opts.css === false
+  const blacklisted = new Set(opts.blacklistCustomBlocks || ['*'])
+  const whitelisted = new Set(opts.blacklistCustomBlocks || [])
+
+  const isAllowed = any =>
+    (!blacklisted.has('*') || !blacklisted.has(any)) &&
+    (whitelisted.has('*') || whitelisted.has(any))
+
+  delete opts.css
+  delete opts.blacklistCustomBlocks
+  delete opts.defaultLang
+  delete opts.include
+  delete opts.exclude
+
+  const compiler = createDefaultCompiler(opts)
+  const descriptors = new WeakMap()
+
+  return {
+    name: 'vue.delegate',
+
+    resolveId(id) {
+      if (isVuePartRequest(id)) {
+        const ref = parseVuePartRequest(id)
+        const element = resolveVuePart(descriptors, ref)
+
+        if (element.src && ref.meta.type !== 'styles')
+          return path.resolve(path.dirname(ref.filename), element.src)
+
+        return id
+      }
+    },
+
+    load(id) {
+      if (!isVuePartRequest(id)) return
+
+      id = parseVuePartRequest(id)
+      const element = resolveVuePart(descriptors, id)
+
+      return element.code || element.content
+    },
+
+    async transform(source, filename) {
+      if (isVue(filename)) {
+        const descriptor = (descriptors[filename] = parse({
+          filename,
+          source,
+          needMap: true
+        }))
+        const scopeId =
+          'data-v-' +
+          (isProduction
+            ? hash(path.basename(filename) + source)
+            : hash(filename + source))
+        const input = {
+          scopeId,
+          styles: descriptor.styles.map(style =>
+            compiler.compileStyle(filename, scopeId, style)
+          ),
+          customBlocks: []
+        }
+
+        if (descriptor.template) {
+          input.template = compiler.compileTemplate(
+            filename,
+            descriptor.template
+          )
+
+          if (input.template.errors && input.template.errors.length) {
+            console.error(
+              '> Errors: ' +
+                relative(process.cwd(), filename) +
+                '\n' +
+                input.template.errors.map(it => '  - ' + it).join('\n')
+            )
+          }
+
+          if (input.template.tips && input.template.tips.length) {
+            console.log(
+              '> Tips: ' +
+                relative(process.cwd(), filename) +
+                '\n' +
+                input.template.tips.map(it => '  - ' + it).join('\n')
+            )
+          }
+        }
+
+        input.script = descriptor.script
+          ? {
+              code: `
+            export * from '${createVuePartRequest(
+              filename,
+              descriptor.script.lang,
+              'script'
+            )}'
+            import script from '${createVuePartRequest(
+              filename,
+              descriptor.script.lang,
+              'script'
+            )}'
+            export default script
+            `
+            }
+          : { code: '' }
+
+        if (shouldExtractCss) {
+          input.styles = input.styles
+            .map((style, index) => {
+              descriptor.styles[index].code = style.code
+
+              input.script.code +=
+                '\n' +
+                `import '${createVuePartRequest(
+                  filename,
+                  'css',
+                  'styles',
+                  index
+                )}'`
+
+              if (style.module) {
+                return { ...style, code: '' }
+              }
+            })
+            .filter(Boolean)
+        }
+
+        const result = assemble(compiler, filename, input, opts)
+
+        descriptor.customBlocks.forEach((block, index) => {
+          if (!isAllowed(block.type)) return
+          result.code +=
+            '\n' +
+            `export * from '${createVuePartRequest(
+              filename,
+              block.attrs.lang ||
+                createVuePartRequest.defaultLang[block.type] ||
+                block.type,
+              'customBlocks',
+              index
+            )}'`
+        })
+
+        return result
+      }
+    }
+  }
+}