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-#!/usr/bin/env node
-/**
- * html-minifier-terser CLI tool
- *
- * The MIT License (MIT)
- *
- * Copyright (c) 2014-2016 Zoltan Frombach
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
- * the Software, and to permit persons to whom the Software is furnished to do so,
- * subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
- * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
- * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- */
-
-import fs from 'fs';
-import path from 'path';
-import { createRequire } from 'module';
-import { camelCase } from 'camel-case';
-import { paramCase } from 'param-case';
-import { Command } from 'commander';
-import { minify } from './src/htmlminifier.js';
-
-const require = createRequire(import.meta.url);
-
-const pkg = require('./package.json');
-
-const program = new Command();
-program.name(pkg.name);
-program.version(pkg.version);
-
-function fatal(message) {
- console.error(message);
- process.exit(1);
-}
-
-/**
- * JSON does not support regexes, so, e.g., JSON.parse() will not create
- * a RegExp from the JSON value `[ "/matchString/" ]`, which is
- * technically just an array containing a string that begins and end with
- * a forward slash. To get a RegExp from a JSON string, it must be
- * constructed explicitly in JavaScript.
- *
- * The likelihood of actually wanting to match text that is enclosed in
- * forward slashes is probably quite rare, so if forward slashes were
- * included in an argument that requires a regex, the user most likely
- * thought they were part of the syntax for specifying a regex.
- *
- * In the unlikely case that forward slashes are indeed desired in the
- * search string, the user would need to enclose the expression in a
- * second set of slashes:
- *
- * --customAttrSrround "[\"//matchString//\"]"
- */
-function parseRegExp(value) {
- if (value) {
- return new RegExp(value.replace(/^\/(.*)\/$/, '$1'));
- }
-}
-
-function parseJSON(value) {
- if (value) {
- try {
- return JSON.parse(value);
- } catch (e) {
- if (/^{/.test(value)) {
- fatal('Could not parse JSON value \'' + value + '\'');
- }
- return value;
- }
- }
-}
-
-function parseJSONArray(value) {
- if (value) {
- value = parseJSON(value);
- return Array.isArray(value) ? value : [value];
- }
-}
-
-function parseJSONRegExpArray(value) {
- value = parseJSONArray(value);
- return value && value.map(parseRegExp);
-}
-
-function parseString(value) {
- return value;
-}
-
-const mainOptions = {
- caseSensitive: 'Treat attributes in case sensitive manner (useful for SVG; e.g. viewBox)',
- collapseBooleanAttributes: 'Omit attribute values from boolean attributes',
- collapseInlineTagWhitespace: 'Collapse white space around inline tag',
- collapseWhitespace: 'Collapse white space that contributes to text nodes in a document tree.',
- conservativeCollapse: 'Always collapse to 1 space (never remove it entirely)',
- continueOnParseError: 'Handle parse errors instead of aborting',
- customAttrAssign: ['Arrays of regex\'es that allow to support custom attribute assign expressions (e.g. \'<div flex?="{{mode != cover}}"></div>\')', parseJSONRegExpArray],
- customAttrCollapse: ['Regex that specifies custom attribute to strip newlines from (e.g. /ng-class/)', parseRegExp],
- customAttrSurround: ['Arrays of regex\'es that allow to support custom attribute surround expressions (e.g. <input {{#if value}}checked="checked"{{/if}}>)', parseJSONRegExpArray],
- customEventAttributes: ['Arrays of regex\'es that allow to support custom event attributes for minifyJS (e.g. ng-click)', parseJSONRegExpArray],
- decodeEntities: 'Use direct Unicode characters whenever possible',
- html5: 'Parse input according to HTML5 specifications',
- ignoreCustomComments: ['Array of regex\'es that allow to ignore certain comments, when matched', parseJSONRegExpArray],
- ignoreCustomFragments: ['Array of regex\'es that allow to ignore certain fragments, when matched (e.g. <?php ... ?>, {{ ... }})', parseJSONRegExpArray],
- includeAutoGeneratedTags: 'Insert tags generated by HTML parser',
- keepClosingSlash: 'Keep the trailing slash on singleton elements',
- maxLineLength: ['Max line length', parseInt],
- minifyCSS: ['Minify CSS in style elements and style attributes (uses clean-css)', parseJSON],
- minifyJS: ['Minify Javascript in script elements and on* attributes (uses terser)', parseJSON],
- minifyURLs: ['Minify URLs in various attributes (uses relateurl)', parseJSON],
- noNewlinesBeforeTagClose: 'Never add a newline before a tag that closes an element',
- preserveLineBreaks: 'Always collapse to 1 line break (never remove it entirely) when whitespace between tags include a line break.',
- preventAttributesEscaping: 'Prevents the escaping of the values of attributes.',
- processConditionalComments: 'Process contents of conditional comments through minifier',
- processScripts: ['Array of strings corresponding to types of script elements to process through minifier (e.g. "text/ng-template", "text/x-handlebars-template", etc.)', parseJSONArray],
- quoteCharacter: ['Type of quote to use for attribute values (\' or ")', parseString],
- removeAttributeQuotes: 'Remove quotes around attributes when possible.',
- removeComments: 'Strip HTML comments',
- removeEmptyAttributes: 'Remove all attributes with whitespace-only values',
- removeEmptyElements: 'Remove all elements with empty contents',
- removeOptionalTags: 'Remove unrequired tags',
- removeRedundantAttributes: 'Remove attributes when value matches default.',
- removeScriptTypeAttributes: 'Removes the following attributes from script tags: text/javascript, text/ecmascript, text/jscript, application/javascript, application/x-javascript, application/ecmascript. Other type attribute values are left intact',
- removeStyleLinkTypeAttributes: 'Remove type="text/css" from style and link tags. Other type attribute values are left intact.',
- removeTagWhitespace: 'Remove space between attributes whenever possible',
- sortAttributes: 'Sort attributes by frequency',
- sortClassName: 'Sort style classes by frequency',
- trimCustomFragments: 'Trim white space around ignoreCustomFragments.',
- useShortDoctype: 'Replaces the doctype with the short (HTML5) doctype'
-};
-
-// configure commandline flags
-const mainOptionKeys = Object.keys(mainOptions);
-mainOptionKeys.forEach(function (key) {
- const option = mainOptions[key];
- if (Array.isArray(option)) {
- key = key === 'minifyURLs' ? '--minify-urls' : '--' + paramCase(key);
- key += option[1] === parseJSON ? ' [value]' : ' <value>';
- program.option(key, option[0], option[1]);
- } else if (~['html5', 'includeAutoGeneratedTags'].indexOf(key)) {
- program.option('--no-' + paramCase(key), option);
- } else {
- program.option('--' + paramCase(key), option);
- }
-});
-program.option('-o --output <file>', 'Specify output file (if not specified STDOUT will be used for output)');
-
-function readFile(file) {
- try {
- return fs.readFileSync(file, { encoding: 'utf8' });
- } catch (e) {
- fatal('Cannot read ' + file + '\n' + e.message);
- }
-}
-
-let config = {};
-program.option('-c --config-file <file>', 'Use config file', function (configPath) {
- const data = readFile(configPath);
- try {
- config = JSON.parse(data);
- } catch (je) {
- try {
- config = require(path.resolve(configPath));
- } catch (ne) {
- fatal('Cannot read the specified config file.\nAs JSON: ' + je.message + '\nAs module: ' + ne.message);
- }
- }
- mainOptionKeys.forEach(function (key) {
- if (key in config) {
- const option = mainOptions[key];
- if (Array.isArray(option)) {
- const value = config[key];
- config[key] = option[1](typeof value === 'string' ? value : JSON.stringify(value));
- }
- }
- });
-});
-program.option('--input-dir <dir>', 'Specify an input directory');
-program.option('--output-dir <dir>', 'Specify an output directory');
-program.option('--file-ext <text>', 'Specify an extension to be read, ex: html');
-
-let content;
-program.arguments('[files...]').action(function (files) {
- content = files.map(readFile).join('');
-}).parse(process.argv);
-
-const programOptions = program.opts();
-
-function createOptions() {
- const options = {};
-
- mainOptionKeys.forEach(function (key) {
- const param = programOptions[key === 'minifyURLs' ? 'minifyUrls' : camelCase(key)];
-
- if (typeof param !== 'undefined') {
- options[key] = param;
- } else if (key in config) {
- options[key] = config[key];
- }
- });
- return options;
-}
-
-function mkdir(outputDir, callback) {
- fs.mkdir(outputDir, { recursive: true }, function (err) {
- if (err) {
- fatal('Cannot create directory ' + outputDir + '\n' + err.message);
- }
- callback();
- });
-}
-
-function processFile(inputFile, outputFile) {
- fs.readFile(inputFile, { encoding: 'utf8' }, async function (err, data) {
- if (err) {
- fatal('Cannot read ' + inputFile + '\n' + err.message);
- }
- let minified;
- try {
- minified = await minify(data, createOptions());
- } catch (e) {
- fatal('Minification error on ' + inputFile + '\n' + e.message);
- }
- fs.writeFile(outputFile, minified, { encoding: 'utf8' }, function (err) {
- if (err) {
- fatal('Cannot write ' + outputFile + '\n' + err.message);
- }
- });
- });
-}
-
-function processDirectory(inputDir, outputDir, fileExt) {
- fs.readdir(inputDir, function (err, files) {
- if (err) {
- fatal('Cannot read directory ' + inputDir + '\n' + err.message);
- }
-
- files.forEach(function (file) {
- const inputFile = path.join(inputDir, file);
- const outputFile = path.join(outputDir, file);
-
- fs.stat(inputFile, function (err, stat) {
- if (err) {
- fatal('Cannot read ' + inputFile + '\n' + err.message);
- } else if (stat.isDirectory()) {
- processDirectory(inputFile, outputFile, fileExt);
- } else if (!fileExt || path.extname(file) === '.' + fileExt) {
- mkdir(outputDir, function () {
- processFile(inputFile, outputFile);
- });
- }
- });
- });
- });
-}
-
-const writeMinify = async () => {
- const minifierOptions = createOptions();
- let minified;
-
- try {
- minified = await minify(content, minifierOptions);
- } catch (e) {
- fatal('Minification error:\n' + e.message);
- }
-
- let stream = process.stdout;
-
- if (programOptions.output) {
- stream = fs.createWriteStream(programOptions.output)
- .on('error', (e) => {
- fatal('Cannot write ' + programOptions.output + '\n' + e.message);
- });
- }
-
- stream.write(minified);
-};
-
-const { inputDir, outputDir, fileExt } = programOptions;
-
-if (inputDir || outputDir) {
- if (!inputDir) {
- fatal('The option output-dir needs to be used with the option input-dir. If you are working with a single file, use -o.');
- } else if (!outputDir) {
- fatal('You need to specify where to write the output files with the option --output-dir');
- }
- processDirectory(inputDir, outputDir, fileExt);
-} else if (content) { // Minifying one or more files specified on the CMD line
- writeMinify();
-} else { // Minifying input coming from STDIN
- content = '';
- process.stdin.setEncoding('utf8');
- process.stdin.on('data', function (data) {
- content += data;
- }).on('end', writeMinify);
-}