Unable to use plugin on Windows, project tests also failing

[mattdsteele]

I'm trying to use this in a Metalsmith project I just started, but am getting an error regarding Invalid Paths on Windows.

It's reproducible in this project if I run npm test on my Windows machines. I see these failures:

  metalsmith-webpack
    1) should pack basic
    2) should pack complex


  0 passing (200ms)
  2 failing

  1) metalsmith-webpack should pack basic:
     Uncaught Error: Invalid path '\js\index.js'
      at pathToArray (C:\code\github\metalsmith-webpack\node_modules\memory-fs\lib\MemoryFileSystem.js:23:38)
      at MemoryFileSystem.readFileSync (C:\code\github\metalsmith-webpack\node_modules\memory-fs\lib\MemoryFileSystem.js:71:13)
      at C:\code\github\metalsmith-webpack\lib\index.js:20:34
      at Array.forEach (native)
      at C:\code\github\metalsmith-webpack\lib\index.js:16:48
      at Compiler.<anonymous> (C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compiler.js:194:14)
      at Compiler.emitRecords (C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compiler.js:282:37)
      at Compiler.<anonymous> (C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compiler.js:187:11)
      at C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compiler.js:275:11
      at Compiler.applyPluginsAsync (C:\code\github\metalsmith-webpack\node_modules\tapable\lib\Tapable.js:60:69)
      at Compiler.afterEmit (C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compiler.js:272:8)
      at Compiler.<anonymous> (C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compiler.js:267:14)
      at C:\code\github\metalsmith-webpack\node_modules\async\lib\async.js:52:16
      at Object.async.forEachOf.async.eachOf (C:\code\github\metalsmith-webpack\node_modules\async\lib\async.js:236:30)
      at Object.async.forEach.async.each (C:\code\github\metalsmith-webpack\node_modules\async\lib\async.js:209:22)
      at Compiler.emitFiles (C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compiler.js:235:20)
      at MemoryFileSystem.(anonymous function) [as mkdirp] (C:\code\github\metalsmith-webpack\node_modules\webpack\node_modules\memory-fs\lib\MemoryFileSystem.js:283:10)
      at Compiler.<anonymous> (C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compiler.js:229:25)
      at Compiler.applyPluginsAsync (C:\code\github\metalsmith-webpack\node_modules\tapable\lib\Tapable.js:60:69)
      at Compiler.emitAssets (C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compiler.js:226:7)
      at Compiler.<anonymous> (C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compiler.js:184:10)
      at C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compiler.js:403:12
      at Compiler.next (C:\code\github\metalsmith-webpack\node_modules\tapable\lib\Tapable.js:67:11)
      at Compiler.<anonymous> (C:\code\github\metalsmith-webpack\node_modules\webpack\lib\CachePlugin.js:40:4)
      at Compiler.applyPluginsAsync (C:\code\github\metalsmith-webpack\node_modules\tapable\lib\Tapable.js:71:13)
      at Compiler.<anonymous> (C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compiler.js:400:9)
      at Compilation.<anonymous> (C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compilation.js:577:13)
      at Compilation.applyPluginsAsync (C:\code\github\metalsmith-webpack\node_modules\tapable\lib\Tapable.js:60:69)
      at Compilation.<anonymous> (C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compilation.js:572:10)
      at Compilation.applyPluginsAsync (C:\code\github\metalsmith-webpack\node_modules\tapable\lib\Tapable.js:60:69)
      at Compilation.<anonymous> (C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compilation.js:567:9)
      at Compilation.applyPluginsAsync (C:\code\github\metalsmith-webpack\node_modules\tapable\lib\Tapable.js:60:69)
      at Compilation.<anonymous> (C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compilation.js:563:8)
      at Compilation.applyPluginsAsync (C:\code\github\metalsmith-webpack\node_modules\tapable\lib\Tapable.js:60:69)
      at Compilation.seal (C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compilation.js:525:7)
      at Compiler.<anonymous> (C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compiler.js:397:15)
      at C:\code\github\metalsmith-webpack\node_modules\tapable\lib\Tapable.js:103:11
      at Compilation.<anonymous> (C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compilation.js:445:10)
      at C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compilation.js:417:12
      at C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compilation.js:332:10
      at C:\code\github\metalsmith-webpack\node_modules\async\lib\async.js:52:16
      at done (C:\code\github\metalsmith-webpack\node_modules\async\lib\async.js:246:17)
      at C:\code\github\metalsmith-webpack\node_modules\async\lib\async.js:44:16
      at C:\code\github\metalsmith-webpack\node_modules\webpack\lib\Compilation.js:332:10
      at C:\code\github\metalsmith-webpack\node_modules\async\lib\async.js:52:16
      at done (C:\code\github\metalsmith-webpack\node_modules\async\lib\async.js:246:17)
      at C:\code\github\metalsmith-webpack\node_modules\async\lib\async.js:44:16

  2) metalsmith-webpack should pack complex:
     Uncaught Error: ENOENT, no such file or directory 'C:\code\github\metalsmith-webpack\test\fixtures\basic\build'
      at Object.fs.lstatSync (fs.js:679:18)
      at read (C:\code\github\metalsmith-webpack\node_modules\fs-readdir-recursive\index.js:12:10)
      at assertDirEqual (C:\code\github\metalsmith-webpack\node_modules\assert-dir-equal\lib\index.js:24:19)
      at Metalsmith.<anonymous> (C:\code\github\metalsmith-webpack\test\index.js:41:17)
      at Object._onImmediate (C:\code\github\metalsmith-webpack\node_modules\co\index.js:52:14)

Tested on two Windows machines, one with node 0.10.26, one with node 5.1.0. Running on a Mac with node 0.12.7 works fine.

The version of webpack pulled down is 1.12.9. If I run webpack standalone using the same configuration in my project, it works fine.

I'm not super familiar with how the plugin runs, but I'm guessing there was an API change in Webpack for Windows machines that the Metalsmith plugin doesn't handle?