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"use strict";
const { src, dest, series, parallel, watch } = require('gulp');
const rename = require('gulp-rename');
const uglify = require('gulp-uglify');
const header = require('gulp-header');
const concat = require('gulp-concat');
const replace = require('gulp-replace');
const pump = require('pump');
const util = require('util');
const fs = require('fs');
const paths = require('./paths');
const { changes, linkify } = require('./changelog');
const { docs } = require('./docs');
const componentsPromise = new Promise((resolve, reject) => {
fs.readFile(paths.componentsFile, {
encoding: 'utf-8'
}, (err, data) => {
if (!err) {
resolve(JSON.parse(data));
} else {
reject(err);
}
});
});
function inlineRegexSource() {
return replace(
/\/((?:[^\n\r[\\\/]|\\.|\[(?:[^\n\r\\\]]|\\.)*\])+)\/\s*\.\s*source\b/g,
(m, source) => {
// escape backslashes
source = source.replace(/\\(.)|\[(\\s\\S|\\S\\s)\]/g, function (m, g1, g2) {
if (g1) {
// characters like /\n/ can just be kept as "\n" instead of being escaped to "\\n"
if (/[nrt0/]/.test(g1)) {
return m;
}
if ('\\' == g1) {
return '\\\\\\\\'; // escape using 4 backslashes
}
return '\\\\' + g1;
} else {
return "[^]";
}
});
// escape single quotes
source = source.replace(/'/g, "\\'");
// wrap source in single quotes
return "'" + source + "'";
}
);
}
function minifyJS() {
return [
inlineRegexSource(),
uglify()
];
}
function minifyComponents(cb) {
pump([src(paths.components), ...minifyJS(), rename({ suffix: '.min' }), dest('components')], cb);
}
function minifyPlugins(cb) {
pump([src(paths.plugins), ...minifyJS(), rename({ suffix: '.min' }), dest('plugins')], cb);
}
function build(cb) {
pump([src(paths.main), header(`
/* **********************************************
Begin <%= file.relative %>
********************************************** */
`), concat('prism.js'), dest('./')], cb);
}
async function componentsJsonToJs() {
const data = await componentsPromise;
const js = `var components = ${JSON.stringify(data)};
if (typeof module !== 'undefined' && module.exports) { module.exports = components; }`;
return util.promisify(fs.writeFile)(paths.componentsFileJS, js);
}
function watchComponentsAndPlugins() {
watch(paths.components, parallel(minifyComponents, build));
watch(paths.plugins, parallel(minifyPlugins, build));
}
async function languagePlugins() {
const data = await componentsPromise;
/** @type {Record<string, string | null>} */
const languagesMap = {};
const dependenciesMap = {};
const aliasMap = {};
/**
* Tries to guess the name of a language given its id.
*
* From `prism-show-language.js`.
*
* @param {string} id The language id.
* @returns {string}
*/
function guessTitle(id) {
if (!id) {
return id;
}
return (id.substring(0, 1).toUpperCase() + id.substring(1)).replace(/s(?=cript)/, 'S');
}
/**
* @param {string} key
* @param {string} title
*/
function addLanguageTitle(key, title) {
if (!(key in languagesMap)) {
if (guessTitle(key) === title) {
languagesMap[key] = null;
} else {
languagesMap[key] = title;
}
}
}
for (const id in data.languages) {
if (id !== 'meta') {
const language = data.languages[id];
const title = language.displayTitle || language.title;
addLanguageTitle(id, title);
for (const name in language.aliasTitles) {
addLanguageTitle(name, language.aliasTitles[name]);
}
if (language.alias) {
if (typeof language.alias === 'string') {
aliasMap[language.alias] = id;
addLanguageTitle(language.alias, title);
} else {
language.alias.forEach(function (alias) {
aliasMap[alias] = id;
addLanguageTitle(alias, title);
});
}
}
if (language.require) {
dependenciesMap[id] = language.require;
}
}
}
function formattedStringify(json) {
return JSON.stringify(json, null, '\t').replace(/\n/g, '\n\t');
}
/** @type {Record<string, string>} */
const nonNullLanguageMap = {};
for (const id in languagesMap) {
const title = languagesMap[id];
if (title) {
nonNullLanguageMap[id] = title;
}
}
const jsonLanguagesMap = formattedStringify(nonNullLanguageMap);
const jsonDependenciesMap = formattedStringify(dependenciesMap);
const jsonAliasMap = formattedStringify(aliasMap);
const tasks = [
{
plugin: paths.showLanguagePlugin,
maps: { languages: jsonLanguagesMap }
},
{
plugin: paths.autoloaderPlugin,
maps: { aliases: jsonAliasMap, dependencies: jsonDependenciesMap }
}
];
// TODO: Use `Promise.allSettled` (https://github.com/tc39/proposal-promise-allSettled)
const taskResults = await Promise.all(tasks.map(async task => {
try {
const value = await new Promise((resolve, reject) => {
const stream = src(task.plugin)
.pipe(replace(
/\/\*(\w+)_placeholder\[\*\/[\s\S]*?\/\*\]\*\//g,
(m, mapName) => `/*${mapName}_placeholder[*/${task.maps[mapName]}/*]*/`
))
.pipe(dest(task.plugin.substring(0, task.plugin.lastIndexOf('/'))));
stream.on('error', reject);
stream.on('end', resolve);
});
return { status: 'fulfilled', value };
} catch (error) {
return { status: 'rejected', reason: error };
}
}));
const rejectedTasks = taskResults.filter(/** @returns {r is {status: 'rejected', reason: any}} */ r => r.status === 'rejected');
if (rejectedTasks.length > 0) {
throw rejectedTasks.map(r => r.reason);
}
}
const components = minifyComponents;
const plugins = series(languagePlugins, minifyPlugins);
module.exports = {
watch: watchComponentsAndPlugins,
default: series(parallel(components, plugins, componentsJsonToJs, build), docs),
linkify,
changes
};