Fix regressions from #2451

package.json

@@ -42,7 +42,7 @@
     "lint:markdown": "markdownlint --config ./.markdownlint.json *.md ./src/content/**/*.md --ignore './src/content/**/_*.md'",
     "lint:social": "alex . -q",
     "lint:prose": "cp .proselintrc ~/ && proselint src/content",
-    "lint:links": "hyperlink -r dist/index.html --canonicalroot https://webpack.js.org/ -i --todo https://img.shields.io | tee internal-links.tap | tap-spot",
+    "lint:links": "hyperlink -r dist/index.html --canonicalroot https://webpack.js.org/ -i --todo https://img.shields.io --todo 'content-type-mismatch https://travis-ci.org' | tee internal-links.tap | tap-spot",
     "linkcheck": "hyperlink -r dist/index.html --canonicalroot https://webpack.js.org/ --skip support__ --skip sidecar.gitter.im --skip vimdoc.sourceforge.net --skip img.shields.io --skip npmjs.com/package/ --skip opencollective.com/webpack --todo external-redirect | tee external-links.tap | tap-spot",
     "sitemap": "cd dist && sitemap-static --prefix=https://webpack.js.org/ > sitemap.xml",
     "serve": "npm run build && sirv start ./dist --port 4000",

src/utilities/process-readme.js

@@ -1,5 +1,7 @@
 const url = require('url');
 
+const beginsWithDocsDomainRegex = /^https?:\/\/webpack\.js\.org/;
+
 module.exports = function processREADME(body, options = {}) {
   return body
     .replace(/[^]*?<div align="center">([^]*?)<\/div>/, (match, content) => {
@@ -14,11 +16,27 @@ module.exports = function processREADME(body, options = {}) {
     // EXAMPLE: [Contributing](./.github/CONTRIBUTING.md)
     // EXAMPLE: [Contributing](CONTRIBUTING.md)
     .replace(/\[([^\]]*)\]\(([^)]+)\)/g, (markdownLink, content, href) => {
+      const oldHref = href;
+
       if (href.includes('//npmjs.com')) {
         href = href.replace('//www.npmjs.com');
       }
 
-      return `[${content}](${url.resolve(options.source, href)})`;
+      // Only resolve non-absolute urls from their source if they are not a document fragment link
+      if (!href.startsWith('#')) {
+        href = url.resolve(options.source, href);
+      }
+
+      // Modify absolute documenation links to be root relative
+      if (beginsWithDocsDomainRegex.test(href)) {
+        href = href.replace(beginsWithDocsDomainRegex, '');
+      }
+
+      if (oldHref !== href) {
+        console.log('REWRITE URL:', oldHref, '-->', href);
+      }
+
+      return `[${content}](${href})`;
     })
     // Modify links to keep them within the site
     .replace(/https?:\/\/github.com\/(webpack|webpack-contrib)\/([-A-za-z0-9]+-loader\/?)([)"])/g, '/loaders/$2/$3')