Merge PR #137 (closes #136).

appveyor.yml

@@ -26,6 +26,7 @@ install:
 
   # install modules
   - npm install
+  - cd .\resolvers\webpack && npm install && cd ..\..
 
 # Post-install test scripts.
 test_script:
@@ -34,6 +35,7 @@ test_script:
   - npm --version
   # run tests
   - npm run-script ci-test
+  - cd .\resolvers\webpack && npm test
 
 # Don't actually build.
 build: off

resolvers/webpack/index.js

@@ -3,6 +3,8 @@ var findRoot = require('find-root')
   , resolve = require('resolve')
   , get = require('lodash.get')
   , find = require('array-find')
+  // not available on 0.10.x
+  , isAbsolute = path.isAbsolute || require('is-absolute')
 
 var resolveAlias = require('./resolve-alias')
 
@@ -26,12 +28,19 @@ exports.resolveImport = function resolveImport(source, file, settings) {
 
   if (resolve.isCore(source)) return null
 
-  var webpackConfig
+  var configPath = get(settings, 'config', 'webpack.config.js')
+    , webpackConfig
   try {
-    var packageDir = findRoot(file)
-    if (!packageDir) throw new Error('package not found above ' + file)
+    // see if we've got an absolute path
+    if (!isAbsolute(configPath)) {
+      // if not, find ancestral package.json and use its directory as base for the path
+      var packageDir = findRoot(file)
+      if (!packageDir) throw new Error('package not found above ' + file)
 
-    webpackConfig = require(path.join(packageDir, get(settings, 'config', 'webpack.config.js')))
+      configPath = path.join(packageDir, configPath)
+    }
+
+    webpackConfig = require(configPath)
   } catch (err) {
     webpackConfig = {}
   }

resolvers/webpack/package.json

@@ -26,6 +26,7 @@
   "dependencies": {
     "array-find": "^1.0.0",
     "find-root": "^0.1.1",
+    "is-absolute": "^0.2.3",
     "lodash.get": "^3.7.0",
     "resolve": "^1.1.6"
   },

resolvers/webpack/resolve-alias.js

@@ -13,10 +13,12 @@ module.exports = function resolveAlias(source, aliases) {
   return source
 }
 
+// using '/' only for consistency with Webpack docs
+var sep = '/'
 function matchAlias(source, alias, value) {
   var isExact = (alias[alias.length - 1] === '$')
     , isFile = (path.extname(value) !== '')
-    , segments = source.split(path.sep)
+    , segments = source.split(sep)
 
   if (isExact) alias = alias.slice(0, -1)
 
@@ -30,7 +32,7 @@ function matchAlias(source, alias, value) {
     }
 
     // otherwise, prefix match is fine for non-file paths
-    if (!isExact && !isFile) return [value].concat(segments.slice(1)).join(path.sep)
+    if (!isExact && !isFile) return [value].concat(segments.slice(1)).join(sep)
   }
 
 }

resolvers/webpack/test/config.js

@@ -0,0 +1,22 @@
+var chai =  require('chai')
+  , expect = chai.expect
+
+import { resolveImport as resolve } from '../index'
+
+import path from 'path'
+
+var file = path.join(__dirname, 'files', 'src', 'jsx', 'dummy.js')
+var absoluteSettings = {
+  config: path.join(__dirname, 'files', 'some', 'absolute.path.webpack.config.js'),
+}
+
+describe("config", function () {
+  it("finds webpack.config.js in parent directories", function () {
+    expect(resolve('main-module', file)).to.exist
+        .and.equal(path.join(__dirname, 'files', 'src', 'main-module.js'))
+  })
+  it("finds absolute webpack.config.js files", function () {
+    expect(resolve('foo', file, absoluteSettings)).to.exist
+        .and.equal(path.join(__dirname, 'files', 'some', 'absolutely', 'goofy', 'path', 'foo.js'))
+  })
+})

resolvers/webpack/test/files/some/absolute.path.webpack.config.js

@@ -0,0 +1,16 @@
+var path = require('path')
+
+module.exports = {
+  resolve: {
+    alias: {
+      'foo': path.join(__dirname, 'absolutely', 'goofy', 'path', 'foo.js'),
+    },
+    modulesDirectories: ['node_modules', 'bower_components'],
+    root: path.join(__dirname, 'src'),
+  },
+
+  externals: [
+    { 'jquery': 'jQuery' },
+    'bootstrap',
+  ],
+}