css-slam/lib/cli.js

Minimal CSS, fast

"use strict";
/**
 * @license
 * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.
 * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
 * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
 * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
 * Code distributed by Google as part of the polymer project is also
 * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
 */
Object.defineProperty(exports, "__esModule", { value: true });
const fs = require("fs");
const path = require("path");
const slam = require("./index");
const cliArgs = require("command-line-args");
const getCliUsage = require("command-line-usage");
const options = [
    {
        name: 'source',
        alias: 's',
        type: String,
        description: 'File to clean',
        defaultOption: true
    },
    {
        name: 'type',
        alias: 't',
        type: function (t) {
            return t.toLowerCase();
        },
        description: 'Type of file to clean. Choices are "html" and "css"'
    },
    {
        name: 'help',
        alias: 'h',
        type: Boolean,
        description: 'Print this message'
    }
];
const args = cliArgs(options);
function getUsage() {
    return getCliUsage([
        {
            header: 'css-slam',
            content: 'Minimal CSS, fast'
        },
        {
            header: 'Options',
            optionList: options
        }
    ]);
}
if (args.help) {
    console.log(getUsage());
    process.exit(0);
}
if (!args.type) {
    console.log('Must pick a type with --type|-t!');
    console.log(getUsage());
    process.exit(1);
}
const source = args.source;
function processSource(text) {
    const type = args.type;
    if (type === 'html') {
        return slam.html(text);
    }
    else if (type === 'css') {
        return slam.css(text);
    }
    else {
        console.error('Only supported types are "html" and "css"!');
        console.error(getUsage());
        process.exit(1);
    }
}
if (source) {
    const clean = processSource(fs.readFileSync(path.resolve(source), 'utf-8'));
    console.log(clean);
}
else if (!process.stdin.isTTY) {
    const chunks = [];
    process.stdin.setEncoding('utf-8');
    process.stdin.on('readable', function () {
        const chunk = process.stdin.read();
        if (chunk !== null) {
            chunks.push(chunk);
        }
    });
    process.stdin.on('end', function () {
        console.log(processSource(chunks.join('')));
    });
}
else {
    console.error('Missing source file!');
    console.error('Supply file with STDIN or --source flag');
    console.error(getUsage());
    process.exit(1);
}
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