website/script/do-redirects.js - druid - Git at Google

 /*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
  * regarding copyright ownership.  The ASF licenses this file
  * to you under the Apache License, Version 2.0 (the
  * "License"); you may not use this file except in compliance
  * with the License.  You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 if (process.argv.length !== 2) {
   console.error(`Incorrect number of arguments`);
   console.error(`Run as: node do-redirects.js <strict?>`);
   process.exit(1);
 }

 const fs = require('fs-extra');
 const path = require('path');

 const dst = './build/ApacheDruid/docs/';
 const strict = process.argv[2];

 function resolveTarget(source, target) {
   return path.resolve(path.dirname('/' + source), target).substr(1);
 }

 const redirects = fs.readFileSync('./redirects.json', 'utf-8')
   .trim()
   .split('\n')
   .map((line) => JSON.parse(line));

 const issues = [];
 const validRedirects = redirects.filter((redirect, i) => {
   const lineNumber = String(i + 1);
   let source = redirect.source;

   let valid = true;
   if (fs.pathExistsSync(dst + source)) {
     issues.push(`On line ${lineNumber} source ${source} already exists`);
     valid = false;
   }

   const targetParts = redirect.target.split('#');
   const cleanTarget = targetParts[0];
   const targetAnchor = targetParts[1];
   let resolvedTarget = resolveTarget(source, cleanTarget);
   if (!redirect.target.startsWith('/')) {
     let targetHtml;
     try {
       targetHtml = fs.readFileSync(dst + resolvedTarget, 'utf-8');
     } catch (e) {
       issues.push(`On line ${lineNumber} target ${resolvedTarget} does not exist`);
       valid = false;
     }

     if (targetHtml && targetAnchor) {
       if (!targetHtml.includes(`name="${targetAnchor}"`) && !targetHtml.includes(`id="${targetAnchor}"`)) {
         issues.push(`On line ${lineNumber} could not find anchor '${targetAnchor}' in '${resolvedTarget}'`)
         valid = false;
       }
     }
   }

   return valid
 });

 if (issues.length) {
   issues.push(`There are ${issues.length} issues with the redirects`);
   console.error(issues.join('\n'));
   if (strict) process.exit(1);
 }

 validRedirects.forEach((redirect) => {
   let source = redirect.source;
   let target = redirect.target;

   fs.ensureDirSync(path.dirname(dst + source));
   fs.writeFileSync(dst + source, `<!DOCTYPE html>
 <meta charset="utf-8">
 <title>Redirecting...</title>
 <link rel="canonical" href="${target}">
 <meta http-equiv="refresh" content="0; url=${target}">
 <h1>Redirecting...</h1>
 <a href="${target}">Click here if you are not redirected.</a>
 <script>location="${target}"</script>
 `
   );
 });

 console.log(`Written ${validRedirects.length} redirects`);
	/*
	* Licensed to the Apache Software Foundation (ASF) under one
	* or more contributor license agreements. See the NOTICE file
	* distributed with this work for additional information
	* regarding copyright ownership. The ASF licenses this file
	* to you under the Apache License, Version 2.0 (the
	* "License"); you may not use this file except in compliance
	* with the License. You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	if (process.argv.length !== 2) {
	console.error(`Incorrect number of arguments`);
	console.error(`Run as: node do-redirects.js <strict?>`);
	process.exit(1);
	}

	const fs = require('fs-extra');
	const path = require('path');

	const dst = './build/ApacheDruid/docs/';
	const strict = process.argv[2];

	function resolveTarget(source, target) {
	return path.resolve(path.dirname('/' + source), target).substr(1);
	}

	const redirects = fs.readFileSync('./redirects.json', 'utf-8')
	.trim()
	.split('\n')
	.map((line) => JSON.parse(line));

	const issues = [];
	const validRedirects = redirects.filter((redirect, i) => {
	const lineNumber = String(i + 1);
	let source = redirect.source;

	let valid = true;
	if (fs.pathExistsSync(dst + source)) {
	issues.push(`On line ${lineNumber} source ${source} already exists`);
	valid = false;
	}

	const targetParts = redirect.target.split('#');
	const cleanTarget = targetParts[0];
	const targetAnchor = targetParts[1];
	let resolvedTarget = resolveTarget(source, cleanTarget);
	if (!redirect.target.startsWith('/')) {
	let targetHtml;
	try {
	targetHtml = fs.readFileSync(dst + resolvedTarget, 'utf-8');
	} catch (e) {
	issues.push(`On line ${lineNumber} target ${resolvedTarget} does not exist`);
	valid = false;
	}

	if (targetHtml && targetAnchor) {
	if (!targetHtml.includes(`name="${targetAnchor}"`) && !targetHtml.includes(`id="${targetAnchor}"`)) {
	issues.push(`On line ${lineNumber} could not find anchor '${targetAnchor}' in '${resolvedTarget}'`)
	valid = false;
	}
	}
	}

	return valid
	});

	if (issues.length) {
	issues.push(`There are ${issues.length} issues with the redirects`);
	console.error(issues.join('\n'));
	if (strict) process.exit(1);
	}

	validRedirects.forEach((redirect) => {
	let source = redirect.source;
	let target = redirect.target;

	fs.ensureDirSync(path.dirname(dst + source));
	fs.writeFileSync(dst + source, `<!DOCTYPE html>
	<meta charset="utf-8">
	<title>Redirecting...</title>
	<link rel="canonical" href="${target}">
	<meta http-equiv="refresh" content="0; url=${target}">
	<h1>Redirecting...</h1>
	<a href="${target}">Click here if you are not redirected.</a>
	<script>location="${target}"</script>
	`
	);
	});

	console.log(`Written ${validRedirects.length} redirects`);