ci: add script for publishing the wiki

It got lost somewhere between 6.0 and 6.1.

scripts/publish-docs.ts

@@ -0,0 +1,101 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+import { exec } from 'child_process';
+import * as fs from 'fs';
+import * as path from 'path';
+import { packages } from '../lib/packages';
+
+const temp = require('temp');
+
+function die(message = 'Unknown error.') {
+  throw new Error(message);
+}
+
+const version = packages['@angular/cli'].version || die('Cannot find @angular/cli.');
+
+const docsRoot = path.join(__dirname, '../docs/documentation');
+const outputPath = temp.mkdirSync('angular-cli-docs');
+
+// Execute a process and returns its stdout.
+function execute(command: string): Promise<string> {
+  return new Promise((resolve, reject) => {
+    exec(command, (error, stdout) => {
+      if (error) {
+        reject(error);
+      }
+
+      resolve(stdout.trim());
+    });
+  });
+}
+
+// List all files in a directory.
+function listAllFiles(directory: string) {
+  const list: string[] = [];
+
+  function _listRecurse(p: string) {
+    const files = fs.readdirSync(path.join(directory, p));
+    files.forEach(name => {
+      const fileName = path.join(p, name);
+      const stat = fs.statSync(path.join(directory, fileName));
+
+      if (stat.isDirectory()) {
+        _listRecurse(fileName);
+      } else {
+        list.push(fileName);
+      }
+    });
+  }
+  _listRecurse('');
+
+  return list;
+}
+
+
+export default async function() {
+  console.log(`Documentation Path: ${docsRoot}`);
+  console.log(`Wiki path: ${outputPath}`);
+
+  console.log('Cloning...');
+  await execute(`git clone "https://github.com/angular/angular-cli.wiki" "${outputPath}"`);
+
+  console.log('Listing all files...');
+  const allFiles = listAllFiles(docsRoot);
+  const allFilesInfo = allFiles.map(fileName => {
+    const wikiFileName = fileName.split(path.sep).join('-');
+    const src = path.join(docsRoot, fileName);
+    const dest = path.join(outputPath, wikiFileName);
+
+    return { fileName, wikiFileName, src, dest };
+  });
+
+  // For each files, read its content, replace all links from 'a/b/c.md' to 'a-b-c' and write it.
+  allFilesInfo.forEach(({ src, dest }) => {
+    let content = fs.readFileSync(src, 'utf-8');
+
+    content = allFilesInfo.reduce((acc, { fileName, wikiFileName }) => {
+      const replace = fileName.replace(/\.md$/, '');
+      const replaceWith = wikiFileName.replace(/\.md$/, '');
+
+      const text = replace.replace(/[\-\[\]{}()+?.^$|]/g, '\\$&');
+
+      return acc.replace(new RegExp(text, 'g'), replaceWith);
+    }, content);
+
+    fs.writeFileSync(dest, content);
+  });
+  console.log(`Done ${allFiles.length} files...`);
+
+  process.chdir(outputPath);
+  console.log('Committing...');
+  await execute('git add .');
+  await execute(`git commit -m "${version}"`);
+  await execute('git push');
+
+  console.log('Done');
+}