Support rspack only projects

[samssouza]

Hello, on rspack only projects when we use the plugin @sentry/webpack-plugin we get the following error during build:

Error: Cannot find module 'webpack'
  at /node_modules/@sentry/webpack-plugin/dist/cjs/index.js

Suggestion

// src/index.ts

Fall back to @rspack/core if webpack is not found or something similar.

let webpack4or5: any = {};

try {
  webpack4or5 = require("webpack");
} catch {
  try {
    webpack4or5 = require("@rspack/core");
  } catch {}
}

const BannerPlugin = webpack4or5?.BannerPlugin || webpack4or5?.default?.BannerPlugin;
const DefinePlugin = webpack4or5?.DefinePlugin || webpack4or5?.default?.DefinePlugin;

And mark both as optional peer dependencies

"peerDependenciesMeta": {
  "webpack": { "optional": true },
  "@rspack/core": { "optional": true }
}

Would that be possible?

[linear-code]

BUNDLER-122

[s1gr1d]

Hi, I created a PR for that, but we probably don't need @rspack/core as a peer dependency here as it already populates compiler.webpack.

• fix(webpack): Make webpack import lazy to support rspack-only projects #940

[samssouza]

Hi, I created a PR for that, but we probably don't need @rspack/core as a peer dependency here as it already populates compiler.webpack.

• fix(webpack): Make webpack import lazy to support rspack-only projects #940

That's awesome thank you so much