Extract shared bundler config helpers (Rspack split 1/4)

Stanislav Lashmanovrequested to merge
slashmanov/rspack-1-webpack-restructure into master

What

Extracts shared bundler configuration — aliases, entry points, output, the supported-browser hash, and Vue-version detection — out of config/webpack.config.js into config/helpers/*, so a second bundler can consume the same definitions.

Pure refactor: Webpack and Vite output are unchanged. generateEntries() now returns { entries } (all callers updated), and a few shared constants/copy patterns are made explicit for cross-bundler reuse.

Why

Foundation for the opt-in Rspack build — Rspack and Webpack must share a single source of truth for these definitions rather than duplicating them.

Verify

Webpack/Vite asset parity; no behavioral change expected.

Part 1 of 4 of splitting the opt-in Rspack build (!242376 (closed)) into reviewable, dependency-ordered pieces.

Epic: &22569 · Proposal: #604382 (closed) · Original spike: !242376 (closed)

Stacked series — review/merge in order

  1. Extract shared bundler config helpers — !243055 (merged) ← this MR
  2. Initial Rspack config structure + deps — !243056 (merged)
  3. Rspack plugins + Vue 2/3 infection — !243057 (merged)
  4. Build/dev-server wiring, asset namespacing & CI — !243058 (merged)
Edited by Stanislav Lashmanov

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