developers.urbit.org/lib/buildGlossary.js

const fs = require("fs");
const path = require("path");
const matter = require("gray-matter");
const toml = require("@iarna/toml");

const options = {
    engines: {
        toml: toml.parse.bind(toml),
    },
    language: "toml",
    delimiters: "+++",
};

const glossary = [];

function buildGlossary(dir) {
    const children = fs.readdirSync(dir, { withFileTypes: true });
    const pages = children.filter((f) => f.isFile() && f.name !== "_index.md");
    const subdirs = children.filter(
        (f) => f.isDirectory()
    );
    pages.map((page) => {
        const { data } = matter(fs.readFileSync(path.join(dir, page.name)), options);
        const glossaryEntry = data.glossaryEntry
            ? Object.values(data.glossaryEntry)
                .map((e) => ({
                    ...e, ...{
                        url: "https://developers.urbit.org" + path.join(
                            dir.substr(dir.indexOf("content") + 7),
                            "/",
                            [page.name.replace(/.md$/, ""), e.slug].join('')
                        )
                    }
                }))
            : [];
        glossaryEntry.forEach((entry) => glossary.push(entry));
    });

    Object.fromEntries(
        subdirs.map((subdir) => [
            subdir.name,
            buildGlossary(path.join(dir, subdir.name)),
        ])
    );
}

buildGlossary(path.join(process.cwd(), "content"));
const fileContents = `export const glossary = ${JSON.stringify(glossary)}`;

try {
    fs.readdirSync("cache");
} catch (err) {
    fs.mkdirSync("cache");
}

fs.writeFile("cache/glossary.js", fileContents, function (err) {
    if (err) return console.error(err);
    console.log("Site glossary created.");
});