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simple-icons/scripts/build-package.js
2021-04-15 17:33:25 +01:00

90 lines
2.6 KiB
JavaScript

#!/usr/bin/env node
/**
* @fileoverview
* Compiles our icons into static .js files that can be imported in the browser
* and are tree-shakeable. The static .js files go in icons/{filename}.js. Also
* generates an index.js that exports all icons by title, but is not
* tree-shakeable
*/
const fs = require("fs");
const path = require("path");
const util = require("util");
const minify = require("uglify-js").minify;
const UTF8 = "utf8";
const dataFile = path.resolve(__dirname, "..", "_data", "simple-icons.json");
const indexFile = path.resolve(__dirname, "..", "index.js");
const iconsDir = path.resolve(__dirname, "..", "icons");
const indexTemplateFile = path.resolve(__dirname, "templates", "index.js");
const iconObjectTemplateFile = path.resolve(__dirname, "templates", "icon-object.js");
const indexTemplate = fs.readFileSync(indexTemplateFile, UTF8);
const iconObjectTemplate = fs.readFileSync(iconObjectTemplateFile, UTF8);
const data = require(dataFile);
const { getIconSlug, titleToSlug } = require("./utils.js");
// Local helper functions
function escape(value) {
return value.replace(/(?<!\\)'/g, "\\'");
}
function iconToKeyValue(icon) {
let iconName = escape(icon.title);
if (icon.slug !== titleToSlug(icon.title)) {
iconName = icon.slug;
}
return `'${iconName}':${iconToObject(icon)}`;
}
function licenseToObject(license) {
if (license === undefined) {
return;
}
if (license.url === undefined) {
license.url = `https://spdx.org/licenses/${license.type}`;
}
return license;
}
function iconToObject(icon) {
return util.format(iconObjectTemplate,
escape(icon.title),
escape(icon.slug),
escape(icon.svg),
escape(icon.source),
escape(icon.hex),
icon.guidelines ? `'${escape(icon.guidelines)}'` : undefined,
licenseToObject(icon.license),
);
}
function minifyAndWrite(filepath, rawJavaScript) {
const { error, code } = minify(rawJavaScript);
if (error) {
console.error(error);
process.exit(1);
} else {
fs.writeFileSync(filepath, code);
}
}
// 'main'
const icons = [];
data.icons.forEach(icon => {
const filename = getIconSlug(icon);
const svgFilepath = path.resolve(iconsDir, `${filename}.svg`);
icon.svg = fs.readFileSync(svgFilepath, UTF8).replace(/\r?\n/, '');
icon.slug = filename;
icons.push(icon);
// write the static .js file for the icon
const jsFilepath = path.resolve(iconsDir, `${filename}.js`);
minifyAndWrite(jsFilepath, `module.exports=${iconToObject(icon)};`);
});
// write our generic index.js
const rawIndexJs = util.format(indexTemplate, icons.map(iconToKeyValue).join(','));
minifyAndWrite(indexFile, rawIndexJs);