add canonical fingerprint ota export tooling

scripts/ota/package-legacy-export.js

@@ -0,0 +1,48 @@
+#!/usr/bin/env node
+/* oxlint-disable import/no-nodejs-modules -- This is a Node-only build script. */
+const crypto = require('crypto')
+const fs = require('fs')
+const fsp = fs.promises
+const path = require('path')
+const source = path.resolve('dist')
+const destination = path.resolve('bundleTempDir')
+async function hash(file) {
+  const value = crypto.createHash('md5')
+  for await (const chunk of fs.createReadStream(file)) value.update(chunk)
+  return value.digest('hex')
+}
+async function main() {
+  /** @type {{fileMetadata: Record<string, {bundle: string, assets?: {path: string, ext: string}[]}>}} */
+  const metadata = JSON.parse(
+    await fsp.readFile(path.join(source, 'metadata.json'), 'utf8'),
+  )
+  await fsp.mkdir(path.join(destination, 'bundles'), {recursive: true})
+  await fsp.mkdir(path.join(destination, 'assets'), {recursive: true})
+  const result = {version: 0, bundler: 'metro', fileMetadata: {}}
+  for (const platform of ['ios', 'android']) {
+    const input = metadata.fileMetadata?.[platform]
+    if (!input?.bundle)
+      throw new Error(
+        `Missing explicit ${platform} bundle in dist/metadata.json`,
+      )
+    const bundleSource = path.resolve(source, input.bundle)
+    const bundle = `bundles/${await hash(bundleSource)}.bundle`
+    await fsp.copyFile(bundleSource, path.join(destination, bundle))
+    const assets = []
+    for (const asset of input.assets ?? []) {
+      const assetSource = path.resolve(source, asset.path)
+      const target = `assets/${await hash(assetSource)}.${asset.ext}`
+      await fsp.copyFile(assetSource, path.join(destination, target))
+      assets.push(target)
+    }
+    result.fileMetadata[platform] = {bundle, assets}
+  }
+  await fsp.writeFile(
+    path.join(destination, 'metadata.json'),
+    JSON.stringify(result),
+  )
+}
+main().catch(error => {
+  console.error(error)
+  process.exitCode = 1
+})