feat($core): support Vue SFC as source files

packages/@vuepress/core/lib/internal-plugins/frontmatterBlock/index.js

@@ -0,0 +1,12 @@
+module.exports = () => ({
+  name: '@vuepress/internal-frontmatter-block',
+
+  chainWebpack (config) {
+    config
+      .module
+        .rule('frontmatter-block')
+          .resourceQuery(/blockType=frontmatter/)
+          .use('frontmatter-block-loader')
+            .loader(require.resolve('./loader.js'))
+  }
+})

packages/@vuepress/core/lib/internal-plugins/frontmatterBlock/loader.js

@@ -0,0 +1,29 @@
+const { parseVueFrontmatter: { parseStrippedFrontmatter }} = require('@vuepress/shared-utils')
+const { frontmatterEmitter } = require('@vuepress/markdown-loader')
+const LRU = require('lru-cache')
+const cache = LRU({ max: 1000 })
+
+module.exports = function (source, map) {
+  const isProd = process.env.NODE_ENV === 'production'
+
+  if (!isProd) {
+    const file = this.resourcePath
+    // frontmatter changed... need to do a full reload
+    const cached = cache.get(file)
+    const parsed = parseStrippedFrontmatter(source)
+
+    if (cached &&
+      cached.data &&
+      parsed &&
+      parsed.data &&
+      JSON.stringify(cached.data) !== JSON.stringify(parsed.data)
+    ) {
+      // TODO Replace temporary files in bulk to avoid repeated refreshes.
+      frontmatterEmitter.emit('update')
+    }
+
+    cache.set(file, parsed)
+  }
+
+  this.callback(null, '', map)
+}

packages/@vuepress/core/lib/prepare/AppContext.js

@@ -126,6 +126,7 @@ module.exports = class AppContext {
       .use(require('../internal-plugins/pageComponents'))
       .use(require('../internal-plugins/transformModule'))
       .use(require('../internal-plugins/dataBlock'))
+      .use(require('../internal-plugins/frontmatterBlock'))
       .use('@vuepress/last-updated', !!shouldUseLastUpdated)
       .use('@vuepress/register-components', {
         componentsDir: [
@@ -244,7 +245,7 @@ module.exports = class AppContext {
 
   async resolvePages () {
     // resolve pageFiles
-    const patterns = ['**/*.md', '!.vuepress', '!node_modules']
+    const patterns = ['**/*.md', '**/*.vue', '!.vuepress', '!node_modules']
     if (this.siteConfig.dest) {
       // #654 exclude dest folder when dest dir was set in
       // sourceDir but not in '.vuepress'

packages/@vuepress/core/lib/prepare/Page.js

@@ -16,7 +16,8 @@ const {
   fileToPath,
   getPermalink,
   extractHeaders,
-  parseFrontmatter
+  parseFrontmatter,
+  parseVueFrontmatter
 } = require('@vuepress/shared-utils')
 
 /**
@@ -95,29 +96,34 @@ module.exports = class Page {
     }
 
     if (this._content) {
-      const { excerpt, data, content } = parseFrontmatter(this._content)
-      this._strippedContent = content
-      this.frontmatter = data
-
-      // infer title
-      const title = inferTitle(this.frontmatter, this._strippedContent)
-      if (title) {
-        this.title = title
-      }
-
-      // headers
-      const headers = extractHeaders(
-        this._strippedContent,
-        ['h2', 'h3'],
-        markdown
-      )
-      if (headers.length) {
-        this.headers = headers
-      }
-
-      if (excerpt) {
-        const { html } = markdown.render(excerpt)
-        this.excerpt = html
+      if (this._filePath.endsWith('.md')) {
+        const { excerpt, data, content } = parseFrontmatter(this._content)
+        this._strippedContent = content
+        this.frontmatter = data
+
+        // infer title
+        const title = inferTitle(this.frontmatter, this._strippedContent)
+        if (title) {
+          this.title = title
+        }
+
+        // headers
+        const headers = extractHeaders(
+          this._strippedContent,
+          ['h2', 'h3'],
+          markdown
+        )
+        if (headers.length) {
+          this.headers = headers
+        }
+
+        if (excerpt) {
+          const { html } = markdown.render(excerpt)
+          this.excerpt = html
+        }
+      } else if (this._filePath.endsWith('.vue')) {
+        const { data = {}} = parseVueFrontmatter(this._content)
+        this.frontmatter = data
       }
     }
 

packages/@vuepress/shared-utils/__tests__/isIndexFile.spec.js

@@ -7,15 +7,25 @@ test('isIndexFile', () => {
     'INDEX.md',
     'index.md',
     'foo/README.md',
-    'foo/index.md'
+    'foo/index.md',
+    'README.vue',
+    'readme.vue',
+    'INDEX.vue',
+    'index.vue',
+    'foo/README.vue',
+    'foo/index.vue'
   ].forEach(file => {
     expect(isIndexFile(file)).toBe(true)
   });
   [
     'foo/one.md',
     'one.md',
     'one-index.md',
-    'foo/one-index.md'
+    'foo/one-index.md',
+    'foo/one.vue',
+    'one.vue',
+    'one-index.vue',
+    'foo/one-index.vue'
   ].forEach(file => {
     expect(isIndexFile(file)).toBe(false)
   })

packages/@vuepress/shared-utils/index.js

@@ -4,6 +4,7 @@ exports.codegen = require('./lib/codegen')
 exports.compose = require('./lib/compose')
 exports.datatypes = require('./lib/datatypes')
 exports.parseFrontmatter = require('./lib/parseFrontmatter')
+exports.parseVueFrontmatter = require('./lib/parseVueFrontmatter')
 
 exports.unescapeHtml = require('./lib/unescapeHtml')
 exports.escapeHtml = require('escape-html')

packages/@vuepress/shared-utils/lib/fileToPath.js

@@ -6,11 +6,15 @@ const extRE = /\.(vue|md)$/
 module.exports = function fileToPath (file) {
   if (isIndexFile(file)) {
     // README.md -> /
+    // README.vue -> /
     // foo/README.md -> /foo/
+    // foo/README.vue -> /foo/
     return file.replace(indexRE, '/$1')
   } else {
     // foo.md -> /foo.html
+    // foo.vue -> /foo.html
     // foo/bar.md -> /foo/bar.html
+    // foo/bar.vue -> /foo/bar.html
     return `/${file.replace(extRE, '').replace(/\\/g, '/')}.html`
   }
 }

packages/@vuepress/shared-utils/lib/isIndexFile.js

@@ -1,4 +1,4 @@
-const indexRE = /(^|.*\/)(index|readme)\.md$/i
+const indexRE = /(^|.*\/)(index|readme)\.(md|vue)$/i
 
 function isIndexFile (file) {
   return indexRE.test(file)

packages/@vuepress/shared-utils/lib/parseVueFrontmatter.js

@@ -0,0 +1,24 @@
+const compiler = require('vue-template-compiler')
+const { parse } = require('@vue/component-compiler-utils')
+const parseFrontmatter = require('./parseFrontmatter')
+
+function parseStrippedFrontmatter (src) {
+  src = `---\n${src}\n---`
+  return parseFrontmatter(src)
+}
+
+module.exports = src => {
+  const output = parse({
+    source: src,
+    compiler,
+    needMap: false
+  })
+  const find = output.customBlocks.find(block => block.type === 'frontmatter')
+  const frontmatterRaw = find && find.content
+  if (frontmatterRaw) {
+    return parseStrippedFrontmatter(frontmatterRaw)
+  }
+  return {}
+}
+
+module.exports.parseStrippedFrontmatter = parseStrippedFrontmatter