zulip/tools/setup/generate-custom-icon-webfont

#!/usr/bin/env node

const fs = require('fs');
const webfontsGenerator = require('webfonts-generator');

fs.readdir('./static/assets/icons', function (err, files) {
    if (err) {
        console.error(err);
        process.exit(1);
    }

    // Filter out any non-SVG files and join by absolute path
    const svg = files.filter(function (file) {
        return file.slice(-4) === '.svg';
    }).map(function (file) {
        return './static/assets/icons/' + file;
    });

    // Generate webfonts
    const options = {
        files: svg,
        dest: './static/generated/icons/fonts',
        fontName: 'zulip-icons',
        cssDest: './static/generated/icons/style.css',
        cssFontsUrl: 'fonts/',
        templateOptions: {
            classPrefix: '',
            baseSelector: '.zulip-icon',
        },
        cssTemplate: './static/icons/fonts/template.hbs',
    };
    webfontsGenerator(options, function (err) {
        if (err) {
            console.error(err);
            process.exit(1);
        }
        console.log('SUCCESS! Webfonts generated in ./static/generated/icons/fonts.');
    });
});