listGnomeExtensionGiDependencies.mjs

#!/usr/bin/env node
import esbuild from "esbuild";
import fs from "fs/promises";
import { resolve as resolvePath } from "path";

const [root] = process.argv.slice(2);
console.log(JSON.stringify(await getGnomeExtensionGiDependencies(root)));

async function getGnomeExtensionGiDependencies(root) {
  const entryPoints = [resolvePath(root, "extension.js")];

  const prefsPath = resolvePath(root, "prefs.js");
  try {
    await fs.access(prefsPath);
    entryPoints.push(prefsPath);
  } catch {}

  const { metafile } = await esbuild.build({
    entryPoints,
    outdir: "/tmp/gnome-extension-analyzer",
    bundle: true,
    format: "esm",
    external: ["gi", "system", "cairo", "gettext", "gi://*", "resource://*"],
    metafile: true,
    logLevel: "silent",
  });

  return Object.fromEntries(
    Object.entries(metafile.outputs).map(([path, file]) => [
      path.split("/").at(-1),
      dedupe(
        file.imports
          .map((module) => module.path)
          .filter((path) => path.startsWith("gi://"))
      ),
    ])
  );
}

function dedupe(arr) {
  return Array.from(new Set(arr));
}