theseus/addon-build/docx-editor/build.mjs

// Bundles the add-on's npm dependencies into
// bundled-addons/docx-editor/vendor/docx-vendor.js.
//
//   npm run build        (from addon-build/docx-editor/)
//
// mammoth is patched on the way through — see patches.mjs for why. The
// patched copy is materialised under .patched/ so the node round-trip tests
// exercise exactly the same reader the browser does.
import * as esbuild from "esbuild";
import { mkdirSync, writeFileSync, readFileSync, statSync, rmSync, cpSync } from "node:fs";
import { fileURLToPath } from "node:url";
import path from "node:path";
import { applyPatches, patches } from "./patches.mjs";

const here = path.dirname(fileURLToPath(import.meta.url));
const out  = path.resolve(here, "../../bundled-addons/docx-editor/vendor");
const patchedRoot = path.join(here, ".patched");

// --- 1. patched mammoth ---------------------------------------------------
rmSync(patchedRoot, { recursive: true, force: true });
mkdirSync(patchedRoot, { recursive: true });
cpSync(path.join(here, "node_modules", "mammoth"), path.join(patchedRoot, "mammoth"), { recursive: true });
const touched = new Set();
for (const p of patches) {
  const f = path.join(patchedRoot, "mammoth", p.file);
  if (touched.has(f)) continue;
  touched.add(f);
}
for (const f of touched) {
  const rel = "mammoth/" + path.relative(path.join(patchedRoot, "mammoth"), f).split(path.sep).join("/");
  const { code, hits } = applyPatches(rel, readFileSync(f, "utf8"));
  writeFileSync(f, code);
  console.log(`patched ${rel} (${hits} hunks)`);
}

// --- 2. bundle ------------------------------------------------------------
mkdirSync(out, { recursive: true });
const res = await esbuild.build({
  entryPoints: [path.join(here, "vendor-entry.js")],
  bundle: true,
  minify: true,
  format: "iife",
  platform: "browser",
  target: ["chrome120"],
  legalComments: "none",
  outfile: path.join(out, "docx-vendor.js"),
  define: { "process.env.NODE_ENV": '"production"' },
  alias: { mammoth: path.join(patchedRoot, "mammoth") },
  logLevel: "info",
});
if (res.errors.length) process.exit(1);

// --- 3. licences ----------------------------------------------------------
// Vendored code without its licence text is the kind of thing that bites
// later; this file ships next to the bundle.
const pkgs = ["mammoth", "docx", "jszip", "underscore", "orderedmap", "w3c-keyname",
  "rope-sequence", "prosemirror-state", "prosemirror-view", "prosemirror-model",
  "prosemirror-schema-basic", "prosemirror-schema-list", "prosemirror-tables",
  "prosemirror-history", "prosemirror-commands", "prosemirror-keymap",
  "prosemirror-inputrules", "prosemirror-dropcursor", "prosemirror-gapcursor",
  "prosemirror-transform"];
let notice = "Third-party code bundled into vendor/docx-vendor.js\n" +
             "===================================================\n\n" +
             "mammoth is shipped with small local patches (colour, paragraph spacing,\n" +
             "numbering format); see addon-build/docx-editor/patches.mjs.\n\n";
for (const p of pkgs) {
  let j; try { j = JSON.parse(readFileSync(path.join(here, "node_modules", p, "package.json"), "utf8")); }
  catch { continue; }
  let text = "";
  for (const f of ["LICENSE", "LICENSE.md", "LICENSE.txt", "LICENCE", "license", "LICENSE-MIT"]) {
    try { text = readFileSync(path.join(here, "node_modules", p, f), "utf8").trim(); break; } catch {}
  }
  notice += `--- ${p} ${j.version} — ${j.license || "see project"} ---\n` +
    (text || `(no licence file in the package; see ${j.homepage || j.repository?.url || "the project homepage"})`) + "\n\n";
}
writeFileSync(path.join(out, "LICENSES.txt"), notice);
console.log(`vendor bundle: ${(statSync(path.join(out, "docx-vendor.js")).size / 1024).toFixed(0)} KB`);