RSC webpack 5 plugin

[michenly]

get the same plugin from react-server-dom-webpack to be compatible with webpack 5

• write it in TypeScript so I can make use of typing to find webpack internal interface
• build-old is the old assets the webpack 4 version of plugin produce
• to build, run npm run bundler:dev
• all the changes in plugins/react-server-dom-webpack-plugin.ts
• eventually upstream plugins/react-server-dom-webpack-plugin.js

[michenly]

The problem I am running into for getting webpack 4 -> webpack 5

• additional assets is not being created (compilation.chunkGroups only shows main so this is consistent)
• AsyncDependenciesBlock was originally created with dep.require for request param. Changed it to use dep.request but it also has undefined attached to the end. Temp just hack it out.
• compilation.chunkGraph.getChunkModulesIterable(chunk) will list our 5 modules without module.resource or module.id. However, 5 is exactly the number of additional assets the webpack 4 version create...so...there is something there...
• a manual Async chunk would get created in addChunkInGroup, b/t compilation.hooks.beforeChunks && compilation.hooks.afterChunks hooks
• at the end of complication.hooks.buildModule, module.blocks.length = 8, in compilation.hooks.succeedModule, module.blocks.length = 0, something happened in b/t

[michenly]

Found the issue. compliation.hooks.buildModule cannot be use to modify dependencies & blocks in webpack 5. Need to use hooks.parser instead webpack/webpack#13361

[michenly]

This plug in is now working in webpack 5 with 1 small hack

• request has undefined at the end: I have a hack for it so far, but need to solve it at the root level

[michenly]

Proper PR had been open facebook/react#22739 and I will open a new PR to update the demo to use the new plugin when it is ready.