Incompatible with Webpack 5

[tigt]

Version: 6.2.9

Details

Webpack 5 recently released, and @DylanPiercey asked if I had run into any compat issues when trying to upgrade.

Answer: yes.

Expected Behavior

A successful Webpack 4 config without deprecation warnings should successfully complete a build after upgrading to "webpack": "^5".

Actual Behavior

Errors are thrown and a deprecation message is shown.

Your Environment

• Environment name and version (e.g. Chrome 39, node.js 5.4): Node.js v14.6.0
• Operating System and version (desktop or mobile): MacOS

Steps to Reproduce

1. Check out the @marko/webpack sample repo
2. Change the "webpack" version in its package.json to "^5"
3. Run the build

Stack Trace

~/repo/node_modules/webpack-virtual-modules/index.js:84
  if (storage.data instanceof Map) {
              ^

TypeError: Cannot read property 'data' of undefined
    at setData (~/repo/node_modules/webpack-virtual-modules/index.js:84:15)
    at CachedInputFileSystem.finalInputFileSystem._writeVirtualFile (~/repo/node_modules/webpack-virtual-modules/index.js:118:9)
    at VirtualModulesPlugin.writeModule (~/repo/node_modules/webpack-virtual-modules/index.js:64:24)
    at ~/repo/node_modules/webpack-virtual-modules/index.js:165:14
    at Array.forEach (<anonymous>)
    at afterResolversHook (~/repo/node_modules/webpack-virtual-modules/index.js:164:40)
    at Hook.eval [as call] (eval at create (~/repo/node_modules/tapable/lib/HookCodeFactory.js:19:10), <anonymous>:7:1)
    at Hook.CALL_DELEGATE [as _call] (~/repo/node_modules/tapable/lib/Hook.js:14:14)
    at WebpackOptionsApply.process (~/repo/node_modules/webpack/lib/WebpackOptionsApply.js:555:33)
    at createCompiler (~/repo/node_modules/webpack/lib/webpack.js:78:28)

yarn why confirms the bad version of webpack-virtual-modules is imported by @marko/webpack.

Forcibly upgrading webpack-virtual-modules to 0.3.1 via resolutions fixes the above error, but produces a new one:

TypeError: desc.import is not iterable
    at ~/repo/node_modules/webpack/lib/DynamicEntryPlugin.js:56:33
    at processTicksAndRejections (internal/process/task_queues.js:93:5)

Also, it produces this trace for a deprecation:

(node:28127) [DEP_WEBPACK_COMPILATION_NORMAL_MODULE_LOADER_HOOK] DeprecationWarning: Compilation.hooks.normalModuleLoader was moved to NormalModule.getCompilationHooks(compilation).loader
    at getNormalModuleLoader (~/repo/node_modules/webpack/lib/Compilation.js:295:39)
    at Object.get normalModuleLoader [as normalModuleLoader] (~/repo/node_modules/webpack/lib/Compilation.js:601:12)
    at ~/repo/node_modules/@marko/webpack/dist/plugin/index.js:58:35
    at Hook.eval [as call] (eval at create (~/repo/node_modules/tapable/lib/HookCodeFactory.js:19:10), <anonymous>:9:1)
    at Hook.CALL_DELEGATE [as _call] (~/repo/node_modules/tapable/lib/Hook.js:14:14)
    at Compiler.newCompilation (~/repo/node_modules/webpack/lib/Compiler.js:915:30)
    at ~/repo/node_modules/webpack/lib/Compiler.js:957:29
    at Hook.eval [as callAsync] (eval at create (~/repo/node_modules/tapable/lib/HookCodeFactory.js:33:10), <anonymous>:6:1)
    at Hook.CALL_ASYNC_DELEGATE [as _callAsync] (~/repo/node_modules/tapable/lib/Hook.js:18:14)
    at Compiler.compile (~/repo/node_modules/webpack/lib/Compiler.js:952:28)

[tigt]

Related: #42

[xtremespb]

So it's fixed in #42, but when shall we get a release? ;-)

[DylanPiercey]

Released in ^7