[Pkg-javascript-devel] Bug#958780: Bug#958780: do we really want to do this ?

[Pirate Praveen]

On Thu, Apr 30, 2020 at 6:57 pm, Paolo Greppi <paolo.greppi at libpf.com> 
wrote:
> see below ...
> 
> Il 30/04/20 18:10, Pirate Praveen ha scritto:
>>  ...
>>  I have pushed my changes to babel7 branch and the error I get is,
>> 
>>  gulp build
>>  [15:53:07] Local gulp not found in /<<PKGBUILDDIR>>
>>  [15:53:07] Try running: npm install gulp
>>  [15:53:07] Using globally installed gulp
>>  [15:53:07] Using gulpfile /<<PKGBUILDDIR>>/gulpfile.js
>>  [15:53:07] Starting 'build'...
>>  [15:53:13] Finished 'build' after 6.18 s
>>  node ./scripts/build-webpack.js
>>  Unhandled rejection TypeError: fileDependencies.map is not a 
>> function
>>     at compiler.run 
>> (/<<PKGBUILDDIR>>/scripts/build-webpack.js:118:38)
>>  ...
> 
> If you get that, it means webpack failed.
> The confusing error is because the stats data structure of our 
> webpack (4.30.0) is not compatible with the webpack they expect 
> (2.7.0).
> 
> To actually see the errors, tweak the compiler.run callback like this:
> 
> compiler.run((err, stats) => {
>   var stringify = require('json-stringify-safe');
>   console.log(stringify(stats, null, 2));
> });
> 
> I attach the JSON it prints. Sample extract:
> 
> "error": {
>   "origin": null,
>   "dependencies": null,
>   "module": "[Circular ~.compilation.entries.0]",
>   "name": "ModuleBuildError",
>   "error": {
>     "code": "BABEL_VERSION_UNSUPPORTED",
>     "version": "6.26.0",
>     "range": "^7.0.0-0"
>   }
> }

I think it would be easier to embed gulp-babel 7.x in node-yarnpkg 
until we can update babel-loader also.