Factor manifest code to reduce the bundle size

[vicb]

Changes from #1212:

• remove EmptyEdgeMappings
• rules do not require a fix any more, remove that
• use SHA1 prefix instead of full SHA1
• add tests

supersedes #1186 and #1212

The following manifest:

globalThis.__RSC_MANIFEST = globalThis.__RSC_MANIFEST || {};
globalThis.__RSC_MANIFEST["/dashboard/page"] = {
  moduleLoading: { prefix: "", crossOrigin: null },
  clientModules: {
    "[project]/node_modules/.pnpm/next@16.1.6_@babel+core@7.29.0_react-dom@19.2.3_react@19.2.3__react@19.2.3/node_modules/next/dist/esm/client/components/layout-router.js <module evaluation>":
      {
        id: 3097,
        name: "*",
        chunks: [
          "/_next/static/chunks/33074d3ff5d0cd2d.js",
          "/_next/static/chunks/eb1e789fab5a5185.js",
        ],
        async: false,
      },
    "[project]/node_modules/.pnpm/next@16.1.6_@babel+core@7.29.0_react-dom@19.2.3_react@19.2.3__react@19.2.3/node_modules/next/dist/esm/client/components/layout-router.js":
      {
        id: 3097,
        name: "*",
        chunks: [
          "/_next/static/chunks/33074d3ff5d0cd2d.js",
          "/_next/static/chunks/eb1e789fab5a5185.js",
        ],
        async: false,
      },
      // ...
  },
  ssrModuleMapping: {
    3097: {
      "*": {
        id: 76237,
        name: "*",
        chunks: [
          "server/chunks/ssr/[root-of-the-server]__5a337f56._.js",
          "server/chunks/ssr/b2b3e_next_dist_2953b357._.js",
        ],
        async: false,
      },
    },
    // ...
  },
  edgeSSRModuleMapping: {},
  rscModuleMapping: {
    3097: { "*": { id: 8465, name: "*", chunks: [], async: false } },
    99299: { "*": { id: 37954, name: "*", chunks: [], async: false } },
    // ...
  },
  edgeRscModuleMapping: {},
  entryCSSFiles: {
    "[project]/app/favicon.ico": [],
    "[project]/node_modules/.pnpm/next@16.1.6_@babel+core@7.29.0_react-dom@19.2.3_react@19.2.3__react@19.2.3/node_modules/next/dist/client/components/builtin/global-error":
      [],
    "[project]/app/dashboard/page": [],
  },
  entryJSFiles: {
    "[project]/app/favicon.ico": [
      "static/chunks/33074d3ff5d0cd2d.js",
      "static/chunks/eb1e789fab5a5185.js",
    ],
    "[project]/node_modules/.pnpm/next@16.1.6_@babel+core@7.29.0_react-dom@19.2.3_react@19.2.3__react@19.2.3/node_modules/next/dist/client/components/builtin/global-error":
      [],
    "[project]/app/dashboard/page": ["static/chunks/1dd517b60221a725.js"],
  },
};

is transformed to

const vc7a = ["/_next/static/chunks/33074d3ff5d0cd2d.js", "/_next/static/chunks/eb1e789fab5a5185.js"];

const v4dd = {
    "[project]/app/favicon.ico": ["static/chunks/33074d3ff5d0cd2d.js", "static/chunks/eb1e789fab5a5185.js"],
    "[project]/node_modules/.pnpm/next@16.1.6_@babel+core@7.29.0_react-dom@19.2.3_react@19.2.3__react@19.2.3/node_modules/next/dist/client/components/builtin/global-error": [],
    "[project]/app/dashboard/page": ["static/chunks/1dd517b60221a725.js"]
};

const vafa = {
    "[project]/node_modules/.pnpm/next@16.1.6_@babel+core@7.29.0_react-dom@19.2.3_react@19.2.3__react@19.2.3/node_modules/next/dist/esm/client/components/layout-router.js <module evaluation>": {
        "id": 3097,
        "name": "*",
        "chunks": vc7a,
        "async": false
    },
    "[project]/node_modules/.pnpm/next@16.1.6_@babel+core@7.29.0_react-dom@19.2.3_react@19.2.3__react@19.2.3/node_modules/next/dist/esm/client/components/layout-router.js": {
        "id": 3097,
        "name": "*",
        "chunks": vc7a,
        "async": false
    },
    // ...
};

globalThis.__RSC_MANIFEST["/dashboard/page"] = {
    "moduleLoading": {
        "prefix": "",
        "crossOrigin": null
    },
    "clientModules": vafa,
    "ssrModuleMapping": v091,
    "edgeSSRModuleMapping": {},
    "rscModuleMapping": v639,
    "edgeRscModuleMapping": {},
    "entryCSSFiles": v6f8,
    "entryJSFiles": v4dd
};

[changeset-bot]

🦋 Changeset detected

Latest commit: 663d74f

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@opennextjs/cloudflare	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@opennextjs/cloudflare@1215

commit: 663d74f

[mgallagher]

For our build, this PR a slightly smaller bundle compared to #1212

Baseline

Next 16.2.4
@opennext/cloudflare 1.19.2

Turbopack:
Total Upload: 58427.44 KiB / gzip: 9224.35 KiB
Webpack:
Total Upload: 66146.16 KiB / gzip: 9213.08 KiB

This PR

Turbopack:
Total Upload: 42842.04 KiB / gzip: 8533.55 KiB
Webpack:
Total Upload: 41919.49 KiB / gzip: 7605.62 KiB

[vicb]

Thanks for the review @conico974 🙏