Unknown Plugin "transform-es2015-block-scoping"

[wdullaer]

Since upgrading to rewire 3.0.0 some of my builds are failing because babel can't load the "transform-es2015-block-scoping" plugin.
The stacktrace indicates that rewire is trying to load this (my own code does not rely on babel).
You can see at the top of the stactrace that babel is looking for node_modules in the directory where the rewired file lives, rather than the current working directory.

Some research (babel/babel#5618) seems to indicate that this is a known issue with babel 6.
As of babel 7, babel will try to resolve plugins relative to the cwd, or, you could explicitly specify the location of the plugin using babel.resolvePlugin('foo', '/my-dir')

If you know of any other workaround, I'm all ears :-)

Stacktrace:

/node_modules/rewire/node_modules/babel-core/lib/transformation/file/options/option-manager.js:180
          throw new ReferenceError(messages.get("pluginUnknown", plugin, loc, i, dirname));                                                                                                   
          ^                                                                                                                                                                                   

ReferenceError: Unknown plugin "transform-es2015-block-scoping" specified in "base" at 0, attempted to resolve relative to "/lib"                                                             
    at /node_modules/rewire/node_modules/babel-core/lib/transformation/file/options/option-manager.js:180:17                                                                                  
    at Array.map (native)                                                                                                                                                                     
    at Function.normalisePlugins (/node_modules/rewire/node_modules/babel-core/lib/transformation/file/options/option-manager.js:158:20)                                                      
    at OptionManager.mergeOptions (/node_modules/rewire/node_modules/babel-core/lib/transformation/file/options/option-manager.js:234:36)                                                     
    at OptionManager.init (/node_modules/rewire/node_modules/babel-core/lib/transformation/file/options/option-manager.js:368:12)                                                             
    at File.initOptions (/node_modules/rewire/node_modules/babel-core/lib/transformation/file/index.js:212:65)                                                                                
    at new File (/node_modules/rewire/node_modules/babel-core/lib/transformation/file/index.js:135:24)                                                                                        
    at Pipeline.transform (/node_modules/rewire/node_modules/babel-core/lib/transformation/pipeline.js:46:16)
    at Module.module._compile (/node_modules/rewire/lib/moduleEnv.js:78:29)
    at Object.Module._extensions..js (module.js:416:10)
    at Object.jsExtension (/node_modules/rewire/lib/moduleEnv.js:87:24)
    at Module.load (module.js:343:32)
    at Object.load (/node_modules/rewire/lib/moduleEnv.js:23:18)
    at internalRewire (/node_modules/rewire/lib/rewire.js:50:15)
    at rewire (/node_modules/rewire/lib/index.js:11:12)
    at Object.<anonymous> (/test/index.js:12:18)
    at Module._compile (module.js:409:26)
    at Object.Module._extensions..js (module.js:416:10)
    at Module.load (module.js:343:32)
    at Function.Module._load (module.js:300:12)
    at Module.require (module.js:353:17)
    at require (internal/module.js:12:17)
    at /node_modules/mocha/lib/mocha.js:231:27
    at Array.forEach (native)
    at Mocha.loadFiles (/node_modules/mocha/lib/mocha.js:228:14)
    at Mocha.run (/node_modules/mocha/lib/mocha.js:514:10)
    at Object.<anonymous> (/node_modules/mocha/bin/_mocha:484:18)
    at Module._compile (module.js:409:26)
    at Object.Module._extensions..js (module.js:416:10)
    at Module.load (module.js:343:32)
    at Function.Module._load (module.js:300:12)
    at Function.Module.runMain (module.js:441:10)
    at startup (node.js:140:18)
    at node.js:1043:3

[JvJefke]

Babel was introduced into 3.0.0 to enable mocking of const variables. Could you give example code so I can reproduce this error?

[wdullaer]

Checkout https://github.com/wdullaer/oplog-emitter and run npm run mocha on node 4
The issue does not occur on later node versions (presumably because babel realises that the features it's trying to compile are natively supported by the runtime and therefore does not hit the problematic code path)

[JvJefke]

Thx! I opened a PR that should fix this. see #122.

[wdullaer]

Cool!
I'm not an expert on the internals of require, so I opened an issue rather than a PR.
Also thanks for this library that I've been happily using for a long time 👍

[jhnns]

Awesome, thanks. Sorry for the broken version. I think I've used require.resolve locally but haven't committed it somehow...

Shipped with 3.0.1