[Pkg-javascript-devel] babel 7 bootstrap problem and reify

[Pirate Praveen]

On ചൊ, Jan 21, 2020 at 14:28, Pirate Praveen 
<praveen at onenetbeyond.org> wrote:
> 
> 
> On ചൊ, Jan 21, 2020 at 13:20, Pirate Praveen 
> <praveen at onenetbeyond.org> wrote:
>> 
>> 
>> On തി, Jan 20, 2020 at 21:45, Pirate Praveen 
>> <praveen at onenetbeyond.org> wrote:
>>> Hi,
>>> 
>>> Just came across this module today https://github.com/benjamn/reify 
>>> I was wondering if we could use this module to load ES6 files of 
>>> babel directly (as we are stuck trying to build babel 7 and it 
>>> needs babel 7 to build).
>>> 
>>> Comments?
>>> 
>>> Praveen
>>> 
>> 
>> With the following lines in .babelrc, some packages/* can be build 
>> with babeljs 6.
>> 
>> {
>>  "presets": [
>>      "env",
>>      "flow"
>>  ],
>>  "plugins": [
>>    [
>>      "transform-object-rest-spread",
>>    ]
>>  ],
>> }
>> 
>> babeljs packages/babel-plugin-proposal-class-properties/src -d 
>> packages/babel-plugin-proposal-class-properties/lib
>> 
>> packages/babel-plugin-proposal-class-properties/src/index.js -> 
>> packages/babel-plugin-proposal-class-properties/lib/index.js
>> 
>> But some packages are using babel 7 only plugins. For example, 
>> building babel-core fails with this error. Anyone knows which 
>> plugin is used here?
>> 
>> babeljs packages/babel-core/src/ -d packages/babel-core/lib
>> SyntaxError: packages/babel-core/src/config/caching.js: Unexpected 
>> token (49:56)
>>  47 | handler: (ArgT, CacheConfigurator<SideChannel>) => 
>> Handler<ResultT> | ResultT,
>>  48 | ): (ArgT, SideChannel) => Handler<ResultT> {
>> > 49 | return makeCachedFunction<ArgT, ResultT, SideChannel, 
>> *>(WeakMap, handler);
>>     | ^
>>  50 | }
>>  51 |
>>  52 | export function makeWeakCacheSync<ArgT, ResultT, SideChannel>(
> 
> Jishnu identified it as flow syntax and probably we can get rid of it 
> with an updated version of
> https://www.npmjs.com/package/flow-remove-types

And this requires packaging flow-parser which is written in OCaml. 
Anyone here familar with OCaml? Any comments if this route is worth 
pursuing?