2020-07-09 18:53:51 +02:00

242 lines
9.8 KiB
JavaScript

const fs = require('fs');
const path = require('path');
const asciidoctor = require("asciidoctor")();
const stripHtml = require("string-strip-html");
const lunr = require('lunr');
const jsdom = require("jsdom");
const { JSDOM } = jsdom;
const RULE_SRC_DIRECTORY = path.join("..", "rules");
const RULE_DST_DIRECTORY = path.join("public", "rules");
function clean_rules() {
console.log("Deleting rules.");
fs.rmdirSync(RULE_DST_DIRECTORY, { recursive: true });
}
function generate_rules_metadata_and_description() {
const ruleIndexStore = {};
fs.mkdirSync(RULE_DST_DIRECTORY, { recursive: true });
fs.readdirSync(RULE_SRC_DIRECTORY).forEach(fileName => {
const ruleSrcDirectory = path.join(RULE_SRC_DIRECTORY, fileName);
const ruleDstDirectory = path.join(RULE_DST_DIRECTORY, fileName);
try {
generate_rule_metadata_and_description(ruleSrcDirectory, ruleDstDirectory, ruleIndexStore);
} catch (e) {
console.error("ERROR while generating " + fileName + ": " + e);
}
});
const ruleIndexJson = JSON.stringify(build_search_index(ruleIndexStore));
fs.writeFileSync(path.join(RULE_DST_DIRECTORY, "rule-index.json"), ruleIndexJson, {encoding: 'utf8'});
// Remove the descriptions as they are only interesting for indexing
for (const rule of Object.values(ruleIndexStore)) {
delete rule.descriptions;
}
const ruleIndexStoreJson = JSON.stringify(ruleIndexStore, null, 2);
fs.writeFileSync(path.join(RULE_DST_DIRECTORY, "rule-index-store.json"), ruleIndexStoreJson, {encoding: 'utf8'});
}
function generate_rule_metadata_and_description(/*string*/ruleSrcDirectory, /*string*/ruleDstDirectory, ruleIndexStore) {
const all_languages = findSupportedLanguage(ruleSrcDirectory);
// Search records will be indexed by lunr search engine
const ruleKey = parseInt(ruleSrcDirectory.split('/').pop().substring(1))
const searchRecord = {
id: ruleKey,
languages: all_languages,
type: null,
defaultSeverity: null,
titles: new Set(),
tags: new Set(),
qualityProfiles: new Set(),
descriptions: new Set(),
}
ruleIndexStore[ruleKey] = (searchRecord);
console.log("Converting '" + ruleSrcDirectory + "' into '" + ruleDstDirectory + "' for languages: " + all_languages.join(", "));
const allKeys = new Set();
const metadatas = new Map();
all_languages.forEach(language => {
fs.mkdirSync(ruleDstDirectory, { recursive: true });
const htmlDescription = generate_rule_description(ruleSrcDirectory, ruleDstDirectory, language);
const metadata = generate_rule_metadata(ruleSrcDirectory, ruleDstDirectory, language, all_languages);
metadatas.set(language, metadata);
// populate the search record
searchRecord.titles.add(metadata.title);
searchRecord.type = metadata.type;
searchRecord.defaultSeverity = metadata.defaultSeverity;
if (metadata.tags) {
for (const tag of metadata.tags.values()) {
searchRecord.tags.add(tag);
}
}
if (metadata.qualityProfiles) {
for (const qualityProfile of metadata.qualityProfiles.values()) {
searchRecord.qualityProfiles.add(qualityProfile);
}
}
allKeys.add(metadata.sqKey);
// Remove HTML tags from the description, extract unique words and normalize them.
// This reduces a bit the footprint of descriptions in the index.
const descriptionWords = stripHtml(htmlDescription).split(/[\s,.:;!?()"'-+*/\\%#]+/)
descriptionWords.forEach(item => searchRecord.descriptions.add(item.toUpperCase()));
});
for (const [language, metadata] of metadatas.entries()) {
// update each language metadata with aggregated metadatas (ex: legacy keys)
metadata['allKeys'] = Array.from(allKeys);
// write metadatas
const dstJsonFile = path.join(ruleDstDirectory, language + "-metadata.json");
fs.writeFileSync(dstJsonFile, JSON.stringify(metadata, null, 2), {encoding: 'utf8'});
}
// replace Set with lists so that it can be used with JSON.stringify
searchRecord.titles = Array.from(searchRecord.titles).join('\n');
searchRecord.descriptions = Array.from(searchRecord.descriptions).join(' ');
searchRecord.tags = Array.from(searchRecord.tags);
searchRecord.qualityProfiles = Array.from(searchRecord.qualityProfiles);
}
function generate_rule_description(ruleSrcDirectory, ruleDstDirectory, language) {
let ruleSrcFile = path.join(ruleSrcDirectory, language, "rule.adoc");
if (!fs.existsSync(ruleSrcFile)) {
ruleSrcFile = path.join(ruleSrcDirectory, "rule.adoc");
if (!fs.existsSync(ruleSrcFile)) {
throw new Error("Missing file 'rule.adoc' for language '" + language + " in " + ruleSrcDirectory);
}
}
const ruleDstFile = path.join(ruleDstDirectory, language + "-description.html");
const baseDir = path.resolve(path.dirname(ruleSrcFile));
const opts = {
safe: 'unsafe',
base_dir: baseDir,
backend: 'xhtml5',
attributes: {
language: language,
language_group: language,
file_extension: fileExtension(language)
}
};
const adoc = fs.readFileSync(ruleSrcFile, 'utf8');
let html = /** @type string*/ asciidoctor.convert(adoc, opts);
const jsDom = new JSDOM(html);
let body = jsDom.window.document.body;
forEachChildNode(body, cleanHtml);
forEachChildNode(body, removeUselessBlankLine);
html = body.innerHTML.trim() + '\n';
fs.writeFileSync(ruleDstFile, html, {encoding: 'utf8'});
return html;
}
function forEachChildNode(/*HTMLElement*/node, /*function*/consumer) {
for (let i = node.childNodes.length - 1; i >= 0; i--) {
consumer(node.childNodes[i]);
}
}
function cleanHtml(/*HTMLElement*/node) {
if (node.nodeType === 1/*HTMLElement*/) {
forEachChildNode(node, cleanHtml);
node.removeAttribute('id');
node.removeAttribute('class');
if (node.tagName === 'DIV') {
unwrapNode(node);
} else if (node.tagName === 'PRE') {
node.insertBefore(node.ownerDocument.createTextNode('\n'), node.firstChild);
node.appendChild(node.ownerDocument.createTextNode('\n'));
} else if (node.tagName === 'P') {
if (!node.previousElementSibling && !node.nextElementSibling && node.parentElement.tagName === 'LI') {
unwrapNode(node);
}
} else if (node.tagName === 'LI') {
if (node.firstChild && node.firstChild.nodeType === 3 && node.firstChild.nodeValue.match(/^[ \t\r\n]*$/)) {
node.removeChild(node.firstChild);
}
}
}
}
function removeUselessBlankLine(/*HTMLElement*/node) {
if (node.nodeType === 3/*Text*/) {
if (node.nextSibling && node.nextSibling.nodeType === 3/*Text*/) {
node.nodeValue = (node.nodeValue + node.nextSibling.nodeValue).replace(/(\r\n|\n|\r)[ \t]*(\r\n|\n|\r)/, '$1');
node.parentNode.removeChild(node.nextSibling);
}
} else if (node.nodeType === 1/*HTMLElement*/ && node.tagName !== 'PRE') {
forEachChildNode(node, removeUselessBlankLine);
}
}
function unwrapNode(/*HTMLElement*/node) {
while(node.firstChild) {
node.parentNode.insertBefore(node.removeChild(node.firstChild), node);
}
if (node.nextSibling && node.nextSibling.nodeType === 3 && node.nextSibling.nodeValue.match(/^[ \t\r\n]*$/)) {
node.parentNode.removeChild(node.nextSibling);
}
if (node.previousSibling && node.previousSibling.nodeType === 3 && node.previousSibling.nodeValue.match(/^[ \t\r\n]*$/)) {
node.parentNode.removeChild(node.previousSibling);
}
node.parentNode.removeChild(node);
}
function generate_rule_metadata(ruleSrcDirectory, ruleDstDirectory, language, all_languages) {
let parentFile = path.join(ruleSrcDirectory, language, "metadata.json");
const parentJson = fs.existsSync(parentFile) ? JSON.parse(fs.readFileSync(parentFile, 'utf8')) : {};
let childFile = path.join(ruleSrcDirectory, "metadata.json");
const childJson = fs.existsSync(childFile) ? JSON.parse(fs.readFileSync(childFile, 'utf8')) : {};
const mergedJson = {...childJson, ...parentJson};
mergedJson["all_languages"] = all_languages;
return mergedJson;
}
function build_search_index(ruleIndexStore) {
function selectivePipeline(token) {
const fields = token.metadata["fields"];
// process only titles and descriptions
if (fields.includes('titles') || fields.includes('descriptions') ) {
// We don't use the stopword filter to allow words such as "do", "while", "for"
const trimmed = lunr.trimmer(token);
return lunr.stemmer(trimmed);
}
return token;
}
lunr.Pipeline.registerFunction(selectivePipeline, 'selectivePipeline');
var ruleIndex = lunr(function () {
// Set our own token processing pipeline
this.pipeline.reset();
this.pipeline.add(selectivePipeline);
this.ref('id');
this.field('titles');
this.field('type');
this.field('defaultSeverity');
this.field('tags');
this.field('qualityProfiles');
this.field('descriptions');
for (const searchRecord of Object.values(ruleIndexStore)) {
this.add(searchRecord);
}
})
return ruleIndex;
}
function findSupportedLanguage(/*string*/ruleDirectory) /*string[]*/ {
return fs.readdirSync(ruleDirectory)
.filter(fileName => fs.lstatSync(path.join(ruleDirectory, fileName)).isDirectory())
.sort();
}
function fileExtension(/*string*/language) /*string*/ {
return language === "cobol" ? "cbl" : language;
}
clean_rules()
generate_rules_metadata_and_description()