Babel plugin support?

[c-lliope]

Hello! I'm trying out Flow on my Rails app, and I'm trying to set up ruby-babel-transpiler to strip out Flow type annotations.

There's an existing Babel plugin that can take care of this, but it doesn't look like it's available in ruby-babel-transpiler.

I've added this configuration to my config/application.rb file:

    config.react.jsx_transform_options = {
      "plugins" => ["transform-flow-strip-types"],
    }

And in the browser, I get an error:

ReferenceError: Unknown plugin "transform-flow-strip-types"

I'm curious - is there a plan to make babel plugins available through this project? Would they be packaged as separate gems? If so, what would the structure of those gems look like?

[ralekna]

As far as I know Babel automatically strips Flow annotations itself during transpilation and it doesn't need additional plugin for that. Have in mind that Flow is just a static type checker and doesn't add any code transformations and is more a code documentation tool.

[c-lliope]

@ralekna thanks for the fast response!

According to Flow's documentation, a special plugin is needed to strip out Flow annotations. I've tried using Flow in my Rails project without the plugin, and I got syntax errors that prevented the JS on the page from running.

The bottom section of this page shows what the flow plugin is doing when it transforms the input.

[hzoo]

The http://babeljs.io/docs/plugins/transform-flow-strip-types/ plugin is for babel 6 which has no plugins by default thus everything is opt-in.

[ralekna]

@Graysonwright it's a bit strange because as I see a PR for Babel v.6 (#282) is not yet merged into master. Are you really sure that those syntax errors are cause by Flow markup? I use current version of this gem with Flow annotations and it works like a charm without adding any plugins.

[c-lliope]

@ralekna - sorry for letting this get stale. I no longer have access to the app, so I'm not able to reproduce. It seems like it's working well for everyone else, so I'm OK closing this.

Thanks for your help!

[selvagsz]

Getting the same error while using transform-decorators plugin. Are there any plans to merge the babel v6 PR ?