Fixing dynamic require missing from webpack

When running `yarn pack` with a bundledDependency yarn was throwing
an error: "error An unexpected error occurred: "Cannot find module \".\""."

This was due to yarn's cli.js being transpiled to on line 110321:

```
var thePackage = !(function webpackMissingModule() { var e = new Error("Cannot find module \".\""); e.code = 'MODULE_NOT_FOUND'; throw e; }());
```

This line comes from https://github.com/stefanpenner/hash-for-dep/blob/e849d3e2f0350810716a0e504c84603362229570/lib/pkg.js#L20
and is a dynamic require. This commit impements a fix for this based on the guidence from webpack/webpack#4175 (comment)

This code was originally added with yarnpkg#5966

package.json

@@ -95,6 +95,7 @@
     "minimatch": "^3.0.4",
     "mock-stdin": "^0.3.0",
     "prettier": "^1.5.2",
+    "string-replace-loader": "^2.1.1",
     "temp": "^0.8.3",
     "webpack": "^2.1.0-beta.25",
     "yargs": "^6.3.0"

scripts/build-webpack.js

@@ -85,6 +85,20 @@ const compiler = webpack({
         test: /rx\.lite\.aggregates\.js/,
         use: 'imports-loader?define=>false'
       },
+      {
+        // regex for the files that are problematic
+        test: /hash-for-dep\/lib\/pkg.js/,
+        loader: 'string-replace-loader',
+        options: {
+          // match a require function call where the argument isn't a string
+          // also capture the first character of the args so we can ignore it later
+          search: 'require[(]([^\'"])',
+          // replace the 'require(' with a '__non_webpack_require__(', meaning it will require the files at runtime
+          // $1 grabs the first capture group from the regex, the one character we matched and don't want to lose
+          replace: '__non_webpack_require__($1',
+          flags: 'g'
+        }
+      }
     ],
   },
   plugins: [

yarn.lock

@@ -102,7 +102,7 @@ ajv-keywords@^1.1.1:
   resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-1.5.1.tgz#314dd0a4b3368fad3dfcdc54ede6171b886daf3c"
   integrity sha1-MU3QpLM2j609/NxU7eYXG4htrzw=
 
-ajv-keywords@^3.0.0:
+ajv-keywords@^3.0.0, ajv-keywords@^3.1.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-3.2.0.tgz#e86b819c602cf8821ad637413698f1dec021847a"
   integrity sha1-6GuBnGAs+IIa1jdBNpjx3sAhhHo=
@@ -135,6 +135,16 @@ ajv@^6.0.1:
     json-schema-traverse "^0.4.1"
     uri-js "^4.2.1"
 
+ajv@^6.1.0:
+  version "6.6.2"
+  resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.6.2.tgz#caceccf474bf3fc3ce3b147443711a24063cc30d"
+  integrity sha512-FBHEW6Jf5TB9MGBgUUA9XHkTbjXYfAUjY43ACMfmdMRHniyoMHjHjzD50OK8LGDWQwp4rWEsIq5kEqq7rvIM1g==
+  dependencies:
+    fast-deep-equal "^2.0.1"
+    fast-json-stable-stringify "^2.0.0"
+    json-schema-traverse "^0.4.1"
+    uri-js "^4.2.2"
+
 align-text@^0.1.1, align-text@^0.1.3:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/align-text/-/align-text-0.1.4.tgz#0cd90a561093f35d0a99256c22b7069433fad117"
@@ -1376,6 +1386,11 @@ big.js@^3.1.3:
   resolved "https://registry.yarnpkg.com/big.js/-/big.js-3.2.0.tgz#a5fc298b81b9e0dca2e458824784b65c52ba588e"
   integrity sha512-+hN/Zh2D08Mx65pZ/4g5bsmNiZUuChDiQfTUQ7qJr4/kuopCr88xZsAXv6mBoZEsUI4OuGHlX59qE94K2mMW8Q==
 
+big.js@^5.2.2:
+  version "5.2.2"
+  resolved "https://registry.yarnpkg.com/big.js/-/big.js-5.2.2.tgz#65f0af382f578bcdc742bd9c281e9cb2d7768328"
+  integrity sha512-vyL2OymJxmarO8gxMr0mhChsO9QGwhynfuu4+MHTAW6czfq9humCB7rKpUjDd9YUiDPU4mzpyupFSvOClAwbmQ==
+
 binary-extensions@^1.0.0:
   version "1.11.0"
   resolved "https://registry.yarnpkg.com/binary-extensions/-/binary-extensions-1.11.0.tgz#46aa1751fb6a2f93ee5e689bb1087d4b14c6c205"
@@ -4771,6 +4786,13 @@ json5@^0.5.0, json5@^0.5.1:
   resolved "https://registry.yarnpkg.com/json5/-/json5-0.5.1.tgz#1eade7acc012034ad84e2396767ead9fa5495821"
   integrity sha1-Hq3nrMASA0rYTiOWdn6tn6VJWCE=
 
+json5@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/json5/-/json5-1.0.1.tgz#779fb0018604fa854eacbf6252180d83543e3dbe"
+  integrity sha512-aKS4WQjPenRxiQsC93MNfjx+nbF4PAdYzmd/1JIj8HYzqfbu86beTuNgXDzPknWk0n0uARlyewZo4s++ES36Ow==
+  dependencies:
+    minimist "^1.2.0"
+
 jsonfile@^2.1.0:
   version "2.4.0"
   resolved "https://registry.yarnpkg.com/jsonfile/-/jsonfile-2.4.0.tgz#3736a2b428b87bbda0cc83b53fa3d633a35c2ae8"
@@ -4947,6 +4969,15 @@ loader-utils@^1.0.2:
     emojis-list "^2.0.0"
     json5 "^0.5.0"
 
+loader-utils@^1.1.0:
+  version "1.2.3"
+  resolved "https://registry.yarnpkg.com/loader-utils/-/loader-utils-1.2.3.tgz#1ff5dc6911c9f0a062531a4c04b609406108c2c7"
+  integrity sha512-fkpz8ejdnEMG3s37wGL07iSBDg99O9D5yflE9RGNH3hRdx9SOwYfnGYdZOUIZitN8E+E2vkq3MUMYMvPYl5ZZA==
+  dependencies:
+    big.js "^5.2.2"
+    emojis-list "^2.0.0"
+    json5 "^1.0.1"
+
 locate-path@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/locate-path/-/locate-path-2.0.0.tgz#2b568b265eec944c6d9c0de9c3dbbbca0354cd8e"
@@ -6614,6 +6645,14 @@ sax@^1.2.4:
   resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.4.tgz#2816234e2378bddc4e5354fab5caa895df7100d9"
   integrity sha512-NqVDv9TpANUjFm0N8uM5GxL36UgKi9/atZw+x7YFnQ8ckwFGKrl4xX4yWtrey3UJm5nP1kUbnYgLopqWNSRhWw==
 
+schema-utils@^0.4.5:
+  version "0.4.7"
+  resolved "https://registry.yarnpkg.com/schema-utils/-/schema-utils-0.4.7.tgz#ba74f597d2be2ea880131746ee17d0a093c68187"
+  integrity sha512-v/iwU6wvwGK8HbU9yi3/nhGzP0yGSuhQMzL6ySiec1FSrZZDkhm4noOSWzrNFo/jEc+SJY6jRTwuwbSXJPDUnQ==
+  dependencies:
+    ajv "^6.1.0"
+    ajv-keywords "^3.1.0"
+
 semver-greatest-satisfied-range@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/semver-greatest-satisfied-range/-/semver-greatest-satisfied-range-1.1.0.tgz#13e8c2658ab9691cb0cd71093240280d36f77a5b"
@@ -6953,6 +6992,14 @@ string-length@^2.0.0:
     astral-regex "^1.0.0"
     strip-ansi "^4.0.0"
 
+string-replace-loader@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/string-replace-loader/-/string-replace-loader-2.1.1.tgz#b72e7b57b6ef04efe615aff0ad989b5c14ca63d1"
+  integrity sha512-0Nvw1LDclF45AFNuYPcD2Jvkv0mwb/dQSnJZMvhqGrT+zzmrpG3OJFD600qfQfNUd5aqfp7fCm2mQMfF7zLbyQ==
+  dependencies:
+    loader-utils "^1.1.0"
+    schema-utils "^0.4.5"
+
 string-width@^1.0.1, string-width@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/string-width/-/string-width-1.0.2.tgz#118bdf5b8cdc51a2a7e70d211e07e2b0b9b107d3"
@@ -7415,7 +7462,7 @@ upath@^1.0.5:
   resolved "https://registry.yarnpkg.com/upath/-/upath-1.1.0.tgz#35256597e46a581db4793d0ce47fa9aebfc9fabd"
   integrity sha512-bzpH/oBhoS/QI/YtbkqCg6VEiPYjSZtrHQM6/QnJS6OL9pKUFLqb3aFh4Scvwm45+7iAgiMkLhSbaZxUqmrprw==
 
-uri-js@^4.2.1:
+uri-js@^4.2.1, uri-js@^4.2.2:
   version "4.2.2"
   resolved "https://registry.yarnpkg.com/uri-js/-/uri-js-4.2.2.tgz#94c540e1ff772956e2299507c010aea6c8838eb0"
   integrity sha512-KY9Frmirql91X2Qgjry0Wd4Y+YTdrdZheS8TFwvkbLWf/G5KNJDCh6pKL5OZctEW4+0Baa5idK2ZQuELRwPznQ==